Steve Mould – This microscope uses touch
Caustic lenses are really weird
The Assassin’s Teapot Is Weird
The Most Powerful Computers You’ve Never Heard Of
Spiny Norman said:
The Assassin’s Teapot Is Weird
Don’t drop in for afternoon tea.
How Did She Rip Her Bottom On This Rock?
In this video, we investigate the effect of squat and see how it can mean that ships hit rocks deeper than their own draft. We use the example of the QE2, which struck an uncharted shoal after experiencing squat.
roughbarked said:
Spiny Norman said:
The Assassin’s Teapot Is WeirdDon’t drop in for afternoon tea.
nods
Arts said:
Spiny Norman said:
The Assassin’s Teapot Is Weirdnah it’s very cool
I do like Steve Mould’s videos.
Spiny Norman said:
The Most Powerful Computers You’ve Never Heard Of
Enjoyed this one enormously. But it’s not about powerful computers,
it’s about tide prediction using a rotating ball moving back and forth across a sinusoidal oscillating plate, and suchlike.
Spiny Norman said:
Caustic lenses are really weird
Caustic mirrors are ancient Chinese technology. I was given one many years ago by a Chinese chap at a conference. Reflect sunlight on it and it projects an image.
They may even date back to the bronze age. It’s a way of hiding a message in plain sight, so would have been very useful for coded communications. It doesn’t require massive computers to produce, just high art.
Think of it this way. In order to get a focus from parallel rays (sunlight) at a fixed distance from the mirror (or lens) the curvature is exactly constant over all those parts the are involved in deflecting the light. A constant focal length can be created easily using just a mandrel, hammer and mallet. Nothing fancy needed.
You can compute it if you want to, but it isn’t necessary.
Spiny Norman said:
How Did She Rip Her Bottom On This Rock?In this video, we investigate the effect of squat and see how it can mean that ships hit rocks deeper than their own draft. We use the example of the QE2, which struck an uncharted shoal after experiencing squat.
The ‘negative pressure’ along the sides thing is a factor when a ship traverses a narrow channel, like a ship canal, and the interaction of that low pressure area and the canal bank is known, not unsurprisingly, as ‘canal effect’. It’s a bit of a quirky thing, and can manifest in other ways – for instance, when turning to enter a narrow waterway, you may have to take off the turn and begin to straighten up rather earlier than you would in open water. And, as the video shows, it works similarly underneath the ship as well.
The ’10% of draught’ rule mentioned is not something that i’d ever contemplate, although merchant captains may be ok with it, driven by economics as they are. Given that the soundings shown on the chart are quite often just ‘spot’ measurements, taken perhaps by hand lead-and-line by Matthew Flinders back in 1820 or somesuch, and not a complete picture of the sea-floor, i wouldn’t be at all happy with less than 20% of the draught, and preferably a rather larger measure than that.
mollwollfumble said:
Spiny Norman said:
Caustic lenses are really weirdCaustic mirrors are ancient Chinese technology. I was given one many years ago by a Chinese chap at a conference. Reflect sunlight on it and it projects an image.
They may even date back to the bronze age. It’s a way of hiding a message in plain sight, so would have been very useful for coded communications. It doesn’t require massive computers to produce, just high art.
Think of it this way. In order to get a focus from parallel rays (sunlight) at a fixed distance from the mirror (or lens) the curvature is exactly constant over all those parts the are involved in deflecting the light. A constant focal length can be created easily using just a mandrel, hammer and mallet. Nothing fancy needed.
You can compute it if you want to, but it isn’t necessary.
There was an item on imgur the other day.
A bloke had fashioned an array of small hexagonal mirrors arranged such that, when held at the proper angle to the sun during a beach walk with his partner, some of the mirrors’ reflected light spelled out MARRY ME on the beach sand.
captain_spalding said:
mollwollfumble said:
Spiny Norman said:
Caustic lenses are really weirdCaustic mirrors are ancient Chinese technology. I was given one many years ago by a Chinese chap at a conference. Reflect sunlight on it and it projects an image.
They may even date back to the bronze age. It’s a way of hiding a message in plain sight, so would have been very useful for coded communications. It doesn’t require massive computers to produce, just high art.
Think of it this way. In order to get a focus from parallel rays (sunlight) at a fixed distance from the mirror (or lens) the curvature is exactly constant over all those parts the are involved in deflecting the light. A constant focal length can be created easily using just a mandrel, hammer and mallet. Nothing fancy needed.
You can compute it if you want to, but it isn’t necessary.
There was an item on imgur the other day.
A bloke had fashioned an array of small hexagonal mirrors arranged such that, when held at the proper angle to the sun during a beach walk with his partner, some of the mirrors’ reflected light spelled out MARRY ME on the beach sand.
Tamb said:
captain_spalding said:
mollwollfumble said:Caustic mirrors are ancient Chinese technology. I was given one many years ago by a Chinese chap at a conference. Reflect sunlight on it and it projects an image.
They may even date back to the bronze age. It’s a way of hiding a message in plain sight, so would have been very useful for coded communications. It doesn’t require massive computers to produce, just high art.
Think of it this way. In order to get a focus from parallel rays (sunlight) at a fixed distance from the mirror (or lens) the curvature is exactly constant over all those parts the are involved in deflecting the light. A constant focal length can be created easily using just a mandrel, hammer and mallet. Nothing fancy needed.
You can compute it if you want to, but it isn’t necessary.
There was an item on imgur the other day.
A bloke had fashioned an array of small hexagonal mirrors arranged such that, when held at the proper angle to the sun during a beach walk with his partner, some of the mirrors’ reflected light spelled out MARRY ME on the beach sand.
That poor misguided woman. Imagine being married to someone as nerdy as that.
I mean who could be bothered with that much effort, wear them down till they give up and say yes to shut you up
Michael V said:
Arts said:
Spiny Norman said:
The Assassin’s Teapot Is Weirdnah it’s very cool
I do like Steve Mould’s videos.
He even has a thingy, kind of named after him.
https://en.wiktionary.org/wiki/Mould_effect
The construction of the Hoover Dam in the USA.
Spiny Norman said:
The construction of the Hoover Dam in the USA.
Samuyau photos!
Sand drag racing in Dubai Some vehicles claim to have 4,000 Hp:
https://www.youtube.com/watch?v=WAJi5FReiCs
Michael V said:
Sand drag racing in Dubai Some vehicles claim to have 4,000 Hp:https://www.youtube.com/watch?v=WAJi5FReiCs
Nice!
I’m not a fan of drag racing at all, but I am very impressed with the Top Fuel drag cars. They cracked 11,000 hp a couple of years ago. One of my fave parts is the start & warm-up in the pits. They start the engine using fairly regular fuel, then after a second or so transition to full nitromethane. See if you can spot when that happens. :)
Spiny Norman said:
Michael V said:
Sand drag racing in Dubai Some vehicles claim to have 4,000 Hp:https://www.youtube.com/watch?v=WAJi5FReiCs
Nice!
I’m not a fan of drag racing at all, but I am very impressed with the Top Fuel drag cars. They cracked 11,000 hp a couple of years ago. One of my fave parts is the start & warm-up in the pits. They start the engine using fairly regular fuel, then after a second or so transition to full nitromethane. See if you can spot when that happens. :)
Very high tick-over on that one. Yeah, the transition from petrol to nitro makes the engine sound so much angrier.
Michael V said:
Spiny Norman said:
Michael V said:
Sand drag racing in Dubai Some vehicles claim to have 4,000 Hp:https://www.youtube.com/watch?v=WAJi5FReiCs
Nice!
I’m not a fan of drag racing at all, but I am very impressed with the Top Fuel drag cars. They cracked 11,000 hp a couple of years ago. One of my fave parts is the start & warm-up in the pits. They start the engine using fairly regular fuel, then after a second or so transition to full nitromethane. See if you can spot when that happens. :)Very high tick-over on that one. Yeah, the transition from petrol to nitro makes the engine sound so much angrier.
Michael V said:
Spiny Norman said:
Michael V said:
Sand drag racing in Dubai Some vehicles claim to have 4,000 Hp:https://www.youtube.com/watch?v=WAJi5FReiCs
Nice!
I’m not a fan of drag racing at all, but I am very impressed with the Top Fuel drag cars. They cracked 11,000 hp a couple of years ago. One of my fave parts is the start & warm-up in the pits. They start the engine using fairly regular fuel, then after a second or so transition to full nitromethane. See if you can spot when that happens. :)Very high tick-over on that one. Yeah, the transition from petrol to nitro makes the engine sound so much angrier.
This is a great interview with Don Garlits. Watch the whole thing to get the context of it, but the best part starts at about the four minute mark.
Spiny Norman said:
Michael V said:
Spiny Norman said:Nice!
I’m not a fan of drag racing at all, but I am very impressed with the Top Fuel drag cars. They cracked 11,000 hp a couple of years ago. One of my fave parts is the start & warm-up in the pits. They start the engine using fairly regular fuel, then after a second or so transition to full nitromethane. See if you can spot when that happens. :)Very high tick-over on that one. Yeah, the transition from petrol to nitro makes the engine sound so much angrier.
This is a great interview with Don Garlits. Watch the whole thing to get the context of it, but the best part starts at about the four minute mark.
I met Don Garlits in Sydney at the Castlereagh Dragstrip in (IIRC) 1975. He seemed like a nice bloke.
Did you see the Garlits interview in “Coltraine’s Trains, Planes and Automobiles?” No discussion of nitro. Instead, they discussed, worked on and fired up a Hemi Chrysler that ran a WWII air-raid siren.
Michael V said:
Spiny Norman said:
Michael V said:Very high tick-over on that one. Yeah, the transition from petrol to nitro makes the engine sound so much angrier.
This is a great interview with Don Garlits. Watch the whole thing to get the context of it, but the best part starts at about the four minute mark.
I met Don Garlits in Sydney at the Castlereagh Dragstrip in (IIRC) 1975. He seemed like a nice bloke.
Did you see the Garlits interview in “Coltraine’s Trains, Planes and Automobiles?” No discussion of nitro. Instead, they discussed, worked on and fired up a Hemi Chrysler that ran a WWII air-raid siren.
I remember the siren, but that was many years ago and I wouldn’t have known who Garlits was back then. I’m impressed that you were lucky to meet him! You know he’s the one that first put the engine behind the driver in the TF class?
Lab-grown 3D skin grafts could be applied like “biological clothing”.
Spiny Norman said:
Michael V said:
Spiny Norman said:This is a great interview with Don Garlits. Watch the whole thing to get the context of it, but the best part starts at about the four minute mark.
I met Don Garlits in Sydney at the Castlereagh Dragstrip in (IIRC) 1975. He seemed like a nice bloke.
Did you see the Garlits interview in “Coltraine’s Trains, Planes and Automobiles?” No discussion of nitro. Instead, they discussed, worked on and fired up a Hemi Chrysler that ran a WWII air-raid siren.
I remember the siren, but that was many years ago and I wouldn’t have known who Garlits was back then. I’m impressed that you were lucky to meet him! You know he’s the one that first put the engine behind the driver in the TF class?
Yes. I was aware of that.
One of the good things about drag racing is that the pits are completely open to the public. You can wander around, watch and have conversations.
captain_spalding said:
mollwollfumble said:
Spiny Norman said:
Caustic lenses are really weirdCaustic mirrors are ancient Chinese technology. I was given one many years ago by a Chinese chap at a conference. Reflect sunlight on it and it projects an image.
They may even date back to the bronze age. It’s a way of hiding a message in plain sight, so would have been very useful for coded communications. It doesn’t require massive computers to produce, just high art.
Think of it this way. In order to get a focus from parallel rays (sunlight) at a fixed distance from the mirror (or lens) the curvature is exactly constant over all those parts the are involved in deflecting the light. A constant focal length can be created easily using just a mandrel, hammer and mallet. Nothing fancy needed.
You can compute it if you want to, but it isn’t necessary.
There was an item on imgur the other day.
A bloke had fashioned an array of small hexagonal mirrors arranged such that, when held at the proper angle to the sun during a beach walk with his partner, some of the mirrors’ reflected light spelled out MARRY ME on the beach sand.
Saw a mirror of that. Made the same comment there. Ancient Chinese technology.
The audacious rescue plan that might have saved space shuttle Columbia
The untold story of the rescue mission that could have been NASA’s finest hour.
The first ever X-ray image was taken in 1895 by Wilhelm Röntgen, awarded the first Nobel Prize in Physics, 1901. The image of his wife Bertha’s hand (wedding ring clearly visible) propelled Röntgen into an international celebrity. Röntgen named the discovery X-rays, after the mathematical term ‘X’ which denotes something unknown. (Photo and caption by Nobel Prize Institute)
Looks like we may have an Aussie Elon – Matt Pearson:
https://alauda.aero/
https://airspeeder.com/
https://airspeeder.com/mission
https://exaseries.com/
Every Honour Earned by Nils the Military Penguin.
Sabine Hossenfelder
I Misunderstood the Greenhouse Effect. Here’s How It Works.
Living Photographs, photographs created by assembling sailors and soldiers, 1918.
rarehistoricalphotos.com/living-photographs-photographs-created-assembling-soldiers-1918
Spiny Norman said:
Living Photographs, photographs created by assembling sailors and soldiers, 1918.
rarehistoricalphotos.com/living-photographs-photographs-created-assembling-soldiers-1918
:)
Michael V said:
Spiny Norman said:
Living Photographs, photographs created by assembling sailors and soldiers, 1918.
rarehistoricalphotos.com/living-photographs-photographs-created-assembling-soldiers-1918
:)
Absolutely amazing!
Michael V said:
Spiny Norman said:
Living Photographs, photographs created by assembling sailors and soldiers, 1918.
rarehistoricalphotos.com/living-photographs-photographs-created-assembling-soldiers-1918
:)
Poor old Woody Wilson. He had just a bit too much faith in human nature, thought that his League of Nations could settle all their differences over a nice expense account beanfeast in Geneva.
It would have been a lot easier back in those days to propose, establish, and utilise armed forces under the control of the League to intervene in cases of national aggression. Who knows that they might not have blunted Mussolini’s ideas in the 1920s, or even given Hitler reason to reconsider in the 1930s?
But no, it was all to be sorted out with nothing more potentially lethal than hot air.
Michael V said:
Michael V said:
Spiny Norman said:
Living Photographs, photographs created by assembling sailors and soldiers, 1918.
rarehistoricalphotos.com/living-photographs-photographs-created-assembling-soldiers-1918
:)
Absolutely amazing!
Also, very clever.
captain_spalding said:
Michael V said:
Spiny Norman said:
Living Photographs, photographs created by assembling sailors and soldiers, 1918.
rarehistoricalphotos.com/living-photographs-photographs-created-assembling-soldiers-1918
:)
Poor old Woody Wilson. He had just a bit too much faith in human nature, thought that his League of Nations could settle all their differences over a nice expense account beanfeast in Geneva.
It would have been a lot easier back in those days to propose, establish, and utilise armed forces under the control of the League to intervene in cases of national aggression. Who knows that they might not have blunted Mussolini’s ideas in the 1920s, or even given Hitler reason to reconsider in the 1930s?
But no, it was all to be sorted out with nothing more potentially lethal than hot air.
and stiff upper lips.
The Varnhem Humerus, a broken bone repaired with a copper plate, and shows signs of healing afterwards. From Varnhem, Västergötland. Dated between 1260 and 1527.
Spiny Norman said:
The Varnhem Humerus, a broken bone repaired with a copper plate, and shows signs of healing afterwards. From Varnhem, Västergötland. Dated between 1260 and 1527.
So not every arm was amputated?
A team of astronomers found a “large excess of mass” under the Moon’s largest crater, the Aitken basin — likely a relic from an ancient asteroid impact event, but perhaps something much stranger.
“Imagine taking a pile of metal five times larger than the Big Island of Hawaii and burying it underground,” said lead author Peter B. James from Baylor University in Waco, Texas in a statement. “That’s roughly how much unexpected mass we detected.”
https://futurism.com/the-byte/deep-structure-mass-moon-crater
Spiny Norman said:
A team of astronomers found a “large excess of mass” under the Moon’s largest crater, the Aitken basin — likely a relic from an ancient asteroid impact event, but perhaps something much stranger.“Imagine taking a pile of metal five times larger than the Big Island of Hawaii and burying it underground,” said lead author Peter B. James from Baylor University in Waco, Texas in a statement. “That’s roughly how much unexpected mass we detected.”
https://futurism.com/the-byte/deep-structure-mass-moon-crater
Secret Nazi Moonbase?
Is that where the hush-hush Luftwaffe flying saucers transported Der Fuhrer? Is his disembodied head even now planning his comeback inside its glass Bell jar?
Spiny Norman said:
A team of astronomers found a “large excess of mass” under the Moon’s largest crater, the Aitken basin — likely a relic from an ancient asteroid impact event, but perhaps something much stranger.“Imagine taking a pile of metal five times larger than the Big Island of Hawaii and burying it underground,” said lead author Peter B. James from Baylor University in Waco, Texas in a statement. “That’s roughly how much unexpected mass we detected.”
https://futurism.com/the-byte/deep-structure-mass-moon-crater
Strange, this article seems to contradict that.
https://www.eaps.purdue.edu/news/articles/2020/092520_Trowbridge_Icarus.html
Spiny Norman said:
The Varnhem Humerus, a broken bone repaired with a copper plate, and shows signs of healing afterwards. From Varnhem, Västergötland. Dated between 1260 and 1527.
Health Risks from Excessive Copper Chronic exposure to high levels of copper can result in liver damage and gastrointestinal symptoms (e.g., abdominal pain, cramps, nausea, diarrhea, and vomiting) . Copper toxicity is rare in healthy individuals who do not have a hereditary copper homeostasis defect. Wiki
Kingy said:
Spiny Norman said:
A team of astronomers found a “large excess of mass” under the Moon’s largest crater, the Aitken basin — likely a relic from an ancient asteroid impact event, but perhaps something much stranger.“Imagine taking a pile of metal five times larger than the Big Island of Hawaii and burying it underground,” said lead author Peter B. James from Baylor University in Waco, Texas in a statement. “That’s roughly how much unexpected mass we detected.”
https://futurism.com/the-byte/deep-structure-mass-moon-crater
Strange, this article seems to contradict that.
https://www.eaps.purdue.edu/news/articles/2020/092520_Trowbridge_Icarus.html
Anything but metric.
Spiny Norman said:
A team of astronomers found a “large excess of mass” under the Moon’s largest crater, the Aitken basin — likely a relic from an ancient asteroid impact event, but perhaps something much stranger.“Imagine taking a pile of metal five times larger than the Big Island of Hawaii and burying it underground,” said lead author Peter B. James from Baylor University in Waco, Texas in a statement. “That’s roughly how much unexpected mass we detected.”
https://futurism.com/the-byte/deep-structure-mass-moon-crater
A crashed spaceship?
Michael V said:
Michael V said:
Spiny Norman said:
Living Photographs, photographs created by assembling sailors and soldiers, 1918.
rarehistoricalphotos.com/living-photographs-photographs-created-assembling-soldiers-1918
:)
Absolutely amazing!
+1
Spiny Norman said:
The Varnhem Humerus, a broken bone repaired with a copper plate, and shows signs of healing afterwards. From Varnhem, Västergötland. Dated between 1260 and 1527.
Tá sé sin iontach (That’s amazing!)
Why Some Roadways Are Made of Styrofoam.
The Lincoln Calibration Sphere 1, or LCS-1, is a large aluminium sphere in Earth orbit since 6 May 1965. It is still in use, having lasted for over 50 years. The sphere was launched along with the Lincoln Experimental Satellite-2 on a Titan IIIA. It is technically the oldest operational spacecraft , but it has no power supply or fuel; it is merely a passive metal sphere. LCS-1 has been used for radar calibration since its launch. It was built by Rohr. Corp. for the MIT Lincoln Laboratory.
LCS-1 is a hollow sphere 1.12 m (3 ft 8 in) in diameter with a wall thickness of 3.2 mm (0.13 in). The sphere was constructed from two hemispheres, made by spinning sheet metal over a mould. These hemispheres were fastened to an internal, circumferential hoop by 440 countersunk screws, then milled and polished. The initial finish had a surface roughness less than 10 micrometres and was expected to last for five years. Since its launch, I-band measurements have shown periodic deviations that likely correspond to one or more new surface irregularities.
Spiny Norman said:
The Lincoln Calibration Sphere 1, or LCS-1, is a large aluminium sphere in Earth orbit since 6 May 1965. It is still in use, having lasted for over 50 years. The sphere was launched along with the Lincoln Experimental Satellite-2 on a Titan IIIA. It is technically the oldest operational spacecraft , but it has no power supply or fuel; it is merely a passive metal sphere. LCS-1 has been used for radar calibration since its launch. It was built by Rohr. Corp. for the MIT Lincoln Laboratory.LCS-1 is a hollow sphere 1.12 m (3 ft 8 in) in diameter with a wall thickness of 3.2 mm (0.13 in). The sphere was constructed from two hemispheres, made by spinning sheet metal over a mould. These hemispheres were fastened to an internal, circumferential hoop by 440 countersunk screws, then milled and polished. The initial finish had a surface roughness less than 10 micrometres and was expected to last for five years. Since its launch, I-band measurements have shown periodic deviations that likely correspond to one or more new surface irregularities.
LAGEOS 1 is another passive spherical satellite still in use, launched in 1976. It reflects laser beams fired from different points on Earth, enabling very precise distance calculations. It and its twin LAGEOS 2 are both still in orbit.
>They both consist of a 24-inch (60 cm) aluminum-covered brass sphere that weighs between 882 pounds (400 kg) and 906 pounds (411 kg) for LAGEOS-1 and 2 respectively.
Amazingly, LAGEOS-1 has another “secret” mission once its current activities are complete. The satellite contains a small plaque designed by Carl Sagan that is intended to act as a kind of time capsule for future generations.
On it is a series of information including binary code, as well as diagrams showing how Earth’s continents appear in the past, today, and 8.4 million years in the future, the estimated lifetime of the LAGEOS spacecraft.
https://interestingengineering.com/science/oldest-undead-spacecraft
Rare Photos Reveal a Fake Rooftop Town Built to Hide Boeing’s Factory from Potential Japanese Air Strikes, 1944.
Spiny Norman said:
Rare Photos Reveal a Fake Rooftop Town Built to Hide Boeing’s Factory from Potential Japanese Air Strikes, 1944.
reading that, cheers
Spiny Norman said:
Rare Photos Reveal a Fake Rooftop Town Built to Hide Boeing’s Factory from Potential Japanese Air Strikes, 1944.
Ha, well done.
Bubblecar said:
Spiny Norman said:
Rare Photos Reveal a Fake Rooftop Town Built to Hide Boeing’s Factory from Potential Japanese Air Strikes, 1944.
Ha, well done.
The Japs would have still bombed the airstip and in those days the collateral damage would have taken out a fair proportion of the factory beside it.
This photo taken by Dr Cengiz Zabci, shows the amount of movement on the fault that caused the Turkey earthquake.
roughbarked said:
Bubblecar said:
Spiny Norman said:
Rare Photos Reveal a Fake Rooftop Town Built to Hide Boeing’s Factory from Potential Japanese Air Strikes, 1944.
Ha, well done.
The Japs would have still bombed the airstip and in those days the collateral damage would have taken out a fair proportion of the factory beside it.
They didn’t bomb any of it.
Bubblecar said:
roughbarked said:
Bubblecar said:Ha, well done.
The Japs would have still bombed the airstip and in those days the collateral damage would have taken out a fair proportion of the factory beside it.
They didn’t bomb any of it.
No but if they had been able to get that far….
Emotional intelligence: Why each of us should aspire to be more like Richard Feynman.
bigthink.com/neuropsych/richard-feynman-emotional-intelligence
Mazda Motor Corporation welders in Japan, made this bucket for the 32nd High Quality Metal Products Skill Fair.
These workers showed off their welding skill, making a one-millimeter metal dice with stainless-steel plates, with all their faces packed in meticulously.
Spiny Norman said:
Rare Photos Reveal a Fake Rooftop Town Built to Hide Boeing’s Factory from Potential Japanese Air Strikes, 1944.
Thanks.
Spiny Norman said:
Mazda Motor Corporation welders in Japan, made this bucket for the 32nd High Quality Metal Products Skill Fair.
These workers showed off their welding skill, making a one-millimeter metal dice with stainless-steel plates, with all their faces packed in meticulously.
There’s the story of a drill manufacturer which had a rivalry with a similar firm.
The manufacturer produced their finest, thinnest drill bit ever, and sent it to their rival to show them what they’d achieved.
The rival sent it back with a note that said ‘well done, very nice’.
This was not like them, and the manufacturer wondered what they were up to.
The sample drill bit was subjected to minute examination, which revealed that it was just as when it had been sent to the rival.
Except that it now had a hole drilled through its shaft.
Spiny Norman said:
Mazda Motor Corporation welders in Japan, made this bucket for the 32nd High Quality Metal Products Skill Fair.
These workers showed off their welding skill, making a one-millimeter metal dice with stainless-steel plates, with all their faces packed in meticulously.
DIE
captain_spalding said:
Spiny Norman said:
Mazda Motor Corporation welders in Japan, made this bucket for the 32nd High Quality Metal Products Skill Fair.
These workers showed off their welding skill, making a one-millimeter metal dice with stainless-steel plates, with all their faces packed in meticulously.
There’s the story of a drill manufacturer which had a rivalry with a similar firm.
The manufacturer produced their finest, thinnest drill bit ever, and sent it to their rival to show them what they’d achieved.
The rival sent it back with a note that said ‘well done, very nice’.
This was not like them, and the manufacturer wondered what they were up to.
The sample drill bit was subjected to minute examination, which revealed that it was just as when it had been sent to the rival.
Except that it now had a hole drilled through its shaft.
The nozzles used in 3D printers are predominantly 0.4 mmm diameter. Occasionally they get a bit clogged and one of the ways you can use to clear them is with a 0.4 mm drill bit. They look way smaller than 0.4 mm!
SCIENCE said:
Spiny Norman said:
Mazda Motor Corporation welders in Japan, made this bucket for the 32nd High Quality Metal Products Skill Fair.
These workers showed off their welding skill, making a one-millimeter metal dice with stainless-steel plates, with all their faces packed in meticulously.
DIE
Spiny Norman said:
This photo taken by Dr Cengiz Zabci, shows the amount of movement on the fault that caused the Turkey earthquake.
Ta.
Spiny Norman said:
captain_spalding said:
Spiny Norman said:
Mazda Motor Corporation welders in Japan, made this bucket for the 32nd High Quality Metal Products Skill Fair.
These workers showed off their welding skill, making a one-millimeter metal dice with stainless-steel plates, with all their faces packed in meticulously.
There’s the story of a drill manufacturer which had a rivalry with a similar firm.
The manufacturer produced their finest, thinnest drill bit ever, and sent it to their rival to show them what they’d achieved.
The rival sent it back with a note that said ‘well done, very nice’.
This was not like them, and the manufacturer wondered what they were up to.
The sample drill bit was subjected to minute examination, which revealed that it was just as when it had been sent to the rival.
Except that it now had a hole drilled through its shaft.
The nozzles used in 3D printers are predominantly 0.4 mmm diameter. Occasionally they get a bit clogged and one of the ways you can use to clear them is with a 0.4 mm drill bit. They look way smaller than 0.4 mm!
The company that does water jet cutting used to drop their diamond jets in for me to clean. I used white vinegar in the ultrasonic.
Tamb said:
SCIENCE said:Spiny Norman said:
Mazda Motor Corporation welders in Japan, made this bucket for the 32nd High Quality Metal Products Skill Fair.
These workers showed off their welding skill, making a one-millimeter metal dice with stainless-steel plates, with all their faces packed in meticulously.
DIE
That’s not a nice thing to say to a fellow forumer.
and he should apply the same grammar nazi to his own posts. ;)
Michael V said:
Spiny Norman said:
This photo taken by Dr Cengiz Zabci, shows the amount of movement on the fault that caused the Turkey earthquake.
Ta.
That’s a bit kinky for me.
Tamb said:
SCIENCE said:Spiny Norman said:
Mazda Motor Corporation welders in Japan, made this bucket for the 32nd High Quality Metal Products Skill Fair.
These workers showed off their welding skill, making a one-millimeter metal dice with stainless-steel plates, with all their faces packed in meticulously.
DIE
That’s not a nice thing to say to a fellow forumer.
that other fella made a meme version of it too
Spiny Norman said:
Emotional intelligence: Why each of us should aspire to be more like Richard Feynman.bigthink.com/neuropsych/richard-feynman-emotional-intelligence
Richard is dead, man!
Spiny Norman said:
captain_spalding said:
Spiny Norman said:
Mazda Motor Corporation welders in Japan, made this bucket for the 32nd High Quality Metal Products Skill Fair.
These workers showed off their welding skill, making a one-millimeter metal dice with stainless-steel plates, with all their faces packed in meticulously.
There’s the story of a drill manufacturer which had a rivalry with a similar firm.
The manufacturer produced their finest, thinnest drill bit ever, and sent it to their rival to show them what they’d achieved.
The rival sent it back with a note that said ‘well done, very nice’.
This was not like them, and the manufacturer wondered what they were up to.
The sample drill bit was subjected to minute examination, which revealed that it was just as when it had been sent to the rival.
Except that it now had a hole drilled through its shaft.
The nozzles used in 3D printers are predominantly 0.4 mmm diameter. Occasionally they get a bit clogged and one of the ways you can use to clear them is with a 0.4 mm drill bit. They look way smaller than 0.4 mm!
and then you have EDM.
JudgeMental said:
Spiny Norman said:
captain_spalding said:There’s the story of a drill manufacturer which had a rivalry with a similar firm.
The manufacturer produced their finest, thinnest drill bit ever, and sent it to their rival to show them what they’d achieved.
The rival sent it back with a note that said ‘well done, very nice’.
This was not like them, and the manufacturer wondered what they were up to.
The sample drill bit was subjected to minute examination, which revealed that it was just as when it had been sent to the rival.
Except that it now had a hole drilled through its shaft.
The nozzles used in 3D printers are predominantly 0.4 mmm diameter. Occasionally they get a bit clogged and one of the ways you can use to clear them is with a 0.4 mm drill bit. They look way smaller than 0.4 mm!
and then you have EDM.
Oh yeah. Amazing technology.
Actually this is a much better video of EDM.
Spiny Norman said:
Actually this is a much better video of EDM.
I heard that a lab in China drilled a hole in a proton.
captain_spalding said:
Spiny Norman said:
Mazda Motor Corporation welders in Japan, made this bucket for the 32nd High Quality Metal Products Skill Fair.
These workers showed off their welding skill, making a one-millimeter metal dice with stainless-steel plates, with all their faces packed in meticulously.
There’s the story of a drill manufacturer which had a rivalry with a similar firm.
The manufacturer produced their finest, thinnest drill bit ever, and sent it to their rival to show them what they’d achieved.
The rival sent it back with a note that said ‘well done, very nice’.
This was not like them, and the manufacturer wondered what they were up to.
The sample drill bit was subjected to minute examination, which revealed that it was just as when it had been sent to the rival.
Except that it now had a hole drilled through its shaft.
:)
Michael V said:
Spiny Norman said:
This photo taken by Dr Cengiz Zabci, shows the amount of movement on the fault that caused the Turkey earthquake.
Ta.
The only way I can reconcile that photo is: the fault is a sinistral strike-slip fault, almost parallel to the railway line.
Michael V said:
Michael V said:
Spiny Norman said:
This photo taken by Dr Cengiz Zabci, shows the amount of movement on the fault that caused the Turkey earthquake.
Ta.
The only way I can reconcile that photo is: the fault is a sinistral strike-slip fault, almost parallel to the railway line.
What about this one?:
The Rev Dodgson said:
Michael V said:
Michael V said:Ta.
The only way I can reconcile that photo is: the fault is a sinistral strike-slip fault, almost parallel to the railway line.
What about this one?:
Insufficient information. The photo was taken from within the zone of deformation looking out. So only one undeformed reference point.
The Sleeping Beauty Problem.
Michael V said:
The Rev Dodgson said:
Michael V said:The only way I can reconcile that photo is: the fault is a sinistral strike-slip fault, almost parallel to the railway line.
What about this one?:
Insufficient information. The photo was taken from within the zone of deformation looking out. So only one undeformed reference point.
It’s the 1968 Meckering Earthquake.
It looked a bit similar, to my inexpert eye.
Michael V said:
Michael V said:
Spiny Norman said:
This photo taken by Dr Cengiz Zabci, shows the amount of movement on the fault that caused the Turkey earthquake.
Ta.
The only way I can reconcile that photo is: the fault is a sinistral strike-slip fault, almost parallel to the railway line.
Sinistral strike-slip, definitely. Relative movement about 3 metres. Fantastic photo: fault displacement pretty much orthogonal to road, painted white line to help estimate distance and people for scale.
https://www.reddit.com/r/europe/comments/10wss6o/anatolian_plate_moved_335_meters_after_the/
Michael V said:
Michael V said:
Michael V said:Ta.
The only way I can reconcile that photo is: the fault is a sinistral strike-slip fault, almost parallel to the railway line.
Sinistral strike-slip, definitely. Relative movement about 3 metres. Fantastic photo: fault displacement pretty much orthogonal to road, painted white line to help estimate distance and people for scale.
https://www.reddit.com/r/europe/comments/10wss6o/anatolian_plate_moved_335_meters_after_the/
At least I got it and I’m neither a geologist nor engineer.
Michael V said:
Michael V said:
Michael V said:Ta.
The only way I can reconcile that photo is: the fault is a sinistral strike-slip fault, almost parallel to the railway line.
Sinistral strike-slip, definitely. Relative movement about 3 metres. Fantastic photo: fault displacement pretty much orthogonal to road, painted white line to help estimate distance and people for scale.
https://www.reddit.com/r/europe/comments/10wss6o/anatolian_plate_moved_335_meters_after_the/
Mother nature makes a mockery of the straight lines of humans.
party_pants said:
Michael V said:
Michael V said:The only way I can reconcile that photo is: the fault is a sinistral strike-slip fault, almost parallel to the railway line.
Sinistral strike-slip, definitely. Relative movement about 3 metres. Fantastic photo: fault displacement pretty much orthogonal to road, painted white line to help estimate distance and people for scale.
https://www.reddit.com/r/europe/comments/10wss6o/anatolian_plate_moved_335_meters_after_the/
Mother nature makes a mockery of the straight lines of humans.
Except in the case of the old Roman roads?
Michael V said:
Michael V said:
Michael V said:Ta.
The only way I can reconcile that photo is: the fault is a sinistral strike-slip fault, almost parallel to the railway line.
Sinistral strike-slip, definitely. Relative movement about 3 metres. Fantastic photo: fault displacement pretty much orthogonal to road, painted white line to help estimate distance and people for scale.
https://www.reddit.com/r/europe/comments/10wss6o/anatolian_plate_moved_335_meters_after_the/
Another great photo.
Michael V said:
Michael V said:
Michael V said:The only way I can reconcile that photo is: the fault is a sinistral strike-slip fault, almost parallel to the railway line.
Sinistral strike-slip, definitely. Relative movement about 3 metres. Fantastic photo: fault displacement pretty much orthogonal to road, painted white line to help estimate distance and people for scale.
https://www.reddit.com/r/europe/comments/10wss6o/anatolian_plate_moved_335_meters_after_the/
Another great photo.
That photo is heading to be more like the 100km slip that happened between Syria and Turkey. ye.
Michael V said:
Michael V said:
Michael V said:The only way I can reconcile that photo is: the fault is a sinistral strike-slip fault, almost parallel to the railway line.
Sinistral strike-slip, definitely. Relative movement about 3 metres. Fantastic photo: fault displacement pretty much orthogonal to road, painted white line to help estimate distance and people for scale.
https://www.reddit.com/r/europe/comments/10wss6o/anatolian_plate_moved_335_meters_after_the/
Another great photo.
Rightio. I take it that is the same bits of road and railway track in the same picture.
party_pants said:
Michael V said:
Michael V said:Sinistral strike-slip, definitely. Relative movement about 3 metres. Fantastic photo: fault displacement pretty much orthogonal to road, painted white line to help estimate distance and people for scale.
https://www.reddit.com/r/europe/comments/10wss6o/anatolian_plate_moved_335_meters_after_the/
Another great photo.
Rightio. I take it that is the same bits of road and railway track in the same picture.
It is a different photo of a different location.
Michael V said:
Michael V said:
Michael V said:The only way I can reconcile that photo is: the fault is a sinistral strike-slip fault, almost parallel to the railway line.
Sinistral strike-slip, definitely. Relative movement about 3 metres. Fantastic photo: fault displacement pretty much orthogonal to road, painted white line to help estimate distance and people for scale.
https://www.reddit.com/r/europe/comments/10wss6o/anatolian_plate_moved_335_meters_after_the/
Another great photo.
Good photos, it does very little damage or movement to the surface topography but kills thousands in poorly built dwellings.
For the herdsmen who lived in tents and the like thousands of years ago an earthquake would have been nothing more than an interesting occurrence.
Peak Warming Man said:
Michael V said:
Michael V said:Sinistral strike-slip, definitely. Relative movement about 3 metres. Fantastic photo: fault displacement pretty much orthogonal to road, painted white line to help estimate distance and people for scale.
https://www.reddit.com/r/europe/comments/10wss6o/anatolian_plate_moved_335_meters_after_the/
Another great photo.
Good photos, it does very little damage or movement to the surface topography but kills thousands in poorly built dwellings.
For the herdsmen who lived in tents and the like thousands of years ago an earthquake would have been nothing more than an interesting occurrence.
Other than the sheep that fell down the crack in the earth. The God’s must be appeased.
party_pants said:
Michael V said:
Michael V said:Sinistral strike-slip, definitely. Relative movement about 3 metres. Fantastic photo: fault displacement pretty much orthogonal to road, painted white line to help estimate distance and people for scale.
https://www.reddit.com/r/europe/comments/10wss6o/anatolian_plate_moved_335_meters_after_the/
Another great photo.
Rightio. I take it that is the same bits of road and railway track in the same picture.
Not the same road (no white lines, field is green, not ploughed and brown). I can’t make out any railway.
What I think is interesting about the third photo, is that it demonstrates that a fault is not a simple planar surface and can have quite large-scale roughness.
Michael V said:
party_pants said:
Michael V said:Another great photo.
Rightio. I take it that is the same bits of road and railway track in the same picture.
Not the same road (no white lines, field is green, not ploughed and brown). I can’t make out any railway.
What I think is interesting about the third photo, is that it demonstrates that a fault is not a simple planar surface and can have quite large-scale roughness.
Yes Michael. This I have oft observed.
Eiffel Tower under construction, 1887-1889.
In 1889, Paris hosted an Exposition Universelle (World’s Fair) to mark the 100-year anniversary of the French Revolution. More than 100 artists submitted competing plans for a monument to be built on the Champ-de-Mars, located in central Paris, and serve as the exposition’s entrance.
The commission was granted to Eiffel et Compagnie, a consulting and construction firm owned by the acclaimed bridge builder, architect, and metals expert Alexandre-Gustave Eiffel.
While Eiffel himself often receives full credit for the monument that bears his name, it was one of his employees—a structural engineer named Maurice Koechlin—who came up with and fine-tuned the concept.
The assembly of the supports began on July 1, 1887, and was completed twenty-two months later. All the elements were prepared in Eiffel’s factory located at Levallois-Perret on the outskirts of Paris.
Each of the 18,000 pieces used to construct the Tower were specifically designed and calculated, traced out to an accuracy of a tenth of a millimeter, and then put together forming new pieces around five metres each.
https://rarehistoricalphotos.com/eiffel-tower-construction/
FWIW when I was based in Paris for a while I walked through the city and had a good look at it. It’s a lot larger than it seems in the photos. I reckoned I could have flown a 747 through the base of it.
Spiny Norman said:
Eiffel Tower under construction, 1887-1889.In 1889, Paris hosted an Exposition Universelle (World’s Fair) to mark the 100-year anniversary of the French Revolution. More than 100 artists submitted competing plans for a monument to be built on the Champ-de-Mars, located in central Paris, and serve as the exposition’s entrance.
The commission was granted to Eiffel et Compagnie, a consulting and construction firm owned by the acclaimed bridge builder, architect, and metals expert Alexandre-Gustave Eiffel.
While Eiffel himself often receives full credit for the monument that bears his name, it was one of his employees—a structural engineer named Maurice Koechlin—who came up with and fine-tuned the concept.
The assembly of the supports began on July 1, 1887, and was completed twenty-two months later. All the elements were prepared in Eiffel’s factory located at Levallois-Perret on the outskirts of Paris.
Each of the 18,000 pieces used to construct the Tower were specifically designed and calculated, traced out to an accuracy of a tenth of a millimeter, and then put together forming new pieces around five metres each.
https://rarehistoricalphotos.com/eiffel-tower-construction/
FWIW when I was based in Paris for a while I walked through the city and had a good look at it. It’s a lot larger than it seems in the photos. I reckoned I could have flown a 747 through the base of it.
I’ve done a lot of steel detailing over the years, we never dimension anything smaller than a millimeter
The thermal characteristics of steel make anything smaller impractical.
Peak Warming Man said:
Spiny Norman said:
Eiffel Tower under construction, 1887-1889.In 1889, Paris hosted an Exposition Universelle (World’s Fair) to mark the 100-year anniversary of the French Revolution. More than 100 artists submitted competing plans for a monument to be built on the Champ-de-Mars, located in central Paris, and serve as the exposition’s entrance.
The commission was granted to Eiffel et Compagnie, a consulting and construction firm owned by the acclaimed bridge builder, architect, and metals expert Alexandre-Gustave Eiffel.
While Eiffel himself often receives full credit for the monument that bears his name, it was one of his employees—a structural engineer named Maurice Koechlin—who came up with and fine-tuned the concept.
The assembly of the supports began on July 1, 1887, and was completed twenty-two months later. All the elements were prepared in Eiffel’s factory located at Levallois-Perret on the outskirts of Paris.
Each of the 18,000 pieces used to construct the Tower were specifically designed and calculated, traced out to an accuracy of a tenth of a millimeter, and then put together forming new pieces around five metres each.
https://rarehistoricalphotos.com/eiffel-tower-construction/
FWIW when I was based in Paris for a while I walked through the city and had a good look at it. It’s a lot larger than it seems in the photos. I reckoned I could have flown a 747 through the base of it.
I’ve done a lot of steel detailing over the years, we never dimension anything smaller than a millimeter
The thermal characteristics of steel make anything smaller impractical.
Yeah I reckon so. And probably less important when using sheets of iron that are hot riveted.
Spiny Norman said:
Eiffel Tower under construction, 1887-1889.In 1889, Paris hosted an Exposition Universelle (World’s Fair) to mark the 100-year anniversary of the French Revolution. More than 100 artists submitted competing plans for a monument to be built on the Champ-de-Mars, located in central Paris, and serve as the exposition’s entrance.
The commission was granted to Eiffel et Compagnie, a consulting and construction firm owned by the acclaimed bridge builder, architect, and metals expert Alexandre-Gustave Eiffel.
While Eiffel himself often receives full credit for the monument that bears his name, it was one of his employees—a structural engineer named Maurice Koechlin—who came up with and fine-tuned the concept.
The assembly of the supports began on July 1, 1887, and was completed twenty-two months later. All the elements were prepared in Eiffel’s factory located at Levallois-Perret on the outskirts of Paris.
Each of the 18,000 pieces used to construct the Tower were specifically designed and calculated, traced out to an accuracy of a tenth of a millimeter, and then put together forming new pieces around five metres each.
https://rarehistoricalphotos.com/eiffel-tower-construction/
FWIW when I was based in Paris for a while I walked through the city and had a good look at it. It’s a lot larger than it seems in the photos. I reckoned I could have flown a 747 through the base of it.
The Eiffel Tower was sold twice in 1925 by a conman named Count Victor Lustig (the “Count” was self-applied); Lustig also conned $5000 out of Al Capone (and survived). His exploits are detailed in the book The Man who sold the Eiffel Tower, by the former FBI director James F. Johnson and Floyd Miller.
Nuclear Tourism: When atomic tests were a tourist attraction in Las Vegas, 1950s.
Las Vegas is known as the city of lights and, at one time, that light was the glow of an atomic detonation in the Nevada desert. Starting in 1951, the US Army began testing nuclear ordnances just 65 miles from Sin City.
At night, the glow of the bombs lit up the sky, and mushroom clouds could be spotted rising over the horizon during the day.
In classical American fashion, fear was not the only reaction. Vegas started becoming a destination for a certain type of people — Nuclear Tourists.
rarehistoricalphotos.com/atomic-tourism-las-vegas
Spiny Norman said:
In classical American fashion, fear was not the only reaction. Vegas started becoming a destination for a certain type of people — Nuclear Tourists.
rarehistoricalphotos.com/atomic-tourism-las-vegas
Probably all dreaming of the day that they could have some nukes of their own, tucked away in the basement, as guaranteed by the Second Amendment.
captain_spalding said:
Spiny Norman said:In classical American fashion, fear was not the only reaction. Vegas started becoming a destination for a certain type of people — Nuclear Tourists.
rarehistoricalphotos.com/atomic-tourism-las-vegas
Probably all dreaming of the day that they could have some nukes of their own, tucked away in the basement, as guaranteed by the Second Amendment.
Buy them in packs of ten for cracker night?
Yukka Flat, in Nevada. Each of those holes are from an underground nuclear test explosion.
The largest hole, Sedan Crater, is detailed here – “:https://en.wikipedia.org/wiki/Sedan_Crater”:https://en.wikipedia.org/wiki/Sedan_Crater
Spiny Norman said:
Yukka Flat, in Nevada. Each of those holes are from an underground nuclear test explosion.
The largest hole, Sedan Crater, is detailed here – “:https://en.wikipedia.org/wiki/Sedan_Crater”:https://en.wikipedia.org/wiki/Sedan_Crater
Percentage (%) of the population in which the frequency of cancer is measured on each continent in children (age 0-14 years) and adolescents (age 15-19 years)
sarahs mum said:
Spiny Norman said:
Yukka Flat, in Nevada. Each of those holes are from an underground nuclear test explosion.
The largest hole, Sedan Crater, is detailed here – “:https://en.wikipedia.org/wiki/Sedan_Crater”:https://en.wikipedia.org/wiki/Sedan_Crater
Percentage (%) of the population in which the frequency of cancer is measured on each continent in children (age 0-14 years) and adolescents (age 15-19 years)
This confuses me.
sarahs mum said:
Spiny Norman said:
Yukka Flat, in Nevada. Each of those holes are from an underground nuclear test explosion.
The largest hole, Sedan Crater, is detailed here – “:https://en.wikipedia.org/wiki/Sedan_Crater”:https://en.wikipedia.org/wiki/Sedan_Crater
Percentage (%) of the population in which the frequency of cancer is measured on each continent in children (age 0-14 years) and adolescents (age 15-19 years)
sarahs mum said:
Spiny Norman said:
Yukka Flat, in Nevada. Each of those holes are from an underground nuclear test explosion.
The largest hole, Sedan Crater, is detailed here – “:https://en.wikipedia.org/wiki/Sedan_Crater”:https://en.wikipedia.org/wiki/Sedan_Crater
Percentage (%) of the population in which the frequency of cancer is measured on each continent in children (age 0-14 years) and adolescents (age 15-19 years)
Spiny Norman said:
Yukka Flat, in Nevada. Each of those holes are from an underground nuclear test explosion.
The largest hole, Sedan Crater, is detailed here – “:https://en.wikipedia.org/wiki/Sedan_Crater”:https://en.wikipedia.org/wiki/Sedan_Crater
I watched a doco on TV a few weeks back in the wee hours of the morning. Discussing the difference between people born prior to the nuclear period in history and the global populations of today. The way the nuclear fall out travelled across vast distances through the air and some such from ground zero and how that was grossly underestimated.
I think the Australian film about Maralinga for example, suggested the scientists concerns were being muffled well before the general public were are aware of the true dangers. And over in the pacific regions , the amount of people with radiation poisoning as consequence of the radiation travelling vast distances
monkey skipper said:
Spiny Norman said:
Yukka Flat, in Nevada. Each of those holes are from an underground nuclear test explosion.
The largest hole, Sedan Crater, is detailed here – “:https://en.wikipedia.org/wiki/Sedan_Crater”:https://en.wikipedia.org/wiki/Sedan_Crater
I watched a doco on TV a few weeks back in the wee hours of the morning. Discussing the difference between people born prior to the nuclear period in history and the global populations of today. The way the nuclear fall out travelled across vast distances through the air and some such from ground zero and how that was grossly underestimated.
I think the Australian film about Maralinga for example, suggested the scientists concerns were being muffled well before the general public were are aware of the true dangers. And over in the pacific regions , the amount of people with radiation poisoning as consequence of the radiation travelling vast distances
Fallout is the strange but true story of a celebrated Australian scientist’s involvement in the 1956 British atomic bomb tests. Hedley Marston, an idol with his own feet of clay, was determined not only to reveal official lies and chicanery, but to expose as charlatans the Australian scientists who were appointed to protect the nation from any possible harm. Contrary to official pronouncements, radioactive fallout was blowing across the country and contaminating many towns and communities, including Marston’s beloved Adelaide. The dispute that ensued was perhaps the most acrimonious in the history of Australian science.
Fallout tells us much about the nature of science and our society. It is about science in service of the bomb, and in service of self. Roger Cross tells a story that must make us ask the alarming question: could we be fooled again?
https://www.amazon.com/Fallout-Hedley-Marston-Atomic-Australia/dp/1459643461
a good read.
Radioactive Fallout From Nuclear Weapons Testing
Radiation Facts
After a nuclear explosion, debris and soil can mix with radionuclides. This mixture is sent up into the air and then falls back to Earth. It is called fallout and it typically contains hundreds of different radionuclides.
Since the conclusion of the weapons testing in the 1980s, radionuclides in the atmosphere have largely decayed away.
Detonating nuclear weapons above ground sends radioactive materials as high as 50 miles into the atmosphere. Large particles fall to the ground near the explosion-site, but lighter particles and gases travel into the upper atmosphere. The particles that are swept up into the atmosphere and fall back down to Earth are called fallout. Fallout can circulate around the world for years until it gradually falls down to Earth or is brought back to the surface by precipitation. The path of the fallout depends on wind and weather patterns.
About Radioactive Fallout From Nuclear Weapons Testing
Fallout typically contains hundreds of different radionuclides. Some stay in the environment for a long time because they have long half-lives, like cesium-137, which has a half-life of 30.17 years. Some have very short half-lives and decay away in a few minutes or a few days, like iodine-131, which has a half-life of 8 days. Very little radioactivity from weapons testing in the 1950s and 1960s can still be detected in the environment now.
The United States conducted the first above-ground nuclear weapon test in southeastern New Mexico on July 16, 1945. Between 1945 and 1963, hundreds of above-ground blasts took place around the world. Over time the number and size (or yield) of these blasts increased, especially in the late 1950s and early 1960s. After the Limited Test Ban Treaty of 1963 was signed by the United States, the Soviet Union and Great Britain, most above-ground blasts ceased. Some above-ground weapons testing by other countries continued until 1980. Since the end of above-ground nuclear weapons testing, the day-to-day radiation in air readings from monitoring sites has fallen. For many years, analysis of air samples has shown risk levels far below regulatory limits. In fact, results are now generally below-levels that instruments can detect.
The EPA maintains a system of radiation monitors throughout the United States. These monitors were originally designed to detect radionuclides that were released after a nuclear weapon detonation. Now, the EPA uses this system, called RadNet, to look at background radiation levels at many locations across the United States. Background radiation is around us all the time, mostly from natural sources, like naturally-occurring radon and uranium. For more information about the history of RadNet, please visit the Learn About RadNet webpage.
Some of the fallout radionuclides the EPA’s monitoring systems may detect include:
Americium-241
Cesium-137
Iodine-131
Strontium-90
Even though there is very little fallout that still exists in the environment, it is important to remember that fallout can be very dangerous. This section talks about the different ways we can be exposed to radiation if a nuclear detonation occurs.
When a nuclear detonation occurs, people, plants, and animals can be exposed to the fallout in several ways. Livestock may eat contaminated plants or drink contaminated water. People who then eat this livestock will then still experience internal contamination, in which radioactive material ends up inside of our bodies, despite not consuming contaminated plants or water directly.
Radionuclides that are inhaled or ingested are not blocked by an external shield. These radionuclides interact with internal cells and tissues, which increases the risk of harmful health effects. When radionuclides are ingested, they can change the structure of cells, which is one of the ways people can develop cancer. The health risks from fallout have been described in many studies. One example is the Federal Radiation Council’s 1962 report, Health Implications of Fallout from Nuclear Weapons Testing through 1961. This is one of the reasons why radiation protection professionals work hard to protect people from unnecessary exposure to radiation.
The radioactive dust that settles on the environment around us is an example of potential external exposure. Radionuclides that emit alpha and beta particles would pose a lower external exposure threat because they do not travel very far in the atmosphere and are not as penetrating as more energetic radiation. Shielding, one of the three principles of radiation protection, prevents some external exposure because alpha particles are blocked by the dead skin cells that sit on the surface of our bodies. Gamma rays, however, travel much farther in the atmosphere, and are higher energy rays that can only be blocked by heavy shielding, like a concrete wall or a lead apron. These rays pose a higher external exposure risk.
ChrispenEvan said:
monkey skipper said:
Spiny Norman said:
Yukka Flat, in Nevada. Each of those holes are from an underground nuclear test explosion.
The largest hole, Sedan Crater, is detailed here – “:https://en.wikipedia.org/wiki/Sedan_Crater”:https://en.wikipedia.org/wiki/Sedan_Crater
I watched a doco on TV a few weeks back in the wee hours of the morning. Discussing the difference between people born prior to the nuclear period in history and the global populations of today. The way the nuclear fall out travelled across vast distances through the air and some such from ground zero and how that was grossly underestimated.
I think the Australian film about Maralinga for example, suggested the scientists concerns were being muffled well before the general public were are aware of the true dangers. And over in the pacific regions , the amount of people with radiation poisoning as consequence of the radiation travelling vast distances
Fallout is the strange but true story of a celebrated Australian scientist’s involvement in the 1956 British atomic bomb tests. Hedley Marston, an idol with his own feet of clay, was determined not only to reveal official lies and chicanery, but to expose as charlatans the Australian scientists who were appointed to protect the nation from any possible harm. Contrary to official pronouncements, radioactive fallout was blowing across the country and contaminating many towns and communities, including Marston’s beloved Adelaide. The dispute that ensued was perhaps the most acrimonious in the history of Australian science.
Fallout tells us much about the nature of science and our society. It is about science in service of the bomb, and in service of self. Roger Cross tells a story that must make us ask the alarming question: could we be fooled again?https://www.amazon.com/Fallout-Hedley-Marston-Atomic-Australia/dp/1459643461
a good read.
And another thing that was interesting in that documentary was a journo comparing some rock art with the stories of the ancestors of some indigenous country in Australia which is known to have the largest deposit of uranium. The rule of their country is not to dig in any part of their country as it will wake a spirit of fire. The journo also noticed that some of the rock art shows ancestors with large growths on their bodies coincidentally just like what can be seen in people who are gravely ill with radiation poisoning.
A steam engine boiler got just a wee bit too much pressure and blew itself apart.
Or Cthulhu is trying to escape.
Spiny Norman said:
A steam engine boiler got just a wee bit too much pressure and blew itself apart.
Or Cthulhu is trying to escape.
Looks like it blew the head off the exchanger.
That’s what good Yorkshire coal can do.
Spiny Norman said:
A steam engine boiler got just a wee bit too much pressure and blew itself apart.
Or Cthulhu is trying to escape.
It go KABOOM!
Soyuz “Globus” Mechanical Navigation Computer.
We open up a Soyuz INK “Globus” analog mechanical navigation computer. It’s full of gears and incredibly gorgeous, and in our case, somewhat broken.
Why the US Gov Reshapes the Mississippi River.
This Gun Could Reach Space
Happy 95th Birthday to ‘Hans im Gluck’ (Lucky Hans) Hans Herrmann, Formula One and Sports car driver from Stuttgart, Germany, who took the first overall win at Le Mans for Porsche in 1970, driving a Porsche 917.
Remarkably, Herrmann walked away virtually unhurt after one of the most spectacular crashes in Grand Prix history, when his BRM P25 cartwheeled down the track at Avus in 1959, shedding components, one being Hans himself.
Spiny Norman said:
Happy 95th Birthday to ‘Hans im Gluck’ (Lucky Hans) Hans Herrmann, Formula One and Sports car driver from Stuttgart, Germany, who took the first overall win at Le Mans for Porsche in 1970, driving a Porsche 917.
Remarkably, Herrmann walked away virtually unhurt after one of the most spectacular crashes in Grand Prix history, when his BRM P25 cartwheeled down the track at Avus in 1959, shedding components, one being Hans himself.
Always a good thing when the car rolls away from you.
Spiny Norman said:
Happy 95th Birthday to ‘Hans im Gluck’ (Lucky Hans) Hans Herrmann, Formula One and Sports car driver from Stuttgart, Germany, who took the first overall win at Le Mans for Porsche in 1970, driving a Porsche 917.
Remarkably, Herrmann walked away virtually unhurt after one of the most spectacular crashes in Grand Prix history, when his BRM P25 cartwheeled down the track at Avus in 1959, shedding components, one being Hans himself.
Gosh. What a photo.
Michael V said:
Spiny Norman said:
Happy 95th Birthday to ‘Hans im Gluck’ (Lucky Hans) Hans Herrmann, Formula One and Sports car driver from Stuttgart, Germany, who took the first overall win at Le Mans for Porsche in 1970, driving a Porsche 917.
Remarkably, Herrmann walked away virtually unhurt after one of the most spectacular crashes in Grand Prix history, when his BRM P25 cartwheeled down the track at Avus in 1959, shedding components, one being Hans himself.
Gosh. What a photo.
And they say that ‘seatbelts save lives’!
captain_spalding said:
Michael V said:
Spiny Norman said:
Happy 95th Birthday to ‘Hans im Gluck’ (Lucky Hans) Hans Herrmann, Formula One and Sports car driver from Stuttgart, Germany, who took the first overall win at Le Mans for Porsche in 1970, driving a Porsche 917.
Remarkably, Herrmann walked away virtually unhurt after one of the most spectacular crashes in Grand Prix history, when his BRM P25 cartwheeled down the track at Avus in 1959, shedding components, one being Hans himself.
Gosh. What a photo.
And they say that ‘seatbelts save lives’!
Seatbelt and roll-cage would though.
Michael V said:
captain_spalding said:
Michael V said:Gosh. What a photo.
And they say that ‘seatbelts save lives’!
Seatbelt and roll-cage would though.
Yes, roll-cages are the most sensible addition to racing cars ever, i think.
I do remember reading Jack Brabham’s autobiography in which he mentioned that the methanol fuel they used burned with a clear flame, and he told of an occasion where his car ended up inverted with him held in the seat by his harness, and him wondering ‘am i on fire?’, because he wouldn’t be able to see the flames if they were there.
captain_spalding said:
Michael V said:
captain_spalding said:And they say that ‘seatbelts save lives’!
Seatbelt and roll-cage would though.
Yes, roll-cages are the most sensible addition to racing cars ever, i think.
I do remember reading Jack Brabham’s autobiography in which he mentioned that the methanol fuel they used burned with a clear flame, and he told of an occasion where his car ended up inverted with him held in the seat by his harness, and him wondering ‘am i on fire?’, because he wouldn’t be able to see the flames if they were there.
Methanol has a pale blue flame colour, but for some it can be difficult to see in the day time. For some reason (possibly my poor red-green colour vision) I can see methanol flames reasonably well.
Michael V said:
Methanol has a pale blue flame colour, but for some it can be difficult to see in the day time. For some reason (possibly my poor red-green colour vision) I can see methanol flames reasonably well.
Gosh, did you find the red/green thing a disadvantage at all in your aviation career?
captain_spalding said:
Michael V said:Methanol has a pale blue flame colour, but for some it can be difficult to see in the day time. For some reason (possibly my poor red-green colour vision) I can see methanol flames reasonably well.
Gosh, did you find the red/green thing a disadvantage at all in your aviation career?
I didn’t find it a disadvantage at all, considering I didn’t have an aviation career.
It was a disadvantage at times with my geology career though.
Michael V said:
captain_spalding said:
Michael V said:Methanol has a pale blue flame colour, but for some it can be difficult to see in the day time. For some reason (possibly my poor red-green colour vision) I can see methanol flames reasonably well.
Gosh, did you find the red/green thing a disadvantage at all in your aviation career?
I didn’t find it a disadvantage at all, considering I didn’t have an aviation career.
It was a disadvantage at times with my geology career though.
Oops, sorry MV, i thought i was talking to Bill there!
Yes, i expect it would have been a difficulty for you. Hard to think of a career where it wouldn’t at least occasionally cause difficulty.
captain_spalding said:
Michael V said:
captain_spalding said:And they say that ‘seatbelts save lives’!
Seatbelt and roll-cage would though.
Yes, roll-cages are the most sensible addition to racing cars ever, i think.
I do remember reading Jack Brabham’s autobiography in which he mentioned that the methanol fuel they used burned with a clear flame, and he told of an occasion where his car ended up inverted with him held in the seat by his harness, and him wondering ‘am i on fire?’, because he wouldn’t be able to see the flames if they were there.
One of the potentially worst accidents he had was when he went off in a corner and for ‘safety’ the track had put a series of fences in a ring following the curve. The problem was not that they didn’t stop the car – they did – but the car also rolled and neatly wrapped itself up with lots of fencing wire, thus trapping Jack in the car until he could be cut loose. And yes, there was petrol leaking out of it.
Spiny Norman said:
captain_spalding said:
Michael V said:Seatbelt and roll-cage would though.
Yes, roll-cages are the most sensible addition to racing cars ever, i think.
I do remember reading Jack Brabham’s autobiography in which he mentioned that the methanol fuel they used burned with a clear flame, and he told of an occasion where his car ended up inverted with him held in the seat by his harness, and him wondering ‘am i on fire?’, because he wouldn’t be able to see the flames if they were there.
One of the potentially worst accidents he had was when he went off in a corner and for ‘safety’ the track had put a series of fences in a ring following the curve. The problem was not that they didn’t stop the car – they did – but the car also rolled and neatly wrapped itself up with lots of fencing wire, thus trapping Jack in the car until he could be cut loose. And yes, there was petrol leaking out of it.
That was probably the occasion he mentioned/i recall.
Another thing that i remember from that autobiography was Jack’s declaration that good racing mechanics don’t often make good racing drivers, because they’re always conscious of the limitations of, and the stresses on, the mechanical functions of engine and car.
For that reason, he said, they’re often reluctant to push the machinery to 100% of its capability.
Nothing much has changed. :)
Spiny Norman said:
Nothing much has changed. :)
Uncouth lot those dirt track racers.
Spiny Norman said:
Nothing much has changed. :)
‘Chuck you, too, Farley!’
Laser scans reveal ancient cities hidden in the Amazon river basin.
The architecture and infrastructure found may well have required the greatest amount of skilled labor of any construction from the same time period in the entire continent.
I’m very impressed that the car can fly, even will all its wings removed.
Spiny Norman said:
I’m very impressed that the car can fly, even will all its wings removed.
Can fly but it cannot be steered.
A mine collapse in China. Faaark!!!
Measuring the Speed of Light Throughout History
Simple Fractal rendering.
Spiny Norman said:
Simple Fractal rendering.
Interesting, but I wish people wouldn’t do stuff like this in youtube videos.
The Rev Dodgson said:
Spiny Norman said:
Simple Fractal rendering.Interesting, but I wish people wouldn’t do stuff like this in youtube videos.
You mean post videos rather than write articles? I prefer the written word more than anyone but I think for something as visually pertinent as fractals I’ll make an exception.
Witty Rejoinder said:
The Rev Dodgson said:
Spiny Norman said:
Simple Fractal rendering.Interesting, but I wish people wouldn’t do stuff like this in youtube videos.
You mean post videos rather than write articles? I prefer the written word more than anyone but I think for something as visually pertinent as fractals I’ll make an exception.
If it was just showing some pretty pictures a video is fine, but this is talking about how to generate the pretty pictures, including some code samples, so text with some embedded animations would be much easier to follow.
The Rev Dodgson said:
Witty Rejoinder said:
The Rev Dodgson said:Interesting, but I wish people wouldn’t do stuff like this in youtube videos.
You mean post videos rather than write articles? I prefer the written word more than anyone but I think for something as visually pertinent as fractals I’ll make an exception.
If it was just showing some pretty pictures a video is fine, but this is talking about how to generate the pretty pictures, including some code samples, so text with some embedded animations would be much easier to follow.
True.
imagine one size fits all digital media
An engineering channel, he does amazing work repairing & building new parts for mostly earth-moving gear.
Spiny Norman said:
An engineering channel, he does amazing work repairing & building new parts for mostly earth-moving gear.
Long time fan.
ChrispenEvan said:
Spiny Norman said:
An engineering channel, he does amazing work repairing & building new parts for mostly earth-moving gear.Long time fan.
Their factory is not too far up the road from me, I keep meaning to drop in to say gidday and thanks for the great vids.
Spiny Norman said:
ChrispenEvan said:
Spiny Norman said:
An engineering channel, he does amazing work repairing & building new parts for mostly earth-moving gear.Long time fan.
Their factory is not too far up the road from me, I keep meaning to drop in to say gidday and thanks for the great vids.
do it. I learn a lot from his videos, not that i’ll ever use it. he is very diligent.
The fastest thing that humans have ever made – A manhole cover.
A manhole cover launched into space with a nuclear test is the fastest human-made object. A scientist on Operation Plumbbob told us the unbelievable story.
https://www.yahoo.com/news/manhole-cover-launched-space-nuclear-010358106.html
Spiny Norman said:
The fastest thing that humans have ever made – A manhole cover.A manhole cover launched into space with a nuclear test is the fastest human-made object. A scientist on Operation Plumbbob told us the unbelievable story.
https://www.yahoo.com/news/manhole-cover-launched-space-nuclear-010358106.html
I’m surprised it wasn’t just vaporised.
Bubblecar said:
Spiny Norman said:
The fastest thing that humans have ever made – A manhole cover.A manhole cover launched into space with a nuclear test is the fastest human-made object. A scientist on Operation Plumbbob told us the unbelievable story.
https://www.yahoo.com/news/manhole-cover-launched-space-nuclear-010358106.html
I’m surprised it wasn’t just vaporised.
Me too, but it was about 100 mm thick and was in the atmosphere for such a short time it should largely be intact.
Spiny Norman said:
The fastest thing that humans have ever made – A manhole cover.A manhole cover launched into space with a nuclear test is the fastest human-made object. A scientist on Operation Plumbbob told us the unbelievable story.
https://www.yahoo.com/news/manhole-cover-launched-space-nuclear-010358106.html
Huh!
Michael V said:
Spiny Norman said:
The fastest thing that humans have ever made – A manhole cover.A manhole cover launched into space with a nuclear test is the fastest human-made object. A scientist on Operation Plumbbob told us the unbelievable story.
https://www.yahoo.com/news/manhole-cover-launched-space-nuclear-010358106.html
Huh!
didn’t Karl use to tell us about these things all the time
SCIENCE said:
Michael V said:
Spiny Norman said:
The fastest thing that humans have ever made – A manhole cover.A manhole cover launched into space with a nuclear test is the fastest human-made object. A scientist on Operation Plumbbob told us the unbelievable story.
https://www.yahoo.com/news/manhole-cover-launched-space-nuclear-010358106.html
Huh!
didn’t Karl use to tell us about these things all the time
I have no idea.
Michael V said:
SCIENCE said:
Michael V said:
Huh!
didn’t Karl use to tell us about these things all the time
I have no idea.
SCIENCE said:
Michael V said:
SCIENCE said:
didn’t Karl use to tell us about these things all the time
I have no idea.
Well there you go.
Michael V said:
SCIENCE said:
Michael V said:Huh!
didn’t Karl use to tell us about these things all the time
I have no idea.
Yeah this was a popular bit of scuttlebutt in the 1990s and Karl did a segment on it.
It was also debunked some 20 years ago. Here’s a piece on that.
https://gizmodo.com/no-a-nuclear-explosion-did-not-launch-a-manhole-cover-1715340946
dv said:
Michael V said:
SCIENCE said:
didn’t Karl use to tell us about these things all the time
I have no idea.
Yeah this was a popular bit of scuttlebutt in the 1990s and Karl did a segment on it.
It was also debunked some 20 years ago. Here’s a piece on that.
https://gizmodo.com/no-a-nuclear-explosion-did-not-launch-a-manhole-cover-1715340946
yes maybe but still
How fast did it go?
SCIENCE said:
dv said:
Michael V said:
I have no idea.
Yeah this was a popular bit of scuttlebutt in the 1990s and Karl did a segment on it.
It was also debunked some 20 years ago. Here’s a piece on that.
https://gizmodo.com/no-a-nuclear-explosion-did-not-launch-a-manhole-cover-1715340946
yes maybe but still
How fast did it go?
“Six times the escape velocity of the earth”
It is this estimate of its initial speed that started the furphy.
I suppose we can make some bote calcs re the decel.
900 kg.
67000 m/s.
A = 1.125 m^2
rho = 1.3 kg/m^3
drag coefficient = 1.15 ?
F = 1.3 * 1.15 * 1.125 * 67000^2 /2 =
1.33 GN
This thing would have an initial deceleration of around 1500000 m/s.
Small metal caps don’t have the aerodynamics for space travel. It would have either been destroyed, or slowed to an ordinary kind of speed almost instantly.
dv said:
I suppose we can make some bote calcs re the decel.900 kg.
67000 m/s.
A = 1.125 m^2
rho = 1.3 kg/m^3
drag coefficient = 1.15 ?F = 1.3 * 1.15 * 1.125 * 67000^2 /2 =
1.33 GN
This thing would have an initial deceleration of around 1500000 m/s.
Small metal caps don’t have the aerodynamics for space travel. It would have either been destroyed, or slowed to an ordinary kind of speed almost instantly.
You sure of your units there?
Ian said:
You sure of your units there?
I gratefully welcome correction.
New York Central’s Jet-Powered High Speed Train
Spiny Norman said:
New York Central’s Jet-Powered High Speed Train
For those wh prefer to read :)
(hadn’t heard of that before)
The Rev Dodgson said:
Spiny Norman said:New York Central’s Jet-Powered High Speed Train
For those wh prefer to read :)
(hadn’t heard of that before)
High speed trains are fascinating.
The world record for a conventional wheeled passenger train is held by France’s TGV (Train à Grande Vitesse), set in 2007 when it reached 574.8 km/h (357.2 mph) on a 140 km (87 mi) section of track.
Japan’s experimental maglev train L0 Series achieved 603 km/h (375 mph) on a 42.8 km magnetic levitation track in 2015.
Tamb said:
The Rev Dodgson said:
Spiny Norman said:New York Central’s Jet-Powered High Speed Train
For those wh prefer to read :)
(hadn’t heard of that before)
High speed trains are fascinating.
The world record for a conventional wheeled passenger train is held by France’s TGV (Train à Grande Vitesse), set in 2007 when it reached 574.8 km/h (357.2 mph) on a 140 km (87 mi) section of track.Japan’s experimental maglev train L0 Series achieved 603 km/h (375 mph) on a 42.8 km magnetic levitation track in 2015.
Yes, a subject that I find very fascinating too. Such a shame we can’t do it in Aus.
party_pants said:
Tamb said:
The Rev Dodgson said:For those wh prefer to read :)
(hadn’t heard of that before)
High speed trains are fascinating.
The world record for a conventional wheeled passenger train is held by France’s TGV (Train à Grande Vitesse), set in 2007 when it reached 574.8 km/h (357.2 mph) on a 140 km (87 mi) section of track.Japan’s experimental maglev train L0 Series achieved 603 km/h (375 mph) on a 42.8 km magnetic levitation track in 2015.
Yes, a subject that I find very fascinating too. Such a shame we can’t do it in Aus.
It has been oft discussed but has never eventuated.
party_pants said:
Tamb said:
The Rev Dodgson said:For those wh prefer to read :)
(hadn’t heard of that before)
High speed trains are fascinating.
The world record for a conventional wheeled passenger train is held by France’s TGV (Train à Grande Vitesse), set in 2007 when it reached 574.8 km/h (357.2 mph) on a 140 km (87 mi) section of track.Japan’s experimental maglev train L0 Series achieved 603 km/h (375 mph) on a 42.8 km magnetic levitation track in 2015.
Yes, a subject that I find very fascinating too. Such a shame we can’t do it in Aus.
roughbarked said:
party_pants said:
Tamb said:High speed trains are fascinating.
The world record for a conventional wheeled passenger train is held by France’s TGV (Train à Grande Vitesse), set in 2007 when it reached 574.8 km/h (357.2 mph) on a 140 km (87 mi) section of track.Japan’s experimental maglev train L0 Series achieved 603 km/h (375 mph) on a 42.8 km magnetic levitation track in 2015.
Yes, a subject that I find very fascinating too. Such a shame we can’t do it in Aus.
It has been oft discussed but has never eventuated.
The distances between major cities in Australia is just too great. Fast rail has a commercial sweet-spot for journeys up to about 500 km. Australia’s largest cities are all about 1000 km apart, with not much in between them. It won’t work commercially. The capital cost of building all that track is too great to make any financial return just on ticket sales. What Australia needs is a technological revolution in track construction. The trains and signalling etc exist already, that’s the easy bit.
Tamb said:
party_pants said:
Tamb said:High speed trains are fascinating.
The world record for a conventional wheeled passenger train is held by France’s TGV (Train à Grande Vitesse), set in 2007 when it reached 574.8 km/h (357.2 mph) on a 140 km (87 mi) section of track.Japan’s experimental maglev train L0 Series achieved 603 km/h (375 mph) on a 42.8 km magnetic levitation track in 2015.
Yes, a subject that I find very fascinating too. Such a shame we can’t do it in Aus.
Passenger density is too low to be economical.
Melbourne-Sydney is one of the busiest air-routes in the world so it would be feasible for HSR if they could take some of that market but it would have to be built quickly and expensively to be viable and not haphazardly so over 20-30 years.
roughbarked said:
party_pants said:
Tamb said:High speed trains are fascinating.
The world record for a conventional wheeled passenger train is held by France’s TGV (Train à Grande Vitesse), set in 2007 when it reached 574.8 km/h (357.2 mph) on a 140 km (87 mi) section of track.Japan’s experimental maglev train L0 Series achieved 603 km/h (375 mph) on a 42.8 km magnetic levitation track in 2015.
Yes, a subject that I find very fascinating too. Such a shame we can’t do it in Aus.
It has been oft discussed but has never eventuated.
It’s a handy thing to bring up now and then, when some ‘consulting’ firm needs to make an easy couple of million out of ‘feasibility studies’.
captain_spalding said:
roughbarked said:
party_pants said:Yes, a subject that I find very fascinating too. Such a shame we can’t do it in Aus.
It has been oft discussed but has never eventuated.
It’s a handy thing to bring up now and then, when some ‘consulting’ firm needs to make an easy couple of million out of ‘feasibility studies’.
The Sydney to Melbourne route is one of the top 5 busiest air routes in the world. It is possible that as avgas becomes more expensive compared to electricity, the economics of HSR will become more favourable compared to air travel, but that point is probably several decades off. I think it would make sense for governments to make long term plans for the high speed rail link (in terms of land acquisitions).
The Rev Dodgson said:
Spiny Norman said:New York Central’s Jet-Powered High Speed Train
For those wh prefer to read :)
(hadn’t heard of that before)
J-47 turbojets.
Same as the Boeing B-47 bomber, and North American’s F-86 Sabres.
And Chrysler had a turbine-powered car, with an engine of their own making:
https://en.wikipedia.org/wiki/Chrysler_Turbine_Car
The A-831 could operate on diesel fuel, unleaded gasoline, kerosene, and JP-4 jet fuel;] leaded gasoline damaged it. According to Chrysler, it could burn a variety of unusual fuels ranging from furnace oil and perfume to peanut and soybean oils.
So you can see it wouldn’t be a popular innovation with the oil companies.
party_pants said:
roughbarked said:
party_pants said:Yes, a subject that I find very fascinating too. Such a shame we can’t do it in Aus.
It has been oft discussed but has never eventuated.
The distances between major cities in Australia is just too great. Fast rail has a commercial sweet-spot for journeys up to about 500 km. Australia’s largest cities are all about 1000 km apart, with not much in between them. It won’t work commercially. The capital cost of building all that track is too great to make any financial return just on ticket sales. What Australia needs is a technological revolution in track construction. The trains and signalling etc exist already, that’s the easy bit.
When I returned from Turkey to work in Canberra in 1991 the Sydney-Melbourne VFT was the next big thing that we were all going to work on, but as you say, no-one could get it to work.
OTOH, Newcastle-Wollongong would be a fraction of the cost, and would potentially carry far more passengers, so I don’t know why we aren’t working on that.
dv said:
The Sydney to Melbourne route is one of the top 5 busiest air routes in the world. It is possible that as avgas becomes more expensive compared to electricity, the economics of HSR will become more favourable compared to air travel, but that point is probably several decades off. I think it would make sense for governments to make long term plans for the high speed rail link (in terms of land acquisitions).
I think it would be great if governments decided to start building new cities, or redeveloping existing cities, along to route to take pressure off the continuing urban sprawl of Melbourne and Sydney. Albury-Wodonga has been talked about for decades as being the target for regional development.
Regional development will need to go hand in hand with high speed rail.
But these things will require up-front investment, with the right set of policy settings intended to boost regional development and away from urban sprawl. It is going to be very difficult to model, and you can’t really do any convincing cost-benefit analysis. Then you’ll get the NIMBYs who want to block it for the sake of it.
Then there’s the environmental question – a direct HSR link between Sydney – Canberra – Melbourne (the most logical starting point) will need to bash and crash through some national parks along the way.
I like this construction method they use in China. Looks like mass produced standardised segments, laid from pier to pier by a special machine.
(sorry about the crappy piano music, you can mute that if you like)
Wonder if something like this works out to be cheaper and faster than conventional construction. Any HSR route is going have a lot of bridges and tunnels.
party_pants said:
I like this construction method they use in China. Looks like mass produced standardised segments, laid from pier to pier by a special machine.(sorry about the crappy piano music, you can mute that if you like)
Wonder if something like this works out to be cheaper and faster than conventional construction. Any HSR route is going have a lot of bridges and tunnels.
It’s quite an interesting example, but the basic technique of what they are doing there has been around for 50 years or so.
party_pants said:
I like this construction method they use in China. Looks like mass produced standardised segments, laid from pier to pier by a special machine.(sorry about the crappy piano music, you can mute that if you like)
Wonder if something like this works out to be cheaper and faster than conventional construction. Any HSR route is going have a lot of bridges and tunnels.
Don’t know if it’s still the case, but Richard Clayderman’s biggest CD sales figures were in China. He was hugely popular there, even if most Western ears tired of his tinklings rather quickly.
captain_spalding said:
party_pants said:
I like this construction method they use in China. Looks like mass produced standardised segments, laid from pier to pier by a special machine.(sorry about the crappy piano music, you can mute that if you like)
Wonder if something like this works out to be cheaper and faster than conventional construction. Any HSR route is going have a lot of bridges and tunnels.
Don’t know if it’s still the case, but Richard Clayderman’s biggest CD sales figures were in China. He was hugely popular there, even if most Western ears tired of his tinklings rather quickly.
Pardon my cultural insensitivity on the piano music sector.
party_pants said:
captain_spalding said:
party_pants said:
I like this construction method they use in China. Looks like mass produced standardised segments, laid from pier to pier by a special machine.(sorry about the crappy piano music, you can mute that if you like)
Wonder if something like this works out to be cheaper and faster than conventional construction. Any HSR route is going have a lot of bridges and tunnels.
Don’t know if it’s still the case, but Richard Clayderman’s biggest CD sales figures were in China. He was hugely popular there, even if most Western ears tired of his tinklings rather quickly.
Pardon my cultural insensitivity on the piano music sector.
I’ll wait for Rev’s lead about the quality, or lack of, of this musician.
party_pants said:
captain_spalding said:
party_pants said:
I like this construction method they use in China. Looks like mass produced standardised segments, laid from pier to pier by a special machine.(sorry about the crappy piano music, you can mute that if you like)
Wonder if something like this works out to be cheaper and faster than conventional construction. Any HSR route is going have a lot of bridges and tunnels.
Don’t know if it’s still the case, but Richard Clayderman’s biggest CD sales figures were in China. He was hugely popular there, even if most Western ears tired of his tinklings rather quickly.
Pardon my cultural insensitivity on the piano music sector.
I can listen to Richard Clayderman for hours.
But, the moment you stop holding that gun on me, i’m out of there.
party_pants said:
I like this construction method they use in China. Looks like mass produced standardised segments, laid from pier to pier by a special machine.(sorry about the crappy piano music, you can mute that if you like)
Wonder if something like this works out to be cheaper and faster than conventional construction. Any HSR route is going have a lot of bridges and tunnels.
What an amazing machine. Thanks for sharing this.
Michael V said:
party_pants said:
I like this construction method they use in China. Looks like mass produced standardised segments, laid from pier to pier by a special machine.(sorry about the crappy piano music, you can mute that if you like)
Wonder if something like this works out to be cheaper and faster than conventional construction. Any HSR route is going have a lot of bridges and tunnels.
What an amazing machine. Thanks for sharing this.
you can also get one in Lego Technics.
History fact, courtesy of History of Aotearoa New Zealand & Happy Hour Histories podcasts:
Let’s take a moment to admire this piece of the famous New Zealand Number 8 Wire engineering. During the first years of the Second World War, the then Japanese Empire had made several overt statements alluding to the fact that that New Zealand was sparsely populated, rich in resources and there for the taking.
Despite having a small but ferocious infantry force, the country’s entire armoured capability consisted of six armoured carriers. Bob Semple, long time Labour movement (and then involved with two incarnations of the Labour political parties in NZ) was Minister for Industry at the time and thus decided to commission these armoured beauties.
Except, they could not get any cannon to put on the vehicles. Or armour as Australia did not have access to enough steel or the necessary manufacturing facilities. So they did the classic NZ thing and used what they had at hand- corrugated iron. The tank is essentially an agricultural tractor, covered in corrugated iron, with six Bren light machine guns sticking out and only one exit- out the back. It could do a maximum of 10 Kph, and needed to stop to change gear and firing was wildly inaccurate whilst on the move.
It’s widely criticised as the “worst tank of All Time” but I think it’s a real testament to the mentality of the NZ government at the time trying to make do. I believe around four were built, but only one saw active service (as a bulldozer with the armour stripped off). Bob Semple defended the project until his retirement.
dv said:
I suppose we can make some bote calcs re the decel.900 kg.
67000 m/s.
A = 1.125 m^2
rho = 1.3 kg/m^3
drag coefficient = 1.15 ?F = 1.3 * 1.15 * 1.125 * 67000^2 /2 =
1.33 GN
This thing would have an initial deceleration of around 1500000 m/s.
Small metal caps don’t have the aerodynamics for space travel. It would have either been destroyed, or slowed to an ordinary kind of speed almost instantly.
Small metal caps don’t have the aerodynamics for space air travel.
FTFY
Yep, it would have vapourised like a falling star, but it was a rising star instead. Probably even won the “Manhole Cover Of The Year” Award.
As a thought experiment, I just did a BOTE assuming no atmosphere above the manhole cover.
Assuming that it was facing away from the sun(night time),at the speed it was going, it would have passed Pluto’s orbit in around 2 years. Nearly 4 times faster than New Horizons, which is the fastest object that mankind has built.
If it was facing towards the sun, as is more likely, it would have impacted in under a month.
Yep, it definitely would be the Cover of Manhole Magazine.
Spiny Norman said:
History fact, courtesy of History of Aotearoa New Zealand & Happy Hour Histories podcasts:
Let’s take a moment to admire this piece of the famous New Zealand Number 8 Wire engineering. During the first years of the Second World War, the then Japanese Empire had made several overt statements alluding to the fact that that New Zealand was sparsely populated, rich in resources and there for the taking.
Despite having a small but ferocious infantry force, the country’s entire armoured capability consisted of six armoured carriers. Bob Semple, long time Labour movement (and then involved with two incarnations of the Labour political parties in NZ) was Minister for Industry at the time and thus decided to commission these armoured beauties.
Except, they could not get any cannon to put on the vehicles. Or armour as Australia did not have access to enough steel or the necessary manufacturing facilities. So they did the classic NZ thing and used what they had at hand- corrugated iron. The tank is essentially an agricultural tractor, covered in corrugated iron, with six Bren light machine guns sticking out and only one exit- out the back. It could do a maximum of 10 Kph, and needed to stop to change gear and firing was wildly inaccurate whilst on the move.
It’s widely criticised as the “worst tank of All Time” but I think it’s a real testament to the mentality of the NZ government at the time trying to make do. I believe around four were built, but only one saw active service (as a bulldozer with the armour stripped off). Bob Semple defended the project until his retirement.
corri was a lot thicker in those days. not like the zincalume you get now.
ChrispenEvan said:
Spiny Norman said:
History fact, courtesy of History of Aotearoa New Zealand & Happy Hour Histories podcasts:
Let’s take a moment to admire this piece of the famous New Zealand Number 8 Wire engineering. During the first years of the Second World War, the then Japanese Empire had made several overt statements alluding to the fact that that New Zealand was sparsely populated, rich in resources and there for the taking.
Despite having a small but ferocious infantry force, the country’s entire armoured capability consisted of six armoured carriers. Bob Semple, long time Labour movement (and then involved with two incarnations of the Labour political parties in NZ) was Minister for Industry at the time and thus decided to commission these armoured beauties.
Except, they could not get any cannon to put on the vehicles. Or armour as Australia did not have access to enough steel or the necessary manufacturing facilities. So they did the classic NZ thing and used what they had at hand- corrugated iron. The tank is essentially an agricultural tractor, covered in corrugated iron, with six Bren light machine guns sticking out and only one exit- out the back. It could do a maximum of 10 Kph, and needed to stop to change gear and firing was wildly inaccurate whilst on the move.
It’s widely criticised as the “worst tank of All Time” but I think it’s a real testament to the mentality of the NZ government at the time trying to make do. I believe around four were built, but only one saw active service (as a bulldozer with the armour stripped off). Bob Semple defended the project until his retirement.
corri was a lot thicker in those days. not like the zincalume you get now.
If they used a double layer and criss-crossed it, it would be impenetrable.
Kingy said:
dv said:
I suppose we can make some bote calcs re the decel.900 kg.
67000 m/s.
A = 1.125 m^2
rho = 1.3 kg/m^3
drag coefficient = 1.15 ?F = 1.3 * 1.15 * 1.125 * 67000^2 /2 =
1.33 GN
This thing would have an initial deceleration of around 1500000 m/s.
Small metal caps don’t have the aerodynamics for space travel. It would have either been destroyed, or slowed to an ordinary kind of speed almost instantly.
Small metal caps don’t have the aerodynamics for
spaceair travel.FTFY
Yep, it would have vapourised like a falling star, but it was a rising star instead. Probably even won the “Manhole Cover Of The Year” Award.
As a thought experiment, I just did a BOTE assuming no atmosphere above the manhole cover.
Assuming that it was facing away from the sun(night time),at the speed it was going, it would have passed Pluto’s orbit in around 2 years. Nearly 4 times faster than New Horizons, which is the fastest object that mankind has built.
If it was facing towards the sun, as is more likely, it would have impacted in under a month.
Yep, it definitely would be the Cover of Manhole Magazine.
do NOT google manhole magazine!
Kingy said:
dv said:
I suppose we can make some bote calcs re the decel.
900 kg.
67000 m/s.
A = 1.125 m^2
rho = 1.3 kg/m^3
drag coefficient = 1.15 ?F = 1.3 * 1.15 * 1.125 * 67000^2 /2 =
1.33 GN
This thing would have an initial deceleration of around 1500000 m/s.
Small metal caps don’t have the aerodynamics for space travel. It would have either been destroyed, or slowed to an ordinary kind of speed almost instantly.
Small metal caps don’t have the aerodynamics for
spaceair travel.FTFY
Yep, it would have vapourised like a falling star, but it was a rising star instead. Probably even won the “Manhole Cover Of The Year” Award.
As a thought experiment, I just did a BOTE assuming no atmosphere above the manhole cover.
Assuming that it was facing away from the sun(night time),at the speed it was going, it would have passed Pluto’s orbit in around 2 years. Nearly 4 times faster than New Horizons, which is the fastest object that mankind has built.
If it was facing towards the sun, as is more likely, it would have impacted in under a month.
Yep, it definitely would be the Cover of Manhole Magazine.
thanks both of yous and all other contributors
since we’re SCIENCE, we mean it would be worth investigating in further detail
but we don’t have immediate personal access to any nuclear warheads, or deep unused mineshafts
but if any of yous were happy to donate some or run the experiment yourselves we would be grateful
Traveling Salesman Problem Visualisation.
ChrispenEvan said:
Kingy said:
dv said:
I suppose we can make some bote calcs re the decel.
900 kg.
67000 m/s.
A = 1.125 m^2
rho = 1.3 kg/m^3
drag coefficient = 1.15 ?F = 1.3 * 1.15 * 1.125 * 67000^2 /2 =
1.33 GN
This thing would have an initial deceleration of around 1500000 m/s.
Small metal caps don’t have the aerodynamics for space travel. It would have either been destroyed, or slowed to an ordinary kind of speed almost instantly.
Small metal caps don’t have the aerodynamics for
spaceair travel.FTFY
Yep, it would have vapourised like a falling star, but it was a rising star instead. Probably even won the “Manhole Cover Of The Year” Award.
As a thought experiment, I just did a BOTE assuming no atmosphere above the manhole cover.
Assuming that it was facing away from the sun(night time),at the speed it was going, it would have passed Pluto’s orbit in around 2 years. Nearly 4 times faster than New Horizons, which is the fastest object that mankind has built.
If it was facing towards the sun, as is more likely, it would have impacted in under a month.
Yep, it definitely would be the Cover of Manhole Magazine.
do NOT google manhole magazine!
what about peoplewhomenstruatehole magazine
ChrispenEvan said:
Kingy said:
dv said:
I suppose we can make some bote calcs re the decel.900 kg.
67000 m/s.
A = 1.125 m^2
rho = 1.3 kg/m^3
drag coefficient = 1.15 ?F = 1.3 * 1.15 * 1.125 * 67000^2 /2 =
1.33 GN
This thing would have an initial deceleration of around 1500000 m/s.
Small metal caps don’t have the aerodynamics for space travel. It would have either been destroyed, or slowed to an ordinary kind of speed almost instantly.
Small metal caps don’t have the aerodynamics for
spaceair travel.FTFY
Yep, it would have vapourised like a falling star, but it was a rising star instead. Probably even won the “Manhole Cover Of The Year” Award.
As a thought experiment, I just did a BOTE assuming no atmosphere above the manhole cover.
Assuming that it was facing away from the sun(night time),at the speed it was going, it would have passed Pluto’s orbit in around 2 years. Nearly 4 times faster than New Horizons, which is the fastest object that mankind has built.
If it was facing towards the sun, as is more likely, it would have impacted in under a month.
Yep, it definitely would be the Cover of Manhole Magazine.
do NOT google manhole magazine!
It’s fine, you can keep it safe with clarifying search times, like hot fast obliterated man hole operation plumb bob.
fsm said:
If they used a double layer and criss-crossed it, it would be impenetrable.
Blimey, i’d want to see that demonstrated before i got into one and went anywhere hostile in it.
It might have acceptably slowed down the Japanese 6.5mm bullet, with its muzzle velocity of 2,300 feet per sec, but it probably wouldn’t have stood up so well to their later (from 1940) 7.7mm bullet, which not only had a higher muzzle velocity, but came in incendiary, tracer, and armour-piercing variants.
captain_spalding said:
fsm said:If they used a double layer and criss-crossed it, it would be impenetrable.
Blimey, i’d want to see that demonstrated before i got into one and went anywhere hostile in it.
It might have acceptably slowed down the Japanese 6.5mm bullet, with its muzzle velocity of 2,300 feet per sec, but it probably wouldn’t have stood up so well to their later (from 1940) 7.7mm bullet, which not only had a higher muzzle velocity, but came in incendiary, tracer, and armour-piercing variants.
Nah, it had chicken wire reinforcing. Completely impenetrable by anything short of nuclear weapons.
Kingy said:
captain_spalding said:
fsm said:If they used a double layer and criss-crossed it, it would be impenetrable.
Blimey, i’d want to see that demonstrated before i got into one and went anywhere hostile in it.
It might have acceptably slowed down the Japanese 6.5mm bullet, with its muzzle velocity of 2,300 feet per sec, but it probably wouldn’t have stood up so well to their later (from 1940) 7.7mm bullet, which not only had a higher muzzle velocity, but came in incendiary, tracer, and armour-piercing variants.
Nah, it had chicken wire reinforcing. Completely impenetrable by anything short of nuclear weapons.
Ah, chicken-wire. Also known as ‘Grandpa’s Crimsafe mesh’.
The Krakatoa Volcanic Eruption of 1883 – The Loudest Sound Ever Heard?
Spiny Norman said:
The Krakatoa Volcanic Eruption of 1883 – The Loudest Sound Ever Heard?
Even its name KRAKATOA! sounds loud and explosive.
Bubblecar said:
Spiny Norman said:
The Krakatoa Volcanic Eruption of 1883 – The Loudest Sound Ever Heard?Even its name KRAKATOA! sounds loud and explosive.
There was that execrable movie titled’ Krakatoa, East of Java’.
No-one knows just why it was so titled, as Krakatoa/Krakatau is just to the west of Java.
I’ve not watched the YouTube. I prefer to read things.
But I’ll comment anyway. I thought Tambora was bigger/louder. And then I realized I’d forgotten Lake Toba. But then, that was much further back in history.
———————————————————————————————————————————-
Indonesia’s Disasters
Interestingly, neither the Tambora nor the Krakatoa eruption ranks as the largest in Indonesian history (or perhaps more properly, pre-history). The Lake Toba eruption on Sumatra occurred 75,000 years ago and is reputed to have been the most intensive in the world in the last 2 million years. Lake Toba ejected approximately 675 cubic miles (2,800 cubic kilometers) of material. This is 17 times the Tambora volume and more than 60 times the Krakatoa volume. But none of the three killed as many people (230,000) as the Boxing Day tsunami (December 26, 2004), which was set off by a 9.0 earthquake off Sumatra. Population had exploded between 1883 and 2004, which drove the Boxing Day tsunami fatalities far above those of the Krakatoa tsunami.
——————————————————————————————————————————————
REF: https://www.newgeography.com/content/004301-tambora-vs-krakatoa-which-was-worse
captain_spalding said:
Bubblecar said:
Spiny Norman said:
The Krakatoa Volcanic Eruption of 1883 – The Loudest Sound Ever Heard?Even its name KRAKATOA! sounds loud and explosive.
There was that execrable movie titled’ Krakatoa, East of Java’.
No-one knows just why it was so titled, as Krakatoa/Krakatau is just to the west of Java.
If you take the long, long, long way, it’s east.
A Slower Speed of Light.
Night fighters in an era before radar were, how shall we say, inventive?
This French SPAD has a searchlight bolted on in front of the propeller, was more radical than some.
Spiny Norman said:
Night fighters in an era before radar were, how shall we say, inventive?
This French SPAD has a searchlight bolted on in front of the propeller, was more radical than some.
Ye gods! How much extra drag would that induce?
AussieDJ said:
Spiny Norman said:
Night fighters in an era before radar were, how shall we say, inventive?
This French SPAD has a searchlight bolted on in front of the propeller, was more radical than some.
Ye gods! How much extra drag would that induce?
Yes but worth it. Even the Dam Busters had searchlights fitted. They pointed downwards, though.
AussieDJ said:
Spiny Norman said:
Night fighters in an era before radar were, how shall we say, inventive?
This French SPAD has a searchlight bolted on in front of the propeller, was more radical than some.
Ye gods! How much extra drag would that induce?
At least it wouldn’t matter that it’s turning round and round, ‘cos it’s already round.
Bubblecar said:
AussieDJ said:
Spiny Norman said:
Night fighters in an era before radar were, how shall we say, inventive?
This French SPAD has a searchlight bolted on in front of the propeller, was more radical than some.
Ye gods! How much extra drag would that induce?
At least it wouldn’t matter that it’s turning round and round, ‘cos it’s already round.
Actually it doesn’t turn with the propeller, it’s supported on a framework.
Bubblecar said:
Bubblecar said:
AussieDJ said:Ye gods! How much extra drag would that induce?
At least it wouldn’t matter that it’s turning round and round, ‘cos it’s already round.
Actually it doesn’t turn with the propeller, it’s supported on a framework.
And, thereby, disturbing the flow of air to the propellor.
How well do propellers work in a turbulent flow?
AussieDJ said:
Bubblecar said:
Bubblecar said:At least it wouldn’t matter that it’s turning round and round, ‘cos it’s already round.
Actually it doesn’t turn with the propeller, it’s supported on a framework.
And, thereby, disturbing the flow of air to the propellor.
How well do propellers work in a turbulent flow?
I don’t know but apparently the Spad S.XI (including this sole night fighter conversion) was a troublesome and unpopular plane anyway:
https://en.wikipedia.org/wiki/SPAD_S.XI
Bubblecar said:
Bubblecar said:
AussieDJ said:Ye gods! How much extra drag would that induce?
At least it wouldn’t matter that it’s turning round and round, ‘cos it’s already round.
Actually it doesn’t turn with the propeller, it’s supported on a framework.
Very low tech.
The very last ground test run of the mighty Pratt & Whitney J58 engine, the one that powered the Mach 3.2 SR-71 spy plane.
The Pratt & Whitney J58 (company designation JT11D-20) is an American jet engine that powered the Lockheed A-12, and subsequently the YF-12 and the SR-71 aircraft. It was an afterburning turbojet engine with a unique compressor bleed to the afterburner that gave increased thrust at high speeds. Because of the wide speed range of the aircraft, the engine needed two modes of operation to take it from stationary on the ground to 2,000 mph (3,200 km/h) at altitude. It was a conventional afterburning turbojet for take-off and acceleration to Mach 2 and then used permanent compressor bleed to the afterburner above Mach 2. The way the engine worked at cruise led it to be described as “acting like a turboramjet”. It has also been described as a turboramjet based on incorrect statements describing the turbomachinery as being completely bypassed.
The engine performance that met the mission requirements for the CIA and USAF over many years was later enhanced slightly for NASA experimental work (carrying external payloads on the top of the aircraft), which required more thrust to deal with higher aircraft drag.
Spiny Norman said:
The very last ground test run of the mighty Pratt & Whitney J58 engine, the one that powered the Mach 3.2 SR-71 spy plane.
The Pratt & Whitney J58 (company designation JT11D-20) is an American jet engine that powered the Lockheed A-12, and subsequently the YF-12 and the SR-71 aircraft. It was an afterburning turbojet engine with a unique compressor bleed to the afterburner that gave increased thrust at high speeds. Because of the wide speed range of the aircraft, the engine needed two modes of operation to take it from stationary on the ground to 2,000 mph (3,200 km/h) at altitude. It was a conventional afterburning turbojet for take-off and acceleration to Mach 2 and then used permanent compressor bleed to the afterburner above Mach 2. The way the engine worked at cruise led it to be described as “acting like a turboramjet”. It has also been described as a turboramjet based on incorrect statements describing the turbomachinery as being completely bypassed.
The engine performance that met the mission requirements for the CIA and USAF over many years was later enhanced slightly for NASA experimental work (carrying external payloads on the top of the aircraft), which required more thrust to deal with higher aircraft drag.
IIRC, it also required its own special high-flashpoint fuel, which necessitated dedicated air refuelling tankers that ONLY refuelled SR-71s.
In-flight refuelling was always needed, because the planes leaked like sieves on the ground because of the expansion gaps that had to be allowed for heating due to engine operation and air friction.
captain_spalding said:
Spiny Norman said:
The very last ground test run of the mighty Pratt & Whitney J58 engine, the one that powered the Mach 3.2 SR-71 spy plane.
The Pratt & Whitney J58 (company designation JT11D-20) is an American jet engine that powered the Lockheed A-12, and subsequently the YF-12 and the SR-71 aircraft. It was an afterburning turbojet engine with a unique compressor bleed to the afterburner that gave increased thrust at high speeds. Because of the wide speed range of the aircraft, the engine needed two modes of operation to take it from stationary on the ground to 2,000 mph (3,200 km/h) at altitude. It was a conventional afterburning turbojet for take-off and acceleration to Mach 2 and then used permanent compressor bleed to the afterburner above Mach 2. The way the engine worked at cruise led it to be described as “acting like a turboramjet”. It has also been described as a turboramjet based on incorrect statements describing the turbomachinery as being completely bypassed.
The engine performance that met the mission requirements for the CIA and USAF over many years was later enhanced slightly for NASA experimental work (carrying external payloads on the top of the aircraft), which required more thrust to deal with higher aircraft drag.
IIRC, it also required its own special high-flashpoint fuel, which necessitated dedicated air refuelling tankers that ONLY refuelled SR-71s.
In-flight refuelling was always needed, because the planes leaked like sieves on the ground because of the expansion gaps that had to be allowed for heating due to engine operation and air friction.
Yep, JP-7 I think it was and it was exclusively for the A-12/YF-12/SR-71.
All their flights had them taking off with less than half tanks, with an immediate refuel before starting their mission.
Spiny Norman said:
Yep, JP-7 I think it was and it was exclusively for the A-12/YF-12/SR-71.
All their flights had them taking off with less than half tanks, with an immediate refuel before starting their mission.
And then it was all about following really detailed flight plans so as to best get the best fuel/energy management, all ‘ballistic arcs’ and stuff.
I Legally Had The Worlds Shortest Marriage.
Max Fosh at work.
ELEMENT NAMES: The etymology of the periodic table.
“The games that were played out in Oman at Thumrait back in 1981, no rules…. Dik Manning putting his Jaguar through its paces.”
Spiny Norman said:
“The games that were played out in Oman at Thumrait back in 1981, no rules…. Dik Manning putting his Jaguar through its paces.”
And four Strikemasters in the background!
Shackleton’s Expedition to Antarctica on The Endurance: The photographic journey of one of the greatest survival stories ever told, 1914-1917.
In August 1914, explorer Ernest Shackleton boarded the Endurance and set sail for Antarctica, where he planned to cross the last uncharted continent on foot.
The expedition was an attempt to make the first land crossing of the Antarctic continent. After Roald Amundsen’s South Pole expedition in 1911, this crossing remained, in Shackleton’s words, the “one great main object of Antarctic journeyings”.
Shackleton’s plan was to sail to the Weddell Sea and to land a shore party near Vahsel Bay, in preparation for a transcontinental march via the South Pole to the Ross Sea. A supporting group, the Ross Sea party, would meanwhile establish camp in McMurdo Sound, and from there lay a series of supply depots across the Ross Ice Shelf to the foot of the Beardmore Glacier.
These depots would be essential for the transcontinental party’s survival, as the group would not be able to carry enough provisions for the entire crossing. The expedition required two ships: Endurance under Shackleton for the Weddell Sea party, and Aurora, under Aeneas Mackintosh, for the Ross Sea party.
Other scientific and exploratory sledging trips were planned for parties setting out from the main base as well as another party who were to remain at the base and carry out a variety of scientific work.
rarehistoricalphotos.com/shackleton-antarctica-endurance-photographs
Spiny Norman said:
Shackleton’s Expedition to Antarctica on The Endurance: The photographic journey of one of the greatest survival stories ever told, 1914-1917.In August 1914, explorer Ernest Shackleton boarded the Endurance and set sail for Antarctica, where he planned to cross the last uncharted continent on foot.
The expedition was an attempt to make the first land crossing of the Antarctic continent. After Roald Amundsen’s South Pole expedition in 1911, this crossing remained, in Shackleton’s words, the “one great main object of Antarctic journeyings”.
Shackleton’s plan was to sail to the Weddell Sea and to land a shore party near Vahsel Bay, in preparation for a transcontinental march via the South Pole to the Ross Sea. A supporting group, the Ross Sea party, would meanwhile establish camp in McMurdo Sound, and from there lay a series of supply depots across the Ross Ice Shelf to the foot of the Beardmore Glacier.
These depots would be essential for the transcontinental party’s survival, as the group would not be able to carry enough provisions for the entire crossing. The expedition required two ships: Endurance under Shackleton for the Weddell Sea party, and Aurora, under Aeneas Mackintosh, for the Ross Sea party.
Other scientific and exploratory sledging trips were planned for parties setting out from the main base as well as another party who were to remain at the base and carry out a variety of scientific work.
rarehistoricalphotos.com/shackleton-antarctica-endurance-photographs
You usually get the ice cave photo with those.
5 Weirdest Current Theories About Black Holes
https://www.youtube.com/watch?v=SYv0Iixzl4Y
The Largest Objects in the Universe
https://www.youtube.com/watch?v=JkiDjoea6Kk
Uncommonly Difficult IQ Tests.
Reverse-engineering an electromechanical Central Air Data Computer
Determining the airspeed and altitude of a fighter plane is harder than you’d expect. At slower speeds, pressure measurements can give the altitude, air speed, and other “air data”. But as planes approach the speed of sound, complicated equations are needed to accurately compute these values. The Bendix Central Air Data Computer (CADC) solved this problem for military planes such as the F-101 and the F-111 fighters, and the B-58 bomber.1 This electromechanical marvel was crammed full of 1955 technology: gears, cams, synchros, and magnetic amplifiers. In this blog post I look inside the CADC, describe the calculations it performed, and explain how it performed these calculations mechanically.
www.righto.com/2023/02/bendix-central-air-data-computer-cadc.html
Clean energy breakthrough as electricity is produced out of thin air.
While most of us will never bear witness to them, many of the world’s smallest organisms have some incredible means of survival. Some soil bacteria, for example, can gobble up hydrogen from the air and use it for fuel if starved of any other food.
It’s exactly this microbiological trickery that set researchers from Monash University in Australia on a long path to locating and isolating an enzyme from Mycobacterium smegmatis that processes the consumed hydrogen and outputs it as electricity. Now, this has the potential to be harnessed for use to power things such as small devices and implants.
“We’ve known for some time that bacteria can use the trace hydrogen in the air as a source of energy to help them grow and survive, including in Antarctic soils, volcanic craters, and the deep ocean,” said Chris Greening, microbiology professor at Monash and co-lead of this study. “But we didn’t know how they did this, until now.”
While hydrogen only makes up 0.00005% of the atmosphere, this isolated hydrogen catalyzing enzyme, which the team called Huc, is able to consume it easily. And while bacteria removes 70 million tonnes of hydrogen yearly from the air, the molecular structure of Huc sees the enzyme split the hydrogen molecules to form an electron transport chain, essentially producing an electrical circuit in the cell.
Spiny Norman said:
Clean energy breakthrough as electricity is produced out of thin air.While most of us will never bear witness to them, many of the world’s smallest organisms have some incredible means of survival. Some soil bacteria, for example, can gobble up hydrogen from the air and use it for fuel if starved of any other food.
It’s exactly this microbiological trickery that set researchers from Monash University in Australia on a long path to locating and isolating an enzyme from Mycobacterium smegmatis that processes the consumed hydrogen and outputs it as electricity. Now, this has the potential to be harnessed for use to power things such as small devices and implants.
“We’ve known for some time that bacteria can use the trace hydrogen in the air as a source of energy to help them grow and survive, including in Antarctic soils, volcanic craters, and the deep ocean,” said Chris Greening, microbiology professor at Monash and co-lead of this study. “But we didn’t know how they did this, until now.”
While hydrogen only makes up 0.00005% of the atmosphere, this isolated hydrogen catalyzing enzyme, which the team called Huc, is able to consume it easily. And while bacteria removes 70 million tonnes of hydrogen yearly from the air, the molecular structure of Huc sees the enzyme split the hydrogen molecules to form an electron transport chain, essentially producing an electrical circuit in the cell.
QI, but a “clean energy breakthrough”?
We’ll see.
The Rev Dodgson said:
Spiny Norman said:
Clean energy breakthrough as electricity is produced out of thin air.While most of us will never bear witness to them, many of the world’s smallest organisms have some incredible means of survival. Some soil bacteria, for example, can gobble up hydrogen from the air and use it for fuel if starved of any other food.
It’s exactly this microbiological trickery that set researchers from Monash University in Australia on a long path to locating and isolating an enzyme from Mycobacterium smegmatis that processes the consumed hydrogen and outputs it as electricity. Now, this has the potential to be harnessed for use to power things such as small devices and implants.
“We’ve known for some time that bacteria can use the trace hydrogen in the air as a source of energy to help them grow and survive, including in Antarctic soils, volcanic craters, and the deep ocean,” said Chris Greening, microbiology professor at Monash and co-lead of this study. “But we didn’t know how they did this, until now.”
While hydrogen only makes up 0.00005% of the atmosphere, this isolated hydrogen catalyzing enzyme, which the team called Huc, is able to consume it easily. And while bacteria removes 70 million tonnes of hydrogen yearly from the air, the molecular structure of Huc sees the enzyme split the hydrogen molecules to form an electron transport chain, essentially producing an electrical circuit in the cell.
QI, but a “clean energy breakthrough”?
We’ll see.
The big question: is there a mining company involved so that governments can give them subsidies/hefty tax breaks in return for a percentage kick-back to party funds?
captain_spalding said:
The Rev Dodgson said:
Spiny Norman said:
Clean energy breakthrough as electricity is produced out of thin air.While most of us will never bear witness to them, many of the world’s smallest organisms have some incredible means of survival. Some soil bacteria, for example, can gobble up hydrogen from the air and use it for fuel if starved of any other food.
It’s exactly this microbiological trickery that set researchers from Monash University in Australia on a long path to locating and isolating an enzyme from Mycobacterium smegmatis that processes the consumed hydrogen and outputs it as electricity. Now, this has the potential to be harnessed for use to power things such as small devices and implants.
“We’ve known for some time that bacteria can use the trace hydrogen in the air as a source of energy to help them grow and survive, including in Antarctic soils, volcanic craters, and the deep ocean,” said Chris Greening, microbiology professor at Monash and co-lead of this study. “But we didn’t know how they did this, until now.”
While hydrogen only makes up 0.00005% of the atmosphere, this isolated hydrogen catalyzing enzyme, which the team called Huc, is able to consume it easily. And while bacteria removes 70 million tonnes of hydrogen yearly from the air, the molecular structure of Huc sees the enzyme split the hydrogen molecules to form an electron transport chain, essentially producing an electrical circuit in the cell.
QI, but a “clean energy breakthrough”?
We’ll see.
The big question: is there a mining company involved so that governments can give them subsidies/hefty tax breaks in return for a percentage kick-back to party funds?
booooriiiing!
Bogsnorkler said:
captain_spalding said:
The Rev Dodgson said:QI, but a “clean energy breakthrough”?
We’ll see.
The big question: is there a mining company involved so that governments can give them subsidies/hefty tax breaks in return for a percentage kick-back to party funds?
booooriiiing!
It’s Sunday morning. I’m just re-running ‘The Best of Spadling’s Kookery’.
Vintage photographs of early vertical parking garages, 1920-1960.
The rapid rise of automobiles at the turn of the 20th century presented an immediate problem: where to park all these vehicles roaming the streets?
The concept for vertical parking garages was and is driven by two factors: a need for parking spaces and a scarcity of available land.
The earliest use of the vertical parking solution was in Paris, France in 1905 at the Garage Rue de Ponthieu. The system consisted of a groundbreaking multi-story concrete structure with an internal car elevator to transport cars to upper levels where attendants parked the cars.
In the 1920s, a Ferris wheel-like vertical system (for cars rather than people) called a paternoster system became popular as it could park eight cars in the ground space normally used for parking two cars. Mechanically simple with a small footprint, the paternoster was easy to use in many places, including inside buildings.
Rotary lift parking systems operate like a Ferris wheel: cars are parked in suspended cages attached to a belt, one car at a time, the entire series of cars rotated until the next cage is at the bottom.
Powered by electric motors or hydraulic pumps, they are actually less expensive per parking space because they use less ground and require less structure to be erected around them.
And the occasional oops.
Spiny Norman said:
Vintage photographs of early vertical parking garages, 1920-1960.The rapid rise of automobiles at the turn of the 20th century presented an immediate problem: where to park all these vehicles roaming the streets?
The concept for vertical parking garages was and is driven by two factors: a need for parking spaces and a scarcity of available land.
The earliest use of the vertical parking solution was in Paris, France in 1905 at the Garage Rue de Ponthieu. The system consisted of a groundbreaking multi-story concrete structure with an internal car elevator to transport cars to upper levels where attendants parked the cars.
In the 1920s, a Ferris wheel-like vertical system (for cars rather than people) called a paternoster system became popular as it could park eight cars in the ground space normally used for parking two cars. Mechanically simple with a small footprint, the paternoster was easy to use in many places, including inside buildings.
Rotary lift parking systems operate like a Ferris wheel: cars are parked in suspended cages attached to a belt, one car at a time, the entire series of cars rotated until the next cage is at the bottom.
Powered by electric motors or hydraulic pumps, they are actually less expensive per parking space because they use less ground and require less structure to be erected around them.
And the occasional oops.
A link would be handy no doubt.
rarehistoricalphotos.com/vintage-photographs-of-early-vertical-parking-garages
The unspillable cup.
170 trillion pieces of microplastic in oceans.
The impact of plastic pollution on marine life is growing and a new report suggests the problem is going to get worse.
Scientists say there has been an alarming rise in the number of pieces of micro-plastics in the oceans and urgent solutions are required to stop this plastic smog.
This is the crankshaft for a
Wärtsilä-Sulzer RTA96-C engine, the largest reciprocating engine in the world, used in large container ships. It’s a 1810-litre engine that generates 108,920
horsepower at 102 RPM, and it idles at 22 RPM… almost 3 seconds per rotation. This
crankshaft weighs 300 tons.
Spiny Norman said:
This is the crankshaft for a
Wärtsilä-Sulzer RTA96-C engine, the largest reciprocating engine in the world, used in large container ships. It’s a 1810-litre engine that generates 108,920
horsepower at 102 RPM, and it idles at 22 RPM… almost 3 seconds per rotation. This
crankshaft weighs 300 tons.
Would this fit in my gokart?
The Sharpest Object In The World Can’t Cut Anything.
Spiny Norman said:
The Sharpest Object In The World Can’t Cut Anything.
A wife’s tongue ?
Cymek said:
Spiny Norman said:
The Sharpest Object In The World Can’t Cut Anything.A wife’s tongue ?
the sharpest tone in the universe is inaudible
note if you anagram it then
How Fast Could a Computer Be?
World’s Strongest Magnet.
Longer than two Olympic-sized swimming pools Japanese billionaire has commissioned the world’s first megayacht to be powered by emission-free hydrogen fuel cell technology.
https://luxurylaunches.com/transport/lurssen-project-cosmos.php
It stores the hydrogen by having large methanol tanks and separating the hydrogen from it …. which is often not a very clean process.
Serpens catus (snake cat) is the rarest species of feline on Earth. These animals live in hard to reach regions of the Amazon rainforest, and therefore they are relatively poorly studied. The first images capturing the snake cat appeared only in the 2020. A mammal weighs up to 4 kilograms and reaches 50 centimetres in length. The animal is virtually untamed, although some Amazonian tribes use snake cats to protect their homes from rodents.
Spiny Norman said:
Serpens catus (snake cat) is the rarest species of feline on Earth. These animals live in hard to reach regions of the Amazon rainforest, and therefore they are relatively poorly studied. The first images capturing the snake cat appeared only in the 2020. A mammal weighs up to 4 kilograms and reaches 50 centimetres in length. The animal is virtually untamed, although some Amazonian tribes use snake cats to protect their homes from rodents.
Is the animal really found in the regions of the Amazon rainforest?
No, Serpens Catus, aka snake cat, isn’t real. The viral posts claim images of the snake cat first came to light in 2020, but there’s no scientific evidence to prove its existence.
Furthermore, there exists no other species of feline that remotely resembles the snake cat for one to be confused with. Therefore, it’s safe to say that the picture in the viral post is edited.
https://www.hitc.com/en-gb/2023/03/15/is-serpens-catus-or-amazon-snake-cat-real/
esselte said:
Spiny Norman said:
Serpens catus (snake cat) is the rarest species of feline on Earth. These animals live in hard to reach regions of the Amazon rainforest, and therefore they are relatively poorly studied. The first images capturing the snake cat appeared only in the 2020. A mammal weighs up to 4 kilograms and reaches 50 centimetres in length. The animal is virtually untamed, although some Amazonian tribes use snake cats to protect their homes from rodents.
Is the animal really found in the regions of the Amazon rainforest?
No, Serpens Catus, aka snake cat, isn’t real. The viral posts claim images of the snake cat first came to light in 2020, but there’s no scientific evidence to prove its existence.
Furthermore, there exists no other species of feline that remotely resembles the snake cat for one to be confused with. Therefore, it’s safe to say that the picture in the viral post is edited.
https://www.hitc.com/en-gb/2023/03/15/is-serpens-catus-or-amazon-snake-cat-real/
Sorry about that!
esselte said:
Spiny Norman said:
Serpens catus (snake cat) is the rarest species of feline on Earth. These animals live in hard to reach regions of the Amazon rainforest, and therefore they are relatively poorly studied. The first images capturing the snake cat appeared only in the 2020. A mammal weighs up to 4 kilograms and reaches 50 centimetres in length. The animal is virtually untamed, although some Amazonian tribes use snake cats to protect their homes from rodents.
Is the animal really found in the regions of the Amazon rainforest?
No, Serpens Catus, aka snake cat, isn’t real. The viral posts claim images of the snake cat first came to light in 2020, but there’s no scientific evidence to prove its existence.
Furthermore, there exists no other species of feline that remotely resembles the snake cat for one to be confused with. Therefore, it’s safe to say that the picture in the viral post is edited.
https://www.hitc.com/en-gb/2023/03/15/is-serpens-catus-or-amazon-snake-cat-real/
Perhaps gene editing can change their colour like photoshop
esselte said:
Spiny Norman said:
Serpens catus (snake cat) is the rarest species of feline on Earth. These animals live in hard to reach regions of the Amazon rainforest, and therefore they are relatively poorly studied. The first images capturing the snake cat appeared only in the 2020. A mammal weighs up to 4 kilograms and reaches 50 centimetres in length. The animal is virtually untamed, although some Amazonian tribes use snake cats to protect their homes from rodents.
Is the animal really found in the regions of the Amazon rainforest?
No, Serpens Catus, aka snake cat, isn’t real. The viral posts claim images of the snake cat first came to light in 2020, but there’s no scientific evidence to prove its existence.
Furthermore, there exists no other species of feline that remotely resembles the snake cat for one to be confused with. Therefore, it’s safe to say that the picture in the viral post is edited.
https://www.hitc.com/en-gb/2023/03/15/is-serpens-catus-or-amazon-snake-cat-real/
should be Felis serpens surly?
JudgeMental said:
esselte said:
Spiny Norman said:
Serpens catus (snake cat) is the rarest species of feline on Earth. These animals live in hard to reach regions of the Amazon rainforest, and therefore they are relatively poorly studied. The first images capturing the snake cat appeared only in the 2020. A mammal weighs up to 4 kilograms and reaches 50 centimetres in length. The animal is virtually untamed, although some Amazonian tribes use snake cats to protect their homes from rodents.
Is the animal really found in the regions of the Amazon rainforest?
No, Serpens Catus, aka snake cat, isn’t real. The viral posts claim images of the snake cat first came to light in 2020, but there’s no scientific evidence to prove its existence.
Furthermore, there exists no other species of feline that remotely resembles the snake cat for one to be confused with. Therefore, it’s safe to say that the picture in the viral post is edited.
https://www.hitc.com/en-gb/2023/03/15/is-serpens-catus-or-amazon-snake-cat-real/
should be Felis serpens surly?
yes, I would think so.
JudgeMental said:
esselte said:
Spiny Norman said:
Serpens catus (snake cat) is the rarest species of feline on Earth. These animals live in hard to reach regions of the Amazon rainforest, and therefore they are relatively poorly studied. The first images capturing the snake cat appeared only in the 2020. A mammal weighs up to 4 kilograms and reaches 50 centimetres in length. The animal is virtually untamed, although some Amazonian tribes use snake cats to protect their homes from rodents.
Is the animal really found in the regions of the Amazon rainforest?
No, Serpens Catus, aka snake cat, isn’t real. The viral posts claim images of the snake cat first came to light in 2020, but there’s no scientific evidence to prove its existence.
Furthermore, there exists no other species of feline that remotely resembles the snake cat for one to be confused with. Therefore, it’s safe to say that the picture in the viral post is edited.
https://www.hitc.com/en-gb/2023/03/15/is-serpens-catus-or-amazon-snake-cat-real/
should be Felis serpens surly?
Well spotted.
A new rear wheel for a Formula 5000 racing car. 15“diameter, 17“wide.
Quite large!
Spiny Norman said:
A new rear wheel for a Formula 5000 racing car. 15“diameter, 17“wide.
Quite large!
I find it amazing that the incredible amount of horsepower from a top fueller is transmitted from the rim to the tire through friction on the bead. Some of the top level gokarts have to screw bolts through the bead in order to get that torque into the tire.
Kingy said:
Spiny Norman said:
A new rear wheel for a Formula 5000 racing car. 15“diameter, 17“wide.
Quite large!
I find it amazing that the incredible amount of horsepower from a top fueller is transmitted from the rim to the tire through friction on the bead. Some of the top level gokarts have to screw bolts through the bead in order to get that torque into the tire.
Especially with the low pressure they run.
Ingenuity’s 47 flight in action! Multiple Mars videos show Helicopter from different perspectives.
Spiny Norman said:
Ingenuity’s 47 flight in action! Multiple Mars videos show Helicopter from different perspectives.
Some serious engierring went into that from many disciplines.
Peak Warming Man said:
Spiny Norman said:
Ingenuity’s 47 flight in action! Multiple Mars videos show Helicopter from different perspectives.Some serious engierring went into that from many disciplines.
Its an impressive machine
Cymek said:
Peak Warming Man said:
Spiny Norman said:
Ingenuity’s 47 flight in action! Multiple Mars videos show Helicopter from different perspectives.Some serious engierring went into that from many disciplines.
Its an impressive machine
It indirectly shows us Mars is lifeless in that particular area as no Martians are throwing beer bottles at it for invading their privacy
Cymek said:
Cymek said:
Peak Warming Man said:Some serious engierring went into that from many disciplines.
Its an impressive machine
It indirectly shows us Mars is lifeless in that particular area as no Martians are throwing beer bottles at it for invading their privacy
Tamb said:
Cymek said:
Cymek said:Its an impressive machine
It indirectly shows us Mars is lifeless in that particular area as no Martians are throwing beer bottles at it for invading their privacy
Maybe they’re in Covid lockdown.
Didn’t think of that
Cymek said:
Cymek said:
Peak Warming Man said:Some serious engierring went into that from many disciplines.
Its an impressive machine
It indirectly shows us Mars is lifeless in that particular area as no Martians are throwing beer bottles at it for invading their privacy
The Martians might have skipped the Solar System when they saw their new neighbours.
Witty Rejoinder said:
Cymek said:
Cymek said:Its an impressive machine
It indirectly shows us Mars is lifeless in that particular area as no Martians are throwing beer bottles at it for invading their privacy
The Martians might have skipped the Solar System when they saw their new neighbours.
Who could blame them for that?
U.S Air Force footage shows Russian fighter jet crashing into U.S drone over Black Sea.
After the second pass, you can see how the prop on the UAV has one blade bent somewhat.
A lot of photos of the Soviet lunar lander. It was to be launched in the mighty N1 rocket, with two cosmonauts in the Soyuz capsule. When in lunar orbit, the lander pilot – only one cosmonaut would fly it – would do a short EVA to get from the Soyuz to the lander.
It has just the one rocket motor to do the descent and take-off, thus saving more weight. A fair bit of the lower structure would stay on the Moon, again to save weight, and act as a launching pad.
Spiny Norman said:
A lot of photos of the Soviet lunar lander. It was to be launched in the mighty N1 rocket, with two cosmonauts in the Soyuz capsule. When in lunar orbit, the lander pilot – only one cosmonaut would fly it – would do a short EVA to get from the Soyuz to the lander.
It has just the one rocket motor to do the descent and take-off, thus saving more weight. A fair bit of the lower structure would stay on the Moon, again to save weight, and act as a launching pad.
Tamb said:
Roughly what year was that?
The Soviets only really started on the Moon programme around the mid 60’s, so the Yanks had a good head start on them. The Soviets still wanted to beat the US to put a man on the Moon, but the development of the big N1 rocket was (literally) a disaster with each of the three or four launches. So they gave up trying to make a first landing and went for one in about 1971 or 1972 I think. But the N1 was too difficult to get working without Korolev and so the government stopped the programme.
Spiny Norman said:
Tamb said:Roughly what year was that?
The Soviets only really started on the Moon programme around the mid 60’s, so the Yanks had a good head start on them. The Soviets still wanted to beat the US to put a man on the Moon, but the development of the big N1 rocket was (literally) a disaster with each of the three or four launches. So they gave up trying to make a first landing and went for one in about 1971 or 1972 I think. But the N1 was too difficult to get working without Korolev and so the government stopped the programme.
The Saab Draken, a 1950’s – 1970’s fighter/interceptor from Sweden.
https://en.wikipedia.org/wiki/Saab_35_Draken
Making My Physics Engine 10x Faster and Simulating Trusses.
Spiny Norman said:
Making My Physics Engine 10x Faster and Simulating Trusses.
Solving equations like that is how I spend my working day.
(or the computer does anyway).
The Rev Dodgson said:
Spiny Norman said:
Making My Physics Engine 10x Faster and Simulating Trusses.Solving equations like that is how I spend my working day.
(or the computer does anyway).
I hadn’t heard of the Gauss-Seidel method.
I guess more recent iterative methods would be more efficient, but I’ll have a look at it anyway.
5 Monster Volcano Eruptions Caught On Camera.
Spiny Norman said:
5 Monster Volcano Eruptions Caught On Camera.
Nice.
Bit hard to judge scale in some of them
This video of an octopus changing colours in her sleep might be an indication she’s dreaming.
Spiny Norman said:
This video of an octopus changing colours in her sleep might be an indication she’s dreaming.
I wonder what they dream about
dv said:
Spiny Norman said:
This video of an octopus changing colours in her sleep might be an indication she’s dreaming.I wonder what they dream about
do octopuses dream of electric eels?
JudgeMental said:
dv said:
Spiny Norman said:
This video of an octopus changing colours in her sleep might be an indication she’s dreaming.I wonder what they dream about
do octopuses dream of electric eels?
Heh
dv said:
Spiny Norman said:
This video of an octopus changing colours in her sleep might be an indication she’s dreaming.I wonder what they dream about
Sex?
JudgeMental said:
dv said:
Spiny Norman said:
This video of an octopus changing colours in her sleep might be an indication she’s dreaming.I wonder what they dream about
do octopuses dream of electric eels?
:)
Drinking Through a Tesla Valve Straw.
I’ve not seen life rafts deployed like this before. I guess it’s for an oil rig in the ocean … ?
Acoustic cameras can SEE sound.
A short photographic history of the Sphinx.
From the 1860’s …
From the 1880’s …
From 1929 …
Spiny Norman said:
This video of an octopus changing colours in her sleep might be an indication she’s dreaming.
Iontach! Amazing!
Handley Page Halifax B Mark II, 614 Sqn. RAF, showing anti-aircraft splinter holes sustained during a pathfinding operation over Europe.
Spiny Norman said:
Handley Page Halifax B Mark II, 614 Sqn. RAF, showing anti-aircraft splinter holes sustained during a pathfinding operation over Europe.
Gosh!
I wonder how it survived.
Michael V said:
Spiny Norman said:
Handley Page Halifax B Mark II, 614 Sqn. RAF, showing anti-aircraft splinter holes sustained during a pathfinding operation over Europe.
Gosh!
I wonder how it survived.
The aeroplane made it back to base, no info on the crew though. The pilot must have been a bit alive to get it home, at least. The plane was scrapped after that flight.
Spiny Norman said:
Michael V said:
Spiny Norman said:
Handley Page Halifax B Mark II, 614 Sqn. RAF, showing anti-aircraft splinter holes sustained during a pathfinding operation over Europe.
Gosh!
I wonder how it survived.
The aeroplane made it back to base, no info on the crew though. The pilot must have been a bit alive to get it home, at least. The plane was scrapped after that flight.
Hadley Page went on to build one of the V bombers, the Victor, beautiful aircraft.
Peak Warming Man said:
Spiny Norman said:
Michael V said:Gosh!
I wonder how it survived.
The aeroplane made it back to base, no info on the crew though. The pilot must have been a bit alive to get it home, at least. The plane was scrapped after that flight.
Hadley Page went on to build one of the V bombers, the Victor, beautiful aircraft.
They are indeed.
Peak Warming Man said:
Spiny Norman said:
Michael V said:Gosh!
I wonder how it survived.
The aeroplane made it back to base, no info on the crew though. The pilot must have been a bit alive to get it home, at least. The plane was scrapped after that flight.
Hadley Page went on to build one of the V bombers, the Victor, beautiful aircraft.
‘Made in Cricklewood’.
Pretty darn cool.
Madame Decourcelle the first female taxi driver in Paris, France, 1909.
Spiny Norman said:
Madame Decourcelle the first female taxi driver in Paris, France, 1909.
I can only imagine the misery of doing that job in winter.
party_pants said:
Spiny Norman said:
Madame Decourcelle the first female taxi driver in Paris, France, 1909.
I can only imagine the misery of doing that job in winter.
That’s what I was thinking. Pretty exposed in summer too.
sarahs mum said:
party_pants said:
Spiny Norman said:
Madame Decourcelle the first female taxi driver in Paris, France, 1909.
I can only imagine the misery of doing that job in winter.
That’s what I was thinking. Pretty exposed in summer too.
At least they hadn’t invented skin cancer back then. *
sarahs mum said:
party_pants said:
Spiny Norman said:
Madame Decourcelle the first female taxi driver in Paris, France, 1909.
I can only imagine the misery of doing that job in winter.
That’s what I was thinking. Pretty exposed in summer too.
I guess in the old days of horses drawing taxis, the driver had to be outside to hold the reigns and crack the whip etc. That paradigm carried over into the early days of automobiles before it was realised that the driver could be sheltered.
Michael V said:
Spiny Norman said:
Handley Page Halifax B Mark II, 614 Sqn. RAF, showing anti-aircraft splinter holes sustained during a pathfinding operation over Europe.
Gosh!
I wonder how it survived.
They didn’t hit the important bits.
1919- Seattle, Washington. Stacks of lumber drying at the Seattle Cedar Lumber Manufacturing Company’s mill in Ballard. Located just west of the Ballard Bridge, it was the largest in Ballard. At the mill, logs were cut into lumber which was then dried for at least nine months before being sold. The stacks of drying lumber were over 50 feet high. In this photo, a workman stands partway up one of the tall stacks of drying lumber.
More – https://bit.ly/3wzGkJo
Spiny Norman said:
1919- Seattle, Washington. Stacks of lumber drying at the Seattle Cedar Lumber Manufacturing Company’s mill in Ballard. Located just west of the Ballard Bridge, it was the largest in Ballard. At the mill, logs were cut into lumber which was then dried for at least nine months before being sold. The stacks of drying lumber were over 50 feet high. In this photo, a workman stands partway up one of the tall stacks of drying lumber.
More – https://bit.ly/3wzGkJo
WWI rations stack 
Spiny Norman said:
1919- Seattle, Washington. Stacks of lumber drying at the Seattle Cedar Lumber Manufacturing Company’s mill in Ballard. Located just west of the Ballard Bridge, it was the largest in Ballard. At the mill, logs were cut into lumber which was then dried for at least nine months before being sold. The stacks of drying lumber were over 50 feet high. In this photo, a workman stands partway up one of the tall stacks of drying lumber.
More – https://bit.ly/3wzGkJo
I wonder how they stacked it…
Tamb said:
Spiny Norman said:
1919- Seattle, Washington. Stacks of lumber drying at the Seattle Cedar Lumber Manufacturing Company’s mill in Ballard. Located just west of the Ballard Bridge, it was the largest in Ballard. At the mill, logs were cut into lumber which was then dried for at least nine months before being sold. The stacks of drying lumber were over 50 feet high. In this photo, a workman stands partway up one of the tall stacks of drying lumber.
More – https://bit.ly/3wzGkJo
WWI rations stack
Awesome stacking and with no hi-lift fork lifts too.
party_pants said:
Spiny Norman said:
1919- Seattle, Washington. Stacks of lumber drying at the Seattle Cedar Lumber Manufacturing Company’s mill in Ballard. Located just west of the Ballard Bridge, it was the largest in Ballard. At the mill, logs were cut into lumber which was then dried for at least nine months before being sold. The stacks of drying lumber were over 50 feet high. In this photo, a workman stands partway up one of the tall stacks of drying lumber.
More – https://bit.ly/3wzGkJo
I wonder how they stacked it…
By hand like the bloke standing on one of the steps.
A packing foam that’s made from corn starch, and it disintegrates in water. Pretty darn cool.
26 March 1949. Death of Albert William Stevens. American balloonist and aerial photographer who took the first photograph of Earth in a way that the horizon’s curvature was visible (30 December 1930) and the first photograph of the Moon’s shadow on Earth during a solar eclipse.
Spiny Norman said:
26 March 1949. Death of Albert William Stevens. American balloonist and aerial photographer who took the first photograph of Earth in a way that the horizon’s curvature was visible (30 December 1930) and the first photograph of the Moon’s shadow on Earth during a solar eclipse.
Curved my arse.
Peak Warming Man said:
Spiny Norman said:
26 March 1949. Death of Albert William Stevens. American balloonist and aerial photographer who took the first photograph of Earth in a way that the horizon’s curvature was visible (30 December 1930) and the first photograph of the Moon’s shadow on Earth during a solar eclipse.
Curved my arse.
My arse is more curved.
roughbarked said:
Peak Warming Man said:
Spiny Norman said:
26 March 1949. Death of Albert William Stevens. American balloonist and aerial photographer who took the first photograph of Earth in a way that the horizon’s curvature was visible (30 December 1930) and the first photograph of the Moon’s shadow on Earth during a solar eclipse.
Curved my arse.
My arse is more curved.
Makes me think of Benjamin Nankervis.
Also know as Bendyourbum N’curveyourarse.
Spiny Norman said:
26 March 1949. Death of Albert William Stevens. American balloonist and aerial photographer who took the first photograph of Earth in a way that the horizon’s curvature was visible (30 December 1930) and the first photograph of the Moon’s shadow on Earth during a solar eclipse.
Full sized image; all the details can be seen:
https://collections.library.yale.edu/iiif/2/15817181/full/full/0/default.jpg
or download from:
https://collections.library.yale.edu/catalog/15814754
Michael V said:
Spiny Norman said:
26 March 1949. Death of Albert William Stevens. American balloonist and aerial photographer who took the first photograph of Earth in a way that the horizon’s curvature was visible (30 December 1930) and the first photograph of the Moon’s shadow on Earth during a solar eclipse.
Full sized image; all the details can be seen:
https://collections.library.yale.edu/iiif/2/15817181/full/full/0/default.jpg
or download from:
https://collections.library.yale.edu/catalog/15814754
Thanks Michael.
Saved me a Binge :)
The Rev Dodgson said:
Michael V said:
Spiny Norman said:
26 March 1949. Death of Albert William Stevens. American balloonist and aerial photographer who took the first photograph of Earth in a way that the horizon’s curvature was visible (30 December 1930) and the first photograph of the Moon’s shadow on Earth during a solar eclipse.
Full sized image; all the details can be seen:
https://collections.library.yale.edu/iiif/2/15817181/full/full/0/default.jpg
or download from:
https://collections.library.yale.edu/catalog/15814754
Thanks Michael.
Saved me a Binge :)
No worries.
:)
Why is All Life Based on Carbon and Not Silicon? Three Startling Reasons.
https://www.youtube.com/watch?v=kAFC4RY1cKQ
Is there just ONE ELECTRON in the universe?! (spoiler: no)
Mr Norman, sir. If I may ask after one of your potential occasional interests.
Do you follow any of those live Youtube aviation live streams from airports?
e.g This one. https://www.youtube.com/watch?v=uf5niL33IgQ
If so, do you have a favourite?
Woodie said:
Mr Norman, sir. If I may ask after one of your potential occasional interests.Do you follow any of those live Youtube aviation live streams from airports?
e.g This one. https://www.youtube.com/watch?v=uf5niL33IgQ
If so, do you have a favourite?
Nah, just the occasional highlights that some people post.
FWIW I was based in Manchester for a while.
Spiny Norman said:
Woodie said:
Mr Norman, sir. If I may ask after one of your potential occasional interests.Do you follow any of those live Youtube aviation live streams from airports?
e.g This one. https://www.youtube.com/watch?v=uf5niL33IgQ
If so, do you have a favourite?
Nah, just the occasional highlights that some people post.
FWIW I was based in Manchester for a while.
Ahhhh… Manchester is one of the better ones. SydSquad do alright, and even Wellington, specially if it’s windy. Bit if amusement for a while and combine it with Flight Tracker.
Spiny Norman said:
Is there just ONE ELECTRON in the universe?! (spoiler: no)
Just watched it, but it didn’t seem to answer the original reason for the question.
“If electrons have no mass, then they don’t experience time, and are therefore everywhere all at once.”
The guy in the vid is talking about time travel, which isn’t in the question.
Kingy said:
Spiny Norman said:Is there just ONE ELECTRON in the universe?! (spoiler: no)
Just watched it, but it didn’t seem to answer the original reason for the question.
“If electrons have no mass, then they don’t experience time, and are therefore everywhere all at once.”
The guy in the vid is talking about time travel, which isn’t in the question.
electrons do have mass.
JudgeMental said:
Kingy said:
Spiny Norman said:Is there just ONE ELECTRON in the universe?! (spoiler: no)
Just watched it, but it didn’t seem to answer the original reason for the question.
“If electrons have no mass, then they don’t experience time, and are therefore everywhere all at once.”
The guy in the vid is talking about time travel, which isn’t in the question.
electrons do have mass.
I’ve heard this conjecture about photons which are definitely without mass.
Witty Rejoinder said:
JudgeMental said:
Kingy said:Just watched it, but it didn’t seem to answer the original reason for the question.
“If electrons have no mass, then they don’t experience time, and are therefore everywhere all at once.”
The guy in the vid is talking about time travel, which isn’t in the question.
electrons do have mass.
I’ve heard this conjecture about photons which are definitely without mass.
me too, I guess with photons travelling at lightspeed time becomes zero. though it doesn’t really as you can’t apply the Lorenz transform to photons.
26 March 1974. Concorde 101 set a speed record of Mach 2.23.
Spiny Norman said:
26 March 1974. Concorde 101 set a speed record of Mach 2.23.
And with a steam-gauge cockpit.
captain_spalding said:
Spiny Norman said:
26 March 1974. Concorde 101 set a speed record of Mach 2.23.
And with a steam-gauge cockpit.
I like them. :)
It was a most remarkable aircraft. Only a few military aircraft could catch it, and only for a short time.
Spiny Norman said:
captain_spalding said:
Spiny Norman said:
26 March 1974. Concorde 101 set a speed record of Mach 2.23.
And with a steam-gauge cockpit.
I like them. :)
It was a most remarkable aircraft. Only a few military aircraft could catch it, and only for a short time.
One of which was the Lightning.
Spiny Norman said:
26 March 1974. Concorde 101 set a speed record of Mach 2.23.
They were such a beautiful plane.
buffy said:
Spiny Norman said:
26 March 1974. Concorde 101 set a speed record of Mach 2.23.
They were such a beautiful plane.
Not so beautiful when you lived under the take-off flight path!
Woodie said:
Spiny Norman said:
Woodie said:
Mr Norman, sir. If I may ask after one of your potential occasional interests.Do you follow any of those live Youtube aviation live streams from airports?
e.g This one. https://www.youtube.com/watch?v=uf5niL33IgQ
If so, do you have a favourite?
Nah, just the occasional highlights that some people post.
FWIW I was based in Manchester for a while.
Ahhhh… Manchester is one of the better ones. SydSquad do alright, and even Wellington, specially if it’s windy. Bit if amusement for a while and combine it with Flight Tracker.
These streams – https://www.youtube.com/@AirlinersLive – are quite good
buffy said:
Spiny Norman said:
26 March 1974. Concorde 101 set a speed record of Mach 2.23.
They were such a beautiful plane.
A great shame no more were ordered after the initial batch, as the next model would have included leading-edge slats on the wings to reduce take-off & landing speeds, and much improved engines that did not require afterburners at all. So most of the noise complaints about them in & out of airports would have been reduced somewhat.
The Rev Dodgson said:
buffy said:
Spiny Norman said:
26 March 1974. Concorde 101 set a speed record of Mach 2.23.
They were such a beautiful plane.
Not so beautiful when you lived under the take-off flight path!
I remember going to Tullamarine to see the Concorde arrive. Living in Box Hill North the planes were always going over us, but not in the actual landing and taking off bit. Planes were just part of the skyscape through my childhood. I don’t remember thinking about noise really. I remember my mother proclaiming that Pugs were excellent plane scarers as none had ever landed in our backyard while she had a Pug there.
AussieDJ said:
Woodie said:
Spiny Norman said:Nah, just the occasional highlights that some people post.
FWIW I was based in Manchester for a while.
Ahhhh… Manchester is one of the better ones. SydSquad do alright, and even Wellington, specially if it’s windy. Bit if amusement for a while and combine it with Flight Tracker.
These streams – https://www.youtube.com/@AirlinersLive – are quite good
Turkish Airline just took off.
Peak Warming Man said:
AussieDJ said:
Woodie said:Ahhhh… Manchester is one of the better ones. SydSquad do alright, and even Wellington, specially if it’s windy. Bit if amusement for a while and combine it with Flight Tracker.
These streams – https://www.youtube.com/@AirlinersLive – are quite good
Turkish Airline just took off.
Virgin Atlantic A351 coming in soon.
Over.
The Rev Dodgson said:
buffy said:
Spiny Norman said:
26 March 1974. Concorde 101 set a speed record of Mach 2.23.
They were such a beautiful plane.
Not so beautiful when you lived under the take-off flight path!
Speaking of living under the flight path, I had a chat to Bulgarian Umbrella this past week. He lives at the end of Perth Airport, and it’s pretty loud there at times.
One of his mechanic customers paid for two tickets and accommodation for BU to go to Philip Island as a mechanic/pit crew on his race car. As it turned out, the car ran perfectly so BU was just a spectator the whole time. Much beer was consumed and good times were had. Lucky bugger.
buffy said:
The Rev Dodgson said:
buffy said:They were such a beautiful plane.
Not so beautiful when you lived under the take-off flight path!
I remember going to Tullamarine to see the Concorde arrive. Living in Box Hill North the planes were always going over us, but not in the actual landing and taking off bit. Planes were just part of the skyscape through my childhood. I don’t remember thinking about noise really. I remember my mother proclaiming that Pugs were excellent plane scarers as none had ever landed in our backyard while she had a Pug there.
At the time they were being developed we lived in Camberley, which is just north of the Farnborough airfield where the initial testing was carried out. We got some great views, but the noise was incredible.
Once they went into service and moved to Heathrow, no problem at all.
buffy said:
The Rev Dodgson said:
buffy said:They were such a beautiful plane.
Not so beautiful when you lived under the take-off flight path!
I remember going to Tullamarine to see the Concorde arrive. Living in Box Hill North the planes were always going over us, but not in the actual landing and taking off bit. Planes were just part of the skyscape through my childhood. I don’t remember thinking about noise really. I remember my mother proclaiming that Pugs were excellent plane scarers as none had ever landed in our backyard while she had a Pug there.
They were all loud back then.
I remember being at Curtin Uni in the early 90s. Some planes coming overhead were so loud the tutors had to stop talking for a few moments while they passed over, especially the 4 engine planes.. More than a decade later I got a job only a few km away, and still near the flight-path, we hardly got any 4 engine planes then, and the small twin engine ones were remarkably quiet, hardly any louder than the busy traffic on the highway nearby.
The Rev Dodgson said:
buffy said:
The Rev Dodgson said:Not so beautiful when you lived under the take-off flight path!
I remember going to Tullamarine to see the Concorde arrive. Living in Box Hill North the planes were always going over us, but not in the actual landing and taking off bit. Planes were just part of the skyscape through my childhood. I don’t remember thinking about noise really. I remember my mother proclaiming that Pugs were excellent plane scarers as none had ever landed in our backyard while she had a Pug there.
At the time they were being developed we lived in Camberley, which is just north of the Farnborough airfield where the initial testing was carried out. We got some great views, but the noise was incredible.
Once they went into service and moved to Heathrow, no problem at all.
Were they as loud as Dr. Karls shirts?
party_pants said:
buffy said:
The Rev Dodgson said:Not so beautiful when you lived under the take-off flight path!
I remember going to Tullamarine to see the Concorde arrive. Living in Box Hill North the planes were always going over us, but not in the actual landing and taking off bit. Planes were just part of the skyscape through my childhood. I don’t remember thinking about noise really. I remember my mother proclaiming that Pugs were excellent plane scarers as none had ever landed in our backyard while she had a Pug there.
They were all loud back then.
I remember being at Curtin Uni in the early 90s. Some planes coming overhead were so loud the tutors had to stop talking for a few moments while they passed over, especially the 4 engine planes.. More than a decade later I got a job only a few km away, and still near the flight-path, we hardly got any 4 engine planes then, and the small twin engine ones were remarkably quiet, hardly any louder than the busy traffic on the highway nearby.
In the eighties we had these coming in low into Essendon Airport: noisiest plane of all.
Peak Warming Man said:
Peak Warming Man said:
AussieDJ said:These streams – https://www.youtube.com/@AirlinersLive – are quite good
Turkish Airline just took off.
Virgin Atlantic A351 coming in soon.
Over.
You need to hang around for the Emirates A380 to take off, Mr Man. It’s the highlight of their day.😎
Witty Rejoinder said:
party_pants said:
buffy said:I remember going to Tullamarine to see the Concorde arrive. Living in Box Hill North the planes were always going over us, but not in the actual landing and taking off bit. Planes were just part of the skyscape through my childhood. I don’t remember thinking about noise really. I remember my mother proclaiming that Pugs were excellent plane scarers as none had ever landed in our backyard while she had a Pug there.
They were all loud back then.
I remember being at Curtin Uni in the early 90s. Some planes coming overhead were so loud the tutors had to stop talking for a few moments while they passed over, especially the 4 engine planes.. More than a decade later I got a job only a few km away, and still near the flight-path, we hardly got any 4 engine planes then, and the small twin engine ones were remarkably quiet, hardly any louder than the busy traffic on the highway nearby.
In the eighties we had these coming in low into Essendon Airport: noisiest plane of all.
Oh, no. The noisiest plane award goes to the Republic XF-84H Thunderscreech.
Peak Warming Man said:
The Rev Dodgson said:
buffy said:I remember going to Tullamarine to see the Concorde arrive. Living in Box Hill North the planes were always going over us, but not in the actual landing and taking off bit. Planes were just part of the skyscape through my childhood. I don’t remember thinking about noise really. I remember my mother proclaiming that Pugs were excellent plane scarers as none had ever landed in our backyard while she had a Pug there.
At the time they were being developed we lived in Camberley, which is just north of the Farnborough airfield where the initial testing was carried out. We got some great views, but the noise was incredible.
Once they went into service and moved to Heathrow, no problem at all.
Were they as loud as Dr. Karls shirts?
Even louder.
(Just visited my old house on Google maps and did the walk to school on street view.
Hardly changed at all, except all the roads are much narrower now.
Witty Rejoinder said:
party_pants said:
buffy said:I remember going to Tullamarine to see the Concorde arrive. Living in Box Hill North the planes were always going over us, but not in the actual landing and taking off bit. Planes were just part of the skyscape through my childhood. I don’t remember thinking about noise really. I remember my mother proclaiming that Pugs were excellent plane scarers as none had ever landed in our backyard while she had a Pug there.
They were all loud back then.
I remember being at Curtin Uni in the early 90s. Some planes coming overhead were so loud the tutors had to stop talking for a few moments while they passed over, especially the 4 engine planes.. More than a decade later I got a job only a few km away, and still near the flight-path, we hardly got any 4 engine planes then, and the small twin engine ones were remarkably quiet, hardly any louder than the busy traffic on the highway nearby.
In the eighties we had these coming in low into Essendon Airport: noisiest plane of all.
what the hell is that? It’s hideous..
party_pants said:
Witty Rejoinder said:
party_pants said:They were all loud back then.
I remember being at Curtin Uni in the early 90s. Some planes coming overhead were so loud the tutors had to stop talking for a few moments while they passed over, especially the 4 engine planes.. More than a decade later I got a job only a few km away, and still near the flight-path, we hardly got any 4 engine planes then, and the small twin engine ones were remarkably quiet, hardly any louder than the busy traffic on the highway nearby.
In the eighties we had these coming in low into Essendon Airport: noisiest plane of all.
what the hell is that? It’s hideous..
https://en.wikipedia.org/wiki/Armstrong_Whitworth_AW.660_Argosy
https://www.youtube.com/watch?v=71is05gstFE
X-59 QueSST: NASA Finally Tests its New Supersonic X-Plane
The Lockheed Martin X-59 QueSST (“Quiet SuperSonic Technology”) is an American experimental supersonic aircraft being developed at Skunk Works for NASA’s Low-Boom Flight Demonstrator project. Preliminary design started in February 2016, with the X-59 to be delivered to NASA in 2021 for flight testing in 2022. It is expected to cruise at Mach 1.42 (1,510 km/h; 937 mph) at an altitude of 55,000 ft (16,800 m), creating a low 75 Perceived Level decibel (PLdB) thump to evaluate supersonic transport acceptability.
party_pants said:
Witty Rejoinder said:
party_pants said:They were all loud back then.
I remember being at Curtin Uni in the early 90s. Some planes coming overhead were so loud the tutors had to stop talking for a few moments while they passed over, especially the 4 engine planes.. More than a decade later I got a job only a few km away, and still near the flight-path, we hardly got any 4 engine planes then, and the small twin engine ones were remarkably quiet, hardly any louder than the busy traffic on the highway nearby.
In the eighties we had these coming in low into Essendon Airport: noisiest plane of all.
what the hell is that? It’s hideous..
SuperGuppys aren’t much better.
JudgeMental said:
https://www.youtube.com/watch?v=71is05gstFEX-59 QueSST: NASA Finally Tests its New Supersonic X-Plane
The Lockheed Martin X-59 QueSST (“Quiet SuperSonic Technology”) is an American experimental supersonic aircraft being developed at Skunk Works for NASA’s Low-Boom Flight Demonstrator project. Preliminary design started in February 2016, with the X-59 to be delivered to NASA in 2021 for flight testing in 2022. It is expected to cruise at Mach 1.42 (1,510 km/h; 937 mph) at an altitude of 55,000 ft (16,800 m), creating a low 75 Perceived Level decibel (PLdB) thump to evaluate supersonic transport acceptability.
Yes. It is only now that a few compsnies are looking at new supersonic designs. To be much slower of course than Concorde (around Mach 1.2 -1.8), hoped to be more acceptable in sonic boom and overall noise.
Scientists accidentally create the world’s lightest paint by mimicking Mother Nature.
Spiny Norman said:
Scientists accidentally create the world’s lightest paint by mimicking Mother Nature.
“Structural colors don’t fade in the sun, meaning repainting is only needed when you want to change colors.”
Well, there’s the fatal flaw in that invention. We won’t be seeing ‘structural colour’ on the shelves at Bunnings any time soon. Or ever.
captain_spalding said:
Spiny Norman said:
Scientists accidentally create the world’s lightest paint by mimicking Mother Nature.
“Structural colors don’t fade in the sun, meaning repainting is only needed when you want to change colors.”
Well, there’s the fatal flaw in that invention. We won’t be seeing ‘structural colour’ on the shelves at Bunnings any time soon. Or ever.
start the disruption shop
captain_spalding said:
Spiny Norman said:
Scientists accidentally create the world’s lightest paint by mimicking Mother Nature.“Structural colors don’t fade in the sun, meaning repainting is only needed when you want to change colors.”
Well, there’s the fatal flaw in that invention. We won’t be seeing ‘structural colour’ on the shelves at Bunnings any time soon. Or ever.
Oh, I don’t know. If the binder fails in the sun (as binders do and are designed to do now) then it’s all good for paint manufacturers.
I see that they consider “ochre” a heavy metal now.
A Facepalm friend of mine is a world-renowned technical drawing expert. He gets invited to draw many top-level racing cars.
Spiny Norman said:
A Facepalm friend of mine is a world-renowned technical drawing expert. He gets invited to draw many top-level racing cars.
Oops .. And now to add the pictures …
Spiny Norman said:
Spiny Norman said:
A Facepalm friend of mine is a world-renowned technical drawing expert. He gets invited to draw many top-level racing cars.Oops .. And now to add the pictures …
Apart from the invitations, and the kudos, does it reward him sufficiently?
captain_spalding said:
Spiny Norman said:
Spiny Norman said:
A Facepalm friend of mine is a world-renowned technical drawing expert. He gets invited to draw many top-level racing cars.Oops .. And now to add the pictures …
Apart from the invitations, and the kudos, does it reward him sufficiently?
I think so.
Spiny Norman said:
captain_spalding said:
Spiny Norman said:Oops .. And now to add the pictures …
Apart from the invitations, and the kudos, does it reward him sufficiently?
I think so.
That’s good. He does have quite a talent for it.
captain_spalding said:
Spiny Norman said:
captain_spalding said:Apart from the invitations, and the kudos, does it reward him sufficiently?
I think so.
That’s good. He does have quite a talent for it.
Here’s a bit of info on him.
https://www.escapeintolife.com/artist-watch/tony-matthews/
Spiny Norman said:
captain_spalding said:
Spiny Norman said:I think so.
That’s good. He does have quite a talent for it.
Here’s a bit of info on him.
https://www.escapeintolife.com/artist-watch/tony-matthews/
I do like a good cut-away drawing, and gosh, those are the top shelf stuff.
captain_spalding said:
Spiny Norman said:
captain_spalding said:That’s good. He does have quite a talent for it.
Here’s a bit of info on him.
https://www.escapeintolife.com/artist-watch/tony-matthews/
I do like a good cut-away drawing, and gosh, those are the top shelf stuff.
I remember he was invited by Mario Illien of Ilmor engines to draw, in secret, the special one-off engine for Roger Penske’s cars that were going to run in an upcoming Indy 500. Like the entire development of that engine, the drawing was done in complete secrecy and only released after the race was run and won by a Penske car.
Then they changed the rules so that engine wouldn’t be competitive anymore.
More on this – https://forums.autosport.com/topic/192539-excerpt-from-beast-the-top-secret-ilmor-penske-engine-that-shook-the-indy-500/
The Next Generation of Ionic Plasma Thrusters (BSI MARK 2)
1915, transporting a locomotive across the Rio Grande Canyon in New Mexico
“This is during the construction of the Elephant Butte Dam. The main function of the cables was to haul huge buckets of concrete into place to be emptied into the dam forms. They may have just been showing off with this locomotive – or it could have been the easiest way to put it in place on the other side using the existing mechanism.”
Spiny Norman said:
1915, transporting a locomotive across the Rio Grande Canyon in New Mexico“This is during the construction of the Elephant Butte Dam. The main function of the cables was to haul huge buckets of concrete into place to be emptied into the dam forms. They may have just been showing off with this locomotive – or it could have been the easiest way to put it in place on the other side using the existing mechanism.”
‘The Elephant Butte Dam’.
Perhaps also known as ‘the Pachyderm’s Posterior Dam’?
captain_spalding said:
Spiny Norman said:
1915, transporting a locomotive across the Rio Grande Canyon in New Mexico“This is during the construction of the Elephant Butte Dam. The main function of the cables was to haul huge buckets of concrete into place to be emptied into the dam forms. They may have just been showing off with this locomotive – or it could have been the easiest way to put it in place on the other side using the existing mechanism.”
‘The Elephant Butte Dam’.
Perhaps also known as ‘the Pachyderm’s Posterior Dam’?
Sounds about it.
CERN checks Particle Physics Anomaly, A New Explanation for the Interstellar Object ‘Oumuamua & More.
Spitfire’s suitably cleaned external fuel tank filled with beer from barrels before being flown to Allied forces in Normandy – June/July 1944.
Spiny Norman said:
Spitfire’s suitably cleaned external fuel tank filled with beer from barrels before being flown to Allied forces in Normandy – June/July 1944.
Heh. But cleaning out the petrol taint must have been a labour of Hercules.
Spiny Norman said:
Spitfire’s suitably cleaned external fuel tank filled with beer from barrels before being flown to Allied forces in Normandy – June/July 1944.
Looks like the spit could do with a wash as well.
From ‘Your Daily Dose Of Internet”. I found the part on Arabic numbers interesting, I never knew that!
“It’s not possible to take such a photograph anymore, as the buildings outside block the sun rays.” Grand Central, New York City, Photo taken in 1929.
Spiny Norman said:
“It’s not possible to take such a photograph anymore, as the buildings outside block the sun rays.” Grand Central, New York City, Photo taken in 1929.
Wow, awesome photo.
Spiny Norman said:
“It’s not possible to take such a photograph anymore, as the buildings outside block the sun rays.” Grand Central, New York City, Photo taken in 1929.
That’s the 20th century for you. There were some spectacular spaces that didn’t last long.
Can water solve a maze?
Spiny Norman said:
Can water solve a maze?
(upbeat music) – So many people sent me this simulation of water pouring through a maze by Bergman Joe.
And it makes sense that you sent it to me ‘cause this is the kind of thing that I would make for real.
So of course when I saw it, I had to make it for real.
I actually made four mazes in total, a simpler one and a more complex one, and I also made large versions of those two mazes.
Let’s look at the small mazes first, because when you see what happens with those, it’ll be obvious why I made the larger versions.
And by the way, this simulated version does eventually fill up completely with water and it’s very satisfying.
But if you want to see that ending, you’ll have to go to Bergman Joe’s profile, link in the description.
Okay, so here’s the simpler maze first.
And what we find brilliantly is that the water simply solves the maze without taking any wrong turns at all.
And actually that makes sense because every time the water comes up against an incorrect path, well, the air inside the path has nowhere to go.
So while the water is trying to push itself into the incorrect path, the air pressure inside that closed space is pushing back.
If I had to characterize this as a maze solving algorithm, the algorithm would be something like, try all paths simultaneously using air pressure, which is cool.
When the tank runs out it’s fun to watch the air bubbles solve the maze as well.
And actually it’s quite different to Bergman Joe’s simulation where the water eventually tries every path, even after it’s found the solution.
What about the more complex maze? Well, first one, I chose the maze where the solve path takes the player all the way back up to the very top again.
Well, already something seems to be amiss, like there shouldn’t be any water here, or at least not yet.
And there shouldn’t be any water here either, or at least there shouldn’t be if this maze is following the same rules as the previous maze.
So what’s going on here? Well, the explanation is quite simple.
I just didn’t build a watertight maze.
The reason I didn’t build a watertight maze is because it’s really difficult.
Like I’ve got three layers of laser cut acrylic here, a black layer, that’s the maze itself, and two clear layers sandwiching the black layer.
And the best way to bond these layers together is with solvent that literally dissolves the acrylic on both sides so that they weld together when the solvent evaporates.
That’s easy enough when you’re bonding the black layer to the first clear layer.
The solvent simply seeps between the two bits of acrylic.
But then when you put the second clear layer on top, well, how’d you get the solvent in there? A fun side note.
One thing you realize very quickly when you laser cut a maze is that mazes are always made of two separate pieces.
I mean, it’s obvious when you think about it, but it’s quite cool to see.
Actually a maze becomes very easy to solve if you color the two parts separately.
But anyway, why did I build the larger mazes? Well, look, I stated that the reason water doesn’t go in here is because there is air in the way.
But why doesn’t the air just bubble out so the water can get in? Well, it’s because of surface tension.
The air is unable to bubble past to the surface tension of the water.
So if we make the maze bigger until surface tension isn’t significant anymore, we should expect the maze to be solved in a different way.
We should expect the water to use a different solving algorithm.
Maybe something closer to what Bergman Joe showed in his simulation.
By the way, for the larger maze, I had the genius idea of laser cutting thin channels into the outer clear acrylic so I could squirt the solvent in once the clear sheet was in place.
But anyway, here’s the simple maze in action.
And you can see without the power of surface tension, the water finds the lowest possible place it can go to.
Sometimes momentum plays a part so it will fill certain paths before others as a result.
But broadly without surface tension, the water tries more paths before finding the correct one.
If I had to describe it in terms of a solving algorithm, it would be something like, always take the path that takes you lower until you can’t anymore, and then take the next lowest path.
We’ll get to the more complex maze in a second.
But first, let’s compare this to Bergman Joe’s simulation.
More of the maze becomes full of water, but it doesn’t fill up like it does in Bergman Joe’s.
Like water can never get into this region, or this region, or any of these regions.
And you can see why.
Again, it’s air pressure.
Except it’s not surface tension that’s holding the water back, it’s just the geometry of the thing.
Like air would have to go down before it could go up in this scenario.
So it simply doesn’t because air is less dense than water.
So my hunch is that what’s going on in Bergman Joe’s simulation is that there is no air in his simulation.
It’d be very difficult for me to recreate that with my setup.
Like even if I could do this in a vacuum, well, in a vacuum the water would just boil.
Maybe I could try it with a liquid that doesn’t boil in a vacuum.
That sounds hard.
Here’s the more complex maze.
There is a slight leak here, but it’s water leaking from the tank to the outside world.
I don’t think there’s any significant leaks happening within the maze itself, which is a huge relief.
And just like with the simpler maze, the water goes to all the lowest parts it can do before it’s locked out by the geometry.
They say that if you are ever stuck in a maze, just put one hand on the wall and keep walking forwards and you’ll eventually get out the maze.
Though, I suppose if there are two possible paths through the maze, then the maze will necessarily be made of three parts instead of the two parts of acrylic that I showed you before.
And if you happen to put your hand on the middle part then you’ll just be walking around forever.
But anyway, one thing I really wasn’t expecting with this water maze was that the whole thing grinds to a halt when there’s still water left in the tank.
And I think that’s because there are lots of little bits of surface tension all around the maze that need to be overcome.
But together, those little bits of surface tension add up to enough resistance so that the pressure of water from the tank just isn’t enough to force everything through.
Like there’s a little bit of surface tension here that’s preventing the water coming over this lip.
Another bit of surface tension here, here, here, here, here.
They’re all resisting the flow of water slightly, but together they present a significant amount of resistance.
It’s a bit like those coin games.
You know, you roll your coin in, it gets pushed off the first shelf, but then nothing happens on the second shelf.
Or maybe something does fall off the second shelf, but there’s no way anything’s happening on the third shelf.
The final thing I want to show you is what happens if I change the color of the water once the maze is solved.
It’s fun, isn’t it? You can see that the red dye solves the maze and slowly starts to creep into those stagnant areas.
So there you go, water can solve a maze.
It doesn’t look anything like Bergman Joe’s simulation, not that Bergman Joe’s simulation is wrong, it’s just simulating something that I couldn’t recreate here in my studio.
When I was given careers advice at school, I can tell you for sure that making science videos on YouTube was not one of the suggestions that they made, mainly because YouTube didn’t exist back then.
But also I feel like they probably weren’t asking the right questions.
So how do you find good careers advice? Well, for people that are interested in finding a fulfilling career that makes a difference in the world, then I strongly recommend checking out the sponsor of this video 80,000 Hours.
And I’ll say at the top that what they offer is absolutely free.
They’re a nonprofit organization that focuses on helping people find careers that solve the world’s biggest problems.
And there are two things that I really like about it.
The first is that it’s evidence-based.
Their insights come from 10 years of research alongside academics at Oxford University.
The second thing I like is just the sheer breadth of different tools available on their website.
You could start by looking at their problem profiles, for example.
Those are the things in the world that need fixing.
Or you could start with their decision-making tools that help you to find a career based on what you are like.
Or you can dive straight into looking at specific careers.
There’s even a podcast if you enjoy learning that way.
And then there’s the job board, which they have curated based on what their research says are high-impact careers.
The best way to get started is to go to 80,000 dollars.
org/steve to be sent a free copy of their in-depth career guide in which you can learn about what makes a high-impact career, get new ideas for impactful paths, make a new plan based on what you’ve learned, and put it into action.
The link is also in the description so check out 80,000 Hours today.
I hope you enjoyed this video.
If you did, don’t forget to hit subscribe, And the algorithm thinks you’ll enjoy this video next.
(upbeat music)
“Genius Liquid Battery Will End Lithium Cells Forever”
Maybe …. but they certainly show potential for various devices/machines.
Spiny Norman said:
“Genius Liquid Battery Will End Lithium Cells Forever”
Maybe …. but they certainly show potential for various devices/machines.
Imagine you were running low on battery in an electric car, but instead of having to plug in to recharge and wait for the battery to refill, you could instead fill up at a pump in a matter of minutes with an electrically charged fluid, much like you would refill fuel for a combustion engine car.
In this video, we’ll see how this is possible and see what it could mean for electric mobility by replacing the need of lithium ion battery packs.
To understand this breakthrough liquid battery, it is first useful to understand the two technologies that it is based on.
The first of these is the standard lithium ion battery, commonly found in consumer electronics and electric vehicles.
And the second is the redox flow battery, which stores the energy in the liquid electrolytes and is being used more and more in grid scale energy storage.
Lithium ion batteries consist of a cathode, an anode and a separator, which are all placed in an electrolyte fluid.
When charging, electrons move from the cathode to the anode through an electrical circuit, and lithium ions move from the cathode into the anode material, storing energy.
When discharging, the process is reversed, releasing stored energy to power devices or vehicles.
Something important to note here is the reason lithium ion batteries can store so much energy is because of the specially selected cathode and anode materials.
On the other hand, we have redox flow batteries such as the Vanadium redox flow battery, which consists of two tanks containing liquid electrolyte solutions.
The electrolyte fluids also serve as the anode and cathode because they have vanadium dissolved within them.
This idea of a flow battery is the foundation of the new liquid battery breakthrough.
However, it has one problem that ideas from the lithium ion batteries from before can help solve.
But as we delve further into the world of electric vehicles, it’s important to remember that our online privacy and security needs just as much attention.
Which is why I use Private Internet Access, the world’s most transparent VPN provider that will elevate your online journey on your phone, computer, tablet or console.
The VPN works by hiding your IP address through an encrypted tunnel, helping to keep your digital life secure.
Just like how electric vehicles are helping us to unlock a more sustainable world, private Internet access opens up a universe of entertainment options.
Compatible with all major streaming services.
This VPN allows you to access more content than ever, no matter where you are.
You can also protect an unlimited number of devices at the same time with just one subscription.
And if you ever need help, their 24/7 customer support is always available.
Their no logs policy has been verified in court, ensuring that your data is never recorded or stored.
The best part is, if you use my link below, you can get an 83% discount when you sign up.
That’s just $2.03 a month, and you can also get four months completely for free.
So, sign up now and thanks to private internet access for supporting this video.
Now back to flow batteries like the Vanadium redox flow battery we saw earlier.
The big problem with them that means they can’t be used in electric vehicles is their low energy density.
For comparison, a Vanadium flow battery stores about one 10th of the energy of a lithium ion battery of a similar size and weight.
Thankfully, the breakthrough from a company called Inflow Energy, which is a spin out from the Illinois Institute of Technology, can change that.
Remember I said the reason conventional lithium ion batteries can store so much energy is because of the specially selected cathode and anode materials?
Well, the reason Vanadium redox flow batteries are poor at storing energy is because it isn’t possible to dissolve enough vanadium into the electrolyte fluid, which is important as vanadium is the active material that stores the energy.
This is why Influit Energy is instead suspending highly energy dense materials as nanoparticles in the electrolyte fluid with their scientific papers stating this can increase the energy density by 30 times.
This means their nanofluid flow batteries are even more energy dense than current lithium ion batteries and can benefit from extremely fast recharging or should I say refilling.
So let’s look at this breakthrough energy system in some more detail.
The idea of suspending electrode particles inside the electrolytes of a redox flow battery has been explored before, but a major issue has been that it makes the electrolyte too thick.
Influit energy.
Say they have solved this by using nanoparticle which have modified surfaces to prevent the particles collecting together or sinking to the bottom.
Because the active materials don’t have to dissolve much more energy dense materials like those used in current lithium ion batteries can be used.
If we look at the anolyte and catholyte fluids that store the energy, we can see they are roughly the viscosity of engine oil.
Another benefit of this is that the electrolyte fluid is also non-flammable, potentially making it safer in the event of a spillage.
Though, I would be interested to see what happens if the analyte and catholyte were to be mixed.
As one of their publications with NASA states, it would result in thermal reactions.
In terms of operation, the nanoparticle flow battery is similar to the Vanadium flow battery we saw earlier, except the electrons and ions are exchanged between the highly energy dense particles suspended within the electrolytes.
Once the electrons have flowed through the required system, the discharged electrolyte is stored in the discharge tank.
Say you wanted to recharge or refill your nanoparticle battery.
You are left with two options.
Firstly, you could just plug it into an electricity source and recharge it like you would a conventional electric vehicle.
Or you could pump out the discharged electrolyte fluids and put in charged ones using the four nozzle pump designed by Influit Energy.
This would also then enable refilling stations to slowly recharge the electrolyte fluid you just emptied out using intermittent renewable energy sources like wind and solar.
Now let’s see what they’ve achieved towards this big vision.
Influit Energy has been working with NASA and DARPA, among others, and the key prototype milestones appear to be their Gen One and Gen Two battery systems.
Judging by their published work and messages I’ve had with the CEO, it seems like the Gen One system requirements have been achieved, which see a 23% increase in volumetric energy density over conventional lithium ion batteries.
I have also been informed that they developed a drop in battery system for an electric utility vehicle that operated back in June of 2022.
Though publicly available, details for this are yet to be released.
A very small scale demonstrator vehicle has been shown driving around their lab, though, so I’m excited to see some footage of this in full scale vehicles.
The Gen Two nano-electrofuel battery prototype is set to be completed at the end of 2023 and promises to deliver energy densities four to five times higher than conventional lithium ion battery systems.
The Gen Two battery system also promises to reduce the cost of energy storage to below $90 per kilowatt hour, compared to $140 per kilowatt hour for conventional lithium ion battery systems and the Gen One system.
Apparently, this will be achieved by utilizing an air cathode, which is a concept Tesla has been looking into for a number of years now.
One key challenge for the team at Influit Energy is achieving high efficiencies.
This is because there are some additional losses from using the pumps to move the electrolyte fluids.
Therefore, the best way to improve this is to use highly efficient pumps and to keep the viscosity of the fluid relatively low while still keeping high nanoparticle densities.
Clearly, the future applications for this system could be huge because of the high energy densities and rapid refilling times.
It would be appealing to passenger car vehicles, long haul trucking, and at large utility vehicles.
But excitingly, it may also increase the feasibility of longer distance electrical powered flight.
As you’re still watching, please subscribe to the channel as I think you’ll like some of the other videos I make, like this one on toroidal turbines, which are being used in different applications to improve energy efficiency.
Spiny Norman said:
“Genius Liquid Battery Will End Lithium Cells Forever”Maybe …. but they certainly show potential for various devices/machines.
I’ve been avoiding watching that one, been on my suggestions list for a few days. I generally find anything with the headline that include GENIUS, INSANE, AMAZING etc are generally very unsatisfying to watch and generally light on detail.
Spiny Norman said:
“Genius Liquid Battery Will End Lithium Cells Forever”Maybe …. but they certainly show potential for various devices/machines.
What is the “Solid State” battery near the top right?
Kingy said:
Spiny Norman said:
“Genius Liquid Battery Will End Lithium Cells Forever”Maybe …. but they certainly show potential for various devices/machines.
What is the “Solid State” battery near the top right?
https://www.drive.com.au/caradvice/what-is-a-solid-state-battery/
Can cows fly?
I mean, haven’t all wanted to know that?
The Swedish Bomb – The Bomb in Stockholm’s Basement (secretly the 4th largest nuclear armed nation)
Spiny Norman said:
The Swedish Bomb – The Bomb in Stockholm’s Basement (secretly the 4th largest nuclear armed nation)
Was it a “special delivery beumb?”
The Bantar Gebang landfill outside of Jakarta stretches across 200 football fields.
Far-Kurnel !!
Messed Up Gameshow Makes DYING Contestants Compete for Organ Transplant
https://www.youtube.com/watch?v=h-yXsHlytok
A Solid 20 Minutes of Useless Science Facts.
Spiny Norman said:
A Solid 20 Minutes of Useless Science Facts.
it is finally time for 20 minutes of useless science facts hey Tom how’s it going Austin I’m okay you you’re doing another useless facts video aren’t you that is exactly what I’m doing yeah I’m sorry but hey now you’re here and seeing as you are like the inspiration for this entire useless facts thing how about you do the first fact the periodic table of elements contains 104 lower case letters there are more possible chess game variations than there are atoms in the observable universe 10 to the power of 120 instead of 10 to the power of 80 to be exact the majority of the bones in your body are in your hands and feet unless you are currently pregnant in which case there is a chance that the majority of the bones in your body are in fact in your uterus the internet weighs about the same as tennis ball it’s the collective weight of the electrons that are involved in the working of the entire internet today if you were to drop a peanut m m from two inches that would release more energy than the energy contained in all of the photons that the James Webb Space Telescope is going to collect during its entire 10-year lifespan and it’s already giving us these insane images in just the first few months photons that are produced in the core of the Sun take hundreds of thousands of years to reach the surface of the Sun and then Escape out into space and then it just takes them eight minutes flying through the vacuum of space to arrive here to Earth kind of crazy country with the most tornadoes per square mile is not the United States it’s actually the United Kingdom we can detect some fake oil paintings because of nukes Africa’s some Isotopes found in oil now did not exist in nature before nuclear bomb explosions so paintings containing them must have been painted after the age of nukes began grasshoppers have ears on their stomachs humans produce enough saliva throughout their lives to fill two swimming pools everything around us is designed from the kitchen sink to the walls of your house to your phone or even the chair you’re sitting on they’re designed to function and serve a purpose but they’re also designed to not break we start by knowing how much strength something needs to function and then design it to be that strong for example let’s take a chair that’s designed to hold 100 pounds well what happens when someone who’s a lot heavier than that sits on it it breaks the chair breaks that’s what happens but you see chair designers are smart and they know that fat people love chairs so they specifically engineer them to be stronger than the maximum amount of weight their chair should ever be expected to carry this is what’s called the factor of safety if a beam is designed to carry two times the force it’s ever expected to hold then it has a safety factor of two it’s twice as strong as it needs to be for safety buildings are designed to be overly strong in case they’re hit by an earthquake or a hurricane or something like that with a factor of safety around four or five elevators on the other hand usually have a factor of safety of around 10 meaning if it’s designed to carry 10 people it’ll actually lift around a hundred it’s usually better to be safe than sorry when people’s lives are on the line so imagine an airplane what do you think the factor of safety is for something that’s designed to carry people through the sky 1.2 that means an airplane is designed to only be strong enough to handle 120 percent the maximum load it’s expected to ever take that’s right because the downside to more strength is more weight and if an airplane had the same factor safety as an elevator it’d be too heavy to ever get off the ground don’t worry though airplanes undergo years of design and testing and more testing to make sure that even though they get the weight low enough it’s still strong enough to you know not break in the middle of the flight just think about that the next time you’re on an airplane look out that window and just look at those wings and realize that all it takes is a bit of a record-breaking gust of wind and R.I.P a bit of an oversimplification you really shouldn’t worry about being on an airplane I just thought it was kind of fascinating that something as dangerous as an airplane is just barely fairly strong enough to not break in the middle of the flight more you know in the Philippines there’s an island within a lake within an island within a lake within an island type manistan has a crater that’s been on fire since 1971. it’s a collapsed natural gas field Mars is the only planet in existence to be entirely inhabited by robots as far as we know just six pieces of standard eight studded Lego bricks can be combined in nearly a billion ways or 915 million 103 765 ways to be exact in the Latin quarter of central Paris there’s a radioactive doorknob the connected to a door that leads to the lab of the late French scientist and Nobel Prize winner Marie Curie her work with radium and polonium introduced so much radioactive material into her belongings and her body that 90 years later the material has not fully decayed and for the protection of others they’ve lined her coffin with nearly an inch of lead there are fossilized ripples from the tsunami caused by the asteroid that killed the dinosaurs over 100 of our genes are borrowed from Plants fungi and other organisms Marina guanas sneeze a lot they do it to get rid of salt from the glands near their noses a cat called Chester co-authored a physics paper with the pen name FDC Willard in 1975. the North Pole is a South Pole it’s true magnets have a North Pole and a South Pole as you know and the Earth is a magnet so the North Pole of the Earth’s magnet must be at the North Pole but it’s not the South Pole of the Earth’s magnet is at the North Pole and it’s not a mistake Magnetic North Poles get their name from the fact that they Point towards the north but North Poles are attracted to South Poles so there must be a South Pole at the North Pole peanuts aren’t nuts they’re part of the Lagoon family which includes things like beans and peas so pea nut right now there are around eight thousand tons of space junk around Earth did you know that when you hum you’re actually exhaling through your nose this means that if you pinch your nose shut you cannot hum try it isn’t that wild Jupiter is more than twice the size of all other planets in our solar system combined you probably know that sleeping through the winter is called hibernation but there’s also an equivalent for sleeping through the summer called estivation and it’s done by things like snails tortoises salamanders and crocodiles as well as the maligasy fat tail dwarf lemur and the East African hedgehog and I don’t think I’m ever going to be able to look at a maligasy fat dwarf-tailed lemur the same ever again did you know that in 1950 they used live bears like live bears as test dummies for Mach 2 ejection seats I don’t know why you’d pick bears like surely they’re gonna be angry when you take them out I think it’s because of the weight like their similar weight to humans so that’s important but yeah 1950s drugged the sh out of some bears and heated them out of a plane that Mach 2 something humans did sun bears have tongues that are up to 25 centimeters long that they use to eat insects like termites ants beetle larvae and Bee larvae kangaroos can’t move their hind legs independently of each other unless they’re swimming they’re also the only known animals to use their tail like a fifth leg it’s called pentapedal Locomotion and the tail provides as much propulsive force of front and hind legs combined on average I’m more dense than a supermassive black hole this seems weird because black holes are the most dense objects in our universe but they can also get very very big and so for the biggest ones if you average out their masses over their volumes given by the radius of their Event Horizon the average density is about the same as water the Western lowland gorilla’s scientific name is gorilla gorilla gorilla is an example of a triple taught in it just like bison bison bison links links links and giraffe giraffe giraffe the cables that carry your internet across the ocean that like lie across the ocean floor they’re only about the size of your finger let me show you so this is what’s just in the shallows this is what’s across the ocean floor thousands and thousands of miles of this and this is what actually carries the information wild despite their name killer whales are technically Dolphins but then dolphins are technically whales so science is really confusing sometimes crocodiles and alligators are more closely related to birds than they are to lizards another good reminder that we can’t trust our own eyes owls don’t have eyeballs that can move around in their sockets like we do that’s why they evolved to have necks that can spin around 270 degrees almost silently in 2018 researchers at Oxford University were working on something called the malaria Atlas project they developed a methodology to try and figure out how long it takes to cross any two points on the planet based on things like Transportation type terrain geography that kind of thing and they were doing it to better understand areas of geographic isolation essentially how long it takes to get certain places so when they apply this methodology to the United States they figured out the literal middle of nowhere and that is Glasgow Montana which is more than four and a half hours away from any Metro area with more than 75 000 people and how did I come to learn this well my car broke down in Glasgow Montana and this is all I got about 200 million years from now Asia and America will collide to form a supercontinent around the North Pole oh and there’s already a name for it amazia the caterpillar of the rubber lugan’s moth wears its old heads that have been molted like hats and its nickname is the Mad Hatter pillar the smallest grooves detectable by a human fingerprint are 50 nanometers in depth the moon sometimes orbits through the Earth’s atmosphere now where the atmosphere stops and space begins is a question that has more than one answer but one answer is the top of the exosphere which is the height above the Earth’s surface at which Earth’s gravity exerts less of a force on hydrogen molecules than the solar wind so what that means is behind the Earth in the shadow from the Sun the top of the exosphere extends really far as far as 600 000 kilometers away which forms this wispy tail to the atmosphere called the geo-corona and that’s far enough that sometimes the moon orbits straight through it through the Earth’s atmosphere the Great Wall of China cannot be seen by the naked eye from space but the 64 Thousand Acre greenhouses of Almeria in Spain can be ninety percent of modern apples can be traced back to just two trees male giraffes taste the Pea of females to determine if they’re ready to mate pain we don’t fully understand it the placebo effect paracetamol these are things we use every day but remain far from fully explained but my favorite has got to be general anesthetic we don’t know how it works there are theories one of the leading one revolves around the fact that general anesthetic agents have been observed to exhibit Quantum interactions with entangled photons meaning that doctors were manipulating Quantum forces almost 200 years ago when general anesthetic was first discovered suck on that physicists deep sea dragon fish eat bioluminescent fish so they have a black coating on their stomach to stop other preys seeing the flickering light of their prey being digested you’ve probably heard that there are more stars in the universe than there are grains of sand on the earth which is crazy but what I find more amazing is that there are more atoms in a single grain of sand than there are grains of sand on earth squid brains are shaped like donuts and their digestive tract goes through it so if they eat something that’s too large they literally get brain damage and your stomach enzymes digest you when you die the moon orbits the earth and the Earth orbits the Sun but the sun actually orbits the center of the Milky Way galaxy every 230 million years so that means that when the dinosaurs were around they were on the other side of the galaxy compared to where we are now messages from our brains can travel down our nerves at up to 268 miles per hour humans are bioluminescent and actually glow in the dark but the light that we emit is one thousand times weaker than our eyes are able to pick up there’s a bonsai tree in Italy that’s over 1 000 years old your eardrums move with your eyes so if you look left your eardrums angle to the left so most people know that dogs get rid of excess Heat by panting but they also Act actually sweat a little bit through their paws and when that moisture interacts with the microbial communities that live on their paws and in the crevices in between their Cod pads those microbes are going to consume that moisture and the products they produce as a result of that is what makes dog paws smell bless you like corn chips it’s a really similar process to how humans produce Theo bless you some turtles can breathe through their butts the names Arctic and Antarctica effectively means bears and no bears but even though there are polar bears in the Arctic and none in Antarctica it was just a total coincidence and the names come from Celestial Constellations by mass Pluto consists of 30 to 50 ice in 50 to 70 rock loads of oranges around the world aren’t actually orange they’re green because they’re filled with chlorophyll the same stuff that leaves are filled with when you eat pineapples they eat you right back they contain an enzyme which breaks down meat proteins which is why your tongue sometimes stings a little after eating pineapple female mayflies are born mate lay eggs and die within just five minutes the largest recorded temperature change in 24 hours happened in Montana when it went from minus 47 degrees Celsius to 10 degrees Celsius Barnacles have the greatest penis to weight ratio in all the animal kingdom they’re a huge uh eggplant just pops out of their shells and seeks out females the spell of a mouse is longer than the sperm of an elephant but fruit flies have the longest sperm known to science at six centimeters which is 20 times the size of their body bees are far from home sometimes use pumpkin flowers that close up at night as sleeping bags beer bubbles create a gravity-defined loop where bubbles head up to the center where frictional drag from the glass is less and down on the outside as the top gets crowded there is around 20 million tons of gold dispersed within the oceans that is enough for each person on Earth to have over four kilograms of it however it’s so deluded that if you tried to get all of it you would probably spend significantly more trying to get it than you would actually get from it Texas is three times bigger than the entirety of the UK this isn’t a Cappy also known as the zebra giraffe when a star in the Orion constellation called Beetlejuice explodes sometime in the next 100 000 years it will be as bright as the half moon for over three months and it will be visible during the daytime for more than a year about 14 of people on Earth don’t have a muscle called the palmaris longus if you want to check for yourself just bring your pinky inner thumb together and flick your wrist forward and its tendon will pop up right there you can’t taste food without saliva the average 20 year old has around 10 000 miles of nerve fibers in their brain the average human though has around 10 times more nerve Connections in their brain than there are stars in our galaxy there is an extremely rare type of cloud called a noctilucent cloud you can only see them in the summer months during astronomical Twilight now normal clouds top out at about 12 and a half kilometers or 41 000 feet noctilson clouds however find themselves in the mesosphere and they are at altitudes of around 80 kilometers or 260 000 feet a flea can accelerate 20 times faster than the space shuttle when they jump they reach 8 centimeters in a millisecond so they experience around 100 G’s in the process fighter pilots pull up to around 9 G’s in extreme Maneuvers just to put that into perspective one square sending me a column of atmosphere from the Earth’s surface to the exosphere would weigh one kilogram a human cell contains two meters of DNA and what’s most amazing about that is because your cells are continuously dividing over your whole life time you’ll produce more than two light years of the stuff that’s enough DNA to stretch over halfway to the nearest star there’s only one tree which can live in the ocean the main Grove tree normally the salty water of the ocean would kill a tree to get around this mangroves have developed salt glands on their leaves and bark so if you were to pick the leaf off of a mangrove tree you might notice that it’s covered in small crystals the praying mantis is the only insect that can turn its head from side to side when we talk about social media algorithms we often talk about them like they’re one algorithm but it turns out that when we’re talking about the YouTube algorithm or the Twitter algorithm or the Instagram algorithm we’re actually talking about several different machine learning models that all work in sync to do different things your stomach is amazing not only can this gastric acid break down your food but it can also dissolve a razor blade the human eye can differentiate around 10 million different colors the earliest date for invention for the bow and arrow that we possibly have is 71 000 years ago in South Africa this is based on small micro lists that were found left in a quiver like formation in a cave the sky is blue but it’s blue for a different reason than you might think it’s blue for the same reason that a guitar string will resonate and start to sing with you if you sing next to it so when light comes from the Sun and it’s the atmosphere the nitrogen molecules they’re just the right size that they resonate with that light and re-emit light the average belly button contains 67 species of bacteria the red planet Mars isn’t even red well it kind of is but only on the surface the red hematite dust which is one of the reasons Mars looks red and it’s very thickest up in the thesis region is maybe around 2 meters and then its thinnest elsewhere can be just a few millimeters thick so underneath that dust the Martian rocks of which this is genuinely one are actually gray in the Atacama Desert in Chile there’s a 3 000 year old densely packed shrub that looks like moss covering rocks but it’s actually a cluster of branches and leaves that is so hard that you can stand on it Pando is a forest of 47 000 Aspen trees all joined together by one root system making it genetically one individual the largest single living thing on Earth which is cool in itself but since Pando occupies an area of about 44 hectares the same area as Vatican City that means that the largest single living organism in the world is the same size as the smallest country in the world in an average lifetime a human will walk the equivalent of five times around the world gram for gram human bone is four times stronger than Concrete in North America there is a parasite that gives frogs additional legs it starts off in a bird’s digestive tract then the parasite infects a snail and then finally it infects a tadpole when that tadpole becomes a frog the frog can grow an unusual number of legs like some frogs have 10 legs the legs may make it easier for birds to catch and eat the frogs and when that happens the life cycle starts over again any given spot on our planet’s surface gets darkened by the moon’s Shadow on average only once about every 400 years there’s a volcano in Guatemala called Santa Maria that has been erupting every hour for the last century there’s a species of fungus that looks like a sponge and its scientific name is sponge a former Square panzai Mount rorama is estimated to be about 2 billion years old making it one of the oldest geological formations on Earth on average you fought enough in one day to fill a party balloon and every minute around four earthquake rates of magnitude 2 or higher happened somewhere around the world so since you started watching this video around 80 of those earthquakes have happened because that makes it 20 minutes of useless science facts I can’t believe you sat through the entire thing that’s crazy man
The two Kashmir Giants posing with the American photographer James Ricalton, 1903.
Spiny Norman said:
The two Kashmir Giants posing with the American photographer James Ricalton, 1903.
How do we know that’s not just a very small man with two average size ones?
Spiny Norman said:
The two Kashmir Giants posing with the American photographer James Ricalton, 1903.
Fats Waller saw this, and wrote ‘Your Feets Too Big’ about that bloke on the right.
Spiny Norman said:
The two Kashmir Giants posing with the American photographer James Ricalton, 1903.
https://en.wikipedia.org/wiki/James_Ricalton
ChrispenEvan said:
Spiny Norman said:
The two Kashmir Giants posing with the American photographer James Ricalton, 1903.
https://en.wikipedia.org/wiki/James_Ricalton
Those giants are on stilts, that’s why they are carrying sticks.
Czechoslovak railroad workers defrosting railroad tracks using a MiG-15 engine during a severe snowstorm in 1970.
Spiny Norman said:
Czechoslovak railroad workers defrosting railroad tracks using a MiG-15 engine during a severe snowstorm in 1970.
innovative, to say the least. I guess they had access to plenty of cheap Russian oil in the day to make fuel.
party_pants said:
Spiny Norman said:
Czechoslovak railroad workers defrosting railroad tracks using a MiG-15 engine during a severe snowstorm in 1970.
innovative, to say the least. I guess they had access to plenty of cheap Russian oil in the day to make fuel.
Jet engines aren’t very fussy with the fuel they burn. Pretty much any flammable liquid will do.
Thought you might be interested in this news article, spiny.
https://www.abc.net.au/news/2023-04-10/queensland-road-rules-licence-retesting-safety-measures/102204738
Michael V said:
Thought you might be interested in this news article, spiny.https://www.abc.net.au/news/2023-04-10/queensland-road-rules-licence-retesting-safety-measures/102204738
It’s very good to see. I’ve been pushing for that for over twenty years I think.
Ta for the link.
Spiny Norman said:
Michael V said:
Thought you might be interested in this news article, spiny.https://www.abc.net.au/news/2023-04-10/queensland-road-rules-licence-retesting-safety-measures/102204738
It’s very good to see. I’ve been pushing for that for over twenty years I think.
Ta for the link.
No wukkas.
They are not considering re-testing actual driving skills though, it seems. Pity. That should be on the table, too.
Michael V said:
Spiny Norman said:
Michael V said:
Thought you might be interested in this news article, spiny.https://www.abc.net.au/news/2023-04-10/queensland-road-rules-licence-retesting-safety-measures/102204738
It’s very good to see. I’ve been pushing for that for over twenty years I think.
Ta for the link.
No wukkas.
They are not considering re-testing actual driving skills though, it seems. Pity. That should be on the table, too.
Yep. An aviation-style programme would be a very good thing.
Michael V said:
Spiny Norman said:
Michael V said:
Thought you might be interested in this news article, spiny.https://www.abc.net.au/news/2023-04-10/queensland-road-rules-licence-retesting-safety-measures/102204738
It’s very good to see. I’ve been pushing for that for over twenty years I think.
Ta for the link.
No wukkas.
They are not considering re-testing actual driving skills though, it seems. Pity. That should be on the table, too.
I agree with for cause testing but mandatory retesting is a crap idea…
Michael V said:
Spiny Norman said:
Michael V said:
Thought you might be interested in this news article, spiny.https://www.abc.net.au/news/2023-04-10/queensland-road-rules-licence-retesting-safety-measures/102204738
It’s very good to see. I’ve been pushing for that for over twenty years I think.
Ta for the link.
No wukkas.
They are not considering re-testing actual driving skills though, it seems. Pity. That should be on the table, too.
Do you have 10 year licences in Qld?
furious said:
Michael V said:
Spiny Norman said:It’s very good to see. I’ve been pushing for that for over twenty years I think.
Ta for the link.
No wukkas.
They are not considering re-testing actual driving skills though, it seems. Pity. That should be on the table, too.
I agree with for cause testing but mandatory retesting is a crap idea…
So you’d be happy getting into an airliner if the flight crews weren’t skill tested frequently?
Driving a car on the road is, in some ways, more difficult than flying an airliner.
buffy said:
Michael V said:
Spiny Norman said:It’s very good to see. I’ve been pushing for that for over twenty years I think.
Ta for the link.
No wukkas.
They are not considering re-testing actual driving skills though, it seems. Pity. That should be on the table, too.
Do you have 10 year licences in Qld?
It’s either five or ten, I can’t remember.
Spiny Norman said:
furious said:
Michael V said:No wukkas.
They are not considering re-testing actual driving skills though, it seems. Pity. That should be on the table, too.
I agree with for cause testing but mandatory retesting is a crap idea…
So you’d be happy getting into an airliner if the flight crews weren’t skill tested frequently?
Driving a car on the road is, in some ways, more difficult than flying an airliner.
You want to do that as a job, you gotta do what you gotta do…
furious said:
Spiny Norman said:
furious said:I agree with for cause testing but mandatory retesting is a crap idea…
So you’d be happy getting into an airliner if the flight crews weren’t skill tested frequently?
Driving a car on the road is, in some ways, more difficult than flying an airliner.
You want to do that as a job, you gotta do what you gotta do…
That’s not addressing the question.
furious said:
Michael V said:
Spiny Norman said:It’s very good to see. I’ve been pushing for that for over twenty years I think.
Ta for the link.
No wukkas.
They are not considering re-testing actual driving skills though, it seems. Pity. That should be on the table, too.
I agree with for cause testing but mandatory retesting is a crap idea…
Why?
buffy said:
Michael V said:
Spiny Norman said:It’s very good to see. I’ve been pushing for that for over twenty years I think.
Ta for the link.
No wukkas.
They are not considering re-testing actual driving skills though, it seems. Pity. That should be on the table, too.
Do you have 10 year licences in Qld?
Five years maximum.
furious said:
Michael V said:
Spiny Norman said:It’s very good to see. I’ve been pushing for that for over twenty years I think.
Ta for the link.
No wukkas.
They are not considering re-testing actual driving skills though, it seems. Pity. That should be on the table, too.
I agree with for cause testing but mandatory retesting is a crap idea…
I disagree with you about retesting; laws change, and very few people bother to keep up with the changes. A simple example: when roundabouts were first introduced, the requirement was to “give way to any vehicle already in the roundabout and on your right.” The law (in Victoria, at least) now says “give way to any vehicle already in the roundabout.”, but unless people have reread the rules, they won’t know that.
Retesting would force people to keep up with new/changed rules/laws.
What is an F1 Driver’s Workload Like During a Lap?
btm said:
furious said:
Michael V said:No wukkas.
They are not considering re-testing actual driving skills though, it seems. Pity. That should be on the table, too.
I agree with for cause testing but mandatory retesting is a crap idea…
I disagree with you about retesting; laws change, and very few people bother to keep up with the changes. A simple example: when roundabouts were first introduced, the requirement was to “give way to any vehicle already in the roundabout and on your right.” The law (in Victoria, at least) now says “give way to any vehicle already in the roundabout.”, but unless people have reread the rules, they won’t know that.
Retesting would force people to keep up with new/changed rules/laws.
I doubt there we ever a give way to the right in a roundabout. It alwats was give way to those in the roundablout and turn left at any time is basically what that means.
roughbarked said:
btm said:
furious said:I agree with for cause testing but mandatory retesting is a crap idea…
I disagree with you about retesting; laws change, and very few people bother to keep up with the changes. A simple example: when roundabouts were first introduced, the requirement was to “give way to any vehicle already in the roundabout and on your right.” The law (in Victoria, at least) now says “give way to any vehicle already in the roundabout.”, but unless people have reread the rules, they won’t know that.
Retesting would force people to keep up with new/changed rules/laws.
I doubt there we ever a give way to the right in a roundabout. It alwats was give way to those in the roundablout and turn left at any time is basically what that means.
In fact, I believe that any give way sign supercedes the give way to the right rule.
The crew apparently survived. Not sure if they ditched or somehow made it back to the carrier. Most impressive they could keep it in the air for any length of time though – You can see what must be something like full-right aileron and a heap of right rudder to try and keep it level.
Belongs here I guess..
Jet Man | The Invention Of The Jet Engine. Frank Whittle, The Genius Of The Jet Era | HD Documentary
Spiny Norman said:
The crew apparently survived. Not sure if they ditched or somehow made it back to the carrier. Most impressive they could keep it in the air for any length of time though – You can see what must be something like full-right aileron and a heap of right rudder to try and keep it level.
It came out of the Grumman ironworks.
Spiny Norman said:
The crew apparently survived. Not sure if they ditched or somehow made it back to the carrier. Most impressive they could keep it in the air for any length of time though – You can see what must be something like full-right aileron and a heap of right rudder to try and keep it level.
A damaged U.S. Navy Grumman TBM-3 Avenger of Torpedo Squadron 82 (VT-82) “Devil’s Diplomats” in flight after the plane above it in her formation was shot down by anti-aircraft fire near Chichi Jima and fell on this Avenger, breaking off the left wingtip and cracking the fuselage just ahead of the tail, circa 18 February – 4 March 1945. The damaged plane was flown by its pilot about 160 km back to its task group but had to crash land in the water. All crew members were rescued. VT-82 was assigned to Carrier Air Group 82 (CVG-82) aboard the aircraft carrier USS Bennington (CV-20). Note Bennington’s geometric identification symbol on the Avenger.
ChrispenEvan said:
Spiny Norman said:
The crew apparently survived. Not sure if they ditched or somehow made it back to the carrier. Most impressive they could keep it in the air for any length of time though – You can see what must be something like full-right aileron and a heap of right rudder to try and keep it level.
A damaged U.S. Navy Grumman TBM-3 Avenger of Torpedo Squadron 82 (VT-82) “Devil’s Diplomats” in flight after the plane above it in her formation was shot down by anti-aircraft fire near Chichi Jima and fell on this Avenger, breaking off the left wingtip and cracking the fuselage just ahead of the tail, circa 18 February – 4 March 1945. The damaged plane was flown by its pilot about 160 km back to its task group but had to crash land in the water. All crew members were rescued. VT-82 was assigned to Carrier Air Group 82 (CVG-82) aboard the aircraft carrier USS Bennington (CV-20). Note Bennington’s geometric identification symbol on the Avenger.
Ta for finding that.
Ian said:
Belongs here I guess..Jet Man | The Invention Of The Jet Engine. Frank Whittle, The Genius Of The Jet Era | HD Documentary
I do very much appreciate what Whittle did, but he was not the only person working on jet engines. Von Ohain, etc, in Germany were ahead of him pretty much the entire time. First jet engine start & jet aeroplane flights were both German. The basic layout of modern jet engines is also far more like the early German designs rather than the British ones. Whittle was certainly the one that worked out that the fan blades could run quite a lot of twist in them though and that has continued ever since.
Spiny Norman said:
Ian said:
Belongs here I guess..Jet Man | The Invention Of The Jet Engine. Frank Whittle, The Genius Of The Jet Era | HD Documentary
I do very much appreciate what Whittle did, but he was not the only person working on jet engines. Von Ohain, etc, in Germany were ahead of him pretty much the entire time. First jet engine start & jet aeroplane flights were both German. The basic layout of modern jet engines is also far more like the early German designs rather than the British ones. Whittle was certainly the one that worked out that the fan blades could run quite a lot of twist in them though and that has continued ever since.
Yes, the doco talks about Von Ohain and the German efforts. Whittle appears to have been constantly frustrated and limited by War ministry and then civilian lack of imagination, bloody-mindedness and back stabbing. The Pommy jet fighter could have in service years earlier.
https://blog.doublehelix.csiro.au/understanding-the-pee-catapult/
No info on this photo sorry.
Spiny Norman said:
No info on this photo sorry.
it’s a guy riding through a semi dry river bed with a hat and pipe as protective gear
Spiny Norman said:
No info on this photo sorry.
It’s an A.J.Stevens motorcycle but I don’t recognise the rider.
Spiny Norman said:
No info on this photo sorry.
It is a trials rider is what I can glean from a search.
Spiny Norman said:
No info on this photo sorry.
It’s a mid-1950s AJS Competition Trials bike being used as intended – in a Competition Trial, in the 1950s, before helmets were mandatory.
Hillson Bi-Mono Hurricane I proof of concept. Jettisonable upper wing to enable greater load or take off from a shorter field.
Spiny Norman said:
Hillson Bi-Mono Hurricane I proof of concept. Jettisonable upper wing to enable greater load or take off from a shorter field.
That’s an oddity.
Bubblecar said:
Spiny Norman said:
Hillson Bi-Mono Hurricane I proof of concept. Jettisonable upper wing to enable greater load or take off from a shorter field.
That’s an oddity.
Bubblecar said:
Spiny Norman said:
Hillson Bi-Mono Hurricane I proof of concept. Jettisonable upper wing to enable greater load or take off from a shorter field.
That’s an oddity.
Something I didn’t know about untiil now.
https://www.youtube.com/watch?v=qQ15ZkqTzqc
Tools, Glorious Tools! #7 – Four Shop Made Everyday Hand Tools
Clickspring.
Explaining concrete while getting buried in it.
Strange New Explanation for Why Quantum World Collapses Into Reality
Spiny Norman said:
Strange New Explanation for Why Quantum World Collapses Into Reality
Skimmed through the top half of the transcript, and I think I’ll waste that 10 minutes on something else.
Why do so many people still talk as though the cat in the box really was both dead and alive until observed by a human, when the whole point of the thing was to illustrate how ridiculous it is to suppose that these events depend on human observation?
The Rev Dodgson said:
Spiny Norman said:
Strange New Explanation for Why Quantum World Collapses Into RealitySkimmed through the top half of the transcript, and I think I’ll waste that 10 minutes on something else.
Why do so many people still talk as though the cat in the box really was both dead and alive until observed by a human, when the whole point of the thing was to illustrate how ridiculous it is to suppose that these events depend on human observation?
It’s got more to do with information than actual human observation AFAICT. The cat literally is both alive and dead until new information is confirmed by observation either human or mechanical like a sensor.
Witty Rejoinder said:
The Rev Dodgson said:
Spiny Norman said:
Strange New Explanation for Why Quantum World Collapses Into RealitySkimmed through the top half of the transcript, and I think I’ll waste that 10 minutes on something else.
Why do so many people still talk as though the cat in the box really was both dead and alive until observed by a human, when the whole point of the thing was to illustrate how ridiculous it is to suppose that these events depend on human observation?
It’s got more to do with information than actual human observation AFAICT. The cat literally is both alive and dead until new information is confirmed by observation either human or mechanical like a sensor.
The poison is or isn’t triggered by a radioactive emission, and that’s all the observation required to make the event real.
The Rev Dodgson said:
Spiny Norman said:
Strange New Explanation for Why Quantum World Collapses Into RealitySkimmed through the top half of the transcript, and I think I’ll waste that 10 minutes on something else.
Why do so many people still talk as though the cat in the box really was both dead and alive until observed by a human, when the whole point of the thing was to illustrate how ridiculous it is to suppose that these events depend on human observation?
I thought that it was something to do with Heisenbergs Uncertainty Principle.
The Rev Dodgson said:
Witty Rejoinder said:
The Rev Dodgson said:Skimmed through the top half of the transcript, and I think I’ll waste that 10 minutes on something else.
Why do so many people still talk as though the cat in the box really was both dead and alive until observed by a human, when the whole point of the thing was to illustrate how ridiculous it is to suppose that these events depend on human observation?
It’s got more to do with information than actual human observation AFAICT. The cat literally is both alive and dead until new information is confirmed by observation either human or mechanical like a sensor.
The poison is or isn’t triggered by a radioactive emission, and that’s all the observation required to make the event real.
I’m no expert but I don’t think that is correct. Without opening the box there is no way of knowing whether the decay has occurred and if we did have a sensor in the box we wouldn’t need to bother with indeterminate pussy cats. The important bit is the information that can be gleaned from any system AFAICT.
Witty Rejoinder said:
The Rev Dodgson said:
Witty Rejoinder said:It’s got more to do with information than actual human observation AFAICT. The cat literally is both alive and dead until new information is confirmed by observation either human or mechanical like a sensor.
The poison is or isn’t triggered by a radioactive emission, and that’s all the observation required to make the event real.
I’m no expert but I don’t think that is correct. Without opening the box there is no way of knowing whether the decay has occurred and if we did have a sensor in the box we wouldn’t need to bother with indeterminate pussy cats. The important bit is the information that can be gleaned from any system AFAICT.
Witty Rejoinder said:
The Rev Dodgson said:
Witty Rejoinder said:It’s got more to do with information than actual human observation AFAICT. The cat literally is both alive and dead until new information is confirmed by observation either human or mechanical like a sensor.
The poison is or isn’t triggered by a radioactive emission, and that’s all the observation required to make the event real.
I’m no expert but I don’t think that is correct. Without opening the box there is no way of knowing whether the decay has occurred and if we did have a sensor in the box we wouldn’t need to bother with indeterminate pussy cats. The important bit is the information that can be gleaned from any system AFAICT.
Even if we ignore the detector that releases the poison gas, the information system known as a cat is perfectly capable of detecting whether it is breathing air (and continuing to operate) or breathing poison gas (and shutting down cat operations).
The Rev Dodgson said:
Witty Rejoinder said:
The Rev Dodgson said:The poison is or isn’t triggered by a radioactive emission, and that’s all the observation required to make the event real.
I’m no expert but I don’t think that is correct. Without opening the box there is no way of knowing whether the decay has occurred and if we did have a sensor in the box we wouldn’t need to bother with indeterminate pussy cats. The important bit is the information that can be gleaned from any system AFAICT.
Even if we ignore the detector that releases the poison gas, the information system known as a cat is perfectly capable of detecting whether it is breathing air (and continuing to operate) or breathing poison gas (and shutting down cat operations).
the cat isn’t the observer though.
JudgeMental said:
Witty Rejoinder said:
The Rev Dodgson said:The poison is or isn’t triggered by a radioactive emission, and that’s all the observation required to make the event real.
I’m no expert but I don’t think that is correct. Without opening the box there is no way of knowing whether the decay has occurred and if we did have a sensor in the box we wouldn’t need to bother with indeterminate pussy cats. The important bit is the information that can be gleaned from any system AFAICT.
From the link:
“The cat ends up both dead and alive at the same time. Because the existence of a cat that is both dead and alive at the same time is absurd and does not happen in the real world, this thought experiment shows that wavefunction collapses are not just driven by conscious observers.”
The Rev Dodgson said:
JudgeMental said:
Witty Rejoinder said:I’m no expert but I don’t think that is correct. Without opening the box there is no way of knowing whether the decay has occurred and if we did have a sensor in the box we wouldn’t need to bother with indeterminate pussy cats. The important bit is the information that can be gleaned from any system AFAICT.
From the link:
“The cat ends up both dead and alive at the same time. Because the existence of a cat that is both dead and alive at the same time is absurd and does not happen in the real world, this thought experiment shows that wavefunction collapses are not just driven by conscious observers.”
yes. until observed.
JudgeMental said:
The Rev Dodgson said:
Witty Rejoinder said:I’m no expert but I don’t think that is correct. Without opening the box there is no way of knowing whether the decay has occurred and if we did have a sensor in the box we wouldn’t need to bother with indeterminate pussy cats. The important bit is the information that can be gleaned from any system AFAICT.
Even if we ignore the detector that releases the poison gas, the information system known as a cat is perfectly capable of detecting whether it is breathing air (and continuing to operate) or breathing poison gas (and shutting down cat operations).
the cat isn’t the observer though.
The cat most certainly is an observer.
It’s not a human observer, so no human knows the outcome until the box is opened, but that is irelevent.
The Rev Dodgson said:
JudgeMental said:
The Rev Dodgson said:Even if we ignore the detector that releases the poison gas, the information system known as a cat is perfectly capable of detecting whether it is breathing air (and continuing to operate) or breathing poison gas (and shutting down cat operations).
the cat isn’t the observer though.
The cat most certainly is an observer.
It’s not a human observer, so no human knows the outcome until the box is opened, but that is irelevent.
no it isn’t, it is the quantum state.
JudgeMental said:
The Rev Dodgson said:
JudgeMental said:From the link:
“The cat ends up both dead and alive at the same time. Because the existence of a cat that is both dead and alive at the same time is absurd and does not happen in the real world, this thought experiment shows that wavefunction collapses are not just driven by conscious observers.”yes. until observed.
I don’t know what you mean by that.
JudgeMental said:
The Rev Dodgson said:
JudgeMental said:the cat isn’t the observer though.
The cat most certainly is an observer.
It’s not a human observer, so no human knows the outcome until the box is opened, but that is irelevent.
no it isn’t, it is the quantum state.
Why do you say that?
A wave function is collapsed when the Geiger counter detects the emission, and a load more when it releases the poisonous gas, and yet more still when the cat interacts with the poisonous gas.
The Rev Dodgson said:
JudgeMental said:
The Rev Dodgson said:The cat most certainly is an observer.
It’s not a human observer, so no human knows the outcome until the box is opened, but that is irelevent.
no it isn’t, it is the quantum state.
Why do you say that?
A wave function is collapsed when the Geiger counter detects the emission, and a load more when it releases the poisonous gas, and yet more still when the cat interacts with the poisonous gas.
I say it because it is. we know how it works but what you have detailed is happening inside the box and hidden from outside observers. So until we open the box, take the money, none of this is known. that is the whole point of the experiment.
The Rev Dodgson said:
JudgeMental said:
The Rev Dodgson said:The cat most certainly is an observer.
It’s not a human observer, so no human knows the outcome until the box is opened, but that is irelevent.
no it isn’t, it is the quantum state.
Why do you say that?
A wave function is collapsed when the Geiger counter detects the emission, and a load more when it releases the poisonous gas, and yet more still when the cat interacts with the poisonous gas.
OTOH, TATE says:
It is unclear which interpretation is correct; the underlying issue raised by Schrödinger’s cat remains an unsolved problem in physics.Which if true implies that at least some physicists don’t agree with me (but some do).
JudgeMental said:
The Rev Dodgson said:
JudgeMental said:no it isn’t, it is the quantum state.
Why do you say that?
A wave function is collapsed when the Geiger counter detects the emission, and a load more when it releases the poisonous gas, and yet more still when the cat interacts with the poisonous gas.
I say it because it is. we know how it works but what you have detailed is happening inside the box and hidden from outside observers. So until we open the box, take the money, none of this is known. that is the whole point of the experiment.
If that is the point of the experiment, it is totally trivial.
But it certainly wasn’t Schroedinger’s intent when he thought of it.
The Rev Dodgson said:
The Rev Dodgson said:
JudgeMental said:no it isn’t, it is the quantum state.
Why do you say that?
A wave function is collapsed when the Geiger counter detects the emission, and a load more when it releases the poisonous gas, and yet more still when the cat interacts with the poisonous gas.
OTOH, TATE says:
It is unclear which interpretation is correct; the underlying issue raised by Schrödinger’s cat remains an unsolved problem in physics.Which if true implies that at least some physicists don’t agree with me (but some do).
the full quotes tells a more honest answer
Fundamentally, the Schrödinger’s cat experiment asks how long superpositions last and when (or whether) they collapse. Interpretations for resolving this question include that the cat is dead or alive when the box is opened (Copenhagen); that a conscious mind must observe the box (Von Neumann–Wigner); that upon observation the universe branches into a universe where the cat is alive, and one where it is dead (many-worlds); that every object (such as the cat, and the box itself) is an observer, but superposition is relative depending on the observer (relational); that superposition never truly exists due to time-travelling waves (transactional); that merely observing the box either slows or accelerates the cat’s death (quantum Zeno effect); among other theories which assert that the cat is dead or alive long before the box is opened. It is unclear which interpretation is correct; the underlying issue raised by Schrödinger’s cat remains an unsolved problem in physics.
JudgeMental said:
The Rev Dodgson said:
The Rev Dodgson said:Why do you say that?
A wave function is collapsed when the Geiger counter detects the emission, and a load more when it releases the poisonous gas, and yet more still when the cat interacts with the poisonous gas.
OTOH, TATE says:
It is unclear which interpretation is correct; the underlying issue raised by Schrödinger’s cat remains an unsolved problem in physics.Which if true implies that at least some physicists don’t agree with me (but some do).
the full quotes tells a more honest answer
Fundamentally, the Schrödinger’s cat experiment asks how long superpositions last and when (or whether) they collapse. Interpretations for resolving this question include that the cat is dead or alive when the box is opened (Copenhagen); that a conscious mind must observe the box (Von Neumann–Wigner); that upon observation the universe branches into a universe where the cat is alive, and one where it is dead (many-worlds); that every object (such as the cat, and the box itself) is an observer, but superposition is relative depending on the observer (relational); that superposition never truly exists due to time-travelling waves (transactional); that merely observing the box either slows or accelerates the cat’s death (quantum Zeno effect); among other theories which assert that the cat is dead or alive long before the box is opened. It is unclear which interpretation is correct; the underlying issue raised by Schrödinger’s cat remains an unsolved problem in physics.
It is more detailed.
It absolutely is not more “honest”.
Now gone.
anyway enough of this trivial explaining.
It’s been snowing in Saudi Arabia.
An unusual name for a suburb in Reunion Island.
Spiny Norman said:
An unusual name for a suburb in Reunion Island.
LOL
Spiny Norman said:
An unusual name for a suburb in Reunion Island.
Well at least it is female?
roughbarked said:
Spiny Norman said:
An unusual name for a suburb in Reunion Island.
Well at least it is female?
No, it isn’t.
‘Le tampon’ in French is a ‘masculine’ noun, as signified by the definite areticle ‘le’. If it were ‘feminine’, it would be ‘la tampon’.
The translation of ‘le tampon’ is ‘the buffer’ (as in ‘barrier’ or ‘blockade’).
Only ever met one person from Réunion (in French, ‘réunion’ means ‘meeting’).
A young man who knocked at our door, collecting for the Red Cross. I gave him a donation, and then, because there was something about him, i asked ‘pardon, mais vous êtes français, n’est-ce pas?’
He was taken aback for a moment, andthen answered ‘eh bien, oui, je le suis’.
He was from Réunion, and when i explained that (a) my first French teacher had come from the neighbouring island of Mauritius, and (b) i was secretary ofthe local Alliance Francaise (‘vraiment?!’, he said), we had a good old chat, and he went away seeming quite happy.
Spiny Norman said:
An unusual name for a suburb in Reunion Island.
I’ve heard that they’re all up themselves there.
captain_spalding said:
roughbarked said:
Spiny Norman said:
An unusual name for a suburb in Reunion Island.
Well at least it is female?
No, it isn’t.
‘Le tampon’ in French is a ‘masculine’ noun, as signified by the definite areticle ‘le’. If it were ‘feminine’, it would be ‘la tampon’.
The translation of ‘le tampon’ is ‘the buffer’ (as in ‘barrier’ or ‘blockade’).
Yes I realised that later.
roughbarked said:
captain_spalding said:
roughbarked said:Well at least it is female?
No, it isn’t.
‘Le tampon’ in French is a ‘masculine’ noun, as signified by the definite areticle ‘le’. If it were ‘feminine’, it would be ‘la tampon’.
The translation of ‘le tampon’ is ‘the buffer’ (as in ‘barrier’ or ‘blockade’).
Yes I realised that later.
C’est ne pas grave.
Scientists hope to use seas as big sponges to tackle global warming
Spiny Norman said:
Scientists hope to use seas as big sponges to tackle global warming
It makes sense if they are doing the conversion on board ship, that the easiest way to deposit the solids would be to dump it straight back into the ocean. Presumably the rate it is deposited that could be dispersed by the movement of water so as to not clump on top of living things and smother them is the only issue to really worry about.
Spiny Norman said:
Scientists hope to use seas as big sponges to tackle global warming
Morning pilgrims, nothing to report.
Over.
Oh lovely.
New Research Sparks Concerns That Ocean Circulation Will Collapse.
Scientists have long feared that warming could cause a breakdown of ocean circulation in the North Atlantic. But new research finds the real risk lies in Antarctica’s waters, where melting could disrupt currents in the next few decades, with profound impacts on global climate.
https://e360.yale.edu/features/climate-change-ocean-circulation-collapse-antarctica
https://www.youtube.com/watch?v=jcO_ii1X_v4
New Wind Powered Land Speed World Record – 225.58km/h
Volcanic microbe eats CO2 ‘astonishingly quickly’, say scientists.
Discovery of carbon-capturing organism in hot springs could lead to efficient way of absorbing climate-heating gas.
Spiny Norman said:
Oh lovely.New Research Sparks Concerns That Ocean Circulation Will Collapse.
Scientists have long feared that warming could cause a breakdown of ocean circulation in the North Atlantic. But new research finds the real risk lies in Antarctica’s waters, where melting could disrupt currents in the next few decades, with profound impacts on global climate.https://e360.yale.edu/features/climate-change-ocean-circulation-collapse-antarctica
Everything to do with global warming continues to accelerate.
Extracted from the linked article:
>>A new analysis by Australian and American researchers, using new and more detailed modeling of the oceans, predicts that the long-feared turn-off of the circulation will likely occur in the Southern Ocean, as billions of tons of ice melt on the land mass of Antarctica. And rather than being more than a century away, as models predict for the North Atlantic, it could happen within the next three decades.<<
>>The ocean circulation system, often called the global conveyor, follows a regular path through the Earth’s oceans and stirs their waters from top to bottom. It starts with water plunging from the surface and disappearing to the depths, from where it travels the world and does not surface for centuries. By capturing heat and carbon dioxide from the atmosphere, and burying both deep in the ocean, it is currently moderating global warming.<<
Legend has it that when Henry Ford was asked why he got into the car business, he replied that, “if I’d asked the customers what they wanted, they would have said faster horses.”
Some light aircraft have a lightning detector instrument, usually called a Storm Scope. They show the direction of lightning strikes and a rough distance, based on (I think) the power of the lightning bolt.
Spiny Norman said:
Some light aircraft have a lightning detector instrument, usually called a Storm Scope. They show the direction of lightning strikes and a rough distance, based on (I think) the power of the lightning bolt.
My old man’s A36 had one of those.
A couple of Honda F1 heads sectioned.
The Stockholm Telephone Tower with approximately 5,500 telephone lines, 1890.
Spiny Norman said:
The Stockholm Telephone Tower with approximately 5,500 telephone lines, 1890.
PermeateFree said:
Spiny Norman said:
Oh lovely.New Research Sparks Concerns That Ocean Circulation Will Collapse.
Scientists have long feared that warming could cause a breakdown of ocean circulation in the North Atlantic. But new research finds the real risk lies in Antarctica’s waters, where melting could disrupt currents in the next few decades, with profound impacts on global climate.https://e360.yale.edu/features/climate-change-ocean-circulation-collapse-antarctica
Everything to do with global warming continues to accelerate.
Extracted from the linked article:
>>A new analysis by Australian and American researchers, using new and more detailed modeling of the oceans, predicts that the long-feared turn-off of the circulation will likely occur in the Southern Ocean, as billions of tons of ice melt on the land mass of Antarctica. And rather than being more than a century away, as models predict for the North Atlantic, it could happen within the next three decades.<<
>>The ocean circulation system, often called the global conveyor, follows a regular path through the Earth’s oceans and stirs their waters from top to bottom. It starts with water plunging from the surface and disappearing to the depths, from where it travels the world and does not surface for centuries. By capturing heat and carbon dioxide from the atmosphere, and burying both deep in the ocean, it is currently moderating global warming.<<
++++groans in unhappy manner++++
The Soviet Union’s Deadly Abandoned Nuclear Generators.
NEVER Hire a Stupid Hitman | Tales From the Bottle.
You couldn’t make this up!
How NASA built rocket engines before 3D printing.
The Paratechnicon, a modular cargo-carrying pannier that was fitted to the first Handley Page Hastings transport aircraft.
The device was intended to increase the cargo capacity of the Hastings, but it detached itself in flight, causing the tragic loss of both aircraft and crew.
Spiny Norman said:
The Paratechnicon, a modular cargo-carrying pannier that was fitted to the first Handley Page Hastings transport aircraft.
The device was intended to increase the cargo capacity of the Hastings, but it detached itself in flight, causing the tragic loss of both aircraft and crew.
I wonder about the drag, and effect on the aircraft’s performance.
Would it, in the end, be much more economical than using a second plane?
captain_spalding said:
Spiny Norman said:
The Paratechnicon, a modular cargo-carrying pannier that was fitted to the first Handley Page Hastings transport aircraft.
The device was intended to increase the cargo capacity of the Hastings, but it detached itself in flight, causing the tragic loss of both aircraft and crew.
I wonder about the drag, and effect on the aircraft’s performance.
Would it, in the end, be much more economical than using a second plane?
It’d have a performance hit for sure, I’ve seen much the same thing used on some Cessna single-engined planes.
There’s also my modern aircraft, such as the F16 and F15, that have conformal tanks that allow for more fuel.
The later versions of the EE Lightning also had a pregnant bulge under the fuselage for more fuel.
The Lightnings were very thirsty and didn’t have a lot of space for fuel. They are the only aircraft I know of that also used the flaps as fuel tanks!
JudgeMental said:
That’s a great pic. Several of our fire vollies are up there in that shadow, and some guy from some internet forum somewhere.
JudgeMental said:
The flat-earthists will not be impressed.
The Rev Dodgson said:
JudgeMental said:
The flat-earthists will not be impressed.
If you squint, you can just make out dv and the boy.
“Well, I have to say I was sceptical of reports that a lunar spacesuit might have the backpack moved to the legs, to make hatch entry easier.
But YASTREB RVR-1P shown here has exactly that!”
How these impossibly thin cuts are made – EDM machines.
Spiny Norman said:
How these impossibly thin cuts are made – EDM machines.
They are awesome aren’t they.
Spiny Norman said:
How these impossibly thin cuts are made – EDM machines.
The sponsor message when he shows which side of his face was shaved with which razor, the plastic cartridge one still has the plastic cover that prevents the blades from contacting anything.
It isn’t any wonder then why it appears to not be shaving.
Spiny Norman said:
How these impossibly thin cuts are made – EDM machines.
Ta.
An SR-71 Blackbird cockpit.
Spiny Norman said:
An SR-71 Blackbird cockpit.
Looks very random.
Bubblecar said:
Spiny Norman said:
An SR-71 Blackbird cockpit.
Looks very random.
I like the vertical speed gauge.
Spiny Norman said:
An SR-71 Blackbird cockpit.
it hasn’t any rear view mirrors!!!
JudgeMental said:
Spiny Norman said:
An SR-71 Blackbird cockpit.
it hasn’t any rear view mirrors!!!
Bubblecar said:
Spiny Norman said:
An SR-71 Blackbird cockpit.
Looks very random.
It would seem so on first inspection but all the instruments/switches/etc are typically placed were they are needed.
JudgeMental said:
Spiny Norman said:
An SR-71 Blackbird cockpit.
it hasn’t any rear view mirrors!!!
I think they had an extendable one, so the pilot could look back at the big rudders to make sure they were correctly aligned in the neutral position for minimum drag.
https://www.youtube.com/watch?v=sbxQsvVAnZE
Using Explosives to clear a rocky paddock
Demolition Dave
ChrispenEvan said:
https://www.youtube.com/watch?v=sbxQsvVAnZEUsing Explosives to clear a rocky paddock
Demolition Dave
‘splosions.
Let’s take a look back in history today to a top secret mission and massive engineering challenge that took place in 1942:
The transport of 6 submarines and other ships across the continent from the Baltic Sea to the Black Sea.
Let’s have a closer look at:
Why did they transport submarines across the continent?
Which routes did they consider?
How were the transports prepared and organised?
Which infrastructure had to be built and can still be found today?
What happened to the submarines in the Black Sea?
Spiny Norman said:
Let’s take a look back in history today to a top secret mission and massive engineering challenge that took place in 1942:The transport of 6 submarines and other ships across the continent from the Baltic Sea to the Black Sea.
Let’s have a closer look at:
Why did they transport submarines across the continent?
Which routes did they consider?
How were the transports prepared and organised?
Which infrastructure had to be built and can still be found today?
What happened to the submarines in the Black Sea?
Interesting.
“If you think they are tight, tighten them again. Tony Quinn’s message on belt safety.”
I usually do up the belts in the racing car so it’s a little bit painful.
Spiny Norman said:
“If you think they are tight, tighten them again. Tony Quinn’s message on belt safety.”I usually do up the belts in the racing car so it’s a little bit painful.
Did he have a big prang in Townsville? I can’t find any footage of it.
Kingy said:
Spiny Norman said:
“If you think they are tight, tighten them again. Tony Quinn’s message on belt safety.”I usually do up the belts in the racing car so it’s a little bit painful.
Did he have a big prang in Townsville? I can’t find any footage of it.
Never mind, I just watched the clip.
Soviet Space Manoeuvring Unit.
Early on in the crewed Soviet space program, they were looking at how cosmonauts could get around outside of their spacecraft. What they came up with was very different from American solutions.
graphicsnickstevens.substack.com/p/upmk-soviet-space-manoeuvring-unit
Spiny Norman said:
Soviet Space Manoeuvring Unit.Early on in the crewed Soviet space program, they were looking at how cosmonauts could get around outside of their spacecraft. What they came up with was very different from American solutions.
graphicsnickstevens.substack.com/p/upmk-soviet-space-manoeuvring-unit
Very interesting.
Spiny Norman said:
Soviet Space Manoeuvring Unit.Early on in the crewed Soviet space program, they were looking at how cosmonauts could get around outside of their spacecraft. What they came up with was very different from American solutions.
graphicsnickstevens.substack.com/p/upmk-soviet-space-manoeuvring-unit
Spiny Norman said:
Soviet Space Manoeuvring Unit.Early on in the crewed Soviet space program, they were looking at how cosmonauts could get around outside of their spacecraft. What they came up with was very different from American solutions.
graphicsnickstevens.substack.com/p/upmk-soviet-space-manoeuvring-unit
Soviet space speedster!
30 years ago, one decision altered the course of our connected world.
Thirty years ago, listeners tuning into Morning Edition heard about a futuristic idea that could profoundly change their lives.
“Imagine being able to communicate at-will with 10 million people all over the world,” NPR’s Neal Conan said. “Imagine having direct access to catalogs of hundreds of libraries as well as the most up-to-date news, business and weather reports. Imagine being able to get medical advice or gardening advice immediately from any number of experts.
“This is not a dream,” he continued. “It’s internet.”
But even in the early 1990s, that space-age sales pitch was a long way from the lackluster experience of actually using the internet. It was almost entirely text-based, for one.
https://www.npr.org/2023/04/30/1172276538/world-wide-web-internet-anniversary
Spiny Norman said:
30 years ago, one decision altered the course of our connected world.Thirty years ago, listeners tuning into Morning Edition heard about a futuristic idea that could profoundly change their lives.
“Imagine being able to communicate at-will with 10 million people all over the world,” NPR’s Neal Conan said. “Imagine having direct access to catalogs of hundreds of libraries as well as the most up-to-date news, business and weather reports. Imagine being able to get medical advice or gardening advice immediately from any number of experts.
“This is not a dream,” he continued. “It’s internet.”
But even in the early 1990s, that space-age sales pitch was a long way from the lackluster experience of actually using the internet. It was almost entirely text-based, for one.
https://www.npr.org/2023/04/30/1172276538/world-wide-web-internet-anniversary
I loved the sound of dial-up in the morning.
“Imagine being able to get medical advice or gardening advice immediately from any number of experts.”
Indeed, any number.
Although that word ‘experts’ is subject to debate.
Spiny Norman said:
But even in the early 1990s, that space-age sales pitch was a long way from the lackluster experience of actually using the internet. It was almost entirely text-based, for one.
Yeah, no-one these days would bother with a text based web-site.
The Fermi Paradox | A Profound Solution.
https://cosmosmagazine.com/science/biology/worms-cannabinoids-munchies/
Incredible Advances In Nuclear Stirling Engines For Space Exploration.
This odd-looking contraption was among many research experiments conducted decades ago. What you see is a small outboard-powered outrigger hull that is pushing that glider to maintain flight. The engine’s throttle was controlled from the glider cockpit. It looks like fun, but it’s so strange.
Spiny Norman said:
This odd-looking contraption was among many research experiments conducted decades ago. What you see is a small outboard-powered outrigger hull that is pushing that glider to maintain flight. The engine’s throttle was controlled from the glider cockpit. It looks like fun, but it’s so strange.
It’s all great fun until someone loses an eye.
The Startling Reason Entropy & Time Only Go One Way
A Bristol Buccaneer. flying higher than they usually do. :)
All too close, and it would have been an extremely destructive & deadly crash.
No other information on this death trap flying machine.
Spiny Norman said:
No other information on thisdeath trapflying machine.
Fellow’s face says “Woo, let’s go!” but his knickers might tell another tale.
Spiny Norman said:
No other information on thisdeath trapflying machine.
Here you go:
https://www.reddit.com/r/WeirdWings/comments/ywr5ad/gyrodyne_gca55_a_hovercraft_powered_by_a_porsche/
Michael V said:
Spiny Norman said:
No other information on thisdeath trapflying machine.
Here you go:
https://www.reddit.com/r/WeirdWings/comments/ywr5ad/gyrodyne_gca55_a_hovercraft_powered_by_a_porsche/
OK so it ain’t flying nowhere. The fellow is appropriately relaxed.
Michael V said:
Spiny Norman said:
No other information on thisdeath trapflying machine.
Here you go:
https://www.reddit.com/r/WeirdWings/comments/ywr5ad/gyrodyne_gca55_a_hovercraft_powered_by_a_porsche/
Ta. It’s still terrifying to look at though!
Spiny Norman said:
Michael V said:
Spiny Norman said:
No other information on thisdeath trapflying machine.
Here you go:
https://www.reddit.com/r/WeirdWings/comments/ywr5ad/gyrodyne_gca55_a_hovercraft_powered_by_a_porsche/
Ta. It’s still terrifying to look at though!
More information about halfway down this page:
http://www.warbirdinformationexchange.org/phpBB3/viewtopic.php?t=17704
“THE GYRODYNE MODEL GCA-55
The Gyrodyne Model 55 in a single-seat ground cushion vehicle of the annular jet type, powered by a 72 h.p. Porsche four-cylinder engine. It was developed under a U.S. Navy Bureau of Aeronautics contract and flew for the first time in October, 1959.
The basic fuselage structure of the Model 55 consists of the modified forward portion of an XRON-1 Rotorcycle, including the pilot’s seat, control column, rudder pedals and throttle. The pilot’s longitudinal, lateral and directional controls are of the conventional helicopter type. The throttle control is located to the left of the pilot in the position of the collective-pitch control in a helicopter. The cyclic stick and the rudder pedals are connected to a series of vanes located in the annular jet exit.
The vehicle’s air duct is bell-shaped and is constructed of aluminium spinnings. The engine is located to the rear and drives an axial-flow fan of 1.025 pressure ratio. Beneath the fan the air is ducted to an annular jet in the periphery of the base and to radial slots in the base. The annular jet produces the elevated static pressure underneath the base which provides lift augmentation. The radial jets tend to compartmentize the pressurized air beneath the base of the vehicle and thus provide positive static stability.
———————————————-
DIMENSIONS.—
Diameter of air duct 6 ft. (1.83 m.)
Overall height approx. 5 ft. (1.52 m.)
WEIGHTS.—Weight empty 535 lb. (243 kg.)
Max. loaded weight 800 Ib. (363 kg.)
PERFORMANCE.— Operating height above ground approx. 6 in. (15 cm.)”
Sorry. That was the same information, repeated.
Spiny Norman said:
No other information on thisdeath trapflying machine.
“The Gyrodyne Model GCA-55 single-seat ground cushion vehicle of the annular jet type, powered by a 72 h.p. Porsche four-cylinder engine. It was developed under a U.S. Navy Bureau of Aeronautics contract and flew for the first time in October, 1959.”
Spiny Norman said:
No other information on thisdeath trapflying machine.
Looks a lot more safe than Gyrodyne’s XRON-1
Michael V said:
Sorry. That was the same information, repeated.
Just a little bit of history repeating.
Peak Warming Man said:
Michael V said:
Sorry. That was the same information, repeated.
Just a little bit of history repeating.
:)
Why Does Rice Sink Ships?
Speaking of rice, did you know that Budweiser is made from rice as well as hops and barley? Rice makes up 30% of the mix.
dv said:
Speaking of rice, did you know that Budweiser is made from rice as well as hops and barley? Rice makes up 30% of the mix.
no.
dv said:
Speaking of rice, did you know that Budweiser is made from rice as well as hops and barley? Rice makes up 30% of the mix.
This would explain why a lot of American beer is like ricewater.
Why Lightbulbs Might Be The Best Invention Ever
Spiny Norman said:
Why Lightbulbs Might Be The Best Invention Ever
Is it because that, without them, cartoonists would have nothing to put of the character’s head when they have an idea?
captain_spalding said:
Spiny Norman said:
Why Lightbulbs Might Be The Best Invention EverIs it because that, without them, cartoonists would have nothing to put of the character’s head when they have an idea?
Lightbulbs may be the deadliest thing we’ve ever done to the environment.
mollwollfumble said:
captain_spalding said:
Spiny Norman said:
Why Lightbulbs Might Be The Best Invention EverIs it because that, without them, cartoonists would have nothing to put of the character’s head when they have an idea?
Lightbulbs may be the deadliest thing we’ve ever done to the environment.
What?
Worse than taps?
Mrs S. is watching ‘Border Security’.
I can’t watch it, because
(a) it annoys me that Ch 7 continue to dish up the same dozen or so episodes of it on high rotation at prime time on Sunday, and
(b) the forgers of passports etc. whose work they detect are so f***ing lazy. Tonight’s episode has three members of a tour group who have passports with consecutive passport numbers.
Jesus H., even Australian Immigration is likely to notice that sort of thing. Can they not at least put some effort into it? Oh, well, you get what you pay for, i suppose. Dud passports etc. are easy enough to get, but you can save a few bucks and get caught, or lash out and get something convincing.
captain_spalding said:
Mrs S. is watching ‘Border Security’.I can’t watch it, because
(a) it annoys me that Ch 7 continue to dish up the same dozen or so episodes of it on high rotation at prime time on Sunday, and
(b) the forgers of passports etc. whose work they detect are so f***ing lazy. Tonight’s episode has three members of a tour group who have passports with consecutive passport numbers.
Jesus H., even Australian Immigration is likely to notice that sort of thing. Can they not at least put some effort into it? Oh, well, you get what you pay for, i suppose. Dud passports etc. are easy enough to get, but you can save a few bucks and get caught, or lash out and get something convincing.
Wrong thread, although i don’t know how it came to be. Apologies.
mollwollfumble said:
captain_spalding said:
Spiny Norman said:
Why Lightbulbs Might Be The Best Invention EverIs it because that, without them, cartoonists would have nothing to put of the character’s head when they have an idea?
Lightbulbs may be the deadliest thing we’ve ever done to the environment.
Wasn’t that fridges? I thought the CFCs from fridges were the most dangerous substances that humans have unleased on the planet?
ms spock said:
mollwollfumble said:
captain_spalding said:Is it because that, without them, cartoonists would have nothing to put of the character’s head when they have an idea?
Lightbulbs may be the deadliest thing we’ve ever done to the environment.
Wasn’t that fridges? I thought the CFCs from fridges were the most dangerous substances that humans have unleased on the planet?
You obviously haven’t heard of PCB’s.
roughbarked said:
ms spock said:
mollwollfumble said:Lightbulbs may be the deadliest thing we’ve ever done to the environment.
Wasn’t that fridges? I thought the CFCs from fridges were the most dangerous substances that humans have unleased on the planet?
You obviously haven’t heard of PCB’s.
True
In 1913, Sarah Rector, a 10-year-old black girl received a land allotment of 160 acres in Oklahoma. The best farming land was reserved for whites, leaving her with a barren plot. Oil was discovered & she became the country’s first black millionaire:
AI to the rescue protecting deep-sea coral reefs
Our researchers developed a deep learning system that can analyse images to protect deep-sea coral reefs, in a fraction of the time it takes a person.
https://www.csiro.au/news/All/Articles/2023/May/AI-to-the-rescue-protecting-deep-sea-coral
Michael V said:
Spiny Norman said:
Michael V said:
SN: have you seen any of the videos of engines running with see-through combustion chambers and cylinders? They are fascinating.
Not yet. I do remember seeing test engines with quartz cylinders and maybe heads running, so the engineers could see what was happening in the dynamic combustion chamber.
OK. Bump your thread and I’ll drop a few in there. Surprisingly, they use acrylic. One guy has a B&S lawnmower engine a high speed camera, and takes you on a journey with various fuels including turbocharging in combination with nitromethane. He also does see-through turbo-jet, rotary and rocket engines.
Like this?
Spiny Norman said:
Michael V said:
Spiny Norman said:Not yet. I do remember seeing test engines with quartz cylinders and maybe heads running, so the engineers could see what was happening in the dynamic combustion chamber.
OK. Bump your thread and I’ll drop a few in there. Surprisingly, they use acrylic. One guy has a B&S lawnmower engine a high speed camera, and takes you on a journey with various fuels including turbocharging in combination with nitromethane. He also does see-through turbo-jet, rotary and rocket engines.
Like this?
Yep.
Two-stroke motorcycle. Acrylic head and cylinder, including how they made it:
https://www.youtube.com/watch?v=liBRL6Hov-Y&t=18s
OHC motorcycle engine with acrylic cylinder:
https://www.youtube.com/watch?v=nvMcFQqhbpM&t=6s
B&S lawnmower engine, SV with acrylic cylinder head. This is the first of a series of 9 -odd episodes which are quite fascinating:
https://www.youtube.com/watch?v=jdW1t8r8qYc
https://www.youtube.com/watch?v=rURHVLM9nxs
https://www.youtube.com/watch?v=31mtOdHGbB4
Model rocket::
https://www.youtube.com/watch?v=_xvVJQSGHts
Rotary:
https://www.youtube.com/watch?v=jLtyNtf9_ew&t=12s
He also has model wankel rotary, turbojet and RC model engines.
Michael V said:
Spiny Norman said:
Michael V said:OK. Bump your thread and I’ll drop a few in there. Surprisingly, they use acrylic. One guy has a B&S lawnmower engine a high speed camera, and takes you on a journey with various fuels including turbocharging in combination with nitromethane. He also does see-through turbo-jet, rotary and rocket engines.
Like this?
Yep.
Two-stroke motorcycle. Acrylic head and cylinder, including how they made it:
https://www.youtube.com/watch?v=liBRL6Hov-Y&t=18s
OHC motorcycle engine with acrylic cylinder:
https://www.youtube.com/watch?v=nvMcFQqhbpM&t=6s
B&S lawnmower engine, SV with acrylic cylinder head. This is the first of a series of 9 -odd episodes which are quite fascinating:
https://www.youtube.com/watch?v=jdW1t8r8qYc
https://www.youtube.com/watch?v=rURHVLM9nxs
https://www.youtube.com/watch?v=31mtOdHGbB4
Model rocket::
https://www.youtube.com/watch?v=_xvVJQSGHts
Rotary:
https://www.youtube.com/watch?v=jLtyNtf9_ew&t=12s
He also has model wankel rotary, turbojet and RC model engines.
Awesome thanks! I’ll check all those out soon.
FWIW I’ve also got an OS-Max rotary. A beautiful little engine.
Michael V said:
Spiny Norman said:
Michael V said:OK. Bump your thread and I’ll drop a few in there. Surprisingly, they use acrylic. One guy has a B&S lawnmower engine a high speed camera, and takes you on a journey with various fuels including turbocharging in combination with nitromethane. He also does see-through turbo-jet, rotary and rocket engines.
Like this?
Yep.
Two-stroke motorcycle. Acrylic head and cylinder, including how they made it:
https://www.youtube.com/watch?v=liBRL6Hov-Y&t=18s
OHC motorcycle engine with acrylic cylinder:
https://www.youtube.com/watch?v=nvMcFQqhbpM&t=6s
B&S lawnmower engine, SV with acrylic cylinder head. This is the first of a series of 9 -odd episodes which are quite fascinating:
https://www.youtube.com/watch?v=jdW1t8r8qYc
https://www.youtube.com/watch?v=rURHVLM9nxs
https://www.youtube.com/watch?v=31mtOdHGbB4
Model rocket::
https://www.youtube.com/watch?v=_xvVJQSGHts
Rotary:
https://www.youtube.com/watch?v=jLtyNtf9_ew&t=12s
He also has model wankel rotary, turbojet and RC model engines.
I like. Seems he reduced the compression. Would that have been to actually make the perspex survive longer?
Michael V said:
Spiny Norman said:
Michael V said:OK. Bump your thread and I’ll drop a few in there. Surprisingly, they use acrylic. One guy has a B&S lawnmower engine a high speed camera, and takes you on a journey with various fuels including turbocharging in combination with nitromethane. He also does see-through turbo-jet, rotary and rocket engines.
Like this?
Yep.
Two-stroke motorcycle. Acrylic head and cylinder, including how they made it:
https://www.youtube.com/watch?v=liBRL6Hov-Y&t=18s
OHC motorcycle engine with acrylic cylinder:
https://www.youtube.com/watch?v=nvMcFQqhbpM&t=6s
B&S lawnmower engine, SV with acrylic cylinder head. This is the first of a series of 9 -odd episodes which are quite fascinating:
https://www.youtube.com/watch?v=jdW1t8r8qYc
https://www.youtube.com/watch?v=rURHVLM9nxs
https://www.youtube.com/watch?v=31mtOdHGbB4
Model rocket::
https://www.youtube.com/watch?v=_xvVJQSGHts
Rotary:
https://www.youtube.com/watch?v=jLtyNtf9_ew&t=12s
He also has model wankel rotary, turbojet and RC model engines.
See-through turbojet:
https://www.youtube.com/watch?v=MgL0GW248mE
Model wankel rotary:
https://www.youtube.com/watch?v=pCteBhr4dGY
Model wankel rotary to 29,000 rpm:
https://www.youtube.com/watch?v=WW7lDm2×9pw
roughbarked said:
Michael V said:
Spiny Norman said:Like this?
Yep.
Two-stroke motorcycle. Acrylic head and cylinder, including how they made it:
https://www.youtube.com/watch?v=liBRL6Hov-Y&t=18s
OHC motorcycle engine with acrylic cylinder:
https://www.youtube.com/watch?v=nvMcFQqhbpM&t=6s
B&S lawnmower engine, SV with acrylic cylinder head. This is the first of a series of 9 -odd episodes which are quite fascinating:
https://www.youtube.com/watch?v=jdW1t8r8qYc
https://www.youtube.com/watch?v=rURHVLM9nxs
https://www.youtube.com/watch?v=31mtOdHGbB4
Model rocket::
https://www.youtube.com/watch?v=_xvVJQSGHts
Rotary:
https://www.youtube.com/watch?v=jLtyNtf9_ew&t=12s
He also has model wankel rotary, turbojet and RC model engines.
I like. Seems he reduced the compression. Would that have been to actually make the perspex survive longer?
Possibly.
Michael V said:
Michael V said:
Spiny Norman said:Like this?
Yep.
Two-stroke motorcycle. Acrylic head and cylinder, including how they made it:
https://www.youtube.com/watch?v=liBRL6Hov-Y&t=18s
OHC motorcycle engine with acrylic cylinder:
https://www.youtube.com/watch?v=nvMcFQqhbpM&t=6s
B&S lawnmower engine, SV with acrylic cylinder head. This is the first of a series of 9 -odd episodes which are quite fascinating:
https://www.youtube.com/watch?v=jdW1t8r8qYc
https://www.youtube.com/watch?v=rURHVLM9nxs
https://www.youtube.com/watch?v=31mtOdHGbB4
Model rocket::
https://www.youtube.com/watch?v=_xvVJQSGHts
Rotary:
https://www.youtube.com/watch?v=jLtyNtf9_ew&t=12s
He also has model wankel rotary, turbojet and RC model engines.
See-through turbojet:
https://www.youtube.com/watch?v=MgL0GW248mE
Model wankel rotary:
https://www.youtube.com/watch?v=pCteBhr4dGY
Model wankel rotary to 29,000 rpm:
https://www.youtube.com/watch?v=WW7lDm2×9pw
Ta!
See-Thru Engine Running On GUNPOWDER (BOOM!!)
https://www.youtube.com/watch?v=r3HmdcTwHOU
Spiny Norman said:
Michael V said:
Spiny Norman said:I’m mainly after more knowledge on the gearboxes. They are one of the rare bikes that has the gearbox being a bolt-on part to the engine. I’m just trying to find out more about them with the possibility of fitting one to my racing car.
If they are anything like the R-series gearboxes, the spline for the clutch is very fine. With high mileage the input spline wears and will cause the spline in the clutch hub to fail on the over-run. A new clutch plate will suffer the same fate within a couple of thousand kilometres. Both K- and R-series gearboxes are quite clunky and slow-changing, although I’d imagine converting to button-change may make that better.
Ta. If I were to use one I’d have a sensor on the gearstick so that when I applied more than a certain amount of force – enough to start a gearchange – it’d cut the ignition so I could bang it into the next gear.
I’d be using the same clutch that’s on the back of the engine now, it works very well.
I’ll see whether I can find the manual.
If you see Pommie John around (not often these days) you might like to discuss with him, too. He races a BMW R-series which makes 100+ Hp. I don’t remember him having any gearbox trouble, but he did crack a crankcase with the torque it produces.
Michael V said:
Spiny Norman said:
Michael V said:If they are anything like the R-series gearboxes, the spline for the clutch is very fine. With high mileage the input spline wears and will cause the spline in the clutch hub to fail on the over-run. A new clutch plate will suffer the same fate within a couple of thousand kilometres. Both K- and R-series gearboxes are quite clunky and slow-changing, although I’d imagine converting to button-change may make that better.
Ta. If I were to use one I’d have a sensor on the gearstick so that when I applied more than a certain amount of force – enough to start a gearchange – it’d cut the ignition so I could bang it into the next gear.
I’d be using the same clutch that’s on the back of the engine now, it works very well.
I’ll see whether I can find the manual.
If you see Pommie John around (not often these days) you might like to discuss with him, too. He races a BMW R-series which makes 100+ Hp. I don’t remember him having any gearbox trouble, but he did crack a crankcase with the torque it produces.
Ta.
There is an island in the Pacific called Yap that uses circular stones as currency. The stones are too large to move so the ownership of the stones is passed by word of mouth to transact business.
I’ve seen it before and mayybe I got it from here?
Anyway it is always worth looking at again.
The mysterious Traub motorcycle
Found in a secret room.
Quite impressive workmanship.
Crafting an Amethyst D20, then scratching all the edges,
The Hilarious WWII Attempt to Replace Parachutes with Rockets.
Satellite TV before the space age!
Stratovision, was a planned pan-American TV network, using 14 B-29 relay aircraft. It didn’t progress beyond the trials seen in this image.
Spiny Norman said:
Satellite TV before the space age!
Stratovision, was a planned pan-American TV network, using 14 B-29 relay aircraft. It didn’t progress beyond the trials seen in this image.
Interesting, ta.
Spiny Norman said:
Satellite TV before the space age!
Stratovision, was a planned pan-American TV network, using 14 B-29 relay aircraft. It didn’t progress beyond the trials seen in this image.
I can see a problem when landing.
France bans short-haul flights in effort to fight climate change.
France has formally banned domestic flights on short routes that can be covered by train in less than two-and-a-half hours in a move aimed at reducing airline emissions.
The change, which came into effect on Tuesday, will mostly rule out air trips between Paris and regional hubs such as Nantes, Lyon and Bordeaux, with connecting flights unaffected.
Max Boycoff, chairman of environmental studies at the University of Colorado, Boulder, said the French law will be a test case for governments around the world.
“While this material impact is quite minimal – only 2 percent of global emissions come from aviation – in symbolic ways, it has a lot of purchase,” he told Al Jazeera. “The way in which this generates conversations, much like the one we’re having now, can open up further possibilities for emissions cuts elsewhere.”
He noted rail travel represents about one-third of the hydrocarbon emissions compared with flights.
Spiny Norman said:
France bans short-haul flights in effort to fight climate change.France has formally banned domestic flights on short routes that can be covered by train in less than two-and-a-half hours in a move aimed at reducing airline emissions.
The change, which came into effect on Tuesday, will mostly rule out air trips between Paris and regional hubs such as Nantes, Lyon and Bordeaux, with connecting flights unaffected.
Max Boycoff, chairman of environmental studies at the University of Colorado, Boulder, said the French law will be a test case for governments around the world.
“While this material impact is quite minimal – only 2 percent of global emissions come from aviation – in symbolic ways, it has a lot of purchase,” he told Al Jazeera. “The way in which this generates conversations, much like the one we’re having now, can open up further possibilities for emissions cuts elsewhere.”
He noted rail travel represents about one-third of the hydrocarbon emissions compared with flights.
You need to examine the number of people moved between rail and flight. Many business flights could be handled far more efficiently via group internet meetings.
PermeateFree said:
Spiny Norman said:
France bans short-haul flights in effort to fight climate change.France has formally banned domestic flights on short routes that can be covered by train in less than two-and-a-half hours in a move aimed at reducing airline emissions.
The change, which came into effect on Tuesday, will mostly rule out air trips between Paris and regional hubs such as Nantes, Lyon and Bordeaux, with connecting flights unaffected.
Max Boycoff, chairman of environmental studies at the University of Colorado, Boulder, said the French law will be a test case for governments around the world.
“While this material impact is quite minimal – only 2 percent of global emissions come from aviation – in symbolic ways, it has a lot of purchase,” he told Al Jazeera. “The way in which this generates conversations, much like the one we’re having now, can open up further possibilities for emissions cuts elsewhere.”
He noted rail travel represents about one-third of the hydrocarbon emissions compared with flights.
You need to examine the number of people moved between rail and flight. Many business flights could be handled far more efficiently via group internet meetings.
this
Humpback whales create ‘bubble nets’ to snare their prey, sometimes with Fibonacci spiral patterns as showed in this clip by Richard Sidey. Researchers think the spiral patterns have advantages over circular ones.
World population from about 10,000 BCE.
Spiny Norman said:
World population from about 10,000 BCE.
QI, but I wonder how accurate it is.
The Rev Dodgson said:
Spiny Norman said:
World population from about 10,000 BCE.QI, but I wonder how accurate it is.
It is on twitter. I’d argue that therefore the veracity can be questioned.
roughbarked said:
The Rev Dodgson said:
Spiny Norman said:
World population from about 10,000 BCE.QI, but I wonder how accurate it is.
It is on twitter. I’d argue that therefore the veracity can be questioned.
I’d say that any information supplied with no indication of sources or verification procedures could be questioned, even if it wasn’t on Twitter.
That might not be true though.
The Rev Dodgson said:
roughbarked said:
The Rev Dodgson said:QI, but I wonder how accurate it is.
It is on twitter. I’d argue that therefore the veracity can be questioned.
I’d say that any information supplied with no indication of sources or verification procedures could be questioned, even if it wasn’t on Twitter.
That might not be true though.
But the high long term estimated population for Mexico was a surprise to me.
Also Australia was pretty high up there at the start.
The Rev Dodgson said:
roughbarked said:
The Rev Dodgson said:QI, but I wonder how accurate it is.
It is on twitter. I’d argue that therefore the veracity can be questioned.
I’d say that any information supplied with no indication of sources or verification procedures could be questioned, even if it wasn’t on Twitter.
That might not be true though.
Surely they used census data.
Michael V said:
The Rev Dodgson said:
roughbarked said:It is on twitter. I’d argue that therefore the veracity can be questioned.
I’d say that any information supplied with no indication of sources or verification procedures could be questioned, even if it wasn’t on Twitter.
That might not be true though.
Surely they used census data.
One would assume so. Where else would the data come from?
roughbarked said:
Michael V said:
The Rev Dodgson said:I’d say that any information supplied with no indication of sources or verification procedures could be questioned, even if it wasn’t on Twitter.
That might not be true though.
Surely they used census data.
One would assume so. Where else would the data come from?
I hope there were virtual :)s following those last two comments.
The Rev Dodgson said:
roughbarked said:
Michael V said:Surely they used census data.
One would assume so. Where else would the data come from?
I hope there were virtual :)s following those last two comments.
:) :) :)
roughbarked said:
The Rev Dodgson said:
roughbarked said:One would assume so. Where else would the data come from?
I hope there were virtual :)s following those last two comments.
:) :) :)
But seriously folks.
How they do estimates of populations from 10,000 years ago is a reasonable question.
The Rev Dodgson said:
roughbarked said:
The Rev Dodgson said:I hope there were virtual :)s following those last two comments.
:) :) :)
But seriously folks.
How they do estimates of populations from 10,000 years ago is a reasonable question.
Having given this some thought, here’s what I think:
Estimating national populations from 10,000 years ago is a challenging task for archaeologists due to limited available evidence. Since written records are generally absent from that time period, researchers rely on various indirect methods and data sources to make estimations. Here are a few approaches archaeologists may use:
Excavation and Settlement Patterns: Archaeologists analyze the remains of ancient settlements, including the size and density of houses, public buildings, and other structures. By examining the distribution and size of settlements within a given region, they can infer the population density and estimate the total population size.
Food Production and Agricultural Methods: Understanding the agricultural practices and available food resources is crucial for estimating population size. Archaeologists examine evidence related to farming techniques, such as terracing, irrigation systems, and storage facilities, as well as the presence of domesticated plants and animals. By assessing the agricultural potential of the region and calculating the amount of food produced, they can make estimates of population supportability.
Paleodemography: This approach involves studying ancient human skeletal remains to gather information about demographic characteristics such as age, sex, and health. By analyzing burial sites and calculating age-specific mortality rates, archaeologists can make inferences about population size and structure.
Environmental and Climate Data: Researchers investigate paleoclimate data, including pollen records, sediment cores, and ice cores, to understand the environmental conditions of the past. This information helps assess the carrying capacity of the land, the availability of resources, and potential constraints on population growth.
Mathematical Modeling: Archaeologists may employ mathematical models based on available data and assumptions to simulate population growth. These models take into account factors such as birth rates, death rates, migration patterns, and carrying capacity. By running various scenarios, researchers can estimate population sizes under different conditions.
It’s important to note that estimating ancient populations is inherently uncertain, and the results can vary depending on the assumptions made and the quality and quantity of available data. Therefore, population estimations from 10,000 years ago should be seen as rough approximations rather than precise numbers.
The Rev Dodgson said:
The Rev Dodgson said:
roughbarked said::) :) :)
But seriously folks.
How they do estimates of populations from 10,000 years ago is a reasonable question.
Having given this some thought, here’s what I think:
Estimating national populations from 10,000 years ago is a challenging task for archaeologists due to limited available evidence. Since written records are generally absent from that time period, researchers rely on various indirect methods and data sources to make estimations. Here are a few approaches archaeologists may use:
Excavation and Settlement Patterns: Archaeologists analyze the remains of ancient settlements, including the size and density of houses, public buildings, and other structures. By examining the distribution and size of settlements within a given region, they can infer the population density and estimate the total population size.
Food Production and Agricultural Methods: Understanding the agricultural practices and available food resources is crucial for estimating population size. Archaeologists examine evidence related to farming techniques, such as terracing, irrigation systems, and storage facilities, as well as the presence of domesticated plants and animals. By assessing the agricultural potential of the region and calculating the amount of food produced, they can make estimates of population supportability.
Paleodemography: This approach involves studying ancient human skeletal remains to gather information about demographic characteristics such as age, sex, and health. By analyzing burial sites and calculating age-specific mortality rates, archaeologists can make inferences about population size and structure.
Environmental and Climate Data: Researchers investigate paleoclimate data, including pollen records, sediment cores, and ice cores, to understand the environmental conditions of the past. This information helps assess the carrying capacity of the land, the availability of resources, and potential constraints on population growth.
Mathematical Modeling: Archaeologists may employ mathematical models based on available data and assumptions to simulate population growth. These models take into account factors such as birth rates, death rates, migration patterns, and carrying capacity. By running various scenarios, researchers can estimate population sizes under different conditions.
It’s important to note that estimating ancient populations is inherently uncertain, and the results can vary depending on the assumptions made and the quality and quantity of available data. Therefore, population estimations from 10,000 years ago should be seen as rough approximations rather than precise numbers.
Dusts hands off.
Well, that settles that then. Well done.
Michael V said:
The Rev Dodgson said:
The Rev Dodgson said:But seriously folks.
How they do estimates of populations from 10,000 years ago is a reasonable question.
Having given this some thought, here’s what I think:
Estimating national populations from 10,000 years ago is a challenging task for archaeologists due to limited available evidence. Since written records are generally absent from that time period, researchers rely on various indirect methods and data sources to make estimations. Here are a few approaches archaeologists may use:
Excavation and Settlement Patterns: Archaeologists analyze the remains of ancient settlements, including the size and density of houses, public buildings, and other structures. By examining the distribution and size of settlements within a given region, they can infer the population density and estimate the total population size.
Food Production and Agricultural Methods: Understanding the agricultural practices and available food resources is crucial for estimating population size. Archaeologists examine evidence related to farming techniques, such as terracing, irrigation systems, and storage facilities, as well as the presence of domesticated plants and animals. By assessing the agricultural potential of the region and calculating the amount of food produced, they can make estimates of population supportability.
Paleodemography: This approach involves studying ancient human skeletal remains to gather information about demographic characteristics such as age, sex, and health. By analyzing burial sites and calculating age-specific mortality rates, archaeologists can make inferences about population size and structure.
Environmental and Climate Data: Researchers investigate paleoclimate data, including pollen records, sediment cores, and ice cores, to understand the environmental conditions of the past. This information helps assess the carrying capacity of the land, the availability of resources, and potential constraints on population growth.
Mathematical Modeling: Archaeologists may employ mathematical models based on available data and assumptions to simulate population growth. These models take into account factors such as birth rates, death rates, migration patterns, and carrying capacity. By running various scenarios, researchers can estimate population sizes under different conditions.
It’s important to note that estimating ancient populations is inherently uncertain, and the results can vary depending on the assumptions made and the quality and quantity of available data. Therefore, population estimations from 10,000 years ago should be seen as rough approximations rather than precise numbers.
Dusts hands off.
Well, that settles that then. Well done.
I don’t know how accurate or complete the list of suggested methods is, but I can’t argue with the last sentence.
which suggests to me that any estimates from 10,000 years ago are pretty much a guess.
The Rev Dodgson said:
TATE on pre-Columbian Mexicowhich suggests to me that any estimates from 10,000 years ago are pretty much a guess.
Yeah. The estimates for Mexico seemed high especially when neither Egypt or Mesopotamia seemed to get a look in.
Witty Rejoinder said:
The Rev Dodgson said:
TATE on pre-Columbian Mexicowhich suggests to me that any estimates from 10,000 years ago are pretty much a guess.
Yeah. The estimates for Mexico seemed high especially when neither Egypt or Mesopotamia seemed to get a look in.
When you look at sea levels 10,000 years ago, the estimates must be even more of a guess, since presumably a large proportion of the population would have been living in the zone up to 45 metres above the sea level at the time:
I found that graph on a climate-change-denialists web site, but it seems he nicked it off Wikipedia, so that’s all right.
The Rev Dodgson said:
Spiny Norman said:
World population from about 10,000 BCE.QI, but I wonder how accurate it is.
Kind of seems way off, particularly Iran, Iraq and Turkey which were the locations of fairly large settlements even before the dawn of civilisation per se.
SIMULATED Journey from EARTH to the END of the UNIVERSE
Spiny Norman said:
SIMULATED Journey from EARTH to the END of the UNIVERSE
Is there a restaurant?
Witty Rejoinder said:
Spiny Norman said:SIMULATED Journey from EARTH to the END of the UNIVERSEIs there a restaurant?
I want to meet Marvin.
Spiny Norman said:
SIMULATED Journey from EARTH to the END of the UNIVERSE
Ain’t nobody got time for that.
The Rev Dodgson said:
Spiny Norman said:SIMULATED Journey from EARTH to the END of the UNIVERSEAin’t nobody got time for that.
Had a look anyway.
Quite well done :)
15 minutes for the whole think.
Yes, in this video we are going to break the laws of physics a little bit, but it is necessary to try to understand the cosmic magnitudes a little bit better.roughbarked said:
Witty Rejoinder said:
Spiny Norman said:SIMULATED Journey from EARTH to the END of the UNIVERSEIs there a restaurant?
I want to meet Marvin.
He’s the doorman.
Bolwoningen: Neighboruhood of Spherical Homes
Hertogenbosch (“Den Bosch”), Netherlands is home to an unusual neighborhood known as Bolwoningen, which means ball houses. At first glance it looks like post alien invasion scene, but don’t be scared; these houses are occupied by humans only.
In 1968, the Government of the Netherlands decided to fund an experimental construction of low-cost housing. The architect Dris Kreikampa’s project “Bolwoningen” was chosen, but construction began in 1980. Bolwoningen consists of 50 sphere houses. The balls are made of cement, reinforced with fiberglass. They are mounted on the base in the form of a cylinder. Each sphere’s diameter is 18 feet and each has 11 round windows. The layout of these structures is quite unusual. In the centre of the sphere there is a bathroom and a tiny bedroom, and a living room and kitchen, are located on the second floor-level. The house can be completely disassembled and transported to any other place (the weight of this building is only about 2755 lbs). In addition, this building can be placed not only on the ground, but also on water, on a stationary platform.
Spiny Norman said:
Bolwoningen: Neighboruhood of Spherical Homes
Hertogenbosch (“Den Bosch”), Netherlands is home to an unusual neighborhood known as Bolwoningen, which means ball houses. At first glance it looks like post alien invasion scene, but don’t be scared; these houses are occupied by humans only.
In 1968, the Government of the Netherlands decided to fund an experimental construction of low-cost housing. The architect Dris Kreikampa’s project “Bolwoningen” was chosen, but construction began in 1980. Bolwoningen consists of 50 sphere houses. The balls are made of cement, reinforced with fiberglass. They are mounted on the base in the form of a cylinder. Each sphere’s diameter is 18 feet and each has 11 round windows. The layout of these structures is quite unusual. In the centre of the sphere there is a bathroom and a tiny bedroom, and a living room and kitchen, are located on the second floor-level. The house can be completely disassembled and transported to any other place (the weight of this building is only about 2755 lbs). In addition, this building can be placed not only on the ground, but also on water, on a stationary platform.
“hese houses are occupied by humans only.”
Well they would say that, wouldn’t they.
Spiny Norman said:
Bolwoningen: Neighboruhood of Spherical Homes
Hertogenbosch (“Den Bosch”), Netherlands is home to an unusual neighborhood known as Bolwoningen, which means ball houses. At first glance it looks like post alien invasion scene, but don’t be scared; these houses are occupied by humans only.
In 1968, the Government of the Netherlands decided to fund an experimental construction of low-cost housing. The architect Dris Kreikampa’s project “Bolwoningen” was chosen, but construction began in 1980. Bolwoningen consists of 50 sphere houses. The balls are made of cement, reinforced with fiberglass. They are mounted on the base in the form of a cylinder. Each sphere’s diameter is 18 feet and each has 11 round windows. The layout of these structures is quite unusual. In the centre of the sphere there is a bathroom and a tiny bedroom, and a living room and kitchen, are located on the second floor-level. The house can be completely disassembled and transported to any other place (the weight of this building is only about 2755 lbs). In addition, this building can be placed not only on the ground, but also on water, on a stationary platform.
How is this low cost? Spheres are a bitch to make.
The Rev Dodgson said:
Spiny Norman said:
Bolwoningen: Neighboruhood of Spherical Homes
Hertogenbosch (“Den Bosch”), Netherlands is home to an unusual neighborhood known as Bolwoningen, which means ball houses. At first glance it looks like post alien invasion scene, but don’t be scared; these houses are occupied by humans only.
In 1968, the Government of the Netherlands decided to fund an experimental construction of low-cost housing. The architect Dris Kreikampa’s project “Bolwoningen” was chosen, but construction began in 1980. Bolwoningen consists of 50 sphere houses. The balls are made of cement, reinforced with fiberglass. They are mounted on the base in the form of a cylinder. Each sphere’s diameter is 18 feet and each has 11 round windows. The layout of these structures is quite unusual. In the centre of the sphere there is a bathroom and a tiny bedroom, and a living room and kitchen, are located on the second floor-level. The house can be completely disassembled and transported to any other place (the weight of this building is only about 2755 lbs). In addition, this building can be placed not only on the ground, but also on water, on a stationary platform.
“hese houses are occupied by humans only.”
Well they would say that, wouldn’t they.
But where do the children play.
The Rev Dodgson said:
I don’t know how accurate or complete the list of suggested methods is, but I can’t argue with the last sentence.
I’m learning more and more not to trust a word these things say.
A few days ago I asked both ChatGPT and BingAI why the Astronaut Beach House at Cape Canaveral has a flat roof. C-GPT listed off a whole bunch of reasons, but missed the correct hurricane-centric answer. BingAI got the hurricane-proofing answer correct, but then tried to tell me that the beach house is used by Astronauts and their families as shelter during hurricanes. I told it I found that unlikely and it said, yes of course I am correct – the beach house is actually used by NASA officials and their families as shelter during hurricanes. I told it I also found that unlikely, that this is obviously a stupid thing to claim as there are obviously better places for these people to shelter and then BingAI told me “ I don’t want to continue this conversation any more.” and stopped talking to me.
Prototype of the Apollo Spacecraft Guidance Computer from 1962. It was the first computer built from integrated circuits, an advancement borne out of the necessities of making something small enough to fit in the very limited available space.
esselte said:
The Rev Dodgson said:I don’t know how accurate or complete the list of suggested methods is, but I can’t argue with the last sentence.
I’m learning more and more not to trust a word these things say.
A few days ago I asked both ChatGPT and BingAI why the Astronaut Beach House at Cape Canaveral has a flat roof. C-GPT listed off a whole bunch of reasons, but missed the correct hurricane-centric answer. BingAI got the hurricane-proofing answer correct, but then tried to tell me that the beach house is used by Astronauts and their families as shelter during hurricanes. I told it I found that unlikely and it said, yes of course I am correct – the beach house is actually used by NASA officials and their families as shelter during hurricanes. I told it I also found that unlikely, that this is obviously a stupid thing to claim as there are obviously better places for these people to shelter and then BingAI told me “ I don’t want to continue this conversation any more.” and stopped talking to me.
and thus, walked off in a huff.
Spiny Norman said:
Prototype of the Apollo Spacecraft Guidance Computer from 1962. It was the first computer built from integrated circuits, an advancement borne out of the necessities of making something small enough to fit in the very limited available space.
Looks like a giant abacus.
Multi-layer reactive foil: no fuel, no oxygen, tons of heat.
When marine biologist Roger Hanlon caught this creature on camera, he said he screamed bloody murder. And no wonder. A superb visualization of how chromatophores allow an octopus to blend in with the backdrops.
Spiny Norman said:
When marine biologist Roger Hanlon caught this creature on camera, he said he screamed bloody murder. And no wonder. A superb visualization of how chromatophores allow an octopus to blend in with the backdrops.
He said it was really cool. He knew he was lying.
Spiny Norman said:
When marine biologist Roger Hanlon caught this creature on camera, he said he screamed bloody murder. And no wonder. A superb visualization of how chromatophores allow an octopus to blend in with the backdrops.
Very impressive.
Bubblecar said:
Spiny Norman said:
When marine biologist Roger Hanlon caught this creature on camera, he said he screamed bloody murder. And no wonder. A superb visualization of how chromatophores allow an octopus to blend in with the backdrops.Very impressive.
Indeed it was. The theory needs a little more work but it does look, what’s the word? Plausible?
roughbarked said:
Bubblecar said:
Spiny Norman said:
When marine biologist Roger Hanlon caught this creature on camera, he said he screamed bloody murder. And no wonder. A superb visualization of how chromatophores allow an octopus to blend in with the backdrops.Very impressive.
Indeed it was. The theory needs a little more work but it does look, what’s the word? Plausible?
Being someone whom has done a lot of different types of soldering and welding of all sorts of metals and all that, I still wonder, like he did, about how much flux do I need?
roughbarked said:
roughbarked said:
Bubblecar said:Very impressive.
Indeed it was. The theory needs a little more work but it does look, what’s the word? Plausible?
Being someone whom has done a lot of different types of soldering and welding of all sorts of metals and all that, I still wonder, like he did, about how much flux do I need?
I think you’re replying to the wrong post :)
This one’s about octopuses.
Bubblecar said:
roughbarked said:
roughbarked said:Indeed it was. The theory needs a little more work but it does look, what’s the word? Plausible?
Being someone whom has done a lot of different types of soldering and welding of all sorts of metals and all that, I still wonder, like he did, about how much flux do I need?
I think you’re replying to the wrong post :)
This one’s about octopuses.
Do you want me to load the whole thread?
Bubblecar said:
Spiny Norman said:
When marine biologist Roger Hanlon caught this creature on camera, he said he screamed bloody murder. And no wonder. A superb visualization of how chromatophores allow an octopus to blend in with the backdrops.Very impressive.
I actually clicked the wrong link in my toolbar.
roughbarked said:
Bubblecar said:
Spiny Norman said:
When marine biologist Roger Hanlon caught this creature on camera, he said he screamed bloody murder. And no wonder. A superb visualization of how chromatophores allow an octopus to blend in with the backdrops.Very impressive.
I actually clicked the wrong link in my toolbar.
and maybe walked away and came back. Who knows but that’s what happened.
roughbarked said:
roughbarked said:
Bubblecar said:Very impressive.
I actually clicked the wrong link in my toolbar.
and maybe walked away and came back. Who knows but that’s what happened.
This is the one I meant to post.
Bubblecar said:
Spiny Norman said:
When marine biologist Roger Hanlon caught this creature on camera, he said he screamed bloody murder. And no wonder. A superb visualization of how chromatophores allow an octopus to blend in with the backdrops.Very impressive.
Iontach! Wonderful!
The Fascinating Story of One of the Most Elegant and Powerful Experiments in the History of Science.
The Foucault Pendulum.
.
https://www.youtube.com/watch?v=aJxCE8tZu4E
Spiny Norman said:
The Fascinating Story of One of the Most Elegant and Powerful Experiments in the History of Science.
The Foucault Pendulum.
.
https://www.youtube.com/watch?v=aJxCE8tZu4E
And Zero grams of sugar.
How China Got the Bomb.
The National Fisheries Development Board is located in Hyderabad, India.
https://en.wikipedia.org/wiki/National_Fisheries_Development_Board_building
Spiny Norman said:
The National Fisheries Development Board is located in Hyderabad, India.
https://en.wikipedia.org/wiki/National_Fisheries_Development_Board_building
I wonder what they keep in the tail..
Spiny Norman said:
The National Fisheries Development Board is located in Hyderabad, India.
https://en.wikipedia.org/wiki/National_Fisheries_Development_Board_building
Talk about a fish out of water.
Arts said:
Spiny Norman said:
The National Fisheries Development Board is located in Hyderabad, India.
https://en.wikipedia.org/wiki/National_Fisheries_Development_Board_building
I wonder what they keep in the tail..
I really don’t think it is solar panels.
Arts said:
Spiny Norman said:
The National Fisheries Development Board is located in Hyderabad, India.
https://en.wikipedia.org/wiki/National_Fisheries_Development_Board_building
I wonder what they keep in the tail..
That’s where they hide their embarrassment…
Spiny Norman said:
The National Fisheries Development Board is located in Hyderabad, India.
https://en.wikipedia.org/wiki/National_Fisheries_Development_Board_building
Yeah, I’ll pay that. More interesting than a plain modernist block.
party_pants said:
Spiny Norman said:
The National Fisheries Development Board is located in Hyderabad, India.
https://en.wikipedia.org/wiki/National_Fisheries_Development_Board_building
Yeah, I’ll pay that. More interesting than a plain modernist block.
They should have made the tail flap.
How the CIA Secretly Spied On Climate Change.
https://www.youtube.com/watch?v=4-jNnr0zhFU
The start of the use of satellites to monitor changes on the Earth originated by someone I would not have guessed. They have gone up a notch in my mind for that. That is talked about around halfway through the video.
Spiny Norman said:
How the CIA Secretly Spied On Climate Change.https://www.youtube.com/watch?v=4-jNnr0zhFU
The start of the use of satellites to monitor changes on the Earth originated by someone I would not have guessed. They have gone up a notch in my mind for that. That is talked about around halfway through the video.
Did they then try to work out how to use it to overthrow the leader/government democratically elected by the people whose nation is compliant with USA requests and replace him with a dictator.
Cymek said:
Spiny Norman said:
How the CIA Secretly Spied On Climate Change.https://www.youtube.com/watch?v=4-jNnr0zhFU
The start of the use of satellites to monitor changes on the Earth originated by someone I would not have guessed. They have gone up a notch in my mind for that. That is talked about around halfway through the video.
Did they then try to work out how to use it to overthrow the leader/government democratically elected by the people whose nation isn’t compliant with USA requests and replace him with a dictator.
The most remarkable and advanced airliner ever made, the Concorde.
Spiny Norman said:
The most remarkable and advanced airliner ever made, the Concorde.
I saw a set of detailed photos of the Concorde cockpit.
Flight engineer’s station had four buttons labelled ‘REHEAT’.
An airliner with afterburners. I was sold.
captain_spalding said:
Spiny Norman said:
The most remarkable and advanced airliner ever made, the Concorde.I saw a set of detailed photos of the Concorde cockpit.
Flight engineer’s station had four buttons labelled ‘REHEAT’.
An airliner with afterburners. I was sold.
:)
captain_spalding said:
Spiny Norman said:
The most remarkable and advanced airliner ever made, the Concorde.I saw a set of detailed photos of the Concorde cockpit.
Flight engineer’s station had four buttons labelled ‘REHEAT’.
An airliner with afterburners. I was sold.
Everything is better with afterburners.
EVERYTHING.
Spiny Norman said:
captain_spalding said:
Spiny Norman said:
The most remarkable and advanced airliner ever made, the Concorde.I saw a set of detailed photos of the Concorde cockpit.
Flight engineer’s station had four buttons labelled ‘REHEAT’.
An airliner with afterburners. I was sold.
Everything is better with afterburners.
EVERYTHING.
Except food.
Spiny Norman said:
captain_spalding said:
Spiny Norman said:
The most remarkable and advanced airliner ever made, the Concorde.I saw a set of detailed photos of the Concorde cockpit.
Flight engineer’s station had four buttons labelled ‘REHEAT’.
An airliner with afterburners. I was sold.
Everything is better with afterburners.
EVERYTHING.
To a point.
As a bloke i knew put it, ‘sure, a Mirage can whiz past at Mach 2, but if he doesn’t get me on his first pass, then it’s always going to be a turning fight, and it’ll always be my A-4 that wins that’.
captain_spalding said:
Spiny Norman said:
captain_spalding said:I saw a set of detailed photos of the Concorde cockpit.
Flight engineer’s station had four buttons labelled ‘REHEAT’.
An airliner with afterburners. I was sold.
Everything is better with afterburners.
EVERYTHING.
To a point.
As a bloke i knew put it, ‘sure, a Mirage can whiz past at Mach 2, but if he doesn’t get me on his first pass, then it’s always going to be a turning fight, and it’ll always be my A-4 that wins that’.
Tamb said:
captain_spalding said:
Spiny Norman said:Everything is better with afterburners.
EVERYTHING.
To a point.
As a bloke i knew put it, ‘sure, a Mirage can whiz past at Mach 2, but if he doesn’t get me on his first pass, then it’s always going to be a turning fight, and it’ll always be my A-4 that wins that’.
The Mirage wouldn’t stick around if it missed on its first pass.
I think that a Mach 3 missile would have been dispatched to accompany him.
Tamb said:
Spiny Norman said:
captain_spalding said:I saw a set of detailed photos of the Concorde cockpit.
Flight engineer’s station had four buttons labelled ‘REHEAT’.
An airliner with afterburners. I was sold.
Everything is better with afterburners.
EVERYTHING.
Except food.
Oh, I don’t know. Chilli con carne, vindaloo curries, Christmas puddings come to mind immediately.
Michael V said:
Tamb said:
Spiny Norman said:Everything is better with afterburners.
EVERYTHING.
Except food.
Oh, I don’t know. Chilli con carne, vindaloo curries, Christmas puddings come to mind immediately.
Spicy Xmas pudding?
Michael V said:
Tamb said:
Spiny Norman said:Everything is better with afterburners.
EVERYTHING.
Except food.
Oh, I don’t know. Chilli con carne, vindaloo curries, Christmas puddings come to mind immediately.
Witty Rejoinder said:
Michael V said:
Tamb said:Except food.
Oh, I don’t know. Chilli con carne, vindaloo curries, Christmas puddings come to mind immediately.
Spicy Xmas pudding?
Brandy, poured over and lit up to serve.
Michael V said:
Witty Rejoinder said:
Michael V said:Oh, I don’t know. Chilli con carne, vindaloo curries, Christmas puddings come to mind immediately.
Spicy Xmas pudding?
Brandy, poured over and lit up to serve.
How spicy though? Comparable to a hot vindaloo?
Witty Rejoinder said:
Michael V said:
Witty Rejoinder said:Spicy Xmas pudding?
Brandy, poured over and lit up to serve.
How spicy though? Comparable to a hot vindaloo?
Sweet and Christmas pudding-y.
Rotomoulding large plastic tanks.
Spiny Norman said:
Rotomoulding large plastic tanks.
I have a 5000l one.
JudgeMental said:
Spiny Norman said:
Rotomoulding large plastic tanks.I have a 5000l one.
On one of the CAD courses I did at uni, we had to design a rotomoulded thing. I designed a large round hut that could be assembled with a few people in under and hour. Great fun!
This would make such a mess of the carpet.
British Steel Mill Cobble.
JudgeMental said:
Spiny Norman said:
Rotomoulding large plastic tanks.I have a 5000l one.
My two rotomoulded tanks are 47300 & 5000 litres.
A great video on the very very small to the very very large.
Snuffing candles with CO2.
Astronomers ‘Puzzled’ by The Largest Cosmic Explosion We’ve Observed.
Astronomers said on Friday they have identified the “largest” cosmic explosion ever observed, a fireball 100 times the size of our Solar System that suddenly began blazing in the distant universe more than three years ago.
While the astronomers offered what they think is the most likely explanation for the explosion, they emphasized that more research was needed to understand the puzzling phenomenon.
The explosion, called AT2021lwx, is not the brightest flash ever observed in the universe. That record is still held by a gamma-ray burst in October that was nicknamed BOAT – for Brightest Of All Time.
Philip Wiseman, an astrophysicist at Britain’s University of Southampton and the lead author of a new study, said that AT2021lwx was considered the “largest” explosion because it had released far more energy over the last three years than was produced by BOAT’s brief flash.
https://www.sciencealert.com/astronomers-puzzled-by-the-largest-cosmic-explosion-weve-observed
6 June 1944. P-47 on Juno beach.
Spiny Norman said:
6 June 1944. P-47 on Juno beach.
And a busted DD Sherman.
captain_spalding said:
Spiny Norman said:
6 June 1944. P-47 on Juno beach.
And a busted DD Sherman.
Sure is. At least it made it to the beach instead of turning into a one-way submarine.
Spiny Norman said:
captain_spalding said:
Spiny Norman said:
6 June 1944. P-47 on Juno beach.
And a busted DD Sherman.
Sure is. At least it made it to the beach instead of turning into a one-way submarine.
The same stretch of beach today. You can easily locate the spot in the D-Day pic.
Apparently, the plane is P-47 Thunderbolt (42-76279) from 365th Fighter Bomber Group 386th Fighter Squadron U.S. Army Air Force, which was flown by 2nd Lt. John Weese (age 23). He was killed in the attempted landing,
6 June 1944. Operation Neptune, Captain Thomas Francis Mantell, Jr., His Douglas C-47 Skytrain (6Z), glider tug, `Vulture’s Delight’, 96th Troop Carrier Squadron, was hit by flak. He successfully completed his mission, returned to England and was awarded the DFC.
Just a bit of a mess there, I’m amazed that it could still fly.
The Spool Paradox.
Spiny Norman said:
The Spool Paradox.
I was just thinking OK, but it’s not a paradox, then I scrolled down and read the guy’s response to my thoughts :)
How did he do that?
It’s a paradox!
A composite photo of a morning and afternoon from the Curiosity rover on Mars.
The chances of finding life on Enceladus has increased a notch.
mashable.com/article/enceladus-saturn-moon-ocean-discovery-habitable
Spiny Norman said:
A composite photo of a morning and afternoon from the Curiosity rover on Mars.
Looks cold.
I use a petrol price app called PetrolSpy. I just found it interesting the difference between the price cycles of the major cities.
Spiny Norman said:
I use a petrol price app called PetrolSpy. I just found it interesting the difference between the price cycles of the major cities.
Perth prices follow a very clear weekly trend
Quite a remarkable survival story.
Surviving a power line strike in a Sabre!
Spiny Norman said:
Quite a remarkable survival story.Surviving a power line strike in a Sabre!
Indeed.
roughbarked said:
Spiny Norman said:
Quite a remarkable survival story.Surviving a power line strike in a Sabre!
Indeed.
They built ‘em tough.
captain_spalding said:
roughbarked said:
Spiny Norman said:
Quite a remarkable survival story.Surviving a power line strike in a Sabre!
Indeed.
They built ‘em tough.
It was only copper and it was hit at a fair rate of knots. it was more about the wire breaking that saved the aircrafft from more severe damage. That it was only a single wire also was an obvious advantage.
roughbarked said:
captain_spalding said:
roughbarked said:Indeed.
They built ‘em tough.
It was only copper and it was hit at a fair rate of knots. it was more about the wire breaking that saved the aircrafft from more severe damage. That it was only a single wire also was an obvious advantage.
I think there was two wires.
One cut the air intake, the second scraped the cockpit and cut the tail.
roughbarked said:
captain_spalding said:
roughbarked said:Indeed.
They built ‘em tough.
It was only copper and it was hit at a fair rate of knots. it was more about the wire breaking that saved the aircrafft from more severe damage. That it was only a single wire also was an obvious advantage.
The second wire was deflected partly and the first was broken before the second hit the tail.
All around it was an extremely lucky event for one that could have been a lot worse..
captain_spalding said:
roughbarked said:
captain_spalding said:They built ‘em tough.
It was only copper and it was hit at a fair rate of knots. it was more about the wire breaking that saved the aircrafft from more severe damage. That it was only a single wire also was an obvious advantage.
I think there was two wires.
One cut the air intake, the second scraped the cockpit and cut the tail.
Yeah. I remembered to put that in my next post.
I’ve heard/seen discussions about whether the Australian or the Canadian Sabres were the best of the variants.
While both have been pronounced as superior to the North American-made Sabres, some say that the Canadian Sabre, with its Orenda turbojet, was the better plane, but other say that the Australians jets’ Avon engine was at least as good, and its two 30mm cannon gave it punch that the Canadian jets’ six .50-cal machine guns could not match.
captain_spalding said:
I’ve heard/seen discussions about whether the Australian or the Canadian Sabres were the best of the variants.While both have been pronounced as superior to the North American-made Sabres, some say that the Canadian Sabre, with its Orenda turbojet, was the better plane, but other say that the Australians jets’ Avon engine was at least as good, and its two 30mm cannon gave it punch that the Canadian jets’ six .50-cal machine guns could not match.
Sounds right.
roughbarked said:
captain_spalding said:
I’ve heard/seen discussions about whether the Australian or the Canadian Sabres were the best of the variants.While both have been pronounced as superior to the North American-made Sabres, some say that the Canadian Sabre, with its Orenda turbojet, was the better plane, but other say that the Australians jets’ Avon engine was at least as good, and its two 30mm cannon gave it punch that the Canadian jets’ six .50-cal machine guns could not match.
Sounds right.
Lt Roberts in his ‘modified’ TBM Avenger!
Flak blew off his port outer wing, causing him to collide with another TBM (which spun in), see rear fuselage! His crew baled out and were made Japanese POWs, but Roberts made it home to ditch near a US Navy destroyer and was rescued.
Spiny Norman said:
Lt Roberts in his ‘modified’ TBM Avenger!
Flak blew off his port outer wing, causing him to collide with another TBM (which spun in), see rear fuselage! His crew baled out and were made Japanese POWs, but Roberts made it home to ditch near a US Navy destroyer and was rescued.
The Grumman firm was popularly known as ‘The Ironworks’, and the sturdiness of its products is the obvious source of the nickname.
They built the lunar landers for the Apollo moon flights. The machinery just HAD to work, so they got Grumman to do it.
“Wow. This is a Russian helicopter reportedly being engaged by Wagner with a Strella SAM. A great demo of how rapid manoeuvres and flares combines can save your ass. Very close call. Don’t think I’ve ever seen a video of anything like this.”
“In one of the most notable moments in sports history, Kenyan runner Abel Mutai was just a few feet from the finish line, but became confused with the signage and stopped thinking he had completed the race.
A Spanish athlete, Ivan Fernandez, was right behind him, and after realizing what was happening, he started shouting at the Kenyan for him to continue running; but Mutai didn’t understand his Spanish.
Fernandez eventually caught up to him and instead of passing him, he pushed him to victory.
A journalist asked Ivan, “Why did you do that?”
Ivan replied, “My dream is that someday we can have a kind of community life where we push and help each other to win.” The journalist insisted “But why did you let the Kenyan win?” Ivan replied, “I didn’t let him win, he was going to win.” The journalist insisted again, “But you could have won!”Ivan looked at him & replied, “But what would be the merit of my victory? What would be the honor of that medal?
What would my Mom think of that?”
Values are transmitted from generation to generation.
What values are we teaching our children?
Let us not teach our kids the wrong ways to WIN.”
My fave cold war interceptor, the English Electric Lightning.
Spiny Norman said:
“Wow. This is a Russian helicopter reportedly being engaged by Wagner with a Strella SAM. A great demo of how rapid manoeuvres and flares combines can save your ass. Very close call. Don’t think I’ve ever seen a video of anything like this.”
In that video clip I see flares deployed and a missile leaving the helicopter.
I don’t see any incoming missile?
Spiny Norman said:
“In one of the most notable moments in sports history, Kenyan runner Abel Mutai was just a few feet from the finish line, but became confused with the signage and stopped thinking he had completed the race.A Spanish athlete, Ivan Fernandez, was right behind him, and after realizing what was happening, he started shouting at the Kenyan for him to continue running; but Mutai didn’t understand his Spanish.
Fernandez eventually caught up to him and instead of passing him, he pushed him to victory.
A journalist asked Ivan, “Why did you do that?”
Ivan replied, “My dream is that someday we can have a kind of community life where we push and help each other to win.” The journalist insisted “But why did you let the Kenyan win?” Ivan replied, “I didn’t let him win, he was going to win.” The journalist insisted again, “But you could have won!”Ivan looked at him & replied, “But what would be the merit of my victory? What would be the honor of that medal?
What would my Mom think of that?”Values are transmitted from generation to generation.
What values are we teaching our children?
Let us not teach our kids the wrong ways to WIN.”
Interesting. Very interesting.
Peak Warming Man said:
Spiny Norman said:
“Wow. This is a Russian helicopter reportedly being engaged by Wagner with a Strella SAM. A great demo of how rapid manoeuvres and flares combines can save your ass. Very close call. Don’t think I’ve ever seen a video of anything like this.”In that video clip I see flares deployed and a missile leaving the helicopter.
I don’t see any incoming missile?
Tthe flares are put out before the missile arrives and it then follows them and indeed misses its original target which was indeed the helicopter. Pause it and you’ll see where the missile comes from.
Spiny Norman said:
My fave cold war interceptor, the English Electric Lightning.
Peak Warming Man said:
Spiny Norman said:
“Wow. This is a Russian helicopter reportedly being engaged by Wagner with a Strella SAM. A great demo of how rapid manoeuvres and flares combines can save your ass. Very close call. Don’t think I’ve ever seen a video of anything like this.”In that video clip I see flares deployed and a missile leaving the helicopter.
I don’t see any incoming missile?
That missile isn’t from the helicopter, it was attacking it and the flares saved them.
Spiny Norman said:
My fave cold war interceptor, the English Electric Lightning.
Was it you who posted that quote from someone who was making their first flight in a Lightning? Something like:
‘I thought i was doing pretty well, managing it ok.
Then the brakes came off…’
Spiny Norman said:
Peak Warming Man said:
Spiny Norman said:
“Wow. This is a Russian helicopter reportedly being engaged by Wagner with a Strella SAM. A great demo of how rapid manoeuvres and flares combines can save your ass. Very close call. Don’t think I’ve ever seen a video of anything like this.”In that video clip I see flares deployed and a missile leaving the helicopter.
I don’t see any incoming missile?
That missile isn’t from the helicopter, it was attacking it and the flares saved them.
This.
captain_spalding said:
Spiny Norman said:
My fave cold war interceptor, the English Electric Lightning.
Was it you who posted that quote from someone who was making their first flight in a Lightning? Something like:
‘I thought i was doing pretty well, managing it ok.
Then the brakes came off…’
Don’t think it ever fired a shot in anger.
captain_spalding said:
Spiny Norman said:
My fave cold war interceptor, the English Electric Lightning.
Was it you who posted that quote from someone who was making their first flight in a Lightning? Something like:
‘I thought i was doing pretty well, managing it ok.
Then the brakes came off…’
Peak Warming Man said:
captain_spalding said:
Spiny Norman said:
My fave cold war interceptor, the English Electric Lightning.
Was it you who posted that quote from someone who was making their first flight in a Lightning? Something like:
‘I thought i was doing pretty well, managing it ok.
Then the brakes came off…’
Don’t think it ever fired a shot in anger.
Fortunately not.
Peak Warming Man said:
Spiny Norman said:
“Wow. This is a Russian helicopter reportedly being engaged by Wagner with a Strella SAM. A great demo of how rapid manoeuvres and flares combines can save your ass. Very close call. Don’t think I’ve ever seen a video of anything like this.”In that video clip I see flares deployed and a missile leaving the helicopter.
I don’t see any incoming missile?
You havevto look closely, and it may take a couple of viewings, but you can see the missile’s trail coming in from astern of the helicopter.
Spiny Norman said:
Peak Warming Man said:
captain_spalding said:Was it you who posted that quote from someone who was making their first flight in a Lightning? Something like:
‘I thought i was doing pretty well, managing it ok.
Then the brakes came off…’
Don’t think it ever fired a shot in anger.
Fortunately not.
which was lucky for the people it didn’t fire at.
25 June 1944. Boeing B-17G-35VE bomber (42-97890) “Queen of Hearts” (“Lil`Satan”) from 524th bomber squadron of the 379th bomber group, 8th USAF after return from an air raid. Flak killed bomb aimer, navigator bailed & died in German hospital. Tail gunner bailed and became POW.
Spiny Norman said:
25 June 1944. Boeing B-17G-35VE bomber (42-97890) “Queen of Hearts” (“Lil`Satan”) from 524th bomber squadron of the 379th bomber group, 8th USAF after return from an air raid. Flak killed bomb aimer, navigator bailed & died in German hospital. Tail gunner bailed and became POW.
It was built by Vega Aircraft at Burbank, California. One of 500 B-17Fs and 2,250 B-17Gs built there. Vega made the last B-17 built, in August 1945.
From Lab to Table: I Tasted the World’s First Cultivated Meat!
I hope this really takes off.
Yet another good video on the catastrophic failure of the Titan submarine.
Spiny Norman said:
Yet another good video on the catastrophic failure of the Titan submarine.
Mythbusters last night had the implosion of the rail road carriage using a vacuum pump, impressive
Spiny Norman said:
Yet another good video on the catastrophic failure of the Titan submarine.
I’m still thinking
Stupidity
Insurance scam
Murder suicide
wookiemeister said:
Spiny Norman said:
Yet another good video on the catastrophic failure of the Titan submarine.
When discovered the thing was made from carbon fibre I was fairly sure what had happenedI’m still thinking
Stupidity
Insurance scam
Murder suicide
Arrogance and incompetence
Cymek said:
wookiemeister said:
Spiny Norman said:
Yet another good video on the catastrophic failure of the Titan submarine.
When discovered the thing was made from carbon fibre I was fairly sure what had happenedI’m still thinking
Stupidity
Insurance scam
Murder suicide
Arrogance and incompetence
Probably a combination of two or more of the above.
captain_spalding said:
Cymek said:
wookiemeister said:When discovered the thing was made from carbon fibre I was fairly sure what had happened
I’m still thinking
Stupidity
Insurance scam
Murder suicide
Arrogance and incompetence
Probably a combination of two or more of the above.
Can understand wanting to try a different design and construction method, but not on the cheap and following safety procedures.
That deep in the ocean could humans actually do much down there, mining for example would it be economically feasible and practical
captain_spalding said:
Cymek said:
wookiemeister said:When discovered the thing was made from carbon fibre I was fairly sure what had happened
I’m still thinking
Stupidity
Insurance scam
Murder suicide
Arrogance and incompetence
Probably a combination of two or more of the above.
Insurance scam? how would that work?
Peak Warming Man said:
captain_spalding said:
Cymek said:Arrogance and incompetence
Probably a combination of two or more of the above.
Insurance scam? how would that work?
Life insurance.
Peak Warming Man said:
captain_spalding said:
Cymek said:Arrogance and incompetence
Probably a combination of two or more of the above.
Insurance scam? how would that work?
Family in financial difficulty? Or, got some reason to think you won’t be around to provide for them in the future?
Get insured for squillions, then die in an ‘accident’ at the bottom of the sea.
captain_spalding said:
Peak Warming Man said:
captain_spalding said:Probably a combination of two or more of the above.
Insurance scam? how would that work?
Family in financial difficulty? Or, got some reason to think you won’t be around to provide for them in the future?
Get insured for squillions, then die in an ‘accident’ at the bottom of the sea.
Sorry “We cover explosion, but not implosion”
Cymek said:
captain_spalding said:
Peak Warming Man said:Insurance scam? how would that work?
Family in financial difficulty? Or, got some reason to think you won’t be around to provide for them in the future?
Get insured for squillions, then die in an ‘accident’ at the bottom of the sea.
Sorry “We cover explosion, but not implosion”
I wouldn’t doubt that they’d try it on.
Peak Warming Man said:
captain_spalding said:
Cymek said:Arrogance and incompetence
Probably a combination of two or more of the above.
Insurance scam? how would that work?
And by letting down his guard PWM fell into the Wookieverse…
Witty Rejoinder said:
Peak Warming Man said:
captain_spalding said:Probably a combination of two or more of the above.
Insurance scam? how would that work?
And by letting down his guard PWM fell into the Wookieverse…
LOLOL
Cymek said:
wookiemeister said:
Spiny Norman said:
Yet another good video on the catastrophic failure of the Titan submarine.
When discovered the thing was made from carbon fibre I was fairly sure what had happenedI’m still thinking
Stupidity
Insurance scam
Murder suicide
Arrogance and incompetence
yes. Did his own research.
4 July 1983. Launch of BOR-5, Russian space vehicle from Kapustin Yar LC107/1. 1:8 Buran model designed to test the main aerodynamic characteristics, thermal and acoustic loads and stability for the Shuttle Buran program.
‘Oumuamua Is Not the Only Object Inexplicably Accelerating.
Kontayner – Russia’s BIGGER & BETTER Over The Horizon RADAR.
Spiny Norman said:
Kontayner – Russia’s BIGGER & BETTER Over The Horizon RADAR.
Number stations
What Happens if You’re Hit by Sonar?
Groundbreaking research transmits energy from space to Earth.
I’m dubious, but here’s the article. Good to see that they’re putting their money into it at least.
‘An Alternative Theory of Inertia will Get Tested in Space.’
The Rev may find this of interest.
Compliant Mechanisms that LEARN! – Mechanical Neural Network Architected Materials.
When the fighter pilot will NOT take no for an answer.
Singlet Oxygen Is Scary!
Oh this is just lovely. :(
Ice core from secret US Army base reveals dramatic historical Greenland ice-sheet melting.
Spiny Norman said:
Oh this is just lovely. :(Ice core from secret US Army base reveals dramatic historical Greenland ice-sheet melting.
That is another very big nail in our coffin. Below the last part of the article.
>>What this study shows, Dr Noble says, is we’ve already got the conditions for the Greenland ice sheet to melt, but the time frame is the million dollar question.
“Basically, the ice sheets haven’t had time to catch up with the amount of warming that’s present in the atmosphere and the oceans,” she said.
“And that’s what I guess is hard for people to comprehend, that we’ve actually locked ourselves in for thousands of years of warming and sea level rise.
“Even if humans make sacrifices and societies change rapidly, there’s still this inertia in the whole Earth system.”
If the entire Greenland ice sheet went, enough water would be released to put most of the world’s major cities underwater, she said.
The only thing that could buy us more time, Professor Bierman added, was to get greenhouse gas emissions down.
“There’s a fantastic paper that came out of Oregon about 10 years ago, that basically said the next hundred years of policy is going to decide the next 10,000 years of Earth’s history,” he said.
“Basically what it means is if we don’t get our act together and not only cut carbon emissions, but bring the atmospheric levels of carbon dioxide back down, these ice sheets are in trouble.”<<
Everything is melting.
Damn war …. :(
26 July 1945. The HMS Sussex Task Force was intercepted by two attack bombers acting as kamikaze suicide weapons. One made an imprint on the side of Sussex, from which it could be identified as a Mitsubishi Ki-51 “Sonia”.
Spiny Norman said:
Damn war …. :(26 July 1945. The HMS Sussex Task Force was intercepted by two attack bombers acting as kamikaze suicide weapons. One made an imprint on the side of Sussex, from which it could be identified as a Mitsubishi Ki-51 “Sonia”.
wHere Are tHe WinGS????!!!!!
Spiny Norman said:
Damn war …. :(26 July 1945. The HMS Sussex Task Force was intercepted by two attack bombers acting as kamikaze suicide weapons. One made an imprint on the side of Sussex, from which it could be identified as a Mitsubishi Ki-51 “Sonia”.
Sure made a mess of the pilot.
Arts said:
Spiny Norman said:
Damn war …. :(26 July 1945. The HMS Sussex Task Force was intercepted by two attack bombers acting as kamikaze suicide weapons. One made an imprint on the side of Sussex, from which it could be identified as a Mitsubishi Ki-51 “Sonia”.
wHere Are tHe WinGS????!!!!!
they are but a shadow of their former selves.
Spiny Norman said:
Damn war …. :(26 July 1945. The HMS Sussex Task Force was intercepted by two attack bombers acting as kamikaze suicide weapons. One made an imprint on the side of Sussex, from which it could be identified as a Mitsubishi Ki-51 “Sonia”.
Interesting images, nonetheless.
How Does The Anti-Gravity Wheel Work?
The First Room-Temperature Ambient-Pressure Superconductor.
(I hope!)
The Bristol Brabazon, seen undergoing flight testing in the early 1950s. It looks as underpowered as it was in this image, the but tiny nacelles only hide propeller driveshafts, its eight (piston) Bristol Centaurus engines were buried inside the wings.
You might like this, Mr Norman.
Did Australia invent the world’s best fighter jet?
https://www.youtube.com/watch?v=OjiqdSwMxT8
In this video, we’ll take you on a journey through the CA-23’s development process, showcasing its sleek design, powerful engine, and impressive capabilities that made it a force to be reckoned with in the skies. From its maiden flight to its operational history, we’ll uncover the pivotal role the CA-23 played in the Royal Australian Air Force (RAAF) and its impact on aviation enthusiasts worldwide.
esselte said:
You might like this, Mr Norman.Did Australia invent the world’s best fighter jet?
https://www.youtube.com/watch?v=OjiqdSwMxT8
In this video, we’ll take you on a journey through the CA-23’s development process, showcasing its sleek design, powerful engine, and impressive capabilities that made it a force to be reckoned with in the skies. From its maiden flight to its operational history, we’ll uncover the pivotal role the CA-23 played in the Royal Australian Air Force (RAAF) and its impact on aviation enthusiasts worldwide.
A rather odd-looking beast! I’ve not heard of that one before, I’ll check out later, thanks.
Spiny Norman said:
esselte said:
You might like this, Mr Norman.Did Australia invent the world’s best fighter jet?
https://www.youtube.com/watch?v=OjiqdSwMxT8
In this video, we’ll take you on a journey through the CA-23’s development process, showcasing its sleek design, powerful engine, and impressive capabilities that made it a force to be reckoned with in the skies. From its maiden flight to its operational history, we’ll uncover the pivotal role the CA-23 played in the Royal Australian Air Force (RAAF) and its impact on aviation enthusiasts worldwide.
A rather odd-looking beast! I’ve not heard of that one before, I’ll check out later, thanks.
Yeah. ta.
Cymek said:
roughbarked said:
Cymek said:
esselte said:
Spiny Norman said:
The First Room-Temperature Ambient-Pressure Superconductor.
(I hope!)Big if true..
I was reading that earlier, exciting if true
Well we have to see it work yet.
Yes
Don’t worry all we need to do is fuck up global warming so room temperature isn’t at its operating temperature any more and then it can fail like all the others¡
SCIENCE said:
Cymek said:
roughbarked said:
Well we have to see it work yet.
Yes
Don’t worry all we need to do is fuck up global warming so room temperature isn’t at its operating temperature any more and then it can fail like all the others¡
I’ll probably end up like Randy Meisner died Wednesday night in Los Angeles of complications from chronic obstructive pulmonary disease, the Eagles said in a statement. He was 77. Ex founding member of the Eagles.
I have COPD too.
SCIENCE said:
Cymek said:
roughbarked said:
Well we have to see it work yet.
Yes
Don’t worry all we need to do is fuck up global warming so room temperature isn’t at its operating temperature any more and then it can fail like all the others¡
It would be nice if humanity had a win and it improved life for most (some already have it sweet)
Cymek said:
SCIENCE said:
Cymek said:
Yes
Don’t worry all we need to do is fuck up global warming so room temperature isn’t at its operating temperature any more and then it can fail like all the others¡
It would be nice if humanity had a win and it improved life for most (some already have it sweet)
Sure. Who has the rights to this supposed high temperature superconductor¿
Massive eruption in Johannesburg sends cars flying.
Quite startling!!
Spiny Norman said:
Massive eruption in Johannesburg sends cars flying.Quite startling!!
Wow! That’s not something you see every day. But why are there so many vans?
Spiny Norman said:
Massive eruption in Johannesburg sends cars flying.Quite startling!!
Gosh!
esselte said:
Spiny Norman said:
Massive eruption in Johannesburg sends cars flying.Quite startling!!
Wow! That’s not something you see every day. But why are there so many vans?
Probably taxis (or similar).
Michael V said:
esselte said:
Spiny Norman said:
Massive eruption in Johannesburg sends cars flying.Quite startling!!
Wow! That’s not something you see every day. But why are there so many vans?
Probably taxis (or similar).
I wonder where this fellow ended up.
Michael V said:
esselte said:
Spiny Norman said:
Massive eruption in Johannesburg sends cars flying.Quite startling!!
Wow! That’s not something you see every day. But why are there so many vans?
Probably taxis (or similar).
https://en.wikipedia.org/wiki/Share_taxi
Michael V said:
Michael V said:
esselte said:Wow! That’s not something you see every day. But why are there so many vans?
Probably taxis (or similar).
https://en.wikipedia.org/wiki/Share_taxi
Thanks <thumbsup></thumbsup>
esselte said:
Michael V said:
esselte said:Wow! That’s not something you see every day. But why are there so many vans?
Probably taxis (or similar).
I wonder where this fellow ended up.
I think he may have been tossed onto the footpath. Difficult to tell,
esselte said:
Michael V said:
esselte said:Wow! That’s not something you see every day. But why are there so many vans?
Probably taxis (or similar).
I wonder where this fellow ended up.
Somebody appears to stand up and walk towards the footpath near that location.
If you pause the video, you can then use the comma key to go back one frame at a time, and the full stop key to go forward one frame at a time.
Michael V said:
esselte said:
Michael V said:Probably taxis (or similar).
I wonder where this fellow ended up.
Somebody appears to stand up and walk towards the footpath near that location.
If you pause the video, you can then use the comma key to go back one frame at a time, and the full stop key to go forward one frame at a time.
Yet another little utube trick I didn’t know until just now.
esselte said:
Michael V said:
Michael V said:Probably taxis (or similar).
https://en.wikipedia.org/wiki/Share_taxi
Thanks <thumbsup>
</thumbsup>
The Rev Dodgson said:
Michael V said:
esselte said:I wonder where this fellow ended up.
Somebody appears to stand up and walk towards the footpath near that location.
If you pause the video, you can then use the comma key to go back one frame at a time, and the full stop key to go forward one frame at a time.
Yet another little utube trick I didn’t know until just now.
:)
fsm said:
esselte said:
Michael V said:https://en.wikipedia.org/wiki/Share_taxi
Thanks <thumbsup>
</thumbsup>
:)
Michael V said:
fsm said:
esselte said:
Thanks <thumbsup>
</thumbsup>
:)
👍👍
Alternatively and historically, (y) for which the thumbs down was (λ).
So what caused it anyway¿
SCIENCE said:
Michael V said:
fsm said:
:)
👍👍
Alternatively and historically, (y) for which the thumbs down was (λ).
Why introduce thumbs when eyes and nose are perfectly adequate for the job?
SCIENCE said:
So what caused it anyway¿
Build up of gas.
roughbarked said:
SCIENCE said:
So what caused it anyway¿
Build up of gas.
Yeah but which gas, from what source¿
The Rev Dodgson said:
SCIENCE said:
Michael V said:
:)
👍👍
Alternatively and historically, (y) for which the thumbs down was (λ).
Why introduce thumbs when eyes and nose are perfectly adequate for the job?
Maybe those who write too much prose get prosopagnosia.
SCIENCE said:
roughbarked said:
SCIENCE said:
So what caused it anyway¿
Build up of gas.
Yeah but which gas, from what source¿
Sewer.
roughbarked said:
SCIENCE said:
roughbarked said:
Build up of gas.
Yeah but which gas, from what source¿
Sewer.
Ah.
How are these prevented in Australian cities¿ Or should we be wary of parking our van on the roads here¿
SCIENCE said:
roughbarked said:
SCIENCE said:
Yeah but which gas, from what source¿
Sewer.
Ah.
How are these prevented in Australian cities¿ Or should we be wary of parking our van on the roads here¿
The riser pipe (stink pipe) at each house vents methane from the sewage system. I don’t know whether that is the main preventative although I imagine it’s substantial.
esselte said:
Spiny Norman said:
Massive eruption in Johannesburg sends cars flying.Quite startling!!
Wow! That’s not something you see every day. But why are there so many vans?
Lot of dutch people I guess.
ChrispenEvan said:
esselte said:
Spiny Norman said:
Massive eruption in Johannesburg sends cars flying.Quite startling!!
Wow! That’s not something you see every day. But why are there so many vans?
Lot of dutch people I guess.
Do they pass on the left hand side
ChrispenEvan said:
esselte said:
Spiny Norman said:
Massive eruption in Johannesburg sends cars flying.Quite startling!!
Wow! That’s not something you see every day. But why are there so many vans?
Lot of dutch people I guess.
But they are Van Stopped, not Van Gogh.
The Rev Dodgson said:
ChrispenEvan said:
esselte said:Wow! That’s not something you see every day. But why are there so many vans?
Lot of dutch people I guess.
But they are Van Stopped, not Van Gogh.
Dear oh dear.
Peak Warming Man said:
The Rev Dodgson said:
ChrispenEvan said:Lot of dutch people I guess.
But they are Van Stopped, not Van Gogh.
Dear oh dear.
My apologies for encouraging the follow up jokes.
Peak Warming Man said:
The Rev Dodgson said:
ChrispenEvan said:Lot of dutch people I guess.
But they are Van Stopped, not Van Gogh.
Dear oh dear.
Probably because they didn’t have the Monet to make the Van Gogh.
I have a fascination and equally a horror of nuclear weapons. As many people know the Soviet Tzar Bomba was the most powerful ever tested. The scientists & engineers decided to reduce the maximum yield by about 50%, by using non-fissile materials in the 3rd stage.
Even when only exploding at half its maximum power, the stats are terrifying.
- The flare was visible at a distance of more than 1,000 km (620 mi). It was observed in Norway, Greenland and Alaska.
- The explosion’s nuclear mushroom rose to a height of 67 km (42 mi). The shape of the “hat” was two-tiered; the diameter of the upper tier was estimated at 95 km (59 mi), the lower tier at 70 km (43 mi). The cloud was observed 800 km (500 mi) from the explosion site.
- The blast wave circled the globe three times, with the first one taking 36 hours and 27 minutes.
- A seismic wave in the earth’s crust, generated by the shock wave of the explosion, circled the globe three times.
- The atmospheric pressure wave resulting from the explosion was recorded three times in New Zealand: the station in Wellington recorded an increase in pressure at 21:57, on – October 30, coming from the north-west, at 07:17 on October 31, from the southeast, and at 09:16, on November 1, from the northwest (all GMT time), with amplitudes of 0.6 mbar (0.60 hPa), 0.4 mbar (0.40 hPa), and 0.2 mbar (0.20 hPa). Respectively, the average wave speed is estimated at 303 m/s (990 ft/s), or 9.9 degrees of the great circle per hour.
- Glass shattered in windows 780 km (480 mi) from the explosion in a village on Dikson Island.
- The sound wave generated by the explosion reached Dikson Island, but there are no reports of destruction or damage to structures even in the urban-type settlement of Amderma, which is much closer (280 km (170 mi)) to the landfall.
- Ionization of the atmosphere caused interference to radio communications even hundreds of kilometers from the test site for about 40 minutes.
-Radioactive contamination of the experimental field with a radius of 2–3 km (1.2–1.9 mi) in the epicenter area was no more than 1 milliroentgen / hour. The testers appeared at the explosion site 2 hours later; radioactive contamination posed practically no danger to the test participants.
- All buildings in the village of Severny, both wooden and brick, located 55 km (34 mi) from ground zero within the Sukhoy Nos test range, were destroyed. In districts hundreds of kilometres from ground zero, wooden houses were destroyed; stone ones lost their roofs, windows, and doors; and radio communications were interrupted for almost one hour.
- One participant in the test saw a bright flash through dark goggles and felt the effects of a thermal pulse even at a distance of 270 km (170 mi). The heat from the explosion could have caused third-degree burns 100 km (62 mi) away from ground zero. A shock wave was observed in the air at Dikson settlement 700 km (430 mi) away; windowpanes were partially broken for distances up to 900 kilometres (560 mi). Atmospheric focusing caused blast damage at even greater distances, breaking windows in Norway and Finland.
- Despite being detonated 4.2 km (3 mi) above ground, its seismic body wave magnitude was estimated at 5.0–5.25.
https://en.wikipedia.org/wiki/Tsar_Bomba
There is still occasional research being done on bombs in the gigatonne range. Fortunately the intent is to destroy incoming asteroids.
(I hope)
Spiny Norman said:
I have a fascination and equally a horror of nuclear weapons. As many people know the Soviet Tzar Bomba was the most powerful ever tested. The scientists & engineers decided to reduce the maximum yield by about 50%, by using non-fissile materials in the 3rd stage.
Even when only exploding at half its maximum power, the stats are terrifying.- The flare was visible at a distance of more than 1,000 km (620 mi). It was observed in Norway, Greenland and Alaska.
- The explosion’s nuclear mushroom rose to a height of 67 km (42 mi). The shape of the “hat” was two-tiered; the diameter of the upper tier was estimated at 95 km (59 mi), the lower tier at 70 km (43 mi). The cloud was observed 800 km (500 mi) from the explosion site.
- The blast wave circled the globe three times, with the first one taking 36 hours and 27 minutes.
- A seismic wave in the earth’s crust, generated by the shock wave of the explosion, circled the globe three times.
- The atmospheric pressure wave resulting from the explosion was recorded three times in New Zealand: the station in Wellington recorded an increase in pressure at 21:57, on – October 30, coming from the north-west, at 07:17 on October 31, from the southeast, and at 09:16, on November 1, from the northwest (all GMT time), with amplitudes of 0.6 mbar (0.60 hPa), 0.4 mbar (0.40 hPa), and 0.2 mbar (0.20 hPa). Respectively, the average wave speed is estimated at 303 m/s (990 ft/s), or 9.9 degrees of the great circle per hour.
- Glass shattered in windows 780 km (480 mi) from the explosion in a village on Dikson Island.
- The sound wave generated by the explosion reached Dikson Island, but there are no reports of destruction or damage to structures even in the urban-type settlement of Amderma, which is much closer (280 km (170 mi)) to the landfall.
- Ionization of the atmosphere caused interference to radio communications even hundreds of kilometers from the test site for about 40 minutes.
-Radioactive contamination of the experimental field with a radius of 2–3 km (1.2–1.9 mi) in the epicenter area was no more than 1 milliroentgen / hour. The testers appeared at the explosion site 2 hours later; radioactive contamination posed practically no danger to the test participants.
- All buildings in the village of Severny, both wooden and brick, located 55 km (34 mi) from ground zero within the Sukhoy Nos test range, were destroyed. In districts hundreds of kilometres from ground zero, wooden houses were destroyed; stone ones lost their roofs, windows, and doors; and radio communications were interrupted for almost one hour.
- One participant in the test saw a bright flash through dark goggles and felt the effects of a thermal pulse even at a distance of 270 km (170 mi). The heat from the explosion could have caused third-degree burns 100 km (62 mi) away from ground zero. A shock wave was observed in the air at Dikson settlement 700 km (430 mi) away; windowpanes were partially broken for distances up to 900 kilometres (560 mi). Atmospheric focusing caused blast damage at even greater distances, breaking windows in Norway and Finland.
- Despite being detonated 4.2 km (3 mi) above ground, its seismic body wave magnitude was estimated at 5.0–5.25.
https://en.wikipedia.org/wiki/Tsar_Bomba
There is still occasional research being done on bombs in the gigatonne range. Fortunately the intent is to destroy incoming asteroids.
(I hope)
Probly a good thing they decided against testing the 100 megaton version.
Hyperbolic rotations of spacetime.
What is a Lorentz transformation? How do we turn within space-time? Why is the speed of light invariant? All these answers in 15 minutes!
Spiny Norman said:
Hyperbolic rotations of spacetime.What is a Lorentz transformation? How do we turn within space-time? Why is the speed of light invariant? All these answers in 15 minutes!
Thanks for that Bill, very good.
Spiny Norman said:
Hyperbolic rotations of spacetime.What is a Lorentz transformation? How do we turn within space-time? Why is the speed of light invariant? All these answers in 15 minutes!
Nice and simple. physics is weird though.
Spiny Norman said:
I have a fascination and equally a horror of nuclear weapons. As many people know the Soviet Tzar Bomba was the most powerful ever tested. The scientists & engineers decided to reduce the maximum yield by about 50%, by using non-fissile materials in the 3rd stage.
Even when only exploding at half its maximum power, the stats are terrifying.- The flare was visible at a distance of more than 1,000 km (620 mi). It was observed in Norway, Greenland and Alaska.
- The explosion’s nuclear mushroom rose to a height of 67 km (42 mi). The shape of the “hat” was two-tiered; the diameter of the upper tier was estimated at 95 km (59 mi), the lower tier at 70 km (43 mi). The cloud was observed 800 km (500 mi) from the explosion site.
- The blast wave circled the globe three times, with the first one taking 36 hours and 27 minutes.
- A seismic wave in the earth’s crust, generated by the shock wave of the explosion, circled the globe three times.
- The atmospheric pressure wave resulting from the explosion was recorded three times in New Zealand: the station in Wellington recorded an increase in pressure at 21:57, on – October 30, coming from the north-west, at 07:17 on October 31, from the southeast, and at 09:16, on November 1, from the northwest (all GMT time), with amplitudes of 0.6 mbar (0.60 hPa), 0.4 mbar (0.40 hPa), and 0.2 mbar (0.20 hPa). Respectively, the average wave speed is estimated at 303 m/s (990 ft/s), or 9.9 degrees of the great circle per hour.
- Glass shattered in windows 780 km (480 mi) from the explosion in a village on Dikson Island.
- The sound wave generated by the explosion reached Dikson Island, but there are no reports of destruction or damage to structures even in the urban-type settlement of Amderma, which is much closer (280 km (170 mi)) to the landfall.
- Ionization of the atmosphere caused interference to radio communications even hundreds of kilometers from the test site for about 40 minutes.
-Radioactive contamination of the experimental field with a radius of 2–3 km (1.2–1.9 mi) in the epicenter area was no more than 1 milliroentgen / hour. The testers appeared at the explosion site 2 hours later; radioactive contamination posed practically no danger to the test participants.
- All buildings in the village of Severny, both wooden and brick, located 55 km (34 mi) from ground zero within the Sukhoy Nos test range, were destroyed. In districts hundreds of kilometres from ground zero, wooden houses were destroyed; stone ones lost their roofs, windows, and doors; and radio communications were interrupted for almost one hour.
- One participant in the test saw a bright flash through dark goggles and felt the effects of a thermal pulse even at a distance of 270 km (170 mi). The heat from the explosion could have caused third-degree burns 100 km (62 mi) away from ground zero. A shock wave was observed in the air at Dikson settlement 700 km (430 mi) away; windowpanes were partially broken for distances up to 900 kilometres (560 mi). Atmospheric focusing caused blast damage at even greater distances, breaking windows in Norway and Finland.
- Despite being detonated 4.2 km (3 mi) above ground, its seismic body wave magnitude was estimated at 5.0–5.25.
https://en.wikipedia.org/wiki/Tsar_Bomba
There is still occasional research being done on bombs in the gigatonne range. Fortunately the intent is to destroy incoming asteroids.
(I hope)
They didn’t say how many dogs started barking their heads off, 1000km away.
roughbarked said:
They didn’t say how many dogs started barking their heads off, 1000km away.
Or how many china ducks fell of how many lounge room walls.
captain_spalding said:
roughbarked said:They didn’t say how many dogs started barking their heads off, 1000km away.
Or how many china ducks fell of how many lounge room walls.
:)
Venezuelan Navy Attacks Cruise Ship, Loses.
Has the US been flying black triangle UFOs since DESERT STORM?!
Spiny Norman said:
Has the US been flying black triangle UFOs since DESERT STORM?!
TR-3 Black Manta?
Been stories about that since at least the mid-1980s.
This tank hops on one leg.
Spiny Norman said:
This tank hops on one leg.
You’re going to be expecting some SERIOUS hazard pay for serving in that thing.
captain_spalding said:
Spiny Norman said:
This tank hops on one leg.You’re going to be expecting some SERIOUS hazard pay for serving in that thing.
Oh aren’t you the optimist – You’re assuming that anyone in it will survive.
Spiny Norman said:
captain_spalding said:
Spiny Norman said:
This tank hops on one leg.You’re going to be expecting some SERIOUS hazard pay for serving in that thing.
Oh aren’t you the optimist – You’re assuming that anyone in it will survive.
You might survive if you dressed like this:
captain_spalding said:
Spiny Norman said:
captain_spalding said:You’re going to be expecting some SERIOUS hazard pay for serving in that thing.
Oh aren’t you the optimist – You’re assuming that anyone in it will survive.
You might survive if you dressed like this:
Bibendum apparel, quite appropriate indeed.
Spiny Norman said:
captain_spalding said:
Spiny Norman said:Oh aren’t you the optimist – You’re assuming that anyone in it will survive.
You might survive if you dressed like this:
Bibendum apparel, quite appropriate indeed.
Of course, it’d be asking rather a lot of the crew to perform feats of co-ordination and marksmanship after a series of accelerations and decelerations like that. I note that none of the diagrams of the interior include the vast amount of sick which would be coating the compartment.
This Tube Makes Water Flow By Itself
The Crazy Quantum Mechanical Picture of How Light Slows Down in Glass.
Spiny Norman said:
The Crazy Quantum Mechanical Picture of How Light Slows Down in Glass.
https://www.youtube.com/watch?v=CiHN0ZWE5bk
Why is light slower in glass? – Sixty Symbols
Professor Merrifield largely “uncut” discussing refraction
always enjoy this guy.
Why The Average Human Couldn’t Drive An F1 Car
Nuclear Bomb Testing at Maralinga
Spiny Norman said:
Nuclear Bomb Testing at Maralinga
:(
The lesser known history of the Maralinga nuclear tests — and what it’s like to stand at ground zero
https://www.abc.net.au/news/2020-03-24/maralinga-nuclear-tests-ground-zero-lesser-known-history/11882608
Spiny Norman said:
Nuclear Bomb Testing at Maralinga
an informative read about the fallout.
https://www.amazon.com.au/Fallout-Hedley-Marston-British-Australia-ebook/dp/B007F3TBCS
Bogsnorkler said:
Spiny Norman said:
Nuclear Bomb Testing at Maralingaan informative read about the fallout.
https://www.amazon.com.au/Fallout-Hedley-Marston-British-Australia-ebook/dp/B007F3TBCS
If you want a dramatized version…Operation Buffalo. Was shown on ABC a few years ago.
buffy said:
Bogsnorkler said:
Spiny Norman said:
Nuclear Bomb Testing at Maralingaan informative read about the fallout.
https://www.amazon.com.au/Fallout-Hedley-Marston-British-Australia-ebook/dp/B007F3TBCS
If you want a dramatized version…Operation Buffalo. Was shown on ABC a few years ago.
As some of you know, I had an elder sister who died of leukemia in 1961 at the age of 3 years. There were a number of cases in Melbourne of childhood leukemia in children born around the time of the Maralinga tests. My mother always maintained that it was somehow linked to fallout drift. I don’t know if there really was a cluster or if anyone has looked at the stats over the years.
https://www.abc.net.au/news/2023-08-07/is-red-meat-bad-for-you-processed-burger-steak/102698070
Two questions posed at the start of the article and in the Justin teaser. Only one was answered in the article. ABC have been doing this a bit lately. Grrr.
“But is eating a beef burger worse for your health than eating a lean grass-fed steak?
And how much red meat should we really be eating?”
Sorry. Should’ve been in chat.
Remarkable detail in the cooling fins on a piston from a Pratt & Whitney R2800 radial engine. Since they were air-cooled the oil had to help more than it otherwise would in a water-cooled engine by being sprayed around inside the engine to soak up some of the heat.
Las Vegas $2.3BN Mega Sphere.
Timeline of the far future.
While the future cannot be predicted with certainty, present understanding in various scientific fields allows for the prediction of some far-future events, if only in the broadest outline. These fields include astrophysics, which studies how planets and stars form, interact, and die; particle physics, which has revealed how matter behaves at the smallest scales; evolutionary biology, which studies how life evolves over time; plate tectonics, which shows how continents shift over millennia; and sociology, which examines how human societies and cultures evolve.
These timelines begin at the start of the 4th millennium in 3001 CE, and continue until the furthest reaches of future time. They include alternative future events that address unresolved scientific questions, such as whether humans will become extinct, whether the Earth survives when the Sun expands to become a red giant and whether proton decay will be the eventual end of all matter in the Universe.
https://en.wikipedia.org/wiki/Timeline_of_the_far_future#Spacecraft_and_space_exploration
This is the last photo taken from the surface of Venus, 40 years ago. The Venera-14 lander reached the surface in 1982, lasting 52 minutes in Venus’ temperature of 450°C.
Spiny Norman said:
This is the last photo taken from the surface of Venus, 40 years ago. The Venera-14 lander reached the surface in 1982, lasting 52 minutes in Venus’ temperature of 450°C.
More than forty years.
All being well, DAVINCI will land in 2031.
Looks like basalt.
dv said:
Spiny Norman said:
This is the last photo taken from the surface of Venus, 40 years ago. The Venera-14 lander reached the surface in 1982, lasting 52 minutes in Venus’ temperature of 450°C.
More than forty years.
All being well, DAVINCI will land in 2031.
Looks like basalt.
Baked basalt.
Spiny Norman said:
This is the last photo taken from the surface of Venus, 40 years ago. The Venera-14 lander reached the surface in 1982, lasting 52 minutes in Venus’ temperature of 450°C.
Huh! A pretty good image, considering.
Using A4 paper style as a ruler for the very very small to the very ver large.
Spiny Norman said:
Using A4 paper style as a ruler for the very very small to the very ver large.
OK, so powers of 10, but with three times as many steps.
But very well done, although some of the commentary at very small and large scale was stretching things a bit.
Or should that be shrinking?
Bailong Elevator, also known as the Hundred Dragons Elevator, is a glass elevator located in the Wulingyuan area of Zhangjiajie, China. It is considered to be the world’s tallest outdoor elevator, standing at a height of 326 meters (1,070 feet).
The elevator was built into the side of a cliff in the UNESCO World Heritage site of Zhangjiajie National Forest Park, and it takes visitors up to the top of the cliff where they can enjoy panoramic views of the surrounding landscape.
Construction of the Bailong Elevator began in 1999 and was completed in 2002. The elevator has three double-decker cars, each of which can carry up to 50 passengers. It is powered by a system of three powerful motors and is capable of lifting passengers at a speed of 3 meters per second.
The Bailong Elevator is a popular tourist attraction and is visited by thousands of people each year. However, its construction and location have also been controversial due to concerns about its impact on the natural environment and the safety of passengers.
New evidence suggests the world’s largest known asteroid impact structure is buried deep in southeast Australia.
The Deniliquin structure, yet to be further tested by drilling, spans up to 520 kilometres in diameter. This exceeds the size of the near-300km-wide Vredefort impact structure in South Africa, which to date has been considered the world’s largest.
UK aerospace company Pulsar Fusion has started constructing the largest practical nuclear fusion rocket engine ever built.
The 8-metre fusion chamber is being assembled in Bletchley, England and when fired in 2027, will temporarily become the hottest place in the solar system creating exhaust speeds of over 500,000 MPH.
Researchers at Pulsar Fusion hope to reach several hundred- million degrees when the final plasma shot is fired in the chamber, creating temperatures hotter than the Sun.
Dr James Lambert, CFO of Pulsar Fusion said: “The difficulty is learning how to hold and confine the super-hot plasma within an electromagnetic field.
“The plasma behaves like a weather system in terms of being incredibly hard to predict using conventional techniques.
“Scientists have not been able to control the turbulent plasma as it is heated to hundreds of millions of degrees and the reaction simply stops.
“This unpredictability is attributed to the science Magneto-Hydro Dynamics (MHD) and Gyrokinetics, the state of the plasma is changing all the time.
https://www.spacedaily.com/reports/A_space_rocket_hotter_than_the_Sun_999.html
F1 Tyrrell P34 style four wheel steering made a tiny racing comeback this week with this entry into the 10hr K4GP at Fuji. This is a Kei Car so those are kart wheels and kart brakes at the front.
Spiny Norman said:
F1 Tyrrell P34 style four wheel steering made a tiny racing comeback this week with this entry into the 10hr K4GP at Fuji. This is a Kei Car so those are kart wheels and kart brakes at the front.
Check this out Mr Spiny.
0–100 km/h in 1.82 s, 402 m (1⁄4 mi) in 8.25 s, and 0–400–0 km/h in 29.93 s.
https://en.wikipedia.org/wiki/Rimac_Nevera
The Rimac Nevera is an all-electric sports car designed and manufactured by the Croatian automotive manufacturer Rimac Automobili.
The first production spec Nevera was delivered to 2016 Formula One World Champion Nico Rosberg in August 2022. By June 2023, Rimac had delivered two more production cars to collectors in the United States. The Nevera is manufactured in the same factory and at the same rate (of roughly 1 per week) as the Pininfarina Battista, which is based on the same platform.
Each of the Nevera’s four wheels is individually driven by surface-mounted magnet motors. Combined, they produce a total of 1,427 kW (1,914 hp) and 2,360 N⋅m (1,741 lbf⋅ft) of torque. Each set of wheels, front and rear, has a single-speed gearbox to allow full torque to be applied left or right of that axle.
On 15 November 2022, Rimac released two videos showing the car reaching 412 km/h (256 mph) on the Automotive Testing Papenburg track in Germany, leading to media outlets calling it the “fastest electric car in the world”.
On July 17, 2023, it set the record for the fastest production EV car at the Goodwood Festival of Speed, clocking at 49.32 seconds.
esselte said:
Spiny Norman said:
F1 Tyrrell P34 style four wheel steering made a tiny racing comeback this week with this entry into the 10hr K4GP at Fuji. This is a Kei Car so those are kart wheels and kart brakes at the front.
Check this out Mr Spiny.
0–100 km/h in 1.82 s, 402 m (1⁄4 mi) in 8.25 s, and 0–400–0 km/h in 29.93 s.
https://en.wikipedia.org/wiki/Rimac_Nevera
The Rimac Nevera is an all-electric sports car designed and manufactured by the Croatian automotive manufacturer Rimac Automobili.
The first production spec Nevera was delivered to 2016 Formula One World Champion Nico Rosberg in August 2022. By June 2023, Rimac had delivered two more production cars to collectors in the United States. The Nevera is manufactured in the same factory and at the same rate (of roughly 1 per week) as the Pininfarina Battista, which is based on the same platform.
Each of the Nevera’s four wheels is individually driven by surface-mounted magnet motors. Combined, they produce a total of 1,427 kW (1,914 hp) and 2,360 N⋅m (1,741 lbf⋅ft) of torque. Each set of wheels, front and rear, has a single-speed gearbox to allow full torque to be applied left or right of that axle.
On 15 November 2022, Rimac released two videos showing the car reaching 412 km/h (256 mph) on the Automotive Testing Papenburg track in Germany, leading to media outlets calling it the “fastest electric car in the world”.
On July 17, 2023, it set the record for the fastest production EV car at the Goodwood Festival of Speed, clocking at 49.32 seconds.
They are indeed a scorchingly fast car.
Here’s how fast they are, it’s quite astounding.
Iran has a reputation for ingenious aero developments, despite being under embargo from most Western States. However, this ejection seat test aircraft seems a small case of ‘overkill’!
Spiny Norman said:
Iran has a reputation for ingenious aero developments, despite being under embargo from most Western States. However, this ejection seat test aircraft seems a small case of ‘overkill’!
Presumably cost less in lost aircraft?
The circle dot trick.
https://www.ncbi.nlm.nih.gov/books/NBK576388/
Negative Pressure Wound Therapy
Negative pressure wound therapy (NPWT) aims to optimize the physiology involved in wound healing by applying sub-atmospheric pressure to help reduce inflammatory exudate and promote granulation tissue. It is primarily utilized to treat complex wounds which are non-healing or at risk of non-healing, such as diabetic foot ulcers or skin grafts. All medical personnel can implement NPWT; however, specific training and a sufficient level of expertise must be obtained prior to application. This activity outlines the background information and practical application of NPWT and explains the role of the healthcare team in managing patients who undergo NPWT.
21 August 1961. First civilian jet to make a supersonic flight was a Douglas DC-8, DC-8-43/N9604Z s/n 45623, at Mach 1.012 (660 mph) while in a controlled dive through 41,000 ft. It maintained that speed for 16 seconds to collect data on a new leading-edge design for the wing.
Spiny Norman said:
21 August 1961. First civilian jet to make a supersonic flight was a Douglas DC-8, DC-8-43/N9604Z s/n 45623, at Mach 1.012 (660 mph) while in a controlled dive through 41,000 ft. It maintained that speed for 16 seconds to collect data on a new leading-edge design for the wing.
Tamb said:
Spiny Norman said:
21 August 1961. First civilian jet to make a supersonic flight was a Douglas DC-8, DC-8-43/N9604Z s/n 45623, at Mach 1.012 (660 mph) while in a controlled dive through 41,000 ft. It maintained that speed for 16 seconds to collect data on a new leading-edge design for the wing.
The chase plane looks like Lockheed XF-104 Starfighter.
Yep, it is.
Spiny Norman said:
Tamb said:
Spiny Norman said:
21 August 1961. First civilian jet to make a supersonic flight was a Douglas DC-8, DC-8-43/N9604Z s/n 45623, at Mach 1.012 (660 mph) while in a controlled dive through 41,000 ft. It maintained that speed for 16 seconds to collect data on a new leading-edge design for the wing.
The chase plane looks like Lockheed XF-104 Starfighter.Yep, it is.
It’s F-104A-10-LO Ser. No 56-0748
History:
Delivered to United States Air Force as 54-0748.
BOC: June 29, 1957.
SOC: December 1972.
Assigned to Air Force Flight Test Center, Edwards AFB, CA.
Dyess Linear Air Park, Dyess AFB, TX, 19??-2021
It spent its entire service life assigned to the Air Force Flight Test Center, Edwards AFB, California. It retired from service in December 1972.
Here it is at Edwards Air Force Base in 1967:
Here it is, in its present role as a ‘gate guard’ at Dyess Air Force Base. Abilene, Texas.
captain_spalding said:
Spiny Norman said:
Tamb said:The chase plane looks like Lockheed XF-104 Starfighter.
Yep, it is.
It’s F-104A-10-LO Ser. No 56-0748
History:
Delivered to United States Air Force as 54-0748.
BOC: June 29, 1957.
SOC: December 1972.
Assigned to Air Force Flight Test Center, Edwards AFB, CA.
Dyess Linear Air Park, Dyess AFB, TX, 19??-2021It spent its entire service life assigned to the Air Force Flight Test Center, Edwards AFB, California. It retired from service in December 1972.
Here it is at Edwards Air Force Base in 1967:
Here it is, in its present role as a ‘gate guard’ at Dyess Air Force Base. Abilene, Texas.
captain_spalding said:
Spiny Norman said:
Tamb said:The chase plane looks like Lockheed XF-104 Starfighter.
Yep, it is.
It’s F-104A-10-LO Ser. No 56-0748
History:
Delivered to United States Air Force as 54-0748.
BOC: June 29, 1957.
SOC: December 1972.
Assigned to Air Force Flight Test Center, Edwards AFB, CA.
Dyess Linear Air Park, Dyess AFB, TX, 19??-2021It spent its entire service life assigned to the Air Force Flight Test Center, Edwards AFB, California. It retired from service in December 1972.
Here it is at Edwards Air Force Base in 1967:
Here it is, in its present role as a ‘gate guard’ at Dyess Air Force Base. Abilene, Texas.
Bottom one different serial number.
captain_spalding said:
Spiny Norman said:
Tamb said:The chase plane looks like Lockheed XF-104 Starfighter.
Yep, it is.
It’s F-104A-10-LO Ser. No 56-0748
History:
Delivered to United States Air Force as 54-0748.
BOC: June 29, 1957.
SOC: December 1972.
Assigned to Air Force Flight Test Center, Edwards AFB, CA.
Dyess Linear Air Park, Dyess AFB, TX, 19??-2021It spent its entire service life assigned to the Air Force Flight Test Center, Edwards AFB, California. It retired from service in December 1972.
Here it is at Edwards Air Force Base in 1967:
Here it is, in its present role as a ‘gate guard’ at Dyess Air Force Base. Abilene, Texas.
They are incredibly dangerous to fly.
I want one.
I’ve been watching a lot of the Beirut explosion videos, something like 300,000 people lost their home in that horrific accident.
Spiny Norman said:
I’ve been watching a lot of the Beirut explosion videos, something like 300,000 people lost their home in that horrific accident.
Fkn LNP and their failure to avert the housing crisis!
Spiny Norman said:
captain_spalding said:
Spiny Norman said:Yep, it is.
It’s F-104A-10-LO Ser. No 56-0748
History:
Delivered to United States Air Force as 54-0748.
BOC: June 29, 1957.
SOC: December 1972.
Assigned to Air Force Flight Test Center, Edwards AFB, CA.
Dyess Linear Air Park, Dyess AFB, TX, 19??-2021It spent its entire service life assigned to the Air Force Flight Test Center, Edwards AFB, California. It retired from service in December 1972.
Here it is at Edwards Air Force Base in 1967:
Here it is, in its present role as a ‘gate guard’ at Dyess Air Force Base. Abilene, Texas.
They are incredibly dangerous to fly.
I want one.
There was bloke in America who actually built one himself.
Spiny Norman said:
captain_spalding said:
Spiny Norman said:Yep, it is.
It’s F-104A-10-LO Ser. No 56-0748
History:
Delivered to United States Air Force as 54-0748.
BOC: June 29, 1957.
SOC: December 1972.
Assigned to Air Force Flight Test Center, Edwards AFB, CA.
Dyess Linear Air Park, Dyess AFB, TX, 19??-2021It spent its entire service life assigned to the Air Force Flight Test Center, Edwards AFB, California. It retired from service in December 1972.
Here it is at Edwards Air Force Base in 1967:
Here it is, in its present role as a ‘gate guard’ at Dyess Air Force Base. Abilene, Texas.
They are incredibly dangerous to fly.
I want one.
I sat in one in Germany in 1965.
Bogsnorkler said:
captain_spalding said:
Spiny Norman said:Yep, it is.
It’s F-104A-10-LO Ser. No 56-0748
History:
Delivered to United States Air Force as 54-0748.
BOC: June 29, 1957.
SOC: December 1972.
Assigned to Air Force Flight Test Center, Edwards AFB, CA.
Dyess Linear Air Park, Dyess AFB, TX, 19??-2021It spent its entire service life assigned to the Air Force Flight Test Center, Edwards AFB, California. It retired from service in December 1972.
Here it is at Edwards Air Force Base in 1967:
Here it is, in its present role as a ‘gate guard’ at Dyess Air Force Base. Abilene, Texas.
Bottom one different serial number.
USAF numbers can vary a bit, from time to time, but they tend to follow a pattern laid down after WW2.
The first digit, or may be the first two digits, depending on the fashion of the day, represent the year of the decade in which the aircraft was budgeted for.
So, this F-104 started off with a 54- number. Sometimes things get reviewed, and the aircraft may get renumbered according to either the year in which they were manufactured (so this plane had a 55- number for a while), or according to the year in which they were became part of the USAF (which is why it also had a 56- number at some stages). Even thought it wasn’t actually ‘brought on charge’ until 1957.
In the pic with the DC-8, it’s 60748, which (given that it’s early 1960s in the pic, and this is how they were doing it then, and everyone knew that F-104s originated in the 1950s) signifies that it’s aircraft 0748 from 1956.
SCIENCE said:
Spiny Norman said:
I’ve been watching a lot of the Beirut explosion videos, something like 300,000 people lost their home in that horrific accident.
Fkn LNP and their failure to avert the housing crisis!
https://www.abc.net.au/news/2023-08-21/nsw-sydney-waterloo-development-plans-change-minns/102754454
I quite enjoy watching the clever mechanisms used in aircraft landing gear. The task of getting large landing gear into the smallest possible space has created many varied ways of doing so.
Oops …
Touched down just a wee bit too hard on the left main landing gear – You can see that it’s pushed up far enough to stick out of the top of the wing.
Spiny Norman said:
Oops …
Touched down just a wee bit too hard on the left main landing gear – You can see that it’s pushed up far enough to stick out of the top of the wing.
Do pilots get fined/reprimanded for such things if its pilot error
Cymek said:
Spiny Norman said:
Oops …
Touched down just a wee bit too hard on the left main landing gear – You can see that it’s pushed up far enough to stick out of the top of the wing.
Do pilots get fined/reprimanded for such things if its pilot error
No, not at all.
They would likely get invited the chief pilot’s office, then either get promoted so they can’t do that again or get fired on the spot.
In reality maybe a demotion back to being a first officer for a year, or have to undergo re-training.
Or just fired.
Spiny Norman said:
Oops …
Touched down just a wee bit too hard on the left main landing gear – You can see that it’s pushed up far enough to stick out of the top of the wing.
that’ll buff right out
Arts said:
Spiny Norman said:
Oops …
Touched down just a wee bit too hard on the left main landing gear – You can see that it’s pushed up far enough to stick out of the top of the wing.
that’ll buff right out
It’s almost certain to be a write-off unfortunately.
But hey, the bottom of the engine is very thoroughly buffed.
NASA has now confirmed the existence of 5,496 exoplanets in 4,096 different planetary systems.
Spiny Norman said:
NASA has now confirmed the existence of 5,496 exoplanets in 4,096 different planetary systems.
I see our place is one of the smallest.
roughbarked said:
Spiny Norman said:
NASA has now confirmed the existence of 5,496 exoplanets in 4,096 different planetary systems.
I see our place is one of the smallest.
None like ours either
roughbarked said:
Spiny Norman said:
NASA has now confirmed the existence of 5,496 exoplanets in 4,096 different planetary systems.
I see our place is one of the smallest.
Couldn’t find it.
But anyway, planets smaller than Earth that are 100’s of light years away are very hard to detect.
Doesn’t mean they aren’t there.
Spiny Norman said:
NASA has now confirmed the existence of 5,496 exoplanets in 4,096 different planetary systems.
Nice round number.
From a binary perspective.
t-55 hull with two MiG-21 engines on the turret. Used for making enough wind to blow out oil well fires.
Ian said:
t-55 hull with two MiG-21 engines on the turret. Used for making enough wind to blow out oil well fires.
It’s heavy enough to not blow over ?
Cymek said:
Ian said:
t-55 hull with two MiG-21 engines on the turret. Used for making enough wind to blow out oil well fires.
It’s heavy enough to not blow over ?
Apparently not
My GIANT SPANNER is almost complete!
Why is the Speed of Light Slower in Water and Glass?
Spiny Norman said:
Why is the Speed of Light Slower in Water and Glass?
dunno, will watch but is it diffraction?
Spiny Norman said:
My GIANT SPANNER is almost complete!
He’ll need a big ractor to wield it with?
Spiny Norman said:
My GIANT SPANNER is almost complete!
There was a spanner of considerable size (not as big as that one, maybe 2/3 that size) at the boatyard where my mates worked.
It’s main use was removing and applying the large nuts which secured the prop shaft glands on large boats.
That Time Cessna Made a Helicopter
In the 1950s, Cessna acquired Seibel Helicopter Co. and began work on the CH-1 Skyhook.
https://www.flyingmag.com/that-time-cessna-made-a-helicopter
Trapping a Beam of Light In a Loop Of Fiber Optic Cable.
The largest impact crater on Earth is in Australia.
Gosh!
“On 26 September 1987, Mihai Smighelschi, a 21-year-old student of the Romanian Air Force Academy, flew an L-39ZA Albatros trainer to Turkey and requested political asylum.
His aircraft was later recovered and onboard data recorders showed that he had flown no higher than 150 m (490 ft) above ground at 700 km/h (430 mph) to evade radar detection. Smighelschi had less than 100 hours at the time, including high-school glider training, and less than 3 hours on the L-39ZA.
Without satellite navigation or any maps, he had navigated a straight line over Romania, Bulgaria and Turkey using only ground marks and the memory of a map of Europe present at the Academy. He eventually landed in Kirklareli, Turkey, on a street near several jeeps that seemed to have American insignia, damaging the aircraft’s front wheel and the nose.”
https://en.wikipedia.org/wiki/Aero_L-39_Albatros#Notable_accidents_and_incidents
Michael V said:
Gosh!“On 26 September 1987, Mihai Smighelschi, a 21-year-old student of the Romanian Air Force Academy, flew an L-39ZA Albatros trainer to Turkey and requested political asylum.
His aircraft was later recovered and onboard data recorders showed that he had flown no higher than 150 m (490 ft) above ground at 700 km/h (430 mph) to evade radar detection. Smighelschi had less than 100 hours at the time, including high-school glider training, and less than 3 hours on the L-39ZA.
Without satellite navigation or any maps, he had navigated a straight line over Romania, Bulgaria and Turkey using only ground marks and the memory of a map of Europe present at the Academy. He eventually landed in Kirklareli, Turkey, on a street near several jeeps that seemed to have American insignia, damaging the aircraft’s front wheel and the nose.”
https://en.wikipedia.org/wiki/Aero_L-39_Albatros#Notable_accidents_and_incidents
That is indeed quite a remarkable effort.
Spiny Norman said:
The largest impact crater on Earth is in Australia.
Grrr! AI-generated voice-over.
Gives me the irrits after a very short time.
The remainder of the video is fascinating, though.
Spiny Norman said:
The largest impact crater on Earth is in Australia.
Yes and I live in part of it.
My favourite spacecraft, the old Project Orion.
Spiny Norman said:
My favourite spacecraft, the old Project Orion.
Those were the days.
It was gonna be nuclear EVERYTHING!
Building a swimming pool? Set off a mini-A-bomb in your backyard, save all that tiresome digging.
Microwave ovens? Old hat! In this house, when we ‘nuke’ something, we REALLY nuke something!
No more jet engines, it’s nuclear engines for us (travellers’ tip: try to book a seat forward of the engine exhausts).
Paraffin Paradox.
Why is the wax block white on top and dark on the bottom?
I’m impressed, he did very well with it.
Spiny Norman said:
I’m impressed, he did very well with it.
If true it is very impressive.
The Golf Ball Paradox.
Sometimes a golf ball with pop back out of the hole. The physics behind it is quite surprising. Watch it happening in slow motion.
The cheap Chinese bulb that won’t turn off.
These LED bulbs will continue to draw power from the mains indefinitely even once they’re switched off and the circuit is broken. But how?!
Spiny Norman said:
The cheap Chinese bulb that won’t turn off.These LED bulbs will continue to draw power from the mains indefinitely even once they’re switched off and the circuit is broken. But how?!
Might be why some of my LED bulbs continue to glow (dimly) when they’re turned off.
Spiny Norman said:
The cheap Chinese bulb that won’t turn off.These LED bulbs will continue to draw power from the mains indefinitely even once they’re switched off and the circuit is broken. But how?!
have to power the microphone somehow, right?
Spiny Norman said:
The Golf Ball Paradox.
Sometimes a golf ball with pop back out of the hole. The physics behind it is quite surprising. Watch it happening in slow motion.
As it’s Friday I’m allowed to point out that:
1) A surprising physical phenomenon is not a “paradox”.
2) A centrifugal force is only imaginary if the object is actually travelling in a straight line. Any object travelling around a curved path has a real inward force and a real outward reaction force, and the latter is often called a centrifugal force.
Other than that, QI :)
The Rev Dodgson said:
Spiny Norman said:
The Golf Ball Paradox.
Sometimes a golf ball with pop back out of the hole. The physics behind it is quite surprising. Watch it happening in slow motion.As it’s Friday I’m allowed to point out that:
1) A surprising physical phenomenon is not a “paradox”.
2) A centrifugal force is only imaginary if the object is actually travelling in a straight line. Any object travelling around a curved path has a real inward force and a real outward reaction force, and the latter is often called a centrifugal force.
Other than that, QI :)
:)
Yes, QI.
The strange, secretive world of North Korean science fiction.
A plane is flying to the Philippines, gliding above “the infinite surface” of the Pacific Ocean. Suddenly, a few passengers start to scream. Soon, the captain announces there’s a bomb on board, and it’s set to detonate if the aircraft drops below 10,000 feet.
“The inside of the plane turned into a battlefield,” the story reads. “The captain was visibly startled and vainly tried to calm down the screaming and utterly terrorized passengers.”
Only one person keeps his cool: a young North Korean diplomat who has faith that his country will find a solution and save everyone. And he’s right. North Korea’s esteemed scientists and engineers create a mysterious anti-gravitational field and stop the plane in mid-air. The bomb is defused, and everyone gets off the aircraft and is brought back safely to Earth.
This story, Change Course (Hangno rǔl pakkura) by Yi Kŭmchǒl, speaks about solidarity, peace, and love for the motherland, displaying an intricate relationship between literature and politics. It was first published in 2004 in the Chosǒn munhak magazine, only to be reprinted 13 years later, around the time North Korea claimed it was capable of launching attacks on US soil.
https://arstechnica.com/culture/2023/08/the-strange-secretive-world-of-north-korean-science-fiction
Spiny Norman said:
Purdy!
Spiny Norman said:
Fabulous image.
The 300 Million Yen Robbery Was Stupidly Perfect | Tales From the Bottle
“On the morning of December 10, 1968, four Kokubunji branch employees of the Nihon Shintaku Ginko (Nippon Trust Bank) were transporting 294,307,500 yen (about US$817,520 at 1968 exchange rates) in the trunk of a Nissan Cedric company car. The metal boxes contained bonuses for the employees of Toshiba’s Fuchu factory.
A young man in the uniform of a motorcycle police officer blocked the path of the car, a mere 200 meters from its destination, in a street next to Tokyo Fuchū Prison. The bogus police officer informed the bank employees that their bank branch manager’s house had been destroyed by an explosion, and a warning had been received that an explosive device had been planted in the car. After the four employees exited the vehicle, the police officer crawled under the car. Moments later, he rolled out, shouting that the car was about to explode, and smoke and flames appeared underneath it. As the employees retreated from the vehicle, the police officer got into it and drove away.”
Spiny Norman said:
Is that one of Saturn’s moons in the foreground?
Witty Rejoinder said:
Spiny Norman said:
Is that one of Saturn’s moons in the foreground?
yes, Phobos.
Witty Rejoinder said:
Spiny Norman said:Looks like ours. Proportions are pretty correct also.Is that one of Saturn’s moons in the foreground?
Bogsnorkler said:
Witty Rejoinder said:
Spiny Norman said:
Is that one of Saturn’s moons in the foreground?
yes, Phobos.
Thanks.
Bogsnorkler said:
Witty Rejoinder said:I’m a doctor, not an astrologer.Spiny Norman said:yes, Phobos.Is that one of Saturn’s moons in the foreground?
OCDC said:
Bogsnorkler said:Witty Rejoinder said:I’m a doctor, not an astrologer.Is that one of Saturn’s moons in the foreground?yes, Phobos.
I’m a story teller. I tell stories. the more wrong the better.
Witty Rejoinder said:
Spiny Norman said:
Is that one of Saturn’s moons in the foreground?
it is our Moon. Phobos is a moon of Mars.
OCDC said:
Witty Rejoinder said:Spiny Norman said:Looks like ours. Proportions are pretty correct also.Is that one of Saturn’s moons in the foreground?
Witty Rejoinder said:
OCDC said:
Witty Rejoinder said:Is that one of Saturn’s moons in the foreground?Looks like ours. Proportions are pretty correct also.
I’m sure a similar image could be taken with our moon but I don’t think there would be any telescope of suitable power orbiting the Moon in such proximity.
What would I know anyway?
OCDC said:
Bogsnorkler said:Witty Rejoinder said:I’m a doctor, not an astrologer.Is that one of Saturn’s moons in the foreground?yes, Phobos.
I think you might have been an astronomer if you had chosen that path.
Witty Rejoinder said:
OCDC said:
Witty Rejoinder said:Is that one of Saturn’s moons in the foreground?Looks like ours. Proportions are pretty correct also.
I’m sure a similar image could be taken with our moon but I don’t think there would be any telescope of suitable power orbiting the Moon in such proximity.
That image would be entirely possible with an Earth based telescope. The image is no doubt cropped.
Bogsnorkler said:
Witty Rejoinder said:
OCDC said:
Looks like ours. Proportions are pretty correct also.
I’m sure a similar image could be taken with our moon but I don’t think there would be any telescope of suitable power orbiting the Moon in such proximity.That image would be entirely possible with an Earth based telescope. The image is no doubt cropped.
Yeah.
Witty Rejoinder said:
OCDC said:You can get this view from simple earth-based telescopes.Witty Rejoinder said:I’m sure a similar image could be taken with our moon but I don’t think there would be any telescope of suitable power orbiting the Moon in such proximity.Is that one of Saturn’s moons in the foreground?Looks like ours. Proportions are pretty correct also.
Bogsnorkler said:
Witty Rejoinder said:
OCDC said:
Looks like ours. Proportions are pretty correct also.
I’m sure a similar image could be taken with our moon but I don’t think there would be any telescope of suitable power orbiting the Moon in such proximity.That image would be entirely possible with an Earth based telescope. The image is no doubt cropped.
https://mymodernmet.com/saturn-moon-occultation/
Spiny Norman said:
The 300 Million Yen Robbery Was Stupidly Perfect | Tales From the Bottle“On the morning of December 10, 1968, four Kokubunji branch employees of the Nihon Shintaku Ginko (Nippon Trust Bank) were transporting 294,307,500 yen (about US$817,520 at 1968 exchange rates) in the trunk of a Nissan Cedric company car. The metal boxes contained bonuses for the employees of Toshiba’s Fuchu factory.
A young man in the uniform of a motorcycle police officer blocked the path of the car, a mere 200 meters from its destination, in a street next to Tokyo Fuchū Prison. The bogus police officer informed the bank employees that their bank branch manager’s house had been destroyed by an explosion, and a warning had been received that an explosive device had been planted in the car. After the four employees exited the vehicle, the police officer crawled under the car. Moments later, he rolled out, shouting that the car was about to explode, and smoke and flames appeared underneath it. As the employees retreated from the vehicle, the police officer got into it and drove away.”
At the end of WW2, the Allies discovered a cache of gold bars in occupied Germany.
It amounted to several tons (a cube of gold weighing one tonne is only 37 cm on each side).
To move it to safe storage required a convoy of several US Army trucks. The trucks were allocated, arrived, and were loaded, precisely as ordered. They then drove off.
None of the trucks, drivers, or gold has been seen since. I understand that Switzerland was not all that far away.
Israel’s Hydrogen Breakthrough: Producing Hydrogen with the Help of Nature.
In a groundbreaking development, researchers from Tel Aviv University in Israel have taken a significant step forward by producing “green” hydrogen at an astonishing 90% efficiency level. Now although this might be a little less that Hysata 90% is still crazy high and super impressive.
Did Samuel Beckett Drive a Young André the Giant to School?
A legend about the iconic wrestler has a significant grain of truth to it but has been embellished over the years.
https://www.snopes.com/fact-check/andre-the-giant-samuel-beckett/
Spiny Norman said:
Did Samuel Beckett Drive a Young André the Giant to School?
A legend about the iconic wrestler has a significant grain of truth to it but has been embellished over the years.https://www.snopes.com/fact-check/andre-the-giant-samuel-beckett/
interesting
The Insane Biology Of The Volcano Snail.
Spiny Norman said:
The Insane Biology Of The Volcano Snail.
They have a unique look
Two Bell 214 helicopter just returning from firefighting out south of Cecil Plains.
captain_spalding said:
Two Bell 214 helicopter just returning from firefighting out south of Cecil Plains.
Those snails do indeed look different, but I think that’s a bit of a stretch sorry.
Spiny Norman said:
captain_spalding said:
Two Bell 214 helicopter just returning from firefighting out south of Cecil Plains.
Those snails do indeed look different, but I think that’s a bit of a stretch sorry.
Sorry should have been in Chat.
The new game graphics engine, Unreal Engine 5.3 is extremely impressive indeed.
https://www.youtube.com/watch?v=POwTaVZ_CA0
And it’s free to download as well.
Mariana Trench: Deepest-ever sub dive finds plastic bag.
An American explorer has found plastic waste on the seafloor while breaking the record for the deepest ever dive.
Victor Vescovo descended nearly 11km (seven miles) to the deepest place in the ocean – the Pacific Ocean’s Mariana Trench.
He spent four hours exploring the bottom of the trench in his submersible, built to withstand the immense pressure of the deep.
He found sea creatures, but also found a plastic bag and sweet wrappers.
Spiny Norman said:
Mariana Trench: Deepest-ever sub dive finds plastic bag.An American explorer has found plastic waste on the seafloor while breaking the record for the deepest ever dive.
Victor Vescovo descended nearly 11km (seven miles) to the deepest place in the ocean – the Pacific Ocean’s Mariana Trench.
He spent four hours exploring the bottom of the trench in his submersible, built to withstand the immense pressure of the deep.
He found sea creatures, but also found a plastic bag and sweet wrappers.
Damn, I thought nobody would ever find those.
I guess with all the visitors it gets, the bottom of the Mariana is not such a good place to hide stuff. Maybe the second or third deepest trench would be better.
Helicopters Sometimes Produce Spectacular Sparkling Rings When Operating in Desert Conditions and Here’s Why.
In the arid landscapes of Afghanistan, where American war correspondent and photographer Michael Yon accompanied U.S. troops in 2009, an extraordinary phenomenon came to light, one that added a touch of spectacle to the gritty realities of war. Yon observed an awe-inspiring spectacle while photographing helicopters taking off or descending in dusty conditions – their rotor blades would come alive, resembling nothing less than “distant galaxies” amidst the desert sands.
Spiny Norman said:
Helicopters Sometimes Produce Spectacular Sparkling Rings When Operating in Desert Conditions and Here’s Why.
I’ve seen that at night, produced by a helicopter flying below the one i was in.
It’s rotors produced a sort of blue-white flame effect. The air was quite humid, and the pilot said it was something to do with the water in the air and static electricity from the rotor blades/
captain_spalding said:
Spiny Norman said:
Helicopters Sometimes Produce Spectacular Sparkling Rings When Operating in Desert Conditions and Here’s Why.I’ve seen that at night, produced by a helicopter flying below the one i was in.
It’s rotors produced a sort of blue-white flame effect. The air was quite humid, and the pilot said it was something to do with the water in the air and static electricity from the rotor blades/
I’ve seen a fair bit of St Elmo’s fire when flying around. The best was when I was flying a Piper Aerostar through some rowdy weather. There was the usual lightning bolts running around parts of the windscreen, but also when I looked back at the prop I could see that the tips of the blades were making a purple ring in the air, and there were also sparks coming out of the tip of the spinner. Perhaps more surprising was a very bright cone of light coming out of the nose, just like a landing light – But there are no lights in that part of the plane.
Spiny Norman said:
captain_spalding said:
Spiny Norman said:
Helicopters Sometimes Produce Spectacular Sparkling Rings When Operating in Desert Conditions and Here’s Why.I’ve seen that at night, produced by a helicopter flying below the one i was in.
It’s rotors produced a sort of blue-white flame effect. The air was quite humid, and the pilot said it was something to do with the water in the air and static electricity from the rotor blades/
I’ve seen a fair bit of St Elmo’s fire when flying around. The best was when I was flying a Piper Aerostar through some rowdy weather. There was the usual lightning bolts running around parts of the windscreen, but also when I looked back at the prop I could see that the tips of the blades were making a purple ring in the air, and there were also sparks coming out of the tip of the spinner. Perhaps more surprising was a very bright cone of light coming out of the nose, just like a landing light – But there are no lights in that part of the plane.
Does it look like this?
captain_spalding said:
Spiny Norman said:
Helicopters Sometimes Produce Spectacular Sparkling Rings When Operating in Desert Conditions and Here’s Why.I’ve seen that at night, produced by a helicopter flying below the one i was in.
It’s rotors produced a sort of blue-white flame effect. The air was quite humid, and the pilot said it was something to do with the water in the air and static electricity from the rotor blades/
Electricity.. Tesla thought it was fascinating.
Kingy said:
Spiny Norman said:
captain_spalding said:I’ve seen that at night, produced by a helicopter flying below the one i was in.
It’s rotors produced a sort of blue-white flame effect. The air was quite humid, and the pilot said it was something to do with the water in the air and static electricity from the rotor blades/
I’ve seen a fair bit of St Elmo’s fire when flying around. The best was when I was flying a Piper Aerostar through some rowdy weather. There was the usual lightning bolts running around parts of the windscreen, but also when I looked back at the prop I could see that the tips of the blades were making a purple ring in the air, and there were also sparks coming out of the tip of the spinner. Perhaps more surprising was a very bright cone of light coming out of the nose, just like a landing light – But there are no lights in that part of the plane.
Does it look like this?
Yep!
Australia’s Weird Geographical Quirks.
Australia has some unique geographical quirks that you might not have already heard about. From surveying mistakes creating weird borders, to silly electoral boundaries Australia has a wealth of interesting geography.
There may be a mud volcano eruption in Brisbane some time soon(ish).
Spiny Norman said:
There may be a mud volcano eruption in Brisbane some time soon(ish).
Huh!
I have yet to find a geologic description of it.
Ophiocordyceps caloceroides infecting a tarantula. The fungus keeps the host alive as long as possible and directs the spider to the place where assocarps can spread the fungi spores more effectively.
Spiny Norman said:
Ophiocordyceps caloceroides infecting a tarantula. The fungus keeps the host alive as long as possible and directs the spider to the place where assocarps can spread the fungi spores more effectively.
Yucko.
The northern lights, quite spectacular indeed.
Spiny Norman said:
The northern lights, quite spectacular indeed.
Yes, aurora can be quite kaleidoscopic overhead.
Spiny Norman said:
The northern lights, quite spectacular indeed.
Agreed.
Bubblecar said:
Spiny Norman said:
The northern lights, quite spectacular indeed.Yes, aurora can be quite kaleidoscopic overhead.
Good
Pocket Mechanical Calculator – Addiator/Addifix.
Spiny Norman said:
Pocket Mechanical Calculator – Addiator/Addifix.
Thanks for the Flightradar app, Bill.
I’ve tried it on my laptop, using the Bluestacks Android emulator, but it’s VERY clunky, which probably says more about my laptop than anything else.
Yet to try it on PC or phone.
captain_spalding said:
Spiny Norman said:
Pocket Mechanical Calculator – Addiator/Addifix.Thanks for the Flightradar app, Bill.
I’ve tried it on my laptop, using the Bluestacks Android emulator, but it’s VERY clunky, which probably says more about my laptop than anything else.
Yet to try it on PC or phone.
Righto.
Yeah it should run better on a phone. It seems fine on mine at least.
This is the OmniVision OV6948, the world’s smallest camera, measuring just 0.575 × 0.575 × 0.232mm: it’s good for 40,000-pixel color images using an RGB Bayer back-side-illuminating chip.
Spiny Norman said:
This is the OmniVision OV6948, the world’s smallest camera, measuring just 0.575 × 0.575 × 0.232mm: it’s good for 40,000-pixel color images using an RGB Bayer back-side-illuminating chip.
The Landlord’s Dream!
The AirBnB owner’s Nirvana!
Spiny Norman said:
This is the OmniVision OV6948, the world’s smallest camera, measuring just 0.575 × 0.575 × 0.232mm: it’s good for 40,000-pixel color images using an RGB Bayer back-side-illuminating chip.
The snap button would be too small to operate without a microscope.
New World Record – from 0 to 100 km/h in 0.956 seconds.
https://www.youtube.com/watch?v=mvoFemftA34
That’s a Formula SAE car, as used the in university FSAE worldwide competitions.
I’d guess that it’s accelerating at a bit over 2 G’s, which means very sticky tyres and superb traction control.
Compared to a regular street car that’s massively faster, but still much slower than a Top Fuel drag car, which get off the line at about 6 G’s.
Spiny Norman said:
New World Record – from 0 to 100 km/h in 0.956 seconds.https://www.youtube.com/watch?v=mvoFemftA34
That’s a Formula SAE car, as used the in university FSAE worldwide competitions.
I’d guess that it’s accelerating at a bit over 2 G’s, which means very sticky tyres and superb traction control.Compared to a regular street car that’s massively faster, but still much slower than a Top Fuel drag car, which get off the line at about 6 G’s.
That’s one thing that continues to stun me- Teslas are scary stupid fast for acceleration- the fastest is open to debate, but independent tests put the 0-100 times for the S Plaid at 2.1 seconds with a 1/4 mile drag time of 9.4 seconds (to put that in perspective, the SS Commodore V8 (6L, 366ci) took 5.3 seconds 0-100, their ‘elcheapo’ Tesla 3 is a comparatively slow 3.5 seconds
Even the BYD Atto3 I am looking at buying is still relatively fast, a much more sedate 7.3 seconds (but at a much lower price tag than even the cheapest T3)- mind you that is still equal to a V6 Sorento, faster than a 2014 Sportage turbo AWD and would pull away from a 1960’s classic Corvette…. (half a second quicker!!!)
Mind you, the ‘vette still looks cooler…
(Atto 3 0-101kmh in 8 seconds- not exactly a ‘dragstrip timed run’ lol)
:-O
Makes the old Hilux look like a snail (over 14 seconds!!!)
boppa said:
Spiny Norman said:
New World Record – from 0 to 100 km/h in 0.956 seconds.https://www.youtube.com/watch?v=mvoFemftA34
That’s a Formula SAE car, as used the in university FSAE worldwide competitions.
I’d guess that it’s accelerating at a bit over 2 G’s, which means very sticky tyres and superb traction control.Compared to a regular street car that’s massively faster, but still much slower than a Top Fuel drag car, which get off the line at about 6 G’s.
That’s one thing that continues to stun me- Teslas are scary stupid fast for acceleration- the fastest is open to debate, but independent tests put the 0-100 times for the S Plaid at 2.1 seconds with a 1/4 mile drag time of 9.4 seconds (to put that in perspective, the SS Commodore V8 (6L, 366ci) took 5.3 seconds 0-100, their ‘elcheapo’ Tesla 3 is a comparatively slow 3.5 seconds
Even the BYD Atto3 I am looking at buying is still relatively fast, a much more sedate 7.3 seconds (but at a much lower price tag than even the cheapest T3)- mind you that is still equal to a V6 Sorento, faster than a 2014 Sportage turbo AWD and would pull away from a 1960’s classic Corvette…. (half a second quicker!!!)
Mind you, the ‘vette still looks cooler…
(Atto 3 0-101kmh in 8 seconds- not exactly a ‘dragstrip timed run’ lol)
:-O
Makes the old Hilux look like a snail (over 14 seconds!!!)
:)
Yeah one of these days I’d like to get a 2nd hand Nissan Leaf. Far simpler than a Tesla but I’m quite okay with that.
I looked at the Leaf- but their prices remain high still, and no towing (the Atto can tow up to 1200kg on a braked trailer)
Not bad for a ‘mid sized’ SUV with a 450-480km range… and a quick recharge time of 42 minutes for the big battery version on a fast charger (puts in 300km of range in that 42 mins)
I am looking seriously at it (it was that or the MG, and frankly BYD has the better reputation lol) even though I am totally offgrid (thankfully- the neighbour just got his electricity bill- well over a grand for three months!!!)
:-O
boppa said:
I looked at the Leaf- but their prices remain high still, and no towing (the Atto can tow up to 1200kg on a braked trailer)
Not bad for a ‘mid sized’ SUV with a 450-480km range… and a quick recharge time of 42 minutes for the big battery version on a fast charger (puts in 300km of range in that 42 mins)
I am looking seriously at it (it was that or the MG, and frankly BYD has the better reputation lol) even though I am totally offgrid (thankfully- the neighbour just got his electricity bill- well over a grand for three months!!!) :-O
Maybe give the MG 4 a test drive.
boppa said:
I looked at the Leaf- but their prices remain high still, and no towing (the Atto can tow up to 1200kg on a braked trailer)
Not bad for a ‘mid sized’ SUV with a 450-480km range… and a quick recharge time of 42 minutes for the big battery version on a fast charger (puts in 300km of range in that 42 mins)
I am looking seriously at it (it was that or the MG, and frankly BYD has the better reputation lol) even though I am totally offgrid (thankfully- the neighbour just got his electricity bill- well over a grand for three months!!!) :-O
I’d be very hesitant about buying a Chinese EV.
party_pants said:
boppa said:
I looked at the Leaf- but their prices remain high still, and no towing (the Atto can tow up to 1200kg on a braked trailer)
Not bad for a ‘mid sized’ SUV with a 450-480km range… and a quick recharge time of 42 minutes for the big battery version on a fast charger (puts in 300km of range in that 42 mins)
I am looking seriously at it (it was that or the MG, and frankly BYD has the better reputation lol) even though I am totally offgrid (thankfully- the neighbour just got his electricity bill- well over a grand for three months!!!) :-O
I’d be very hesitant about buying a Chinese EV.
I’d be very hesitant about buying a Chinese <insert brand="" here="">.</insert>
boppa said:
I looked at the Leaf- but their prices remain high still, and no towing (the Atto can tow up to 1200kg on a braked trailer)
Not bad for a ‘mid sized’ SUV with a 450-480km range… and a quick recharge time of 42 minutes for the big battery version on a fast charger (puts in 300km of range in that 42 mins)
I am looking seriously at it (it was that or the MG, and frankly BYD has the better reputation lol) even though I am totally offgrid (thankfully- the neighbour just got his electricity bill- well over a grand for three months!!!) :-O
John from autoexpert on youtube says this. EVs are a waste of money and start fires. From a greenhouse perspective having house batteries gives you the biggest bang for your buck regarding CO2 output.
You might be better off getting an LPG conversion if that’s still possible in Australia, 90s Australia seemed to have more LPG cars running around – I never see them now. One option – develop a government owned facility to find and extract LPG in Australia, everyone converts to LPG.
party_pants said:
boppa said:
I looked at the Leaf- but their prices remain high still, and no towing (the Atto can tow up to 1200kg on a braked trailer)
Not bad for a ‘mid sized’ SUV with a 450-480km range… and a quick recharge time of 42 minutes for the big battery version on a fast charger (puts in 300km of range in that 42 mins)
I am looking seriously at it (it was that or the MG, and frankly BYD has the better reputation lol) even though I am totally offgrid (thankfully- the neighbour just got his electricity bill- well over a grand for three months!!!) :-O
I’d be very hesitant about buying a Chinese EV.
LOL- I wouldn’t…
(most people are unaware that BYD is a HUGE company, who sell more cars annually than Tesla, the Atto3 is the ‘updated’ E6- which has been on sale since 2009, and they make trucks and buses as well since 2012…
Still can’t buy a Tesla semi….
They make more lithium batteries (they make all their own batteries in house) annually than Tesla does…
(oh and Tesla now BUYS BYD blade batteries for their T3’s made in Europe and China…)
So if you buy an ‘Aussie’ T3- it was probably made in China and runs on BYD batteries…
Spiny Norman said:
New World Record – from 0 to 100 km/h in 0.956 seconds.https://www.youtube.com/watch?v=mvoFemftA34
That’s a Formula SAE car, as used the in university FSAE worldwide competitions.
I’d guess that it’s accelerating at a bit over 2 G’s, which means very sticky tyres and superb traction control.Compared to a regular street car that’s massively faster, but still much slower than a Top Fuel drag car, which get off the line at about 6 G’s.
0 to 100 km/h in 0.956 s is very close to 3.0 G.
wookiemeister said:
boppa said:
I looked at the Leaf- but their prices remain high still, and no towing (the Atto can tow up to 1200kg on a braked trailer)
Not bad for a ‘mid sized’ SUV with a 450-480km range… and a quick recharge time of 42 minutes for the big battery version on a fast charger (puts in 300km of range in that 42 mins)
I am looking seriously at it (it was that or the MG, and frankly BYD has the better reputation lol) even though I am totally offgrid (thankfully- the neighbour just got his electricity bill- well over a grand for three months!!!) :-O
I’ve been 100% self sufficient with electricity since the beginning of winter – no air-conditioningrunning overnight only fans ( not that only fans). Still have gas hot water. I’m thinking solar hot water but we’d need two tanks of water not one.John from autoexpert on youtube says this. EVs are a waste of money and start fires. From a greenhouse perspective having house batteries gives you the biggest bang for your buck regarding CO2 output.
You might be better off getting an LPG conversion if that’s still possible in Australia, 90s Australia seemed to have more LPG cars running around – I never see them now. One option – develop a government owned facility to find and extract LPG in Australia, everyone converts to LPG.
‘John’ should look at facts instead of listening to anti EV nonsense…
If you are worried about car fires- you are 60 times less likely to have a EV catch fire than an ICE vehicle…
I don’t own one (yet- hopefully before christmas) but so far, the BYD stands heads above the MG (I have gotten to test drive several different brands so far)- and remembering that I am totally offgrid, with sufficient planning, you can achieve total offgrid capability with no loss of amenities anywhere in Australia…
(with 18kw of panels eventually going on the roof, supporting an EV will be more than easily done- that will give me about 90kwh a day generated in spring and autumn, about 70kwh a day in winter and about 70kwh a day in summer…
(despite what many think- unless you are well south, summer is NOT a good time for PV solar…)
The Rev Dodgson said:
Spiny Norman said:
New World Record – from 0 to 100 km/h in 0.956 seconds.https://www.youtube.com/watch?v=mvoFemftA34
That’s a Formula SAE car, as used the in university FSAE worldwide competitions.
I’d guess that it’s accelerating at a bit over 2 G’s, which means very sticky tyres and superb traction control.Compared to a regular street car that’s massively faster, but still much slower than a Top Fuel drag car, which get off the line at about 6 G’s.
0 to 100 km/h in 0.956 s is very close to 3.0 G.
Remarkably fast.
I’d guess that the tyres were intended for wet weather, as the compound used for wets is much softer than dry tyres because of the cooling effect of the water. But when wets are used in the dry, they last maybe a minute before starting to fall apart from the heat.
Anyway, I reckon they used ungrooved wets and perhaps with a chemical additive to improve the grip a bit more again.
Spiny Norman said:
The Rev Dodgson said:Spiny Norman said:
New World Record – from 0 to 100 km/h in 0.956 seconds.https://www.youtube.com/watch?v=mvoFemftA34
That’s a Formula SAE car, as used the in university FSAE worldwide competitions.
I’d guess that it’s accelerating at a bit over 2 G’s, which means very sticky tyres and superb traction control.Compared to a regular street car that’s massively faster, but still much slower than a Top Fuel drag car, which get off the line at about 6 G’s.
0 to 100 km/h in 0.956 s is very close to 3.0 G.
Remarkably fast.
I’d guess that the tyres were intended for wet weather, as the compound used for wets is much softer than dry tyres because of the cooling effect of the water. But when wets are used in the dry, they last maybe a minute before starting to fall apart from the heat.
Anyway, I reckon they used ungrooved wets and perhaps with a chemical additive to improve the grip a bit more again.
https://www.facebook.com/watch/?v=1972284439822866&ref=sharing
Why can’t robots pass CAPTCHA tests?
Bogsnorkler said:
https://www.facebook.com/watch/?v=1972284439822866&ref=sharingWhy can’t robots pass CAPTCHA tests?
I’ve often thought if it detects the tremor of your finger as you push the buttons
Spiny Norman said:
The cheap Chinese bulb that won’t turn off.These LED bulbs will continue to draw power from the mains indefinitely even once they’re switched off and the circuit is broken. But how?!
I noticed this a while back Bill, this is actually quite common (and not just in the cheap Chinese ones either, some rather expensive ones do it too- the early Philips bulbs also commonly did it, till they found the cure…)
It ‘often’ is a sign of ‘reversed wiring’ where the switch in in the neutral line instead of the active/live wire, but it also happens even if it is in the active wire…
In fact, it happens in my shed- which are DC LEDs, running directly from the battery bank!!!!
The ‘cure’ is simply the manufacturer adding a 1M resistor across the LED string- but you know- its cheaper to leave it out…
:-(
I was confuzzled as to why my own (DC) did the ‘ghost glow’ thing- its straight low voltage 12v DC being applied, then I found it stopped when I turned the inverter off…
Even though they aren’t plugged into the inverter…
????
Turns out it is a combination of how they are wired-‘rooftop’ feed, with lamp bases at intervals, and a ‘dropper’ down to each switch…
(And this applies to my DC ones as well as the ‘normal’ AC ones most people use…)
Even though the switch is open (off), there is a minute varying voltage induced in the open switched wire (white) from the adjacent feed wire (red) that goes down and back from the lamp base to the switch…
And LED lamps are just so damn efficient, that even on this TINY power, they will dimly light up….
(And it truly is tiny- I tried measuring it, and even the tiny added load of my meter was sufficient to ‘put it out’)
Hence why adding that 1M resistor is enough to stop it happening
In my case, the inverter causes a tiny leakage across to the DC cables where they run next to each other for a short distance (about 30-40cm although in separate conduit at the inverter) where it induces a tiny voltage fluctuation in the DC feed cable ie a small AC voltage superimposed on the DC voltage- and when you get to the ‘feeder’ drop at each switch- it acts like a really ‘lossy’ single turn transformer, and puts a low voltage AC signal on the open circuited light switched wire- and thats enough to make the bulb light dimly…
In my shed, you can actually see that effect of voltage drop on the system- the bulb nearest the battery bank is brightest, and they get dimmer the further away from it they are…
Disconnect the ‘dropper feed’ at the lamp base, and bingo- no glow…
It’s because of that ‘shared cable’ 2 wires in the same sheath dropper, and inductive/capacitive coupling
Doesn’t work on old incandescent bulbs, but like I said- LED’s are just too damn efficient and take TINY amounts of power light up dimly…
Each bulb in my case ‘crosses the mains cable with the DC behind the pole (but in separate conduit) and that is enough to couple the AC in….
And although they ‘look like’ normal mains powered bulbs, these are sold for the offgrid community, where they run on 12vdc to 85vdc, and yet allow you to use ‘normal mains lamp fittings’
All explained….
:-)
In my case it’s actually handy as they give just barely enough light to see where the switches are- and the current is so low that the meters on my system can’t even measure it, so it isn’t enough to affect my battery discharge rate…
So I left it as is lol
The Unsettling Truth about Human Consciousness | The Split Brain experiment that broke neuroscience.
The Alexeyev SM-1, essentially a real-life Star Wars speeder. Hit speeds of up to 270 kph over ice plains, snow, and water. Flew about 4 feet above the ground. The first Soviet ekranoplan.
The great great grandfather of the https://planehistoria.com/lun-class-ekranoplan
Spiny Norman said:
The Alexeyev SM-1, essentially a real-life Star Wars speeder. Hit speeds of up to 270 kph over ice plains, snow, and water. Flew about 4 feet above the ground. The first Soviet ekranoplan.
The great great grandfather of the https://planehistoria.com/lun-class-ekranoplan
They stopped making them because, when the XP-38 came out, they were just not in demand.
Spiny Norman said:
The Alexeyev SM-1, essentially a real-life Star Wars speeder. Hit speeds of up to 270 kph over ice plains, snow, and water. Flew about 4 feet above the ground. The first Soviet ekranoplan.
The great great grandfather of the https://planehistoria.com/lun-class-ekranoplan
Looks highly dangerous.
captain_spalding said:
Spiny Norman said:
The Alexeyev SM-1, essentially a real-life Star Wars speeder. Hit speeds of up to 270 kph over ice plains, snow, and water. Flew about 4 feet above the ground. The first Soviet ekranoplan.
The great great grandfather of the https://planehistoria.com/lun-class-ekranoplan
They stopped making them because, when the XP-38 came out, they were just not in demand.
History is very different. It could only get a few feet off the ground and was useless when waves exceeded this level. Therefore very limited application.
https://www.facebook.com/photo?fbid=10160992725379872&set=pcb.6709286919140599
Here is a paper by Ken Leighton and James Canning about the Canning Stock Route. It is quite interesting and covers the methodology Canning used to do the survey and follows up on some of the marks Canning left.
Steve Mould again – This life-sized pop pop boat actually works.
26 September 1983. 19.37.49 UTC/GMT. Soyuz T-10-1 (Soyuz T-10a) mission to the Salyut 7 space station, was destroyed on the launch pad by fire. The launch escape system of the Soyuz spacecraft fired two seconds before the vehicle exploded, saving the crew.
An absolutely suburb review of the Star Wars series, Andor.
Spiny Norman said:
An absolutely suburb review of the Star Wars series, Andor.
On reflection … I think it’s probably the best SW related material since Empire
dv said:
Spiny Norman said:
An absolutely suburb review of the Star Wars series, Andor.On reflection … I think it’s probably the best SW related material since Empire
Nods.
Though I think it’s the best out of everything SW.
Certainly not for everyone here, but the physics behind these cars is astounding.
300 MPH TO THE EIGHTH! Mike Salinas’s Top Fuel dragster is the first piston car in history to 300 MPH in the 1/8-mile, having run 300.80 mph in 660 feet at the NHRA Carolina Nationals at Zmax Dragway minutes ago! It was 2.936 to 660 and out the back at 3.647 at 338 mph. Congrats Rob Flynn! “We fired everything we could think of at it and thank goodness it stuck.
That’s 0 – 482 km/h in 201 metres and 2.9 seconds.
Delightfully violent.
Spiny Norman said:
Certainly not for everyone here, but the physics behind these cars is astounding.
300 MPH TO THE EIGHTH! Mike Salinas’s Top Fuel dragster is the first piston car in history to 300 MPH in the 1/8-mile, having run 300.80 mph in 660 feet at the NHRA Carolina Nationals at Zmax Dragway minutes ago! It was 2.936 to 660 and out the back at 3.647 at 338 mph. Congrats Rob Flynn! “We fired everything we could think of at it and thank goodness it stuck.
That’s 0 – 482 km/h in 201 metres and 2.9 seconds.
Delightfully violent.
They are pretty cool, they overload so many senses at once
Cymek said:
Spiny Norman said:
Certainly not for everyone here, but the physics behind these cars is astounding.
300 MPH TO THE EIGHTH! Mike Salinas’s Top Fuel dragster is the first piston car in history to 300 MPH in the 1/8-mile, having run 300.80 mph in 660 feet at the NHRA Carolina Nationals at Zmax Dragway minutes ago! It was 2.936 to 660 and out the back at 3.647 at 338 mph. Congrats Rob Flynn! “We fired everything we could think of at it and thank goodness it stuck.
That’s 0 – 482 km/h in 201 metres and 2.9 seconds.
Delightfully violent.
They are pretty cool, they overload so many senses at once
Top Fuelers are Awesome
Cymek said:
Spiny Norman said:
Certainly not for everyone here, but the physics behind these cars is astounding.
300 MPH TO THE EIGHTH! Mike Salinas’s Top Fuel dragster is the first piston car in history to 300 MPH in the 1/8-mile, having run 300.80 mph in 660 feet at the NHRA Carolina Nationals at Zmax Dragway minutes ago! It was 2.936 to 660 and out the back at 3.647 at 338 mph. Congrats Rob Flynn! “We fired everything we could think of at it and thank goodness it stuck.
That’s 0 – 482 km/h in 201 metres and 2.9 seconds.
Delightfully violent.
They are pretty cool, they overload so many senses at once
I seem to recall that the steam catapult aboard HMAS Melbourne would take my mate’s A-4 Skyhawk from 0 to 300 kmh in just on 3 seconds.
He said that he never got tired of it.
Spiny Norman said:
Certainly not for everyone here, but the physics behind these cars is astounding.
300 MPH TO THE EIGHTH! Mike Salinas’s Top Fuel dragster is the first piston car in history to 300 MPH in the 1/8-mile, having run 300.80 mph in 660 feet at the NHRA Carolina Nationals at Zmax Dragway minutes ago! It was 2.936 to 660 and out the back at 3.647 at 338 mph. Congrats Rob Flynn! “We fired everything we could think of at it and thank goodness it stuck.
That’s 0 – 482 km/h in 201 metres and 2.9 seconds.
Delightfully violent.
Wow!
captain_spalding said:
Cymek said:
Spiny Norman said:
Certainly not for everyone here, but the physics behind these cars is astounding.
300 MPH TO THE EIGHTH! Mike Salinas’s Top Fuel dragster is the first piston car in history to 300 MPH in the 1/8-mile, having run 300.80 mph in 660 feet at the NHRA Carolina Nationals at Zmax Dragway minutes ago! It was 2.936 to 660 and out the back at 3.647 at 338 mph. Congrats Rob Flynn! “We fired everything we could think of at it and thank goodness it stuck.
That’s 0 – 482 km/h in 201 metres and 2.9 seconds.
Delightfully violent.
They are pretty cool, they overload so many senses at once
I seem to recall that the steam catapult aboard HMAS Melbourne would take my mate’s A-4 Skyhawk from 0 to 300 kmh in just on 3 seconds.
He said that he never got tired of it.
Quite a ride indeed. I see that the pilots are leaving their hands off the controls, so they don’t accidentally give a heap of nose-up with the G’s. Shortly after leaving the deck they get both hands on the controls and start doing pilot stuff.
I’d reckon that the control stick has a counterbalance on the other side of pivot to neutralise the abnormal acceleration.
Spiny Norman said:
captain_spalding said:
Cymek said:They are pretty cool, they overload so many senses at once
I seem to recall that the steam catapult aboard HMAS Melbourne would take my mate’s A-4 Skyhawk from 0 to 300 kmh in just on 3 seconds.
He said that he never got tired of it.
Quite a ride indeed. I see that the pilots are leaving their hands off the controls, so they don’t accidentally give a heap of nose-up with the G’s. Shortly after leaving the deck they get both hands on the controls and start doing pilot stuff.
I’d reckon that the control stick has a counterbalance on the other side of pivot to neutralise the abnormal acceleration.
i still reckon rally driving will be awesome!
monkey skipper said:
Spiny Norman said:
captain_spalding said:I seem to recall that the steam catapult aboard HMAS Melbourne would take my mate’s A-4 Skyhawk from 0 to 300 kmh in just on 3 seconds.
He said that he never got tired of it.
Quite a ride indeed. I see that the pilots are leaving their hands off the controls, so they don’t accidentally give a heap of nose-up with the G’s. Shortly after leaving the deck they get both hands on the controls and start doing pilot stuff.
I’d reckon that the control stick has a counterbalance on the other side of pivot to neutralise the abnormal acceleration.
i still reckon rally driving will be awesome!
where will should be would!
monkey skipper said:
Spiny Norman said:
captain_spalding said:I seem to recall that the steam catapult aboard HMAS Melbourne would take my mate’s A-4 Skyhawk from 0 to 300 kmh in just on 3 seconds.
He said that he never got tired of it.
Quite a ride indeed. I see that the pilots are leaving their hands off the controls, so they don’t accidentally give a heap of nose-up with the G’s. Shortly after leaving the deck they get both hands on the controls and start doing pilot stuff.
I’d reckon that the control stick has a counterbalance on the other side of pivot to neutralise the abnormal acceleration.
i still reckon rally driving will be awesome!
It certainly is!
I’ve only done a little of it and years ago, but it was great fun. A mate of mine is one of the top rally drivers in Australia as well. He’s massively faster than me. :)
Spiny Norman said:
monkey skipper said:
Spiny Norman said:Quite a ride indeed. I see that the pilots are leaving their hands off the controls, so they don’t accidentally give a heap of nose-up with the G’s. Shortly after leaving the deck they get both hands on the controls and start doing pilot stuff.
I’d reckon that the control stick has a counterbalance on the other side of pivot to neutralise the abnormal acceleration.
i still reckon rally driving will be awesome!
It certainly is!
I’ve only done a little of it and years ago, but it was great fun. A mate of mine is one of the top rally drivers in Australia as well. He’s massively faster than me. :)
you are both probably faster than me as well. :D
The sphere is here: ‘Epic’ Vegas destination makes promise to change entertainment world.
Spiny Norman said:
The sphere is here: ‘Epic’ Vegas destination makes promise to change entertainment world.
Puts a new spin on taking your money?
Spiny Norman said:
The sphere is here: ‘Epic’ Vegas destination makes promise to change entertainment world.
MSG Sphere?
A taste enhancer?
Self-assembling material pops into 3D.
Rescued After 3 Days in Sub 488m Deep.
The Densest City In The World Had A (Strange) Secret.
Kowloon Walled City.
Spiny Norman said:
The Densest City In The World Had A (Strange) Secret.Kowloon Walled City.
I thought that was Logan City
The Dark Side of British History You Weren’t Taught in School.
This is bloody horrific. :(
Spiny Norman said:
The Dark Side of British History You Weren’t Taught in School.This is bloody horrific. :(
I believe this is based on the highly developed arrogant attitude they have regarding the world and everything in it, inasmuch they are better than, are more intelligent than, and consequently more entitled. The wretched class system that developed in Britain coupled with the pomposity of the Victorian era when Britain ruled the waves compounded this sense of superiority that whatever they do is justifiable and whatever they want, they can just take.
This arrogance is inferred from their youngest age and from the lowest level of society, being taught in schools and social contact and from my personal experience, is extremely difficult to change as deep down it still influences our outlook. The results of this state of mind can be seen in just about every country they took from traditional owners, especially those they could dominate by the use of more advanced weaponry. The British (myself included) should be ashamed of their history, but they are not because they have little consideration for such matters and consider themselves beyond such distasteful things.
PermeateFree said:
Spiny Norman said:
The Dark Side of British History You Weren’t Taught in School.This is bloody horrific. :(
I believe this is based on the highly developed arrogant attitude they have regarding the world and everything in it, inasmuch they are better than, are more intelligent than, and consequently more entitled. The wretched class system that developed in Britain coupled with the pomposity of the Victorian era when Britain ruled the waves compounded this sense of superiority that whatever they do is justifiable and whatever they want, they can just take.
This arrogance is inferred from their youngest age and from the lowest level of society, being taught in schools and social contact and from my personal experience, is extremely difficult to change as deep down it still influences our outlook. The results of this state of mind can be seen in just about every country they took from traditional owners, especially those they could dominate by the use of more advanced weaponry. The British (myself included) should be ashamed of their history, but they are not because they have little consideration for such matters and consider themselves beyond such distasteful things.
Don’t underestimate the role of Christianity in building this mentality of superiority either: we have the Bible and salvation through Jesus, and you don’t.
PermeateFree said:
Spiny Norman said:
The Dark Side of British History You Weren’t Taught in School.This is bloody horrific. :(
I believe this is based on the highly developed arrogant attitude they have regarding the world and everything in it, inasmuch they are better than, are more intelligent than, and consequently more entitled. The wretched class system that developed in Britain coupled with the pomposity of the Victorian era when Britain ruled the waves compounded this sense of superiority that whatever they do is justifiable and whatever they want, they can just take.
This arrogance is inferred from their youngest age and from the lowest level of society, being taught in schools and social contact and from my personal experience, is extremely difficult to change as deep down it still influences our outlook. The results of this state of mind can be seen in just about every country they took from traditional owners, especially those they could dominate by the use of more advanced weaponry. The British (myself included) should be ashamed of their history, but they are not because they have little consideration for such matters and consider themselves beyond such distasteful things.
Hear hear.
One of my favourite crazy projects, Project Habakkuk.
The camshaft & accessory drive system on a Renault Formula One engine.
Mammatus cloud. Fairly rare to see.
The Soviet Buran space shuttle did some flight testing with four small jet engines attached so it could fly around under its own power to test various flight conditions.
I’m guessing that the performance, even with all the engines running, would have been marginal.
Spiny Norman said:
The camshaft & accessory drive system on a Renault Formula One engine.
That’s just showing off.
Spiny Norman said:
Mammatus cloud. Fairly rare to see.
Diseased sky.
Spiny Norman said:
Mammatus cloud. Fairly rare to see.
That was spectacular.
We had some here last year, that ended above the western horizon at sunset. The colours were amazing.
9 October 1999. Final flight of the Lockheed SR-71 Blackbird, (AF Ser. No. 61-7980/NASA 844) took place during the Edwards AFB Open House Airshow. American advanced, long-range, Mach 3 plus strategic reconnaissance aircraft.
A Messerschmitt Bf-109, with the engine removed. You can see the two machine guns that sat over the engine and fired between the propeller blades, and the larger 20mm cannon that fired through the centre of the propeller shaft. The engine was a large V-12, mounted inverted so the cannon barrel would have sat between the cylinders.
Wirtz pumps are really clever.
Spiny Norman said:
Wirtz pumps are really clever.
that’s cool, physics demonstrated
Quantum Computing with Light: The Breakthrough?
In post WWII Russia, Stalin banned ownership of any Western music.
All records allowed in the country had to be from Russian composers. But there was an Underground hungry for Western popular music, from Jazz and Blues to Rock & Roll.
But vinyl smuggling was dangerous, and acquiring the scarce material to make copies of those records arriving in the country was expensive and very risky.
An ingenious solution to this problem began to emerge in the form of “bone music,” or sometimes called “bones ‘n’ ribs” music, or simply Ribs.
A 19-year-old young sound engineer Ruslan Bogoslowski, from Leningrad, changed the rules of the game when he created a device to hack Western albums so he could distribute them all over Russia. The problem was that he couldn’t find material to copy his impressions on, vinyl was scarce as all oil derived products after the war.
So one day he ran into a pile of discarded X-rays and it worked!. At that time Russian law ordered that all X-rays had to be destroyed after 1 year of storage because they were flammable so he searched in trash cans and paid nurses for X-ray plates and for 20 years did about 1,000,000 copies of smuggling on X-ray plates, from the classics to the Beach Boys.
… And by the way, he eventually spent five years imprisoned in Siberia for this rebellion (no one has any idea what a prison in Siberia with 30°C below zero was all year round).
For more than 20 years, Bone Music was the only way Russian music lovers, could get Western music, played at “music and coffee parties” in their kitchens, away from the ears and eyes of the KGB.
This is a 78 rpm recording of Raj Kapoor’s Indian song ‘Awaara’ on an exposed chest x-ray. Probably around 1951. Each record was handmade and unique…
Music of the bones.
A testament to underground courage to subvert authority, rebellion and love of music.
Spiny Norman said:
In post WWII Russia, Stalin banned ownership of any Western music.
All records allowed in the country had to be from Russian composers. But there was an Underground hungry for Western popular music, from Jazz and Blues to Rock & Roll.
But vinyl smuggling was dangerous, and acquiring the scarce material to make copies of those records arriving in the country was expensive and very risky.
An ingenious solution to this problem began to emerge in the form of “bone music,” or sometimes called “bones ‘n’ ribs” music, or simply Ribs.
A 19-year-old young sound engineer Ruslan Bogoslowski, from Leningrad, changed the rules of the game when he created a device to hack Western albums so he could distribute them all over Russia. The problem was that he couldn’t find material to copy his impressions on, vinyl was scarce as all oil derived products after the war.
So one day he ran into a pile of discarded X-rays and it worked!. At that time Russian law ordered that all X-rays had to be destroyed after 1 year of storage because they were flammable so he searched in trash cans and paid nurses for X-ray plates and for 20 years did about 1,000,000 copies of smuggling on X-ray plates, from the classics to the Beach Boys.
… And by the way, he eventually spent five years imprisoned in Siberia for this rebellion (no one has any idea what a prison in Siberia with 30°C below zero was all year round).
For more than 20 years, Bone Music was the only way Russian music lovers, could get Western music, played at “music and coffee parties” in their kitchens, away from the ears and eyes of the KGB.
This is a 78 rpm recording of Raj Kapoor’s Indian song ‘Awaara’ on an exposed chest x-ray. Probably around 1951. Each record was handmade and unique…
Music of the bones.
A testament to underground courage to subvert authority, rebellion and love of music.
That’s quite ingenious and cool
Spiny Norman said:
In post WWII Russia, Stalin banned ownership of any Western music.
All records allowed in the country had to be from Russian composers. But there was an Underground hungry for Western popular music, from Jazz and Blues to Rock & Roll.
But vinyl smuggling was dangerous, and acquiring the scarce material to make copies of those records arriving in the country was expensive and very risky.
An ingenious solution to this problem began to emerge in the form of “bone music,” or sometimes called “bones ‘n’ ribs” music, or simply Ribs.
A 19-year-old young sound engineer Ruslan Bogoslowski, from Leningrad, changed the rules of the game when he created a device to hack Western albums so he could distribute them all over Russia. The problem was that he couldn’t find material to copy his impressions on, vinyl was scarce as all oil derived products after the war.
So one day he ran into a pile of discarded X-rays and it worked!. At that time Russian law ordered that all X-rays had to be destroyed after 1 year of storage because they were flammable so he searched in trash cans and paid nurses for X-ray plates and for 20 years did about 1,000,000 copies of smuggling on X-ray plates, from the classics to the Beach Boys.
… And by the way, he eventually spent five years imprisoned in Siberia for this rebellion (no one has any idea what a prison in Siberia with 30°C below zero was all year round).
For more than 20 years, Bone Music was the only way Russian music lovers, could get Western music, played at “music and coffee parties” in their kitchens, away from the ears and eyes of the KGB.
This is a 78 rpm recording of Raj Kapoor’s Indian song ‘Awaara’ on an exposed chest x-ray. Probably around 1951. Each record was handmade and unique…
Music of the bones.
A testament to underground courage to subvert authority, rebellion and love of music.
They’d be collectors items for sure.
Could this be the first evidence for string theory?
Which Country is Most Likely to Use a Nuclear Bomb First.
Earth’s north magnetic pole is on the move – here’s what will happen when our poles flip.
Spiny Norman said:
Earth’s north magnetic pole is on the move – here’s what will happen when our poles flip.
The big question: will Australia be at the top of the world maps then?
captain_spalding said:
Spiny Norman said:
Earth’s north magnetic pole is on the move – here’s what will happen when our poles flip.
The big question: will Australia be at the top of the world maps then?
And How Good Is Purportedly SCIENCE Articles Normalising Conflict¿
Earth having more than two poles is not a good thing. This causes the planet to have multiple magnetic fields which then fight each other. When the poles flip, this battle weakens the Earth’s protective magnetic field by up to 90%.
captain_spalding said:
Spiny Norman said:
Earth’s north magnetic pole is on the move – here’s what will happen when our poles flip.The big question: will Australia be at the top of the world maps then?
No, Tasmania.
Spiny Norman said:
Earth’s north magnetic pole is on the move – here’s what will happen when our poles flip.
“There’s the geographic one in northern Canada,”
When did that happen?
The Rev Dodgson said:
Spiny Norman said:
Earth’s north magnetic pole is on the move – here’s what will happen when our poles flip.“There’s the geographic one in northern Canada,”
When did that happen?
Yeah that’s the first thing I spotted. I chalked it up to a bit of miscommunication.
The Rev Dodgson said:
Spiny Norman said:
Earth’s north magnetic pole is on the move – here’s what will happen when our poles flip.
“There’s the geographic one in northern Canada,”
When did that happen?
1907
roughbarked said:
captain_spalding said:
Spiny Norman said:
Earth’s north magnetic pole is on the move – here’s what will happen when our poles flip.The big question: will Australia be at the top of the world maps then?
No, Tasmania.
Ah, so, Tasmania is not part of Australia?
We’re right, then, in leaving it off maps of the country.
captain_spalding said:
roughbarked said:
captain_spalding said:The big question: will Australia be at the top of the world maps then?
No, Tasmania.
Ah, so, Tasmania is not part of Australia?
We’re right, then, in leaving it off maps of the country.
;) I was simply thinking of it from the Tasmanian perspective, in that you can buy tshirts in Tassie that have Tassie on top of the map.
Would Your Blood Actually Boil In Space?
Spiny Norman said:
Would Your Blood Actually Boil In Space?
Bends The Truth
Not confirmed but anyway -
The Rift Valley is located in Pinglu, Shanxi on the Loess Plateau, a highland area in north-central China covering some 400,000 square km. It was formed due to movements within the earth’s crust and it is about 10 km long.
Spiny Norman said:
Not confirmed but anyway -The Rift Valley is located in Pinglu, Shanxi on the Loess Plateau, a highland area in north-central China covering some 400,000 square km. It was formed due to movements within the earth’s crust and it is about 10 km long.
Confirmed:
https://en.wikipedia.org/wiki/Shanxi_Rift_System
Figure’s humanoid is already walking and performing autonomous tasks.
After just 12 months of development, Figure has released video footage of its humanoid robot walking – and it’s looking pretty sprightly compared to its commercial competition. It’s our first look at a prototype that should be doing useful work within months.
Figure is taking a bluntly pragmatic approach to humanoid robotics. It doesn’t care about running, jumping, or doing backflips; its robot is designed to get to work and make itself useful as quickly as possible, starting with easy jobs involving moving things around in a warehouse-type environment, and then expanding its abilities to take over more and more tasks.
A map of the various submarine network cables around the world.
0 – 100 in less than a second!
Tom Scott drives a Formula SAE car that is a 4WD EV.
NASA, the early years.
https://www.youtube.com/watch?v=JqPs77j3qDI
I’d love to go to one of those festivals.
Strange Asteroid Polyhymnia Could Be Hiding Never Before Seen Elements.
Spiny Norman said:
Strange Asteroid Polyhymnia Could Be Hiding Never Before Seen Elements.
That’s rather devious of it.
Designing A Self Propelling Ionic Thrust Wing.
I’m not convinced it’ll have much performance in the full-scale model, but it’s still interesting.
Spiny Norman said:
Designing A Self Propelling Ionic Thrust Wing.I’m not convinced it’ll have much performance in the full-scale model, but it’s still interesting.
Yes. Interesting is what it is.
Strange Triple Star Disappeared In Just 50 Minutes and Nobody Knows Why.
Is iron the Achilles’ heel for cancer?
Cancer cells hoard iron in unusually high quantities. Scientists have discovered how to leverage this to create safer cancer drugs.
Australia’s Secret Chernobyl.
This is the tragic story of Wittenoom – a highly toxic city that was once populated by thousands.
Spiny Norman said:
Australia’s Secret Chernobyl.This is the tragic story of Wittenoom – a highly toxic city that was once populated by thousands.
Been there. Camped along the gorge at a lovely waterhole.
The most difficult Chinese character in the world means ‘biáng’, a noodle dish.
It’s made up of 58 strokes in its traditional form and it was encoded in Unicode in 2020 only.
Spiny Norman said:
The most difficult Chinese character in the world means ‘biáng’, a noodle dish.It’s made up of 58 strokes in its traditional form and it was encoded in Unicode in 2020 only.
I knew that.
Here’s a recipe that contains that info. One of eight biang biang noodles recipes.
https://omnivorescookbook.com/biang-biang-noodles
Michael V said:
Spiny Norman said:
The most difficult Chinese character in the world means ‘biáng’, a noodle dish.It’s made up of 58 strokes in its traditional form and it was encoded in Unicode in 2020 only.
I knew that.
Here’s a recipe that contains that info. One of eight biang biang noodles recipes.
https://omnivorescookbook.com/biang-biang-noodles
Eight biang biang noodles I have saved.
A speculative Soviet 1960’s design for a nuclear airship.
Spiny Norman said:
A speculative Soviet 1960’s design for a nuclear airship.
Where’s the swimming pool?
Weather Station Kurt was an automated weather outpost secretly established by Nazi Germany on the Labrador coast in Newfoundland in 1943, designed to provide critical meteorological data for military operations in the North Atlantic.
Despite its brief operational life, Kurt showcased advanced technology with its autonomous functioning and sophisticated instruments for measuring temperature, wind, and atmospheric pressure.
Its discovery in 1977 by historian Selma Barkham shed light on the covert presence of German operations in North America during World War II and underscored the strategic importance of meteorological data in wartime.
The deployment of the German Weather Station Kurt was a clandestine operation of considerable complexity, demonstrating a blend of ingenuity and audacity. U-537, a Type IXC U-boat of the Kriegsmarine, had the unique distinction of being chosen for this task.
The submarine departed from its base in Norway carrying not only its crew but also a specialized team equipped to install the weather station. Their destination was a desolate, uninhabited stretch of the Labrador coast in Newfoundland, far from prying eyes, yet strategically positioned to fill a critical gap in the meteorological data network.
Upon reaching the coast of Labrador in October 1943, the crew, led by Kapitänleutnant Peter Schrewe, faced the daunting task of setting up the station under harsh weather conditions and with the constant threat of Allied detection. Their operation was not only a race against time but also against the elements. The installation had to be swift to minimize the risk of being discovered by the Allies, whose naval and air patrols were a continual danger.
The Weather Station Kurt remained lost to time and memory until its unexpected discovery in 1977, not by a military operation or a government expedition, but by a historian named Selma Barkham. Barkham was conducting research on the historical land use of the Labrador coast when she stumbled upon the weather station. The site, which had sat undisturbed for over three decades, was a veritable time capsule from World War II.
The discovery of Kurt was met with a mix of surprise and fascination. For many, it was the first tangible evidence of German military presence in North America, a sobering reminder that the war had reached far closer to home than previously believed. It provided historians with a rare artifact of the war’s secret battles—those fought with intelligence, information, and environmental data.
China’s ‘least convenient convenience store’ that juts out from a cliff offers relief to climbers.
CHANGSHA – Imagine you are climbing a mountain, and along the way you start to get hungry or thirsty. How cool would it be if you could just stop at a convenience store nearby, despite being high above the ground?
Climbers in Pingjiang, Hunan province, do not have to imagine this. For them, such a store built on a cliff is a reality.
The Shiniuzhai scenic area is famous for its towering cliffs, deep canyons and unique rock formations. It is also known for its glass-bottom bridge, one of the longest and highest glass bridges in the world.
Mr Song Huizhou, general manager of Shiniuzhai, said the 2 sq m convenience store there is built on a mountainside about 120m above the ground.
It was constructed in 2017 and opened a year later.
Spiny Norman said:
China’s ‘least convenient convenience store’ that juts out from a cliff offers relief to climbers.
CHANGSHA – Imagine you are climbing a mountain, and along the way you start to get hungry or thirsty. How cool would it be if you could just stop at a convenience store nearby, despite being high above the ground?
Climbers in Pingjiang, Hunan province, do not have to imagine this. For them, such a store built on a cliff is a reality.
The Shiniuzhai scenic area is famous for its towering cliffs, deep canyons and unique rock formations. It is also known for its glass-bottom bridge, one of the longest and highest glass bridges in the world.
Mr Song Huizhou, general manager of Shiniuzhai, said the 2 sq m convenience store there is built on a mountainside about 120m above the ground.
It was constructed in 2017 and opened a year later.
That structure doesn’t look terribly secure.
Spiny Norman said:
China’s ‘least convenient convenience store’ that juts out from a cliff offers relief to climbers.
CHANGSHA – Imagine you are climbing a mountain, and along the way you start to get hungry or thirsty. How cool would it be if you could just stop at a convenience store nearby, despite being high above the ground?
Climbers in Pingjiang, Hunan province, do not have to imagine this. For them, such a store built on a cliff is a reality.
The Shiniuzhai scenic area is famous for its towering cliffs, deep canyons and unique rock formations. It is also known for its glass-bottom bridge, one of the longest and highest glass bridges in the world.
Mr Song Huizhou, general manager of Shiniuzhai, said the 2 sq m convenience store there is built on a mountainside about 120m above the ground.
It was constructed in 2017 and opened a year later.
Gosh!
Spiny Norman said:
Weather Station Kurt was an automated weather outpost secretly established by Nazi Germany on the Labrador coast in Newfoundland in 1943, designed to provide critical meteorological data for military operations in the North Atlantic.Despite its brief operational life, Kurt showcased advanced technology with its autonomous functioning and sophisticated instruments for measuring temperature, wind, and atmospheric pressure.
Its discovery in 1977 by historian Selma Barkham shed light on the covert presence of German operations in North America during World War II and underscored the strategic importance of meteorological data in wartime.
The deployment of the German Weather Station Kurt was a clandestine operation of considerable complexity, demonstrating a blend of ingenuity and audacity. U-537, a Type IXC U-boat of the Kriegsmarine, had the unique distinction of being chosen for this task.
The submarine departed from its base in Norway carrying not only its crew but also a specialized team equipped to install the weather station. Their destination was a desolate, uninhabited stretch of the Labrador coast in Newfoundland, far from prying eyes, yet strategically positioned to fill a critical gap in the meteorological data network.
Upon reaching the coast of Labrador in October 1943, the crew, led by Kapitänleutnant Peter Schrewe, faced the daunting task of setting up the station under harsh weather conditions and with the constant threat of Allied detection. Their operation was not only a race against time but also against the elements. The installation had to be swift to minimize the risk of being discovered by the Allies, whose naval and air patrols were a continual danger.
The Weather Station Kurt remained lost to time and memory until its unexpected discovery in 1977, not by a military operation or a government expedition, but by a historian named Selma Barkham. Barkham was conducting research on the historical land use of the Labrador coast when she stumbled upon the weather station. The site, which had sat undisturbed for over three decades, was a veritable time capsule from World War II.
The discovery of Kurt was met with a mix of surprise and fascination. For many, it was the first tangible evidence of German military presence in North America, a sobering reminder that the war had reached far closer to home than previously believed. It provided historians with a rare artifact of the war’s secret battles—those fought with intelligence, information, and environmental data.
Huh!
TIL, ta.
Michael V said:
Spiny Norman said:
Weather Station Kurt was an automated weather outpost secretly established by Nazi Germany on the Labrador coast in Newfoundland in 1943, designed to provide critical meteorological data for military operations in the North Atlantic.
Despite its brief operational life, Kurt showcased advanced technology with its autonomous functioning and sophisticated instruments for measuring temperature, wind, and atmospheric pressure.
Its discovery in 1977 by historian Selma Barkham shed light on the covert presence of German operations in North America during World War II and underscored the strategic importance of meteorological data in wartime.
The deployment of the German Weather Station Kurt was a clandestine operation of considerable complexity, demonstrating a blend of ingenuity and audacity. U-537, a Type IXC U-boat of the Kriegsmarine, had the unique distinction of being chosen for this task.
The submarine departed from its base in Norway carrying not only its crew but also a specialized team equipped to install the weather station. Their destination was a desolate, uninhabited stretch of the Labrador coast in Newfoundland, far from prying eyes, yet strategically positioned to fill a critical gap in the meteorological data network.
Upon reaching the coast of Labrador in October 1943, the crew, led by Kapitänleutnant Peter Schrewe, faced the daunting task of setting up the station under harsh weather conditions and with the constant threat of Allied detection. Their operation was not only a race against time but also against the elements. The installation had to be swift to minimize the risk of being discovered by the Allies, whose naval and air patrols were a continual danger.
The Weather Station Kurt remained lost to time and memory until its unexpected discovery in 1977, not by a military operation or a government expedition, but by a historian named Selma Barkham. Barkham was conducting research on the historical land use of the Labrador coast when she stumbled upon the weather station. The site, which had sat undisturbed for over three decades, was a veritable time capsule from World War II.
The discovery of Kurt was met with a mix of surprise and fascination. For many, it was the first tangible evidence of German military presence in North America, a sobering reminder that the war had reached far closer to home than previously believed. It provided historians with a rare artifact of the war’s secret battles—those fought with intelligence, information, and environmental data.
Huh!
TIL, ta.
Now Find MH370
Muhamed the Mathematical Horse | Tales From the Bottle.
Can Mud ACTUALLY hide you from Predator*???
I put this here because maybe Spiny will read it and possibly have an answer.
Was watching this video, Why NASA Relies On A 1950’s Aircraft Design To Track 21st Century Spacecraft
Because I was always interested in the Canberra.
and at about 9:57 from a 13:21 minute video I spotted this image:
Now I am wondering what the NASA scientists were using Methyl Bromide for at high altitudes?
roughbarked said:
I put this here because maybe Spiny will read it and possibly have an answer.Was watching this video, Why NASA Relies On A 1950’s Aircraft Design To Track 21st Century Spacecraft
Because I was always interested in the Canberra.
and at about 9:57 from a 13:21 minute video I spotted this image:
Now I am wondering what the NASA scientists were using Methyl Bromide for at high altitudes?
Chem trails ?
Cymek said:
roughbarked said:
I put this here because maybe Spiny will read it and possibly have an answer.Was watching this video, Why NASA Relies On A 1950’s Aircraft Design To Track 21st Century Spacecraft
Because I was always interested in the Canberra.
and at about 9:57 from a 13:21 minute video I spotted this image:
Now I am wondering what the NASA scientists were using Methyl Bromide for at high altitudes?
Chem trails ?
Now there’s a thought. ;)
roughbarked said:
I put this here because maybe Spiny will read it and possibly have an answer.Was watching this video, Why NASA Relies On A 1950’s Aircraft Design To Track 21st Century Spacecraft
Because I was always interested in the Canberra.
and at about 9:57 from a 13:21 minute video I spotted this image:
Now I am wondering what the NASA scientists were using Methyl Bromide for at high altitudes?
maybe fire extinguisher.
JudgeMental said:
roughbarked said:
I put this here because maybe Spiny will read it and possibly have an answer.Was watching this video, Why NASA Relies On A 1950’s Aircraft Design To Track 21st Century Spacecraft
Because I was always interested in the Canberra.
and at about 9:57 from a 13:21 minute video I spotted this image:
Now I am wondering what the NASA scientists were using Methyl Bromide for at high altitudes?
maybe fire extinguisher.
Bromomethane was once used in specialty fire extinguishers, prior to the advent of less toxic halons, as it is electrically non-conductive and leaves no residue. It was used primarily for electrical substations, military aircraft, and other industrial hazards. It was never as popular as other agents due to its high cost and toxicity. Bromomethane was used from the 1920s to the 1960s, and continued to be used in aircraft engine fire suppression systems into the late 1960s.
wiki
roughbarked said:
I put this here because maybe Spiny will read it and possibly have an answer.Was watching this video, Why NASA Relies On A 1950’s Aircraft Design To Track 21st Century Spacecraft
Because I was always interested in the Canberra.
and at about 9:57 from a 13:21 minute video I spotted this image:
Now I am wondering what the NASA scientists were using Methyl Bromide for at high altitudes?
“Bromomethane was once used in specialty fire extinguishers, prior to the advent of less toxic halons, as it is electrically non-conductive and leaves no residue. It was used primarily for electrical substations, military aircraft, and other industrial hazards. It was never as popular as other agents due to its high cost and toxicity. Bromomethane was used from the 1920s to the 1960s, and continued to be used in aircraft engine fire suppression systems into the late 1960s.”
https://en.wikipedia.org/wiki/Bromomethane
Michael V said:
JudgeMental said:
JudgeMental said:
roughbarked said:
I put this here because maybe Spiny will read it and possibly have an answer.
Was watching this video, Why NASA Relies On A 1950’s Aircraft Design To Track 21st Century Spacecraft
Because I was always interested in the Canberra.
and at about 9:57 from a 13:21 minute video I spotted this image:
Now I am wondering what the NASA scientists were using Methyl Bromide for at high altitudes?
maybe fire extinguisher.
Bromomethane was once used in specialty fire extinguishers, prior to the advent of less toxic halons, as it is electrically non-conductive and leaves no residue. It was used primarily for electrical substations, military aircraft, and other industrial hazards. It was never as popular as other agents due to its high cost and toxicity. Bromomethane was used from the 1920s to the 1960s, and continued to be used in aircraft engine fire suppression systems into the late 1960s.
wiki
“Bromomethane was once used in specialty fire extinguishers, prior to the advent of less toxic halons, as it is electrically non-conductive and leaves no residue. It was used primarily for electrical substations, military aircraft, and other industrial hazards. It was never as popular as other agents due to its high cost and toxicity. Bromomethane was used from the 1920s to the 1960s, and continued to be used in aircraft engine fire suppression systems into the late 1960s.”
Many people use slash are bromides at high altitude.
roughbarked said:
I put this here because maybe Spiny will read it and possibly have an answer.Was watching this video, Why NASA Relies On A 1950’s Aircraft Design To Track 21st Century Spacecraft
Because I was always interested in the Canberra.
and at about 9:57 from a 13:21 minute video I spotted this image:
Now I am wondering what the NASA scientists were using Methyl Bromide for at high altitudes?
I think I used to go out with Methyl Bromide.
No, wait, that was Ethel.
Kingy said:
roughbarked said:
I put this here because maybe Spiny will read it and possibly have an answer.Was watching this video, Why NASA Relies On A 1950’s Aircraft Design To Track 21st Century Spacecraft
Because I was always interested in the Canberra.
and at about 9:57 from a 13:21 minute video I spotted this image:
Now I am wondering what the NASA scientists were using Methyl Bromide for at high altitudes?
I think I used to go out with Methyl Bromide.
No, wait, that was Ethel.
I was wondering why they were flying actresses at high altitudes, but, no, that was Methyl Streep.
captain_spalding said:
Kingy said:
roughbarked said:
I put this here because maybe Spiny will read it and possibly have an answer.Was watching this video, Why NASA Relies On A 1950’s Aircraft Design To Track 21st Century Spacecraft
Because I was always interested in the Canberra.
and at about 9:57 from a 13:21 minute video I spotted this image:
Now I am wondering what the NASA scientists were using Methyl Bromide for at high altitudes?
I think I used to go out with Methyl Bromide.
No, wait, that was Ethel.
I was wondering why they were flying actresses at high altitudes, but, no, that was Methyl Streep.
JudgeMental said:
roughbarked said:
I put this here because maybe Spiny will read it and possibly have an answer.Was watching this video, Why NASA Relies On A 1950’s Aircraft Design To Track 21st Century Spacecraft
Because I was always interested in the Canberra.
and at about 9:57 from a 13:21 minute video I spotted this image:
Now I am wondering what the NASA scientists were using Methyl Bromide for at high altitudes?
maybe fire extinguisher.
That might work.
JudgeMental said:
JudgeMental said:
roughbarked said:
I put this here because maybe Spiny will read it and possibly have an answer.Was watching this video, Why NASA Relies On A 1950’s Aircraft Design To Track 21st Century Spacecraft
Because I was always interested in the Canberra.
and at about 9:57 from a 13:21 minute video I spotted this image:
Now I am wondering what the NASA scientists were using Methyl Bromide for at high altitudes?
maybe fire extinguisher.
Bromomethane was once used in specialty fire extinguishers, prior to the advent of less toxic halons, as it is electrically non-conductive and leaves no residue. It was used primarily for electrical substations, military aircraft, and other industrial hazards. It was never as popular as other agents due to its high cost and toxicity. Bromomethane was used from the 1920s to the 1960s, and continued to be used in aircraft engine fire suppression systems into the late 1960s.
wiki
Thanks.
Michael V said:
roughbarked said:
I put this here because maybe Spiny will read it and possibly have an answer.Was watching this video, Why NASA Relies On A 1950’s Aircraft Design To Track 21st Century Spacecraft
Because I was always interested in the Canberra.
and at about 9:57 from a 13:21 minute video I spotted this image:
Now I am wondering what the NASA scientists were using Methyl Bromide for at high altitudes?
“Bromomethane was once used in specialty fire extinguishers, prior to the advent of less toxic halons, as it is electrically non-conductive and leaves no residue. It was used primarily for electrical substations, military aircraft, and other industrial hazards. It was never as popular as other agents due to its high cost and toxicity. Bromomethane was used from the 1920s to the 1960s, and continued to be used in aircraft engine fire suppression systems into the late 1960s.”
https://en.wikipedia.org/wiki/Bromomethane
Well that’s something I’ve not seen before. The only fire extinguishers I’ve ever seen in aviation are the halon or BCF types. They also deplete the ozone layer but when the airline industry was ordered to go ozone-friendly there was nothing that was as effective, so they stuck with what they had.
Spiny Norman said:
Well that’s something I’ve not seen before. The only fire extinguishers I’ve ever seen in aviation are the halon or BCF types. They also deplete the ozone layer but when the airline industry was ordered to go ozone-friendly there was nothing that was as effective, so they stuck with what they had.
thanks.
Just watching this video from one of my fave YT channels.
Such a large rotating space station, to create artificial gravity, would have to have the axis of rotation aligned with the Earth’s axis of rotation so the stations attitude would stay the same reference to the Earth all the time?
The Last Thing To Ever Happen In The Universe.
Kurzgesagt – In a Nutshell.
Hey, Bill, here’s one for you:
https://www.boredpanda.com/crazy-things-airline-industry/
although you may have heard of them before this.
NASA | Sarychev Volcano Eruption from the International Space Station.
The SR-72 is REAL — And we can prove it/
Sandboxx with Alex Hollings.
Clearest images ever taken of Equatorial Ridge on Saturn’s moon ‘Iapetus’.
Spiny Norman said:
Clearest images ever taken of Equatorial Ridge on Saturn’s moon ‘Iapetus’.
Weird
dv said:
Spiny Norman said:
Clearest images ever taken of Equatorial Ridge on Saturn’s moon ‘Iapetus’.
Weird
Someone suggested that it was just some casting flash.
Sounds plausible.
Spiny Norman said:
dv said:
Spiny Norman said:
Clearest images ever taken of Equatorial Ridge on Saturn’s moon ‘Iapetus’.
Weird
Someone suggested that it was just some casting flash.
Sounds plausible.
I was going to suggest that someone forgot to smooth down their weld.
dv said:
Spiny Norman said:
Clearest images ever taken of Equatorial Ridge on Saturn’s moon ‘Iapetus’.
Weird
Might be good for a celestial cricket game.
captain_spalding said:
Spiny Norman said:
dv said:Weird
Someone suggested that it was just some casting flash.
Sounds plausible.
I was going to suggest that someone forgot to smooth down their weld.
Yeah, I mean it’s going out to Saturn.
Who’s going to see it there?
Great Red Spot for scale.
FYI, the Great Red Spot is a persistent high-pressure
region in Jupiter, producing an anticyclonic storm
that is the largest in the Solar System.
Basically it is a never ending hurricane triple the
size of 688865446789631134 elephants aligned
with 225690009912487544 salt water crocodiles
and 3 bananas.
The wind speed around the eye of the storm reaches
432 km/h, or 50 Florida houses destroyed per second.
JudgeMental said:
Great Red Spot for scale.
FYI, the Great Red Spot is a persistent high-pressure
region in Jupiter, producing an anticyclonic storm
that is the largest in the Solar System.Basically it is a never ending hurricane triple the
size of 688865446789631134 elephants aligned
with 225690009912487544 salt water crocodiles
and 3 bananas.The wind speed around the eye of the storm reaches
432 km/h, or 50 Florida houses destroyed per second.
Good luck getting insurance against that.
Spiny Norman said:
The SR-72 is REAL — And we can prove it/
Sandboxx with Alex Hollings.
I’ve seen that video a couple of times.
dv said:
Spiny Norman said:
Clearest images ever taken of Equatorial Ridge on Saturn’s moon ‘Iapetus’.
Weird
Looks like it was cast like a lead sinker.
Michael V said:
dv said:
Spiny Norman said:
Clearest images ever taken of Equatorial Ridge on Saturn’s moon ‘Iapetus’.
Weird
Might be good for a celestial cricket game.
More like Bocce.
Spiny Norman said:
The SR-72 is REAL — And we can prove it/
Sandboxx with Alex Hollings.
Believe it when I see it.
JudgeMental said:
Spiny Norman said:
The SR-72 is REAL — And we can prove it/
Sandboxx with Alex Hollings.Believe it when I see it.
I doubt that will ever happen.
roughbarked said:
JudgeMental said:
Spiny Norman said:
The SR-72 is REAL — And we can prove it/
Sandboxx with Alex Hollings.Believe it when I see it.
I doubt that will ever happen.
No, they are invisible.
JudgeMental said:
Spiny Norman said:
The SR-72 is REAL — And we can prove it/
Sandboxx with Alex Hollings.Believe it when I see it.
It seems unlikely that, if it does exist, its appearance is anything like that.
Before the F-117 Nighthawk was made public, there was all sorts of speculation about what it looked like.
All of them (most assuming that it’d be named the ‘F-19’) were based on it being a sleek, thin aircraft, everything rounded off, with as few corners and ridges as possible, and quite probably not vertical or dihedral surfaces.
So, the F-117’s actual humped, angular appearance took everyone quite by surprise.
Spiny Norman said:
Clearest images ever taken of Equatorial Ridge on Saturn’s moon ‘Iapetus’.
The best explanation that I’ve heard that Iapetus once had a ring like Saturn, but being small and low gravity, as the ring slowly lost momentum, the particles in it gradually touched down into a pile along the line of the ring creating a ridge.
Kingy said:
Spiny Norman said:
Clearest images ever taken of Equatorial Ridge on Saturn’s moon ‘Iapetus’.
The best explanation that I’ve heard that Iapetus once had a ring like Saturn, but being small and low gravity, as the ring slowly lost momentum, the particles in it gradually touched down into a pile along the line of the ring creating a ridge.
https://en.wikipedia.org/wiki/Equatorial_ridge_on_Iapetus
The octopus, a most remarkable creature.
Spiny Norman said:
The octopus, a most remarkable creature.
Ta.
Have you been to “Rex’s Hangar?”:
Chris a.k.a “Rex” likes to talk about planes. A lot.
The Twelve-Gun “Twin-Engine Spitfires” | Supermarine 324, 325, 327
roughbarked said:
Spiny Norman said:
The octopus, a most remarkable creature.Ta. Have you been to “Rex’s Hangar?”:
Chrisa.k.a “Rex”likes to talk about planes. A lot.The Twelve-Gun “Twin-Engine Spitfires” | Supermarine 324, 325, 327
By coincidence, i was messing around with AI imaging a few weeks back, trying to get it to visualise a twin-engine Spitfire (it was hopeless).
I wasn’t aware that it had actually been given consideration in the 1930s. But then, in some ways it’s no surprise. There was a fad then for designs for long-range (usually twin-engine) ‘escort’/‘zerstorer fighters, like the Me110 and the Fokker G.1.
captain_spalding said:
roughbarked said:
Spiny Norman said:
The octopus, a most remarkable creature.Ta. Have you been to “Rex’s Hangar?”:
Chrisa.k.a “Rex”likes to talk about planes. A lot.The Twelve-Gun “Twin-Engine Spitfires” | Supermarine 324, 325, 327
By coincidence, i was messing around with AI imaging a few weeks back, trying to get it to visualise a twin-engine Spitfire (it was hopeless).
I wasn’t aware that it had actually been given consideration in the 1930s. But then, in some ways it’s no surprise. There was a fad then for designs for long-range (usually twin-engine) ‘escort’/‘zerstorer fighters, like the Me110 and the Fokker G.1.
We ended up with De Havilland’s Mosquito and the Hawker Typhoon/Tempest.
roughbarked said:
captain_spalding said:
roughbarked said:Ta. Have you been to “Rex’s Hangar?”:
Chrisa.k.a “Rex”likes to talk about planes. A lot.The Twelve-Gun “Twin-Engine Spitfires” | Supermarine 324, 325, 327
By coincidence, i was messing around with AI imaging a few weeks back, trying to get it to visualise a twin-engine Spitfire (it was hopeless).
I wasn’t aware that it had actually been given consideration in the 1930s. But then, in some ways it’s no surprise. There was a fad then for designs for long-range (usually twin-engine) ‘escort’/‘zerstorer fighters, like the Me110 and the Fokker G.1.
We ended up with De Havilland’s Mosquito and the Hawker Typhoon/Tempest.
The British made some fine planes during WW2 including those 3.
Peak Warming Man said:
roughbarked said:
captain_spalding said:By coincidence, i was messing around with AI imaging a few weeks back, trying to get it to visualise a twin-engine Spitfire (it was hopeless).
I wasn’t aware that it had actually been given consideration in the 1930s. But then, in some ways it’s no surprise. There was a fad then for designs for long-range (usually twin-engine) ‘escort’/‘zerstorer fighters, like the Me110 and the Fokker G.1.
We ended up with De Havilland’s Mosquito and the Hawker Typhoon/Tempest.
The British made some fine planes during WW2 including those 3.
Ye spealeth of great truths.
Peak Warming Man said:
roughbarked said:
captain_spalding said:By coincidence, i was messing around with AI imaging a few weeks back, trying to get it to visualise a twin-engine Spitfire (it was hopeless).
I wasn’t aware that it had actually been given consideration in the 1930s. But then, in some ways it’s no surprise. There was a fad then for designs for long-range (usually twin-engine) ‘escort’/‘zerstorer fighters, like the Me110 and the Fokker G.1.
We ended up with De Havilland’s Mosquito and the Hawker Typhoon/Tempest.
The British made some fine planes during WW2 including those 3.
They could have done a better job with some.
Like the Westland Whirlwind.
Like a lot of promising designs, it seems to have been handicapped by its engines, in this case Rolls-Royce Peregrines, which had lots of troubles. So, less than 120 were built.
With Merlin engines, especially with ‘handed’ props, who knows? It might have been a world-beater.
roughbarked said:
Peak Warming Man said:
roughbarked said:We ended up with De Havilland’s Mosquito and the Hawker Typhoon/Tempest.
The British made some fine planes during WW2 including those 3.
Ye spealeth of great truths.
l=k
captain_spalding said:
Peak Warming Man said:
roughbarked said:We ended up with De Havilland’s Mosquito and the Hawker Typhoon/Tempest.
The British made some fine planes during WW2 including those 3.
They could have done a better job with some.
Like the Westland Whirlwind.
Like a lot of promising designs, it seems to have been handicapped by its engines, in this case Rolls-Royce Peregrines, which had lots of troubles. So, less than 120 were built.
With Merlin engines, especially with ‘handed’ props, who knows? It might have been a world-beater.
That was a special that needed a bit of time to develop better. Unfortunately the speed at which wartime tech develops, things do tend to get left behind when they shouldn’t have.
captain_spalding said:
Peak Warming Man said:
roughbarked said:We ended up with De Havilland’s Mosquito and the Hawker Typhoon/Tempest.
The British made some fine planes during WW2 including those 3.
They could have done a better job with some.
Like the Westland Whirlwind.
Like a lot of promising designs, it seems to have been handicapped by its engines, in this case Rolls-Royce Peregrines, which had lots of troubles. So, less than 120 were built.
With Merlin engines, especially with ‘handed’ props, who knows? It might have been a world-beater.
How did the hand the props, with gearing I guess.
Could you hand the engines?
Peak Warming Man said:
captain_spalding said:
Peak Warming Man said:The British made some fine planes during WW2 including those 3.
They could have done a better job with some.
Like the Westland Whirlwind.
Like a lot of promising designs, it seems to have been handicapped by its engines, in this case Rolls-Royce Peregrines, which had lots of troubles. So, less than 120 were built.
With Merlin engines, especially with ‘handed’ props, who knows? It might have been a world-beater.
How did the hand the props, with gearing I guess.
Could you hand the engines?
Yep. I forget which marques of Merlins rotated the opposite way but they certainly existed. For a lightweight fighter like that they quite possibly wouldn’t have bothered though.
Spiny Norman said:
Peak Warming Man said:
captain_spalding said:They could have done a better job with some.
Like the Westland Whirlwind.
Like a lot of promising designs, it seems to have been handicapped by its engines, in this case Rolls-Royce Peregrines, which had lots of troubles. So, less than 120 were built.
With Merlin engines, especially with ‘handed’ props, who knows? It might have been a world-beater.
How did the hand the props, with gearing I guess.
Could you hand the engines?
Yep. I forget which marques of Merlins rotated the opposite way but they certainly existed. For a lightweight fighter like that they quite possibly wouldn’t have bothered though.
I knew that they could be made like that, but this wiki paragraph explains it concisely:
‘Drawbacks of counter-rotating propellers come from the fact that, in order to reverse the rotation of one propeller, either one propeller must have an additional reversing gearbox, or the engines themselves must be adapted to turn in opposite directions. (Meaning that there are essentially two engine designs, one with left-turning and the other with right-turning parts, which complicates manufacture and maintenance.)’
captain_spalding said:
Spiny Norman said:
Peak Warming Man said:How did the hand the props, with gearing I guess.
Could you hand the engines?
Yep. I forget which marques of Merlins rotated the opposite way but they certainly existed. For a lightweight fighter like that they quite possibly wouldn’t have bothered though.
I knew that they could be made like that, but this wiki paragraph explains it concisely:
‘Drawbacks of counter-rotating propellers come from the fact that, in order to reverse the rotation of one propeller, either one propeller must have an additional reversing gearbox, or the engines themselves must be adapted to turn in opposite directions. (Meaning that there are essentially two engine designs, one with left-turning and the other with right-turning parts, which complicates manufacture and maintenance.)’
They would otherwise have been a good weapons platform.
captain_spalding said:
Spiny Norman said:
Peak Warming Man said:How did the hand the props, with gearing I guess.
Could you hand the engines?
Yep. I forget which marques of Merlins rotated the opposite way but they certainly existed. For a lightweight fighter like that they quite possibly wouldn’t have bothered though.
I knew that they could be made like that, but this wiki paragraph explains it concisely:
‘Drawbacks of counter-rotating propellers come from the fact that, in order to reverse the rotation of one propeller, either one propeller must have an additional reversing gearbox, or the engines themselves must be adapted to turn in opposite directions. (Meaning that there are essentially two engine designs, one with left-turning and the other with right-turning parts, which complicates manufacture and maintenance.)’
It’s not that difficult, just different (mirrored) camshafts and maybe a bit of tweaking of the oil system.
captain_spalding said:
Spiny Norman said:
Peak Warming Man said:How did the hand the props, with gearing I guess.
Could you hand the engines?
Yep. I forget which marques of Merlins rotated the opposite way but they certainly existed. For a lightweight fighter like that they quite possibly wouldn’t have bothered though.
I knew that they could be made like that, but this wiki paragraph explains it concisely:
‘Drawbacks of counter-rotating propellers come from the fact that, in order to reverse the rotation of one propeller, either one propeller must have an additional reversing gearbox, or the engines themselves must be adapted to turn in opposite directions. (Meaning that there are essentially two engine designs, one with left-turning and the other with right-turning parts, which complicates manufacture and maintenance.)’
I can imagine the maintenance cockups.
Peak Warming Man said:
captain_spalding said:
Spiny Norman said:Yep. I forget which marques of Merlins rotated the opposite way but they certainly existed. For a lightweight fighter like that they quite possibly wouldn’t have bothered though.
I knew that they could be made like that, but this wiki paragraph explains it concisely:
‘Drawbacks of counter-rotating propellers come from the fact that, in order to reverse the rotation of one propeller, either one propeller must have an additional reversing gearbox, or the engines themselves must be adapted to turn in opposite directions. (Meaning that there are essentially two engine designs, one with left-turning and the other with right-turning parts, which complicates manufacture and maintenance.)’
I can imagine the maintenance cockups.
New bloke on the job would be like asking him to find the left handed screwdriver.
roughbarked said:
captain_spalding said:
Spiny Norman said:Yep. I forget which marques of Merlins rotated the opposite way but they certainly existed. For a lightweight fighter like that they quite possibly wouldn’t have bothered though.
I knew that they could be made like that, but this wiki paragraph explains it concisely:
‘Drawbacks of counter-rotating propellers come from the fact that, in order to reverse the rotation of one propeller, either one propeller must have an additional reversing gearbox, or the engines themselves must be adapted to turn in opposite directions. (Meaning that there are essentially two engine designs, one with left-turning and the other with right-turning parts, which complicates manufacture and maintenance.)’
They would otherwise have been a good weapons platform.
The few that were made apparently did dreadful damage to German organisation and transport in France, with a usual armament of four nose-mounted 20mm cannon giving a devastating concentrated cone of fire.
I believe that one was experimentally given sixteen .303 machine guns in its nose. Would not have cared to be the armourer for that aircraft.
Peak Warming Man said:
roughbarked said:
captain_spalding said:By coincidence, i was messing around with AI imaging a few weeks back, trying to get it to visualise a twin-engine Spitfire (it was hopeless).
I wasn’t aware that it had actually been given consideration in the 1930s. But then, in some ways it’s no surprise. There was a fad then for designs for long-range (usually twin-engine) ‘escort’/‘zerstorer fighters, like the Me110 and the Fokker G.1.
We ended up with De Havilland’s Mosquito and the Hawker Typhoon/Tempest.
The British made some fine planes during WW2 including those 3.
beaufighter was another.
captain_spalding said:
roughbarked said:
captain_spalding said:I knew that they could be made like that, but this wiki paragraph explains it concisely:
‘Drawbacks of counter-rotating propellers come from the fact that, in order to reverse the rotation of one propeller, either one propeller must have an additional reversing gearbox, or the engines themselves must be adapted to turn in opposite directions. (Meaning that there are essentially two engine designs, one with left-turning and the other with right-turning parts, which complicates manufacture and maintenance.)’
They would otherwise have been a good weapons platform.
The few that were made apparently did dreadful damage to German organisation and transport in France, with a usual armament of four nose-mounted 20mm cannon giving a devastating concentrated cone of fire.
I believe that one was experimentally given sixteen .303 machine guns in its nose. Would not have cared to be the armourer for that aircraft.
Sounds like an explosive nightmare of tangling belts.
JudgeMental said:
Peak Warming Man said:
roughbarked said:We ended up with De Havilland’s Mosquito and the Hawker Typhoon/Tempest.
The British made some fine planes during WW2 including those 3.
beaufighter was another.
Bristol’s silent maraurderer.
roughbarked said:
JudgeMental said:
Peak Warming Man said:The British made some fine planes during WW2 including those 3.
beaufighter was another.
Bristol’s silent maraurderer.
Captain Bigglesworth’s fave plane of WWII
roughbarked said:
captain_spalding said:
roughbarked said:They would otherwise have been a good weapons platform.
The few that were made apparently did dreadful damage to German organisation and transport in France, with a usual armament of four nose-mounted 20mm cannon giving a devastating concentrated cone of fire.
I believe that one was experimentally given sixteen .303 machine guns in its nose. Would not have cared to be the armourer for that aircraft.
Sounds like an explosive nightmare of tangling belts.
No, it was all disintegrating links, passed through feed troughs from ammunition boxes.
You couldn’t use the cloth ammunition belts. Where would the ‘empty’ belts pile up in the noses and wings of aircraft?
captain_spalding said:
roughbarked said:
captain_spalding said:The few that were made apparently did dreadful damage to German organisation and transport in France, with a usual armament of four nose-mounted 20mm cannon giving a devastating concentrated cone of fire.
I believe that one was experimentally given sixteen .303 machine guns in its nose. Would not have cared to be the armourer for that aircraft.
Sounds like an explosive nightmare of tangling belts.
No, it was all disintegrating links, passed through feed troughs from ammunition boxes.
You couldn’t use the cloth ammunition belts. Where would the ‘empty’ belts pile up in the noses and wings of aircraft?
A serious nightmare.
captain_spalding said:
roughbarked said:
captain_spalding said:The few that were made apparently did dreadful damage to German organisation and transport in France, with a usual armament of four nose-mounted 20mm cannon giving a devastating concentrated cone of fire.
I believe that one was experimentally given sixteen .303 machine guns in its nose. Would not have cared to be the armourer for that aircraft.
Sounds like an explosive nightmare of tangling belts.
No, it was all disintegrating links, passed through feed troughs from ammunition boxes.
You couldn’t use the cloth ammunition belts. Where would the ‘empty’ belts pile up in the noses and wings of aircraft?
FWIW a few of the more modern aircraft, the A-10 for one, retain the spend cartridges onboard to help them maintain the centre of gravity within limits.
Spiny Norman said:
captain_spalding said:
roughbarked said:Sounds like an explosive nightmare of tangling belts.
No, it was all disintegrating links, passed through feed troughs from ammunition boxes.
You couldn’t use the cloth ammunition belts. Where would the ‘empty’ belts pile up in the noses and wings of aircraft?
FWIW a few of the more modern aircraft, the A-10 for one, retain the spend cartridges onboard to help them maintain the centre of gravity within limits.
smart planes.
Spiny Norman said:
captain_spalding said:
roughbarked said:Sounds like an explosive nightmare of tangling belts.
No, it was all disintegrating links, passed through feed troughs from ammunition boxes.
You couldn’t use the cloth ammunition belts. Where would the ‘empty’ belts pile up in the noses and wings of aircraft?
FWIW a few of the more modern aircraft, the A-10 for one, retain the spend cartridges onboard to help them maintain the centre of gravity within limits.
More useless trivia – A lot of the jets that have the gun ports in front of the air inlets have to have a ‘fuel bumping’ system. It’s because quite often when the guns are fired it cuts down on the oxygen that the engines are sucking so they can sometimes actually flame-out.
That’s bad.
So a system that reduces the fuel flow when the guns are fired is used so there’s a short dip in power instead of a bit one for longer. Trying an engine restart when getting shot at pretty much guarantees a very bad day.
Spiny Norman said:
Spiny Norman said:
captain_spalding said:No, it was all disintegrating links, passed through feed troughs from ammunition boxes.
You couldn’t use the cloth ammunition belts. Where would the ‘empty’ belts pile up in the noses and wings of aircraft?
FWIW a few of the more modern aircraft, the A-10 for one, retain the spend cartridges onboard to help them maintain the centre of gravity within limits.
More useless trivia – A lot of the jets that have the gun ports in front of the air inlets have to have a ‘fuel bumping’ system. It’s because quite often when the guns are fired it cuts down on the oxygen that the engines are sucking so they can sometimes actually flame-out.
That’s bad.
So a system that reduces the fuel flow when the guns are fired is used so there’s a short dip in power instead of a bit one for longer. Trying an engine restart when getting shot at pretty much guarantees a very bad day.
_)
Hawker Hunters, back in the 1950s, had to have ‘blisters’ attached to the fuselage to retain expended cartridge cases, so that they weren’t accidentally ingested into the jet engine’s air intake, or do damage to the rear fuselage. They’re easily seen on all Hunters, just below the wing-root intakes.
Sounds like a lot of modern combat aircraft would benefit from caseless rounds…
party_pants said:
Sounds like a lot of modern combat aircraft would benefit from caseless rounds…
An interesting idea. I wonder how it might, or might not, work.
I’m thinking of feed mechanism, for a start. A cased round gives something to which a feed link can be attached, to facilitate mechanical feed of cartridges. You’re not going to get a usable, big enough, gravity- or spring-fed system up there.
The other thing is environmental effects on caseless cartridges. If may be 32 deg down on the ground, but then its up to 10,000 metres, where it’s an awful lot colder, then down to 32 deg on the ground again. The composition of caseless rounds would have to be adaptable, without expansion and contraction under such variations.
captain_spalding said:
party_pants said:
Sounds like a lot of modern combat aircraft would benefit from caseless rounds…
An interesting idea. I wonder how it might, or might not, work.
I’m thinking of feed mechanism, for a start. A cased round gives something to which a feed link can be attached, to facilitate mechanical feed of cartridges. You’re not going to get a usable, big enough, gravity- or spring-fed system up there.
The other thing is environmental effects on caseless cartridges. If may be 32 deg down on the ground, but then its up to 10,000 metres, where it’s an awful lot colder, then down to 32 deg on the ground again. The composition of caseless rounds would have to be adaptable, without expansion and contraction under such variations.
So, what are these caseless rounds cased in?
Q* why AI that is “Good at Math” a “Threat to Humanity”?
The SAT Question Everyone Got Wrong.
Veritasium.
https://www.youtube.com/watch?v=FUHkTs-Ipfg
Bugger me!
Spiny Norman said:
The SAT Question Everyone Got Wrong.
Veritasium.https://www.youtube.com/watch?v=FUHkTs-Ipfg
Bugger me!
+1
Spiny Norman said:
The SAT Question Everyone Got Wrong.
Veritasium.https://www.youtube.com/watch?v=FUHkTs-Ipfg
Bugger me!
18 minutes?
No time for that today, and couldn’t see how to get the transcript.
Seen it before (or something similar).
The Rev Dodgson said:
Spiny Norman said:
The SAT Question Everyone Got Wrong.
Veritasium.https://www.youtube.com/watch?v=FUHkTs-Ipfg
Bugger me!
18 minutes?
No time for that today, and couldn’t see how to get the transcript.
Seen it before (or something similar).
The answer to the SAT question is none of the provided options, it’s 4!
The Rev Dodgson said:
Spiny Norman said:
The SAT Question Everyone Got Wrong.
Veritasium.https://www.youtube.com/watch?v=FUHkTs-Ipfg
Bugger me!
18 minutes?
No time for that today, and couldn’t see how to get the transcript.
Seen it before (or something similar).
1
00:00:00,000 —> 00:00:03,000
- In 1982, there was one SAT question
2
00:00:03,000 —> 00:00:06,000
that every single student got wrong.
3
00:00:06,000 —> 00:00:08,000
Here it is.
4
00:00:08,000 —> 00:00:09,000
In the figure above,
5
00:00:09,000 —> 00:00:13,000
the radius of circle A is
1/3 the radius of circle B.
6
00:00:13,000 —> 00:00:15,000
Starting from the position
shown in the figure,
7
00:00:15,000 —> 00:00:19,000
circle A rolls around circle B.
8
00:00:19,000 —> 00:00:22,000
At the end of how many
revolutions of circle A
9
00:00:22,000 —> 00:00:23,000
will the center
10
00:00:23,000 —> 00:00:27,000
of the circle first
reach its starting point.
11
00:00:27,000 —> 00:00:33,000
Is it A, 3/2, B, three, C, six,
12
00:00:33,000 —> 00:00:38,000
D, 9/2, or E, nine?
13
00:00:38,000 —> 00:00:40,000
SAT Questions are designed to be quick.
14
00:00:40,000 —> 00:00:43,000
This exam gave students 30
minutes to solve 25 problems,
15
00:00:43,000 —> 00:00:45,000
so about a minute each.
16
00:00:45,000 —> 00:00:50,000
So feel free to pause the
video here and try to solve it.
17
00:00:50,000 —> 00:00:53,000
What is your answer?
18
00:00:53,000 —> 00:00:55,000
I’ll tell you right now that option B,
19
00:00:55,000 —> 00:00:58,000
or three, is not correct.
20
00:00:58,000 —> 00:01:02,000
When I first saw this problem,
my intuitive answer was B,
21
00:01:02,000 —> 00:01:05,000
because the circumference of
a circle is just two pi r,
22
00:01:05,000 —> 00:01:10,000
and since the radius of
circle B is three times
23
00:01:10,000 —> 00:01:11,000
the radius of circle A,
24
00:01:11,000 —> 00:01:14,000
the circumference of circle
B must also be three times
25
00:01:14,000 —> 00:01:16,000
the circumference of circle A.
26
00:01:16,000 —> 00:01:19,000
So logically, it should
take three full rotations
27
00:01:19,000 —> 00:01:22,000
of circle A to roll around circle B.
28
00:01:22,000 —> 00:01:26,000
So my answer was three.
29
00:01:26,000 —> 00:01:34,000
This is wrong, but so are
answers A, C, D, and E.
30
00:01:34,000 —> 00:01:37,000
The reason no one got question 17 correct
31
00:01:37,000 —> 00:01:40,000
is that the test writers
themselves got it wrong.
32
00:01:40,000 —> 00:01:42,000
They also thought the answer was three.
33
00:01:42,000 —> 00:01:46,000
So the actual correct
answer was not listed
34
00:01:46,000 —> 00:01:50,000
as an option on the test.
35
00:01:50,000 —> 00:01:53,000
Mistakes like this aren’t
supposed to happen on the SAT.
36
00:01:53,000 —> 00:01:56,000
For decades, it was the one
exam every student had to take
37
00:01:56,000 —> 00:01:58,000
to go to college in the US.
38
00:01:58,000 —> 00:01:59,000
It had a reputation
39
00:01:59,000 —> 00:02:02,000
for determining people’s entire futures.
40
00:02:02,000 —> 00:02:04,000
As a newspaper from the time stated,
41
00:02:04,000 —> 00:02:07,000
“If you mess up on your SAT
tests, you can forget it.
42
00:02:07,000 —> 00:02:10,000
Your life as a productive citizen is over.
43
00:02:10,000 —> 00:02:13,000
Hang it up, son.”
44
00:02:13,000 —> 00:02:16,000
Of 300,000 test takers,
45
00:02:16,000 —> 00:02:18,000
just three students wrote about the error
46
00:02:18,000 —> 00:02:21,000
to the College Board, the
company that administers the SAT,
47
00:02:21,000 —> 00:02:27,000
Shivan Kartha, Bruce
Taub, and Doug Jungreis.
48
00:02:27,000 —> 00:02:30,000
- I did a lot of math
problems when I was young
49
00:02:30,000 —> 00:02:31,000
for the competitions.
50
00:02:31,000 —> 00:02:34,000
I probably did thousands of
math problems and I read it
51
00:02:34,000 —> 00:02:36,000
and I was amazed how badly it’s worded.
52
00:02:36,000 —> 00:02:39,000
I just put three down. I
figured that’s what they wanted.
53
00:02:39,000 —> 00:02:41,000
- The three
students were confident none
54
00:02:41,000 —> 00:02:43,000
of the listed answers were correct,
55
00:02:43,000 —> 00:02:44,000
and their letters showed it.
56
00:02:44,000 —> 00:02:47,000
As a director at the
testing service recalled,
57
00:02:47,000 —> 00:02:48,000
they didn’t say they had come up
58
00:02:48,000 —> 00:02:50,000
with possible alternative answers
59
00:02:50,000 —> 00:02:51,000
or that maybe we were wrong.
60
00:02:51,000 —> 00:02:55,000
They said flat out, “You’re
wrong,” and they proved it.
61
00:02:55,000 —> 00:02:58,000
- I discussed it with some
other people and said,
62
00:02:58,000 —> 00:03:01,000
I think there was a mistake,
and they mostly said,
63
00:03:01,000 —> 00:03:03,000
“No one cares.”
64
00:03:03,000 —> 00:03:07,000
I wrote a letter to the
Educational Testing Service.
65
00:03:07,000 —> 00:03:09,000
It was a little while later they called us
66
00:03:09,000 —> 00:03:12,000
and said I was correct.
67
00:03:12,000 —> 00:03:15,000
- Here is their argument.
68
00:03:15,000 —> 00:03:17,000
The simplest version of this problem
69
00:03:17,000 —> 00:03:19,000
is with two identical coins.
70
00:03:19,000 —> 00:03:22,000
These have the exact same circumference.
71
00:03:22,000 —> 00:03:24,000
So by our initial logic,
72
00:03:24,000 —> 00:03:26,000
this coin should rotate exactly once
73
00:03:26,000 —> 00:03:28,000
as it rolls around the other.
74
00:03:28,000 —> 00:03:30,000
So let’s try it.
75
00:03:30,000 —> 00:03:33,000
Okay.
76
00:03:33,000 —> 00:03:36,000
But wait, we can see it’s
already right side up
77
00:03:36,000 —> 00:03:37,000
at the halfway point.
78
00:03:37,000 —> 00:03:41,000
So if we finish rolling
it around the other coin,
79
00:03:41,000 —> 00:03:45,000
it’ll have rotated not once, but twice.
80
00:03:45,000 —> 00:03:48,000
Even though the coins
are the exact same size
81
00:03:48,000 —> 00:03:50,000
There are no tricks here,
82
00:03:50,000 —> 00:03:51,000
you can try it for yourself,
83
00:03:51,000 —> 00:03:56,000
and I’ll do it again slowly.
84
00:03:56,000 —> 00:04:03,000
That’s one,
85
00:04:03,000 —> 00:04:05,000
two.
86
00:04:05,000 —> 00:04:08,000
This is known as the
coin rotation paradox.
87
00:04:08,000 —> 00:04:12,000
This paradox also applies to question 17.
88
00:04:12,000 —> 00:04:16,000
I’ve made a to scale model of the problem.
89
00:04:16,000 —> 00:04:18,000
One useful tip for standardized tests,
90
00:04:18,000 —> 00:04:21,000
even though they say their
images are not to scale,
91
00:04:21,000 —> 00:04:24,000
they almost always are.
92
00:04:24,000 —> 00:04:28,000
So when we roll circle A around circle B,
93
00:04:28,000 —> 00:04:37,000
we can see that it rotates once, twice,
94
00:04:37,000 —> 00:04:44,000
three times, and four times in total.
95
00:04:44,000 —> 00:04:47,000
So the correct answer to this
question is actually four.
96
00:04:47,000 —> 00:04:50,000
Once again, the circle
rotates one more time
97
00:04:50,000 —> 00:04:51,000
than we expected.
98
00:04:51,000 —> 00:04:53,000
To understand this,
99
00:04:53,000 —> 00:05:00,000
let’s wrap this larger
circle in some ribbon
100
00:05:00,000 —> 00:05:04,000
And I’ll make it the same
length as the circumference,
101
00:05:04,000 —> 00:05:07,000
and then I will stick it down to the table
102
00:05:07,000 —> 00:05:09,000
as a straight line.
103
00:05:09,000 —> 00:05:12,000
I’m adding some paper here
104
00:05:12,000 —> 00:05:16,000
so there’s something for this to roll on.
105
00:05:16,000 —> 00:05:23,000
And now it rolls one, two, three times.
106
00:05:23,000 —> 00:05:25,000
What’s happening when we
turn this straight path
107
00:05:25,000 —> 00:05:28,000
into a circular one is that
circle A is now rolling
108
00:05:28,000 —> 00:05:29,000
the length of the circumference
109
00:05:29,000 —> 00:05:32,000
and it’s going around a circle.
110
00:05:32,000 —> 00:05:34,000
The shape of the circular path itself
111
00:05:34,000 —> 00:05:37,000
makes circle A do an additional rotation
112
00:05:37,000 —> 00:05:39,000
to return to its starting point.
113
00:05:39,000 —> 00:05:42,000
So this is the general
solution to the problem.
114
00:05:42,000 —> 00:05:45,000
Find the ratio between the
circumferences of circle B
115
00:05:45,000 —> 00:05:47,000
and circle A and then add one rotation
116
00:05:47,000 —> 00:05:52,000
to account for the circular path traveled.
117
00:05:52,000 —> 00:05:55,000
But there is a way to correctly get three.
118
00:05:55,000 —> 00:05:57,000
Let’s count the rotations of circle A
119
00:05:57,000 —> 00:06:00,000
from the perspective of
circle B looking out at A.
120
00:06:00,000 —> 00:06:11,000
We can see circle A rotates one, two,
121
00:06:11,000 —> 00:06:14,000
three times.
122
00:06:14,000 —> 00:06:16,000
And it doesn’t matter which
circle you are looking from,
123
00:06:16,000 —> 00:06:19,000
to circle A, it also rotates three times
124
00:06:19,000 —> 00:06:24,000
to come back to its starting
position around circle B.
125
00:06:24,000 —> 00:06:26,000
Similarly, from the
perspective of the coins,
126
00:06:26,000 —> 00:06:29,000
we can see that the outer
coin only rotates once
127
00:06:29,000 —> 00:06:33,000
as it rolls around the inner coin.
128
00:06:33,000 —> 00:06:34,000
Using the perspective of a circle
129
00:06:34,000 —> 00:06:36,000
is just like turning the
circle’s circumference
130
00:06:36,000 —> 00:06:39,000
into a straight line.
131
00:06:39,000 —> 00:06:41,000
It’s only as external observers
132
00:06:41,000 —> 00:06:43,000
that we actually see
the outer circle travel
133
00:06:43,000 —> 00:06:45,000
a circular path back
to its starting point,
134
00:06:45,000 —> 00:06:50,000
giving us the one extra rotation.
135
00:06:50,000 —> 00:06:56,000
But there’s even another answer.
136
00:06:56,000 —> 00:06:58,000
If you look closely at question 17,
137
00:06:58,000 —> 00:07:01,000
it asks how many
revolutions circle A makes
138
00:07:01,000 —> 00:07:05,000
as it rolls around circle B
back to its starting point.
139
00:07:05,000 —> 00:07:06,000
Now, in astronomy,
140
00:07:06,000 —> 00:07:08,000
the definition of a revolution is precise.
141
00:07:08,000 —> 00:07:12,000
It’s a complete orbit around another body.
142
00:07:12,000 —> 00:07:13,000
The earth revolves around the sun,
143
00:07:13,000 —> 00:07:16,000
which is different from it
rotating about its axis.
144
00:07:16,000 —> 00:07:19,000
So by the astronomical
definition of a revolution,
145
00:07:19,000 —> 00:07:23,000
circle A only revolves
around circle B once.
146
00:07:23,000 —> 00:07:26,000
It goes around one time.
147
00:07:26,000 —> 00:07:29,000
Now, other definitions of a
revolution do include the motion
148
00:07:29,000 —> 00:07:31,000
of an object rotating about its own axis.
149
00:07:31,000 —> 00:07:33,000
So one isn’t a definitive answer,
150
00:07:33,000 —> 00:07:37,000
but the wording of this
question is extremely ambiguous
151
00:07:37,000 —> 00:07:44,000
if you can justify at least
three different solutions.
152
00:07:44,000 —> 00:07:46,000
After reviewing the
letters from the students,
153
00:07:46,000 —> 00:07:48,000
the College Board publicly
admitted their mistake
154
00:07:48,000 —> 00:07:50,000
a few weeks later and
nullified the question
155
00:07:50,000 —> 00:07:53,000
for all test takers.
156
00:07:53,000 —> 00:07:54,000
- They said they were
discounting the problem
157
00:07:54,000 —> 00:07:56,000
and they were calling us
158
00:07:56,000 —> 00:07:58,000
because they were gonna tell the news
159
00:07:58,000 —> 00:08:00,000
and they thought that we should be warned
160
00:08:00,000 —> 00:08:03,000
that the news might contact us.
161
00:08:03,000 —> 00:08:06,000
I did a bunch of phone
interviews and NBC News,
162
00:08:06,000 —> 00:08:08,000
they came to my school.
163
00:08:08,000 —> 00:08:10,000
They said I was right and
they were discounting it.
164
00:08:10,000 —> 00:08:13,000
So that was great.
165
00:08:13,000 —> 00:08:15,000
- But there’s
more to the explanation.
166
00:08:15,000 —> 00:08:18,000
- It’s easy to get an intuitive reason,
167
00:08:18,000 —> 00:08:21,000
but it’s really hard to formally prove
168
00:08:21,000 —> 00:08:23,000
that the answer is four.
169
00:08:23,000 —> 00:08:25,000
I could give you some proofs if you want.
170
00:08:25,000 —> 00:08:26,000
- Well, that would be wonderful.
171
00:08:26,000 —> 00:08:29,000
I think that would be, we’d
appreciate that for sure.
172
00:08:29,000 —> 00:08:31,000
- I have a whiteboard
because I’m a mathematician,
173
00:08:31,000 —> 00:08:34,000
so I just happen to
have a whiteboard here.
174
00:08:34,000 —> 00:08:36,000
Hold on.
175
00:08:36,000 —> 00:08:39,000
Can you see that?
- Yep.
176
00:08:39,000 —> 00:08:42,000
- It turns out that the amount
the small circle rotates
177
00:08:42,000 —> 00:08:46,000
is always the same as the
distance the center travels.
178
00:08:46,000 —> 00:08:49,000
All right, so why is this true?
179
00:08:49,000 —> 00:08:50,000
Suppose you had a camera
180
00:08:50,000 —> 00:08:53,000
and the camera was always
pointed at the center.
181
00:08:53,000 —> 00:08:56,000
So in your movie, it looks
like the center doesn’t move.
182
00:08:56,000 —> 00:08:57,000
In the real world,
183
00:08:57,000 —> 00:08:59,000
the center is going around the circle.
184
00:08:59,000 —> 00:09:02,000
Let’s say it’s going at some speed V.
185
00:09:02,000 —> 00:09:04,000
What’s the velocity of this point?
186
00:09:04,000 —> 00:09:08,000
It’s zero, and that’s because
it’s rolling without slipping.
187
00:09:08,000 —> 00:09:11,000
If it had any component in that direction,
188
00:09:11,000 —> 00:09:13,000
that’s what slipping would be.
189
00:09:13,000 —> 00:09:14,000
I mean, this is something I think they
190
00:09:14,000 —> 00:09:15,000
should have spelled out in the problem,
191
00:09:15,000 —> 00:09:18,000
but when you change
your frame of reference,
192
00:09:18,000 —> 00:09:21,000
the relative velocities don’t change.
193
00:09:21,000 —> 00:09:24,000
In the movee, the center
always has velocity zero.
194
00:09:24,000 —> 00:09:28,000
So this point would have to
have velocity negative V.
195
00:09:28,000 —> 00:09:31,000
So that means the speed
that this is turning
196
00:09:31,000 —> 00:09:34,000
is the same as the speed
the center is moving.
197
00:09:34,000 —> 00:09:35,000
So if they always have the same speed,
198
00:09:35,000 —> 00:09:38,000
they have to go the same total distance.
199
00:09:38,000 —> 00:09:41,000
The total distance this
turns has to be the same
200
00:09:41,000 —> 00:09:44,000
as the total distance the center moves.
201
00:09:44,000 —> 00:09:45,000
In this problem,
202
00:09:45,000 —> 00:09:48,000
the center of the small
circle goes around a circle
203
00:09:48,000 —> 00:09:50,000
of radius four.
204
00:09:50,000 —> 00:09:55,000
So the total distance that
the center moves is eight pi.
205
00:09:55,000 —> 00:09:58,000
What’s the total amount that
the small circle rotates?
206
00:09:58,000 —> 00:10:02,000
It rotates four times, and
its circumference is two pi.
207
00:10:02,000 —> 00:10:03,000
It’s the same number.
208
00:10:03,000 —> 00:10:04,000
If it rolls without slipping,
209
00:10:04,000 —> 00:10:08,000
the total distance the
center travels is the same
210
00:10:08,000 —> 00:10:11,000
as the total amount it turns.
211
00:10:11,000 —> 00:10:14,000
- And this is always true.
212
00:10:14,000 —> 00:10:16,000
Take a circle rolling without
slipping on any surface
213
00:10:16,000 —> 00:10:22,000
from a polygon to a blob, on
the outside or the inside,
214
00:10:22,000 —> 00:10:24,000
the distance traveled by
the center of the circle
215
00:10:24,000 —> 00:10:27,000
is equal to the amount
the circle has rotated.
216
00:10:27,000 —> 00:10:29,000
So, just find this distance
217
00:10:29,000 —> 00:10:30,000
and divide it by the circle circumference
218
00:10:30,000 —> 00:10:33,000
to get how many rotations it’s made.
219
00:10:33,000 —> 00:10:35,000
This is an even more general
solution than our answer
220
00:10:35,000 —> 00:10:38,000
to the coin paradox where we
just took our expected answer,
221
00:10:38,000 —> 00:10:41,000
which we’ll call N, and added one,
222
00:10:41,000 —> 00:10:44,000
and it reveals where
this shortcut comes from.
223
00:10:44,000 —> 00:10:47,000
If a circle is rolling
continuously around a shape,
224
00:10:47,000 —> 00:10:50,000
the circle center goes around the outside,
225
00:10:50,000 —> 00:10:51,000
increasing its distance traveled
226
00:10:51,000 —> 00:10:54,000
by exactly one circumference of the circle
227
00:10:54,000 —> 00:10:56,000
so the distance traveled
by the circle center
228
00:10:56,000 —> 00:10:58,000
is just the perimeter of the shape
229
00:10:58,000 —> 00:11:00,000
plus the circle’s circumference.
230
00:11:00,000 —> 00:11:02,000
When we ultimately divide this
by the circle circumference
231
00:11:02,000 —> 00:11:07,000
to get the total number of
rotations, we get N plus one.
232
00:11:07,000 —> 00:11:10,000
If a circle is rolling
continuously within a shape,
233
00:11:10,000 —> 00:11:12,000
the distance travel by the
circle center decreases
234
00:11:12,000 —> 00:11:14,000
by one circumference of the circle,
235
00:11:14,000 —> 00:11:18,000
making the total number
of rotations N minus one.
236
00:11:18,000 —> 00:11:20,000
If the circle is rolling
along a flat line,
237
00:11:20,000 —> 00:11:22,000
the distance travel by the circle center
238
00:11:22,000 —> 00:11:24,000
is equal to the length of the line which,
239
00:11:24,000 —> 00:11:29,000
divided by the circle
circumference, is just N.
240
00:11:29,000 —> 00:11:31,000
This general principle extends far beyond
241
00:11:31,000 —> 00:11:32,000
a mathematical fun fact.
242
00:11:32,000 —> 00:11:34,000
In fact, it’s essential in astronomy
243
00:11:34,000 —> 00:11:37,000
for accurate timekeeping.
244
00:11:37,000 —> 00:11:40,000
When we count 365 days going by in a year,
245
00:11:40,000 —> 00:11:43,000
365.24, to be precise,
246
00:11:43,000 —> 00:11:46,000
we say we’re just counting
how many rotations
247
00:11:46,000 —> 00:11:48,000
the earth makes in one
orbit around the sun.
248
00:11:48,000 —> 00:11:50,000
But it’s not that simple.
249
00:11:50,000 —> 00:11:52,000
All this counting is
done from the perspective
250
00:11:52,000 —> 00:11:54,000
of you on earth.
251
00:11:54,000 —> 00:11:55,000
To an external observer,
252
00:11:55,000 —> 00:11:58,000
they’ll see the earth
do one extra rotation
253
00:11:58,000 —> 00:12:01,000
to account for its circular
path around the sun.
254
00:12:01,000 —> 00:12:05,000
So while we count 365.24 days in a year,
255
00:12:05,000 —> 00:12:10,000
they count 366.24 days in a year.
256
00:12:10,000 —> 00:12:12,000
This is called a Sidereal year,
257
00:12:12,000 —> 00:12:15,000
Sidereal meaning with respect to the stars
258
00:12:15,000 —> 00:12:18,000
where an external observer would be.
259
00:12:18,000 —> 00:12:22,000
But what happens to that one extra day?
260
00:12:22,000 —> 00:12:24,000
A normal solar day is
the time it takes the sun
261
00:12:24,000 —> 00:12:27,000
to be directly above you again on earth.
262
00:12:27,000 —> 00:12:29,000
But the earth isn’t just rotating,
263
00:12:29,000 —> 00:12:31,000
it’s orbiting the sun at the same time.
264
00:12:31,000 —> 00:12:34,000
So in a 24-hour solar day,
265
00:12:34,000 —> 00:12:37,000
earth actually has to
rotate more than 360 degrees
266
00:12:37,000 —> 00:12:40,000
in order to bring the sun
directly overhead again.
267
00:12:40,000 —> 00:12:44,000
But Earth’s orbit is
negligible to distant stars.
268
00:12:44,000 —> 00:12:46,000
To see a star directly overhead again,
269
00:12:46,000 —> 00:12:53,000
Earth just needs to rotate
exactly 360 degrees.
270
00:12:53,000 —> 00:12:55,000
So while it takes the sun exactly 24 hours
271
00:12:55,000 —> 00:13:00,000
to be directly above you again,
272
00:13:00,000 —> 00:13:03,000
a star at night takes
only 23 hours, 56 minutes,
273
00:13:03,000 —> 00:13:06,000
and four seconds to be above you again.
274
00:13:06,000 —> 00:13:09,000
That’s a Sidereal day.
275
00:13:09,000 —> 00:13:14,000
This explains where the extra
day goes in the Sidereal year.
276
00:13:14,000 —> 00:13:15,000
If we start a solar day
277
00:13:15,000 —> 00:13:18,000
and a Sidereal day at the same time,
278
00:13:18,000 —> 00:13:21,000
we’d see them slowly
diverge throughout the year.
279
00:13:21,000 —> 00:13:22,000
After six months,
280
00:13:22,000 —> 00:13:26,000
the Sidereal day would be 12
hours ahead of the solar day,
281
00:13:26,000 —> 00:13:29,000
meaning that noon would be midnight,
282
00:13:29,000 —> 00:13:30,000
and it would keep moving up
283
00:13:30,000 —> 00:13:34,000
until it’s finally one full
day ahead of the solar day,
284
00:13:34,000 —> 00:13:39,000
at which point a new
year and orbit begins.
285
00:13:39,000 —> 00:13:43,000
365.24 days that are each 24 hours long
286
00:13:43,000 —> 00:13:48,000
are equal to 366.24 days
that are each 23 hours,
287
00:13:48,000 —> 00:13:54,000
56 minutes, and four seconds long.
288
00:13:54,000 —> 00:13:57,000
So it makes no sense to
use Sidereal time on earth,
289
00:13:57,000 —> 00:13:58,000
because six months down the line,
290
00:13:58,000 —> 00:14:01,000
day and night would be completely swapped.
291
00:14:01,000 —> 00:14:04,000
But equally, it’s
useless to use solar time
292
00:14:04,000 —> 00:14:06,000
while tracking objects in space,
293
00:14:06,000 —> 00:14:09,000
because the region you’re
observing would shift between say,
294
00:14:09,000 —> 00:14:12,000
10:00 PM one night and
10:00 PM the next night.
295
00:14:12,000 —> 00:14:15,000
So instead, astronomers use Sidereal time
296
00:14:15,000 —> 00:14:17,000
for their telescopes to
ensure that they’re looking
297
00:14:17,000 —> 00:14:20,000
at the same region of space each night.
298
00:14:20,000 —> 00:14:22,000
And all geostationary satellites,
299
00:14:22,000 —> 00:14:24,000
like those used for
communication or navigation,
300
00:14:24,000 —> 00:14:26,000
they use Sidereal time
301
00:14:26,000 —> 00:14:31,000
to keep their orbits locked
with the Earth’s rotation.
302
00:14:31,000 —> 00:14:33,000
So the coin paradox actually
explains the difference
303
00:14:33,000 —> 00:14:36,000
between how we track time on earth
304
00:14:36,000 —> 00:14:43,000
and how we track time in the universe.
305
00:14:43,000 —> 00:14:47,000
The rescoring of the 1982
SAT wasn’t all good news.
306
00:14:47,000 —> 00:14:49,000
With question 17 scrapped,
307
00:14:49,000 —> 00:14:51,000
students’ scores were scaled without it,
308
00:14:51,000 —> 00:14:53,000
moving their final result up or down
309
00:14:53,000 —> 00:14:55,000
by 10 points out of 800.
310
00:14:55,000 —> 00:14:57,000
Now, while that doesn’t seem like much,
311
00:14:57,000 —> 00:14:59,000
some universities and scholarships
312
00:14:59,000 —> 00:15:01,000
use strict minimum test score cutoffs.
313
00:15:01,000 —> 00:15:05,000
And as one admissions expert
put it, “There are instances,
314
00:15:05,000 —> 00:15:07,000
even if we do not consider them justified,
315
00:15:07,000 —> 00:15:08,000
in which 10 points can have an impact
316
00:15:08,000 —> 00:15:11,000
on a person’s educational opportunities.
317
00:15:11,000 —> 00:15:13,000
It might not keep someone
out of law school,
318
00:15:13,000 —> 00:15:17,000
but it might affect which
one he could go to.”
319
00:15:17,000 —> 00:15:20,000
This mistake didn’t only
cost points off the exam.
320
00:15:20,000 —> 00:15:21,000
According to the testing service,
321
00:15:21,000 —> 00:15:24,000
“Rescoring would cost them over $100,000,
322
00:15:24,000 —> 00:15:29,000
money that came outta the
pockets of test takers.
323
00:15:29,000 —> 00:15:32,000
The question 17 circle problem
was far from the last error
324
00:15:32,000 —> 00:15:35,000
on the SAT.
325
00:15:35,000 —> 00:15:37,000
But errors are likely
326
00:15:37,000 —> 00:15:38,000
the least of their concerns these days.
327
00:15:38,000 —> 00:15:41,000
I mean, the SAT is slowly
becoming a thing of the past.
328
00:15:41,000 —> 00:15:45,000
After COVID-19, nearly 80%
of undergraduate colleges
329
00:15:45,000 —> 00:15:49,000
in the US no longer require
any standardized testing.
330
00:15:49,000 —> 00:15:51,000
And that 1982 exam, well,
331
00:15:51,000 —> 00:15:54,000
it didn’t turn out too badly for some.
332
00:15:54,000 —> 00:15:57,000
How did you do on your
math SAT, if I can ask?
333
00:15:57,000 —> 00:15:59,000
- I got an 800.
334
00:15:59,000 —> 00:16:03,000
Even before that, it was clear
I was gonna go into math.
335
00:16:03,000 —> 00:16:06,000
I did math competitions.
I really liked math.
336
00:16:06,000 —> 00:16:09,000
- Do you end up writing any
math questions these days?
337
00:16:09,000 —> 00:16:12,000
- A while back I wrote problems
for a math competition.
338
00:16:12,000 —> 00:16:15,000
- And were you careful with how
you wrote them, the wording?
339
00:16:15,000 —> 00:16:22,000
- I hope so. I tried
340
00:16:22,000 —> 00:16:25,000
- Today’s deep dive on
one SAT question proves
341
00:16:25,000 —> 00:16:29,000
there’s no substitute for
hands-on exploration to understand
342
00:16:29,000 —> 00:16:31,000
and appreciate the everyday
phenomena of our world.
343
00:16:31,000 —> 00:16:34,000
But you don’t have to
observe earth from space,
344
00:16:34,000 —> 00:16:37,000
or make cardboard cutouts
to get hands-on with math,
345
00:16:37,000 —> 00:16:38,000
science, and cutting edge tech.
346
00:16:38,000 —> 00:16:41,000
In fact, you can do it
from anywhere right now
347
00:16:41,000 —> 00:16:43,000
with this video sponsor, Brilliant,
348
00:16:43,000 —> 00:16:44,000
and you can get started for free.
349
00:16:44,000 —> 00:16:47,000
Just go to brilliant.org/veritasium.
350
00:16:47,000 —> 00:16:49,000
Brilliant will make you a better thinker
351
00:16:49,000 —> 00:16:52,000
and problem solver in
everything from science to math,
352
00:16:52,000 —> 00:16:55,000
data programming, technology, you name it.
353
00:16:55,000 —> 00:16:57,000
Just set your goal and
Brilliant will design a path
354
00:16:57,000 —> 00:16:59,000
to get you there.
355
00:16:59,000 —> 00:17:00,000
If you liked today’s video,
356
00:17:00,000 —> 00:17:03,000
I highly recommend you check
out one of my favorite courses
357
00:17:03,000 —> 00:17:06,000
on Brilliant, which is
Scientific Thinking.
358
00:17:06,000 —> 00:17:09,000
Scientific Thinking takes
you on an interactive tour
359
00:17:09,000 —> 00:17:10,000
of our physical world.
360
00:17:10,000 —> 00:17:13,000
You’ll engage with key
scientific principles
361
00:17:13,000 —> 00:17:15,000
and theories from simple
machines like gears and pulleys
362
00:17:15,000 —> 00:17:18,000
to Einstein’s special
theory of relativity.
363
00:17:18,000 —> 00:17:20,000
Whether you’re comparing circuits
364
00:17:20,000 —> 00:17:22,000
to understand voltage and current,
365
00:17:22,000 —> 00:17:24,000
playing snooker to learn
the rules of collisions,
366
00:17:24,000 —> 00:17:26,000
or even planning your itinerary
367
00:17:26,000 —> 00:17:31,000
for an intergalactic music
festival on a space time diagram,
368
00:17:31,000 —> 00:17:32,000
you will learn by doing
369
00:17:32,000 —> 00:17:35,000
and foster a deep understanding
without getting bogged down
370
00:17:35,000 —> 00:17:37,000
in heavy mathematical formulas.
371
00:17:37,000 —> 00:17:40,000
They even have a version
of the coin paradox.
372
00:17:40,000 —> 00:17:41,000
And by the end,
373
00:17:41,000 —> 00:17:44,000
this course will change
how you think about
374
00:17:44,000 —> 00:17:45,000
the world around you.
375
00:17:45,000 —> 00:17:48,000
Beyond science, Brilliant
has a massive library
376
00:17:48,000 —> 00:17:50,000
of content in math, data science,
377
00:17:50,000 —> 00:17:52,000
programming, and technology,
378
00:17:52,000 —> 00:17:54,000
all with that same hands-on approach
379
00:17:54,000 —> 00:17:57,000
that makes concepts
incredibly easy to understand.
380
00:17:57,000 —> 00:18:00,000
And the best part is you can
learn with Brilliant on the go.
381
00:18:00,000 —> 00:18:03,000
It’s like having interactive
versions of our videos
382
00:18:03,000 —> 00:18:04,000
in your pocket.
383
00:18:04,000 —> 00:18:06,000
To try everything Brilliant
has to offer for free
384
00:18:06,000 —> 00:18:10,000
for 30 days, just visit
brilliant.org/veritasium.
385
00:18:10,000 —> 00:18:12,000
I will put that link
down in the description.
386
00:18:12,000 —> 00:18:14,000
And the first 200 of you
387
00:18:14,000 —> 00:18:18,000
will get 20% off Brilliant’s
annual premium subscription.
388
00:18:18,000 —> 00:18:20,000
So I wanna thank brilliant
for sponsoring this video
389
00:18:20,000 —> 01:18:20,000
and I want to thank you for watching.
SCIENCE said:
The Rev Dodgson said:
Spiny Norman said:
The SAT Question Everyone Got Wrong.
Veritasium.https://www.youtube.com/watch?v=FUHkTs-Ipfg
Bugger me!
18 minutes?
No time for that today, and couldn’t see how to get the transcript.
Seen it before (or something similar).
1
00:00:00,000 —> 00:00:03,000
- In 1982, there was one SAT question2
00:00:03,000 —> 00:00:06,000
that every single student got wrong.3
00:00:06,000 —> 00:00:08,000
Here it is.4
00:00:08,000 —> 00:00:09,000
In the figure above,5
00:00:09,000 —> 00:00:13,000
the radius of circle A is
1/3 the radius of circle B.6
00:00:13,000 —> 00:00:15,000
Starting from the position
shown in the figure,7
00:00:15,000 —> 00:00:19,000
circle A rolls around circle B.8
00:00:19,000 —> 00:00:22,000
At the end of how many
revolutions of circle A9
00:00:22,000 —> 00:00:23,000
will the center10
00:00:23,000 —> 00:00:27,000
of the circle first
reach its starting point.11
00:00:27,000 —> 00:00:33,000
Is it A, 3/2, B, three, C, six,12
00:00:33,000 —> 00:00:38,000
D, 9/2, or E, nine?13
00:00:38,000 —> 00:00:40,000
SAT Questions are designed to be quick.14
00:00:40,000 —> 00:00:43,000
This exam gave students 30
minutes to solve 25 problems,15
00:00:43,000 —> 00:00:45,000
so about a minute each.16
00:00:45,000 —> 00:00:50,000
So feel free to pause the
video here and try to solve it.17
00:00:50,000 —> 00:00:53,000
What is your answer?18
00:00:53,000 —> 00:00:55,000
I’ll tell you right now that option B,19
00:00:55,000 —> 00:00:58,000
or three, is not correct.20
00:00:58,000 —> 00:01:02,000
When I first saw this problem,
my intuitive answer was B,21
00:01:02,000 —> 00:01:05,000
because the circumference of
a circle is just two pi r,22
00:01:05,000 —> 00:01:10,000
and since the radius of
circle B is three times23
00:01:10,000 —> 00:01:11,000
the radius of circle A,24
00:01:11,000 —> 00:01:14,000
the circumference of circle
B must also be three times25
00:01:14,000 —> 00:01:16,000
the circumference of circle A.26
00:01:16,000 —> 00:01:19,000
So logically, it should
take three full rotations27
00:01:19,000 —> 00:01:22,000
of circle A to roll around circle B.28
00:01:22,000 —> 00:01:26,000
So my answer was three.29
00:01:26,000 —> 00:01:34,000
This is wrong, but so are
answers A, C, D, and E.30
00:01:34,000 —> 00:01:37,000
The reason no one got question 17 correct31
00:01:37,000 —> 00:01:40,000
is that the test writers
themselves got it wrong.32
00:01:40,000 —> 00:01:42,000
They also thought the answer was three.33
00:01:42,000 —> 00:01:46,000
So the actual correct
answer was not listed34
00:01:46,000 —> 00:01:50,000
as an option on the test.35
00:01:50,000 —> 00:01:53,000
Mistakes like this aren’t
supposed to happen on the SAT.36
00:01:53,000 —> 00:01:56,000
For decades, it was the one
exam every student had to take37
00:01:56,000 —> 00:01:58,000
to go to college in the US.38
00:01:58,000 —> 00:01:59,000
It had a reputation39
00:01:59,000 —> 00:02:02,000
for determining people’s entire futures.40
00:02:02,000 —> 00:02:04,000
As a newspaper from the time stated,41
00:02:04,000 —> 00:02:07,000
“If you mess up on your SAT
tests, you can forget it.42
00:02:07,000 —> 00:02:10,000
Your life as a productive citizen is over.43
00:02:10,000 —> 00:02:13,000
Hang it up, son.”44
00:02:13,000 —> 00:02:16,000
Of 300,000 test takers,45
00:02:16,000 —> 00:02:18,000
just three students wrote about the error46
00:02:18,000 —> 00:02:21,000
to the College Board, the
company that administers the SAT,47
00:02:21,000 —> 00:02:27,000
Shivan Kartha, Bruce
Taub, and Doug Jungreis.48
00:02:27,000 —> 00:02:30,000
- I did a lot of math
problems when I was young49
00:02:30,000 —> 00:02:31,000
for the competitions.50
00:02:31,000 —> 00:02:34,000
I probably did thousands of
math problems and I read it51
00:02:34,000 —> 00:02:36,000
and I was amazed how badly it’s worded.52
00:02:36,000 —> 00:02:39,000
I just put three down. I
figured that’s what they wanted.53
00:02:39,000 —> 00:02:41,000
- The three
students were confident none54
00:02:41,000 —> 00:02:43,000
of the listed answers were correct,55
00:02:43,000 —> 00:02:44,000
and their letters showed it.56
00:02:44,000 —> 00:02:47,000
As a director at the
testing service recalled,57
00:02:47,000 —> 00:02:48,000
they didn’t say they had come up58
00:02:48,000 —> 00:02:50,000
with possible alternative answers59
00:02:50,000 —> 00:02:51,000
or that maybe we were wrong.60
00:02:51,000 —> 00:02:55,000
They said flat out, “You’re
wrong,” and they proved it.61
00:02:55,000 —> 00:02:58,000
- I discussed it with some
other people and said,62
00:02:58,000 —> 00:03:01,000
I think there was a mistake,
and they mostly said,63
00:03:01,000 —> 00:03:03,000
“No one cares.”64
00:03:03,000 —> 00:03:07,000
I wrote a letter to the
Educational Testing Service.65
00:03:07,000 —> 00:03:09,000
It was a little while later they called us66
00:03:09,000 —> 00:03:12,000
and said I was correct.67
00:03:12,000 —> 00:03:15,000
- Here is their argument.68
00:03:15,000 —> 00:03:17,000
The simplest version of this problem69
00:03:17,000 —> 00:03:19,000
is with two identical coins.70
00:03:19,000 —> 00:03:22,000
These have the exact same circumference.71
00:03:22,000 —> 00:03:24,000
So by our initial logic,72
00:03:24,000 —> 00:03:26,000
this coin should rotate exactly once73
00:03:26,000 —> 00:03:28,000
as it rolls around the other.74
00:03:28,000 —> 00:03:30,000
So let’s try it.75
00:03:30,000 —> 00:03:33,000
Okay.76
00:03:33,000 —> 00:03:36,000
But wait, we can see it’s
already right side up77
00:03:36,000 —> 00:03:37,000
at the halfway point.78
00:03:37,000 —> 00:03:41,000
So if we finish rolling
it around the other coin,79
00:03:41,000 —> 00:03:45,000
it’ll have rotated not once, but twice.80
00:03:45,000 —> 00:03:48,000
Even though the coins
are the exact same size81
00:03:48,000 —> 00:03:50,000
There are no tricks here,82
00:03:50,000 —> 00:03:51,000
you can try it for yourself,83
00:03:51,000 —> 00:03:56,000
and I’ll do it again slowly.84
00:03:56,000 —> 00:04:03,000
That’s one,85
00:04:03,000 —> 00:04:05,000
two.86
00:04:05,000 —> 00:04:08,000
This is known as the
coin rotation paradox.87
00:04:08,000 —> 00:04:12,000
This paradox also applies to question 17.88
00:04:12,000 —> 00:04:16,000
I’ve made a to scale model of the problem.89
00:04:16,000 —> 00:04:18,000
One useful tip for standardized tests,90
00:04:18,000 —> 00:04:21,000
even though they say their
images are not to scale,91
00:04:21,000 —> 00:04:24,000
they almost always are.92
00:04:24,000 —> 00:04:28,000
So when we roll circle A around circle B,93
00:04:28,000 —> 00:04:37,000
we can see that it rotates once, twice,94
00:04:37,000 —> 00:04:44,000
three times, and four times in total.95
00:04:44,000 —> 00:04:47,000
So the correct answer to this
question is actually four.96
00:04:47,000 —> 00:04:50,000
Once again, the circle
rotates one more time97
00:04:50,000 —> 00:04:51,000
than we expected.98
00:04:51,000 —> 00:04:53,000
To understand this,99
00:04:53,000 —> 00:05:00,000
let’s wrap this larger
circle in some ribbon100
00:05:00,000 —> 00:05:04,000
And I’ll make it the same
length as the circumference,101
00:05:04,000 —> 00:05:07,000
and then I will stick it down to the table102
00:05:07,000 —> 00:05:09,000
as a straight line.103
00:05:09,000 —> 00:05:12,000
I’m adding some paper here104
00:05:12,000 —> 00:05:16,000
so there’s something for this to roll on.105
00:05:16,000 —> 00:05:23,000
And now it rolls one, two, three times.106
00:05:23,000 —> 00:05:25,000
What’s happening when we
turn this straight path107
00:05:25,000 —> 00:05:28,000
into a circular one is that
circle A is now rolling108
00:05:28,000 —> 00:05:29,000
the length of the circumference109
00:05:29,000 —> 00:05:32,000
and it’s going around a circle.110
00:05:32,000 —> 00:05:34,000
The shape of the circular path itself111
00:05:34,000 —> 00:05:37,000
makes circle A do an additional rotation112
00:05:37,000 —> 00:05:39,000
to return to its starting point.113
00:05:39,000 —> 00:05:42,000
So this is the general
solution to the problem.114
00:05:42,000 —> 00:05:45,000
Find the ratio between the
circumferences of circle B115
00:05:45,000 —> 00:05:47,000
and circle A and then add one rotation116
00:05:47,000 —> 00:05:52,000
to account for the circular path traveled.117
00:05:52,000 —> 00:05:55,000
But there is a way to correctly get three.118
00:05:55,000 —> 00:05:57,000
Let’s count the rotations of circle A119
00:05:57,000 —> 00:06:00,000
from the perspective of
circle B looking out at A.120
00:06:00,000 —> 00:06:11,000
We can see circle A rotates one, two,121
00:06:11,000 —> 00:06:14,000
three times.122
00:06:14,000 —> 00:06:16,000
And it doesn’t matter which
circle you are looking from,123
00:06:16,000 —> 00:06:19,000
to circle A, it also rotates three times124
00:06:19,000 —> 00:06:24,000
to come back to its starting
position around circle B.125
00:06:24,000 —> 00:06:26,000
Similarly, from the
perspective of the coins,126
00:06:26,000 —> 00:06:29,000
we can see that the outer
coin only rotates once127
00:06:29,000 —> 00:06:33,000
as it rolls around the inner coin.128
00:06:33,000 —> 00:06:34,000
Using the perspective of a circle129
00:06:34,000 —> 00:06:36,000
is just like turning the
circle’s circumference130
00:06:36,000 —> 00:06:39,000
into a straight line.131
00:06:39,000 —> 00:06:41,000
It’s only as external observers132
00:06:41,000 —> 00:06:43,000
that we actually see
the outer circle travel133
00:06:43,000 —> 00:06:45,000
a circular path back
to its starting point,134
00:06:45,000 —> 00:06:50,000
giving us the one extra rotation.135
00:06:50,000 —> 00:06:56,000
But there’s even another answer.136
00:06:56,000 —> 00:06:58,000
If you look closely at question 17,137
00:06:58,000 —> 00:07:01,000
it asks how many
revolutions circle A makes138
00:07:01,000 —> 00:07:05,000
as it rolls around circle B
back to its starting point.139
00:07:05,000 —> 00:07:06,000
Now, in astronomy,140
00:07:06,000 —> 00:07:08,000
the definition of a revolution is precise.141
00:07:08,000 —> 00:07:12,000
It’s a complete orbit around another body.142
00:07:12,000 —> 00:07:13,000
The earth revolves around the sun,143
00:07:13,000 —> 00:07:16,000
which is different from it
rotating about its axis.144
00:07:16,000 —> 00:07:19,000
So by the astronomical
definition of a revolution,145
00:07:19,000 —> 00:07:23,000
circle A only revolves
around circle B once.146
00:07:23,000 —> 00:07:26,000
It goes around one time.147
00:07:26,000 —> 00:07:29,000
Now, other definitions of a
revolution do include the motion148
00:07:29,000 —> 00:07:31,000
of an object rotating about its own axis.149
00:07:31,000 —> 00:07:33,000
So one isn’t a definitive answer,150
00:07:33,000 —> 00:07:37,000
but the wording of this
question is extremely ambiguous151
00:07:37,000 —> 00:07:44,000
if you can justify at least
three different solutions.152
00:07:44,000 —> 00:07:46,000
After reviewing the
letters from the students,153
00:07:46,000 —> 00:07:48,000
the College Board publicly
admitted their mistake154
00:07:48,000 —> 00:07:50,000
a few weeks later and
nullified the question155
00:07:50,000 —> 00:07:53,000
for all test takers.156
00:07:53,000 —> 00:07:54,000
- They said they were
discounting the problem157
00:07:54,000 —> 00:07:56,000
and they were calling us158
00:07:56,000 —> 00:07:58,000
because they were gonna tell the news159
00:07:58,000 —> 00:08:00,000
and they thought that we should be warned160
00:08:00,000 —> 00:08:03,000
that the news might contact us.161
00:08:03,000 —> 00:08:06,000
I did a bunch of phone
interviews and NBC News,162
00:08:06,000 —> 00:08:08,000
they came to my school.163
00:08:08,000 —> 00:08:10,000
They said I was right and
they were discounting it.164
00:08:10,000 —> 00:08:13,000
So that was great.165
00:08:13,000 —> 00:08:15,000
- But there’s
more to the explanation.166
00:08:15,000 —> 00:08:18,000
- It’s easy to get an intuitive reason,167
00:08:18,000 —> 00:08:21,000
but it’s really hard to formally prove168
00:08:21,000 —> 00:08:23,000
that the answer is four.169
00:08:23,000 —> 00:08:25,000
I could give you some proofs if you want.170
00:08:25,000 —> 00:08:26,000
- Well, that would be wonderful.171
00:08:26,000 —> 00:08:29,000
I think that would be, we’d
appreciate that for sure.172
00:08:29,000 —> 00:08:31,000
- I have a whiteboard
because I’m a mathematician,173
00:08:31,000 —> 00:08:34,000
so I just happen to
have a whiteboard here.174
00:08:34,000 —> 00:08:36,000
Hold on.175
00:08:36,000 —> 00:08:39,000
Can you see that?
- Yep.176
00:08:39,000 —> 00:08:42,000
- It turns out that the amount
the small circle rotates177
00:08:42,000 —> 00:08:46,000
is always the same as the
distance the center travels.178
00:08:46,000 —> 00:08:49,000
All right, so why is this true?179
00:08:49,000 —> 00:08:50,000
Suppose you had a camera180
00:08:50,000 —> 00:08:53,000
and the camera was always
pointed at the center.181
00:08:53,000 —> 00:08:56,000
So in your movie, it looks
like the center doesn’t move.182
00:08:56,000 —> 00:08:57,000
In the real world,183
00:08:57,000 —> 00:08:59,000
the center is going around the circle.184
00:08:59,000 —> 00:09:02,000
Let’s say it’s going at some speed V.185
00:09:02,000 —> 00:09:04,000
What’s the velocity of this point?186
00:09:04,000 —> 00:09:08,000
It’s zero, and that’s because
it’s rolling without slipping.187
00:09:08,000 —> 00:09:11,000
If it had any component in that direction,188
00:09:11,000 —> 00:09:13,000
that’s what slipping would be.189
00:09:13,000 —> 00:09:14,000
I mean, this is something I think they190
00:09:14,000 —> 00:09:15,000
should have spelled out in the problem,191
00:09:15,000 —> 00:09:18,000
but when you change
your frame of reference,192
00:09:18,000 —> 00:09:21,000
the relative velocities don’t change.193
00:09:21,000 —> 00:09:24,000
In the movee, the center
always has velocity zero.194
00:09:24,000 —> 00:09:28,000
So this point would have to
have velocity negative V.195
00:09:28,000 —> 00:09:31,000
So that means the speed
that this is turning196
00:09:31,000 —> 00:09:34,000
is the same as the speed
the center is moving.197
00:09:34,000 —> 00:09:35,000
So if they always have the same speed,198
00:09:35,000 —> 00:09:38,000
they have to go the same total distance.199
00:09:38,000 —> 00:09:41,000
The total distance this
turns has to be the same200
00:09:41,000 —> 00:09:44,000
as the total distance the center moves.201
00:09:44,000 —> 00:09:45,000
In this problem,202
00:09:45,000 —> 00:09:48,000
the center of the small
circle goes around a circle203
00:09:48,000 —> 00:09:50,000
of radius four.204
00:09:50,000 —> 00:09:55,000
So the total distance that
the center moves is eight pi.205
00:09:55,000 —> 00:09:58,000
What’s the total amount that
the small circle rotates?206
00:09:58,000 —> 00:10:02,000
It rotates four times, and
its circumference is two pi.207
00:10:02,000 —> 00:10:03,000
It’s the same number.208
00:10:03,000 —> 00:10:04,000
If it rolls without slipping,209
00:10:04,000 —> 00:10:08,000
the total distance the
center travels is the same210
00:10:08,000 —> 00:10:11,000
as the total amount it turns.211
00:10:11,000 —> 00:10:14,000
- And this is always true.212
00:10:14,000 —> 00:10:16,000
Take a circle rolling without
slipping on any surface213
00:10:16,000 —> 00:10:22,000
from a polygon to a blob, on
the outside or the inside,214
00:10:22,000 —> 00:10:24,000
the distance traveled by
the center of the circle215
00:10:24,000 —> 00:10:27,000
is equal to the amount
the circle has rotated.216
00:10:27,000 —> 00:10:29,000
So, just find this distance217
00:10:29,000 —> 00:10:30,000
and divide it by the circle circumference218
00:10:30,000 —> 00:10:33,000
to get how many rotations it’s made.219
00:10:33,000 —> 00:10:35,000
This is an even more general
solution than our answer220
00:10:35,000 —> 00:10:38,000
to the coin paradox where we
just took our expected answer,221
00:10:38,000 —> 00:10:41,000
which we’ll call N, and added one,222
00:10:41,000 —> 00:10:44,000
and it reveals where
this shortcut comes from.223
00:10:44,000 —> 00:10:47,000
If a circle is rolling
continuously around a shape,224
00:10:47,000 —> 00:10:50,000
the circle center goes around the outside,225
00:10:50,000 —> 00:10:51,000
increasing its distance traveled226
00:10:51,000 —> 00:10:54,000
by exactly one circumference of the circle227
00:10:54,000 —> 00:10:56,000
so the distance traveled
by the circle center228
00:10:56,000 —> 00:10:58,000
is just the perimeter of the shape229
00:10:58,000 —> 00:11:00,000
plus the circle’s circumference.230
00:11:00,000 —> 00:11:02,000
When we ultimately divide this
by the circle circumference231
00:11:02,000 —> 00:11:07,000
to get the total number of
rotations, we get N plus one.232
00:11:07,000 —> 00:11:10,000
If a circle is rolling
continuously within a shape,233
00:11:10,000 —> 00:11:12,000
the distance travel by the
circle center decreases234
00:11:12,000 —> 00:11:14,000
by one circumference of the circle,235
00:11:14,000 —> 00:11:18,000
making the total number
of rotations N minus one.236
00:11:18,000 —> 00:11:20,000
If the circle is rolling
along a flat line,237
00:11:20,000 —> 00:11:22,000
the distance travel by the circle center238
00:11:22,000 —> 00:11:24,000
is equal to the length of the line which,239
00:11:24,000 —> 00:11:29,000
divided by the circle
circumference, is just N.240
00:11:29,000 —> 00:11:31,000
This general principle extends far beyond241
00:11:31,000 —> 00:11:32,000
a mathematical fun fact.242
00:11:32,000 —> 00:11:34,000
In fact, it’s essential in astronomy243
00:11:34,000 —> 00:11:37,000
for accurate timekeeping.244
00:11:37,000 —> 00:11:40,000
When we count 365 days going by in a year,245
00:11:40,000 —> 00:11:43,000
365.24, to be precise,246
00:11:43,000 —> 00:11:46,000
we say we’re just counting
how many rotations247
00:11:46,000 —> 00:11:48,000
the earth makes in one
orbit around the sun.248
00:11:48,000 —> 00:11:50,000
But it’s not that simple.249
00:11:50,000 —> 00:11:52,000
All this counting is
done from the perspective250
00:11:52,000 —> 00:11:54,000
of you on earth.251
00:11:54,000 —> 00:11:55,000
To an external observer,252
00:11:55,000 —> 00:11:58,000
they’ll see the earth
do one extra rotation253
00:11:58,000 —> 00:12:01,000
to account for its circular
path around the sun.254
00:12:01,000 —> 00:12:05,000
So while we count 365.24 days in a year,255
00:12:05,000 —> 00:12:10,000
they count 366.24 days in a year.256
00:12:10,000 —> 00:12:12,000
This is called a Sidereal year,257
00:12:12,000 —> 00:12:15,000
Sidereal meaning with respect to the stars258
00:12:15,000 —> 00:12:18,000
where an external observer would be.259
00:12:18,000 —> 00:12:22,000
But what happens to that one extra day?260
00:12:22,000 —> 00:12:24,000
A normal solar day is
the time it takes the sun261
00:12:24,000 —> 00:12:27,000
to be directly above you again on earth.262
00:12:27,000 —> 00:12:29,000
But the earth isn’t just rotating,263
00:12:29,000 —> 00:12:31,000
it’s orbiting the sun at the same time.264
00:12:31,000 —> 00:12:34,000
So in a 24-hour solar day,265
00:12:34,000 —> 00:12:37,000
earth actually has to
rotate more than 360 degrees266
00:12:37,000 —> 00:12:40,000
in order to bring the sun
directly overhead again.267
00:12:40,000 —> 00:12:44,000
But Earth’s orbit is
negligible to distant stars.268
00:12:44,000 —> 00:12:46,000
To see a star directly overhead again,269
00:12:46,000 —> 00:12:53,000
Earth just needs to rotate
exactly 360 degrees.270
00:12:53,000 —> 00:12:55,000
So while it takes the sun exactly 24 hours271
00:12:55,000 —> 00:13:00,000
to be directly above you again,272
00:13:00,000 —> 00:13:03,000
a star at night takes
only 23 hours, 56 minutes,273
00:13:03,000 —> 00:13:06,000
and four seconds to be above you again.274
00:13:06,000 —> 00:13:09,000
That’s a Sidereal day.275
00:13:09,000 —> 00:13:14,000
This explains where the extra
day goes in the Sidereal year.276
00:13:14,000 —> 00:13:15,000
If we start a solar day277
00:13:15,000 —> 00:13:18,000
and a Sidereal day at the same time,278
00:13:18,000 —> 00:13:21,000
we’d see them slowly
diverge throughout the year.279
00:13:21,000 —> 00:13:22,000
After six months,280
00:13:22,000 —> 00:13:26,000
the Sidereal day would be 12
hours ahead of the solar day,281
00:13:26,000 —> 00:13:29,000
meaning that noon would be midnight,282
00:13:29,000 —> 00:13:30,000
and it would keep moving up283
00:13:30,000 —> 00:13:34,000
until it’s finally one full
day ahead of the solar day,284
00:13:34,000 —> 00:13:39,000
at which point a new
year and orbit begins.285
00:13:39,000 —> 00:13:43,000
365.24 days that are each 24 hours long286
00:13:43,000 —> 00:13:48,000
are equal to 366.24 days
that are each 23 hours,287
00:13:48,000 —> 00:13:54,000
56 minutes, and four seconds long.288
00:13:54,000 —> 00:13:57,000
So it makes no sense to
use Sidereal time on earth,289
00:13:57,000 —> 00:13:58,000
because six months down the line,290
00:13:58,000 —> 00:14:01,000
day and night would be completely swapped.291
00:14:01,000 —> 00:14:04,000
But equally, it’s
useless to use solar time292
00:14:04,000 —> 00:14:06,000
while tracking objects in space,293
00:14:06,000 —> 00:14:09,000
because the region you’re
observing would shift between say,294
00:14:09,000 —> 00:14:12,000
10:00 PM one night and
10:00 PM the next night.295
00:14:12,000 —> 00:14:15,000
So instead, astronomers use Sidereal time296
00:14:15,000 —> 00:14:17,000
for their telescopes to
ensure that they’re looking297
00:14:17,000 —> 00:14:20,000
at the same region of space each night.298
00:14:20,000 —> 00:14:22,000
And all geostationary satellites,299
00:14:22,000 —> 00:14:24,000
like those used for
communication or navigation,300
00:14:24,000 —> 00:14:26,000
they use Sidereal time301
00:14:26,000 —> 00:14:31,000
to keep their orbits locked
with the Earth’s rotation.302
00:14:31,000 —> 00:14:33,000
So the coin paradox actually
explains the difference303
00:14:33,000 —> 00:14:36,000
between how we track time on earth304
00:14:36,000 —> 00:14:43,000
and how we track time in the universe.305
00:14:43,000 —> 00:14:47,000
The rescoring of the 1982
SAT wasn’t all good news.306
00:14:47,000 —> 00:14:49,000
With question 17 scrapped,307
00:14:49,000 —> 00:14:51,000
students’ scores were scaled without it,308
00:14:51,000 —> 00:14:53,000
moving their final result up or down309
00:14:53,000 —> 00:14:55,000
by 10 points out of 800.310
00:14:55,000 —> 00:14:57,000
Now, while that doesn’t seem like much,311
00:14:57,000 —> 00:14:59,000
some universities and scholarships312
00:14:59,000 —> 00:15:01,000
use strict minimum test score cutoffs.313
00:15:01,000 —> 00:15:05,000
And as one admissions expert
put it, “There are instances,314
00:15:05,000 —> 00:15:07,000
even if we do not consider them justified,315
00:15:07,000 —> 00:15:08,000
in which 10 points can have an impact316
00:15:08,000 —> 00:15:11,000
on a person’s educational opportunities.317
00:15:11,000 —> 00:15:13,000
It might not keep someone
out of law school,318
00:15:13,000 —> 00:15:17,000
but it might affect which
one he could go to.”319
00:15:17,000 —> 00:15:20,000
This mistake didn’t only
cost points off the exam.320
00:15:20,000 —> 00:15:21,000
According to the testing service,321
00:15:21,000 —> 00:15:24,000
“Rescoring would cost them over $100,000,322
00:15:24,000 —> 00:15:29,000
money that came outta the
pockets of test takers.323
00:15:29,000 —> 00:15:32,000
The question 17 circle problem
was far from the last error324
00:15:32,000 —> 00:15:35,000
on the SAT.325
00:15:35,000 —> 00:15:37,000
But errors are likely326
00:15:37,000 —> 00:15:38,000
the least of their concerns these days.327
00:15:38,000 —> 00:15:41,000
I mean, the SAT is slowly
becoming a thing of the past.328
00:15:41,000 —> 00:15:45,000
After COVID-19, nearly 80%
of undergraduate colleges329
00:15:45,000 —> 00:15:49,000
in the US no longer require
any standardized testing.330
00:15:49,000 —> 00:15:51,000
And that 1982 exam, well,331
00:15:51,000 —> 00:15:54,000
it didn’t turn out too badly for some.332
00:15:54,000 —> 00:15:57,000
How did you do on your
math SAT, if I can ask?333
00:15:57,000 —> 00:15:59,000
- I got an 800.334
00:15:59,000 —> 00:16:03,000
Even before that, it was clear
I was gonna go into math.335
00:16:03,000 —> 00:16:06,000
I did math competitions.
I really liked math.336
00:16:06,000 —> 00:16:09,000
- Do you end up writing any
math questions these days?337
00:16:09,000 —> 00:16:12,000
- A while back I wrote problems
for a math competition.338
00:16:12,000 —> 00:16:15,000
- And were you careful with how
you wrote them, the wording?339
00:16:15,000 —> 00:16:22,000
- I hope so. I tried340
00:16:22,000 —> 00:16:25,000
- Today’s deep dive on
one SAT question proves341
00:16:25,000 —> 00:16:29,000
there’s no substitute for
hands-on exploration to understand342
00:16:29,000 —> 00:16:31,000
and appreciate the everyday
phenomena of our world.343
00:16:31,000 —> 00:16:34,000
But you don’t have to
observe earth from space,344
00:16:34,000 —> 00:16:37,000
or make cardboard cutouts
to get hands-on with math,345
00:16:37,000 —> 00:16:38,000
science, and cutting edge tech.346
00:16:38,000 —> 00:16:41,000
In fact, you can do it
from anywhere right now347
00:16:41,000 —> 00:16:43,000
with this video sponsor, Brilliant,348
00:16:43,000 —> 00:16:44,000
and you can get started for free.349
00:16:44,000 —> 00:16:47,000
Just go to brilliant.org/veritasium.350
00:16:47,000 —> 00:16:49,000
Brilliant will make you a better thinker351
00:16:49,000 —> 00:16:52,000
and problem solver in
everything from science to math,352
00:16:52,000 —> 00:16:55,000
data programming, technology, you name it.353
00:16:55,000 —> 00:16:57,000
Just set your goal and
Brilliant will design a path354
00:16:57,000 —> 00:16:59,000
to get you there.355
00:16:59,000 —> 00:17:00,000
If you liked today’s video,356
00:17:00,000 —> 00:17:03,000
I highly recommend you check
out one of my favorite courses357
00:17:03,000 —> 00:17:06,000
on Brilliant, which is
Scientific Thinking.358
00:17:06,000 —> 00:17:09,000
Scientific Thinking takes
you on an interactive tour359
00:17:09,000 —> 00:17:10,000
of our physical world.360
00:17:10,000 —> 00:17:13,000
You’ll engage with key
scientific principles361
00:17:13,000 —> 00:17:15,000
and theories from simple
machines like gears and pulleys362
00:17:15,000 —> 00:17:18,000
to Einstein’s special
theory of relativity.363
00:17:18,000 —> 00:17:20,000
Whether you’re comparing circuits364
00:17:20,000 —> 00:17:22,000
to understand voltage and current,365
00:17:22,000 —> 00:17:24,000
playing snooker to learn
the rules of collisions,366
00:17:24,000 —> 00:17:26,000
or even planning your itinerary367
00:17:26,000 —> 00:17:31,000
for an intergalactic music
festival on a space time diagram,368
00:17:31,000 —> 00:17:32,000
you will learn by doing369
00:17:32,000 —> 00:17:35,000
and foster a deep understanding
without getting bogged down370
00:17:35,000 —> 00:17:37,000
in heavy mathematical formulas.371
00:17:37,000 —> 00:17:40,000
They even have a version
of the coin paradox.372
00:17:40,000 —> 00:17:41,000
And by the end,373
00:17:41,000 —> 00:17:44,000
this course will change
how you think about374
00:17:44,000 —> 00:17:45,000
the world around you.375
00:17:45,000 —> 00:17:48,000
Beyond science, Brilliant
has a massive library376
00:17:48,000 —> 00:17:50,000
of content in math, data science,377
00:17:50,000 —> 00:17:52,000
programming, and technology,378
00:17:52,000 —> 00:17:54,000
all with that same hands-on approach379
00:17:54,000 —> 00:17:57,000
that makes concepts
incredibly easy to understand.380
00:17:57,000 —> 00:18:00,000
And the best part is you can
learn with Brilliant on the go.381
00:18:00,000 —> 00:18:03,000
It’s like having interactive
versions of our videos382
00:18:03,000 —> 00:18:04,000
in your pocket.383
00:18:04,000 —> 00:18:06,000
To try everything Brilliant
has to offer for free384
00:18:06,000 —> 00:18:10,000
for 30 days, just visit
brilliant.org/veritasium.385
00:18:10,000 —> 00:18:12,000
I will put that link
down in the description.386
00:18:12,000 —> 00:18:14,000
And the first 200 of you387
00:18:14,000 —> 00:18:18,000
will get 20% off Brilliant’s
annual premium subscription.388
00:18:18,000 —> 00:18:20,000
So I wanna thank brilliant
for sponsoring this video389
00:18:20,000 —> 01:18:20,000
and I want to thank you for watching.
For future reference though you have to make it give you “more”
then at the bottom of more find the controls that
let you show the transcript
which remains in similar format to previously.
SCIENCE said:
For future reference though you have to make it give you “more”
then at the bottom of more find the controls that
let you show the transcript
which remains in similar format to previously.
Thanks for that.
The hidden secrets are now revealed.
The Rev Dodgson said:
SCIENCE said:
The Rev Dodgson said:
Seen it before (or something similar).
For future reference though you have to make it give you “more”
then at the bottom of more find the controls that
let you show the transcript
which remains in similar format to previously.
Thanks for that.
The hidden secrets are now revealed.
Yeah it’s ‘king annoying to try to keep up with the constant changes.
Anyway as you’ve said you’d seen it before, do you agree that the same kind of mechanics bases an intuitive explanation of the parallel axis theorem¿
I think that would be, we’d appreciate that for sure.
- I have a whiteboard because I’m a mathematician,
so I just happen to have a whiteboard here.
Hold on.
We mean there was remote learning and all for a while back during Zero, we’ren’t “a mathematician” but nobody thought it was weird for us to have a whiteboard right there.
SCIENCE said:
The Rev Dodgson said:
SCIENCE said:
For future reference though you have to make it give you “more”
then at the bottom of more find the controls that
let you show the transcript
which remains in similar format to previously.
Thanks for that.
The hidden secrets are now revealed.
Yeah it’s ‘king annoying to try to keep up with the constant changes.
Anyway as you’ve said you’d seen it before, do you agree that the same kind of mechanics bases an intuitive explanation of the parallel axis theorem¿
I’m not sure, I don’t really see it at the moment. Can you give a hint?
(btw, I had to look up “parallel axis theorum”, which is a bit ironic, since I typically use it 100’s of times a day. Or at least my computer does)
The Rev Dodgson said:
SCIENCE said:
The Rev Dodgson said:
Thanks for that.
The hidden secrets are now revealed.
Yeah it’s ‘king annoying to try to keep up with the constant changes.
Anyway as you’ve said you’d seen it before, do you agree that the same kind of mechanics bases an intuitive explanation of the parallel axis theorem¿
I’m not sure, I don’t really see it at the moment. Can you give a hint?
(btw, I had to look up “parallel axis theorum”, which is a bit ironic, since I typically use it 100’s of times a day. Or at least my computer does)
Nice but we agree, we used it long before someone told us it was called a parallel axis theorem.
Hint: break down the rotation into an orbit-revolution and an axis-revolution.
On November 30, 1942, USS New Orleans (CA 32) was hit by a torpedo off Guadalcanal. Her entire bow was torn away.
The ship struggled to stay afloat, and limped back to Guadalcanal for temporary repairs. Because of her condition, she had to make the journey while sailing backwards. The fix included a bow fashioned of palm tree logs. After stopping in Sydney, Australia for further repairs, New Orleans made her way to Bremerton.
By the time she arrived in Bremerton, a new bow had already been built for her using plans from her sister ship, USS Astoria, coincidentally built by the Puget Sound Navy Yard in the 1930s. When New Orleans arrived at the shipyard, it was discovered that the new bow was out of line by just one-eighth of an inch. Soon USS New Orleans was able to return to the fleet.
This photo was taken at the Puget Sound Navy Yard, between the removal of her temporary bow and the installation of the new one.
Spiny Norman said:
On November 30, 1942, USS New Orleans (CA 32) was hit by a torpedo off Guadalcanal. Her entire bow was torn away.
The ship struggled to stay afloat, and limped back to Guadalcanal for temporary repairs. Because of her condition, she had to make the journey while sailing backwards. The fix included a bow fashioned of palm tree logs. After stopping in Sydney, Australia for further repairs, New Orleans made her way to Bremerton.
By the time she arrived in Bremerton, a new bow had already been built for her using plans from her sister ship, USS Astoria, coincidentally built by the Puget Sound Navy Yard in the 1930s. When New Orleans arrived at the shipyard, it was discovered that the new bow was out of line by just one-eighth of an inch. Soon USS New Orleans was able to return to the fleet.
This photo was taken at the Puget Sound Navy Yard, between the removal of her temporary bow and the installation of the new one.
This isUSS New Orleans on the morning after the battle:
In the immediate aftermath, a repair party headed to where the explosion had occurred, only to find open air and stars showing where steel should have been. ‘Where’s the bow?’, one sailor asked. ‘Uhh…gone, i guess’ said another.
The bow section had been blown off, and floated intact for a while, at one stage bumping into the stern area of the New Orleans, the only known incident of a ship’s bow ramming its own stern.
I WW1, the forward section of Royal Navy destroyer HMS Zulu was saved after severe battle damage, and was paired with the after section of HMS Nubian, which had similarly been preserved after having its bow destroyed in action. The resulting Tribal-class destroyer was, not surprisingly, named HMS Zubian,
Sony Steals Customers’ Purchased Content – Piracy is COMPLETELY JUSTIFIED!
By Louis Rossmann
A little birdie tells me you have a new toy, Mr Norman, Sir. 😁 😎
Woodie said:
A little birdie tells me you have a new toy, Mr Norman, Sir. 😁 😎
My Anycubic Photon M3 Max is churning away as we speak.
Train bogie sideframes.
Woodie said:
A little birdie tells me you have a new toy, Mr Norman, Sir. 😁 😎
Not that I know of!
Woodie said:
Woodie said:
A little birdie tells me you have a new toy, Mr Norman, Sir. 😁 😎
My Anycubic Photon M3 Max is churning away as we speak.
Train bogie sideframes.
Your first goo print?
Spiny Norman said:
Woodie said:
Woodie said:
A little birdie tells me you have a new toy, Mr Norman, Sir. 😁 😎
My Anycubic Photon M3 Max is churning away as we speak.
Train bogie sideframes.
Your first goo print?
Nah…….. had it since early Sept. The Creality FDM one got chucked in the dam.
I though I saw somewhere you’d got a new one?
Woodie said:
Spiny Norman said:
Woodie said:My Anycubic Photon M3 Max is churning away as we speak.
Train bogie sideframes.
Your first goo print?
Nah…….. had it since early Sept. The Creality FDM one got chucked in the dam.
I though I saw somewhere you’d got a new one?
No, just the infrequent mods & repairs to the regular old machine.
You might be thinking of the big one I designed, it’ll do a 500mm cube. I’ve got most of the structure done, got pretty much all the hardware & gear, just have to do a bit of accurate machine work in the shed to get through the next stage.
Spiny Norman said:
Woodie said:
Spiny Norman said:Your first goo print?
Nah…….. had it since early Sept. The Creality FDM one got chucked in the dam.
I though I saw somewhere you’d got a new one?
No, just the infrequent mods & repairs to the regular old machine.
You might be thinking of the big one I designed, it’ll do a 500mm cube. I’ve got most of the structure done, got pretty much all the hardware & gear, just have to do a bit of accurate machine work in the shed to get through the next stage.
Looking good!! 😎 You made pretty much all of that?
Woodie said:
Spiny Norman said:
Woodie said:Nah…….. had it since early Sept. The Creality FDM one got chucked in the dam.
I though I saw somewhere you’d got a new one?
No, just the infrequent mods & repairs to the regular old machine.
You might be thinking of the big one I designed, it’ll do a 500mm cube. I’ve got most of the structure done, got pretty much all the hardware & gear, just have to do a bit of accurate machine work in the shed to get through the next stage.
Looking good!! 😎 You made pretty much all of that?
Yeah. That’s the CAD model of it but of course the real thing looks pretty much identical. I got the frame panels CNC water-cut and decided due to the cost of such things I’d machine the rest of the parts (the metal parts that hold the X/Y gantry together) on my own miller. Just have to get off my arse and do that.
Woodie said:
Spiny Norman said:
Woodie said:Nah…….. had it since early Sept. The Creality FDM one got chucked in the dam.
I though I saw somewhere you’d got a new one?
No, just the infrequent mods & repairs to the regular old machine.
You might be thinking of the big one I designed, it’ll do a 500mm cube. I’ve got most of the structure done, got pretty much all the hardware & gear, just have to do a bit of accurate machine work in the shed to get through the next stage.
Looking good!! 😎 You made pretty much all of that?
I’ll swear by the goo printers now. The finer detail you can get with them. There isn’t anything that it won’t print when it comes to detail. Got a huge problem with warping on larger prints though.
Woodie said:
Woodie said:
Spiny Norman said:No, just the infrequent mods & repairs to the regular old machine.
You might be thinking of the big one I designed, it’ll do a 500mm cube. I’ve got most of the structure done, got pretty much all the hardware & gear, just have to do a bit of accurate machine work in the shed to get through the next stage.
Looking good!! 😎 You made pretty much all of that?
I’ll swear by the goo printers now. The finer detail you can get with them. There isn’t anything that it won’t print when it comes to detail. Got a huge problem with warping on larger prints though.
A common problem with all additive printers.
Spiny Norman said:
Woodie said:
Spiny Norman said:No, just the infrequent mods & repairs to the regular old machine.
You might be thinking of the big one I designed, it’ll do a 500mm cube. I’ve got most of the structure done, got pretty much all the hardware & gear, just have to do a bit of accurate machine work in the shed to get through the next stage.
Looking good!! 😎 You made pretty much all of that?
Yeah. That’s the CAD model of it but of course the real thing looks pretty much identical. I got the frame panels CNC water-cut and decided due to the cost of such things I’d machine the rest of the parts (the metal parts that hold the X/Y gantry together) on my own miller. Just have to get off my arse and do that.
I’ve got an Elegoo Phecda 10W 400 * 400 laser cutter/engraver turning up this week. 😎
Woodie said:
Spiny Norman said:
Woodie said:Looking good!! 😎 You made pretty much all of that?
Yeah. That’s the CAD model of it but of course the real thing looks pretty much identical. I got the frame panels CNC water-cut and decided due to the cost of such things I’d machine the rest of the parts (the metal parts that hold the X/Y gantry together) on my own miller. Just have to get off my arse and do that.
I’ve got an Elegoo Phecda 10W 400 * 400 laser cutter/engraver turning up this week. 😎
Nice.
I’m guessing it can’t cut through 6mm alloy though.
Spiny Norman said:
Woodie said:
Spiny Norman said:Your first goo print?
Nah…….. had it since early Sept. The Creality FDM one got chucked in the dam.
I though I saw somewhere you’d got a new one?
No, just the infrequent mods & repairs to the regular old machine.
You might be thinking of the big one I designed, it’ll do a 500mm cube. I’ve got most of the structure done, got pretty much all the hardware & gear, just have to do a bit of accurate machine work in the shed to get through the next stage.
I’ve seen Yoochoobs about making your own. What are you using as the heatbed?
Spiny Norman said:
Woodie said:
Spiny Norman said:Yeah. That’s the CAD model of it but of course the real thing looks pretty much identical. I got the frame panels CNC water-cut and decided due to the cost of such things I’d machine the rest of the parts (the metal parts that hold the X/Y gantry together) on my own miller. Just have to get off my arse and do that.
I’ve got an Elegoo Phecda 10W 400 * 400 laser cutter/engraver turning up this week. 😎
Nice.
I’m guessing it can’t cut through 6mm alloy though.
Nup. It’ll engrave it though, hey what but.
Woodie said:
Spiny Norman said:
Woodie said:Nah…….. had it since early Sept. The Creality FDM one got chucked in the dam.
I though I saw somewhere you’d got a new one?
No, just the infrequent mods & repairs to the regular old machine.
You might be thinking of the big one I designed, it’ll do a 500mm cube. I’ve got most of the structure done, got pretty much all the hardware & gear, just have to do a bit of accurate machine work in the shed to get through the next stage.
I’ve seen Yoochoobs about making your own. What are you using as the heatbed?
A 500mm square 240 volt heat pad under a 6mm plate of alloy. That’ll have a magnetic panel on top, then a removable flexible PEI plate on top of that.
Note the front handrails just below the windows, and lower steps. And handrails on the rear. That carriage is about 30mm wide. No way known with the Creailty even with a .2mm nozzle, will it do those handrails and steps.. Needed to slice with a .2mm nozzle just to get them to show up in the slicer.
Woodie said:
Note the front handrails just below the windows, and lower steps. And handrails on the rear. That carriage is about 30mm wide. No way known with the Creailty even with a .2mm nozzle, will it do those handrails and steps.. Needed to slice with a .2mm nozzle just to get them to show up in the slicer.
Yep that’s superb detail all right.
Do the supports break away okay?
Spiny Norman said:
Woodie said:
Spiny Norman said:No, just the infrequent mods & repairs to the regular old machine.
You might be thinking of the big one I designed, it’ll do a 500mm cube. I’ve got most of the structure done, got pretty much all the hardware & gear, just have to do a bit of accurate machine work in the shed to get through the next stage.
I’ve seen Yoochoobs about making your own. What are you using as the heatbed?
A 500mm square 240 volt heat pad under a 6mm plate of alloy. That’ll have a magnetic panel on top, then a removable flexible PEI plate on top of that.
What temp will you run the heatbed at? Depends on the filament I suppose. Have you got good temp sensors for it? What is your predicted heatup time for the bed? If I take mine above about 60C it takes forever to warm it up.
Woodie said:
Spiny Norman said:
Woodie said:I’ve seen Yoochoobs about making your own. What are you using as the heatbed?
A 500mm square 240 volt heat pad under a 6mm plate of alloy. That’ll have a magnetic panel on top, then a removable flexible PEI plate on top of that.
What temp will you run the heatbed at? Depends on the filament I suppose. Have you got good temp sensors for it? What is your predicted heatup time for the bed? If I take mine above about 60C it takes forever to warm it up.
Yeah it depends on the filament. PLA likes about 50°, PETG 70°, ASA 100°, etc.
The heater has plenty of grunt so it shouldn’t take too long to heat up, though that being said the printer bed is a pretty big chunk of metal so I’ll let it heat-soak at the desired temperature for ten minutes or so, so that the top surface gets up to temp as well. The heater pad has its own temp sensor.
Spiny Norman said:
Woodie said:
Note the front handrails just below the windows, and lower steps. And handrails on the rear. That carriage is about 30mm wide. No way known with the Creailty even with a .2mm nozzle, will it do those handrails and steps.. Needed to slice with a .2mm nozzle just to get them to show up in the slicer.
Yep that’s superb detail all right.
Do the supports break away okay?
Yeah. The supports come off quite easily. the “default” supports will put them all up along the base of the sides as well. I manually remove those before slicing. The supports are needed internally to support the roof.
Goo printing is also much quicker, as it does one entire layer at a time. So the print time is entirely dependant on the height of the z-axis. But it’s messy. Real messy with the cleanup, washing and curing.
Woodie said:
Spiny Norman said:
Woodie said:
Note the front handrails just below the windows, and lower steps. And handrails on the rear. That carriage is about 30mm wide. No way known with the Creailty even with a .2mm nozzle, will it do those handrails and steps.. Needed to slice with a .2mm nozzle just to get them to show up in the slicer.
Yep that’s superb detail all right.
Do the supports break away okay?
Yeah. The supports come off quite easily. the “default” supports will put them all up along the base of the sides as well. I manually remove those before slicing. The supports are needed internally to support the roof.
Goo printing is also much quicker, as it does one entire layer at a time. So the print time is entirely dependant on the height of the z-axis. But it’s messy. Real messy with the cleanup, washing and curing.
There’s positives & negatives to both types, for sure.
Spiny Norman said:
Woodie said:
Spiny Norman said:Yep that’s superb detail all right.
Do the supports break away okay?
Yeah. The supports come off quite easily. the “default” supports will put them all up along the base of the sides as well. I manually remove those before slicing. The supports are needed internally to support the roof.
Goo printing is also much quicker, as it does one entire layer at a time. So the print time is entirely dependant on the height of the z-axis. But it’s messy. Real messy with the cleanup, washing and curing.
There’s positives & negatives to both types, for sure.
Fully agree with you on that one, Mr Noman. You get a lot of bed adhesion reports on both types. I ended up using glustick, or even better, hairspray for the FDM printer. Even then I still had lots of problems with initial layers. No probs with bed adhesion using goo, unless it was my fault.
Woodie said:
Spiny Norman said:
Woodie said:Yeah. The supports come off quite easily. the “default” supports will put them all up along the base of the sides as well. I manually remove those before slicing. The supports are needed internally to support the roof.
Goo printing is also much quicker, as it does one entire layer at a time. So the print time is entirely dependant on the height of the z-axis. But it’s messy. Real messy with the cleanup, washing and curing.
There’s positives & negatives to both types, for sure.
Fully agree with you on that one, Mr Noman. You get a lot of bed adhesion reports on both types. I ended up using glustick, or even better, hairspray for the FDM printer. Even then I still had lots of problems with initial layers. No probs with bed adhesion using goo, unless it was my fault.
I do remember you mentioning such things many times. Yeah they can certainly be a huge pain in the rear at times.
Thanks for the chat, Mr Noman, Sir.
Better go do some of that maaaaarn I was gunna do.
Oh….. no way known could you make your own resin printer. 🤣
The first water-based computer
The beginning of the 1930s was a shocking time for the computing systems. In particular, in 1936 Vladimir Lukyanov realized an analog special pourpose water-based computer. It was not a simple academic exercise, but the Lukyanov’s computer was built for the particular purpose of solving the practical problem of cracking in concrete. To solve the cracking problem involved calculating the complex relationships between the material properties of the concrete, the curing process, and environmental conditions. Whereas existing calculation methods did not give quick or accurate solutions, the Lukyanov water computer did. The hydraulic integrators were launched into serial production. These water computers were used successfully in other areas such as geology, metallurgy, thermal physics, and rocket engineering. In the 1970’s these computers were still used in 115 manufacturing, research, and educational institutions in the USSR. It wasn’t until the 1980s that digital computers came to surpass the functionality of the water computer.
No electricity is required to implement a calculation system. Who could imagine that this couldn’t happen again in the future or if it has not already been done in the far past.
Water flowing from one glass tube to another allowed solving differential equations with partial derivatives.
The case was in the period of industrialization of the USSR, when a freshly minted engineer Vladimir Lukyanov got to the construction of a railroad and faced the problem of low quality of concreting (concrete cracked when it hardened). Lukyanov assumed that this was due to temperature stresses and generalized the existing theoretical developments. The process was described by differential equations requiring lengthy calculations, but Lukyanov saw the main thing – the analogy between the equations describing heat transfer and the equations describing the flow of liquid. That is, the first process could be modeled with the help of the second.
A few years later, Lukyanov created an apparatus to solve this very specific problem – to analyze the temperature change in concrete depending on its composition, pouring technology and external conditions.
An example of a problem to be solved:
Heat transfer under unsteady conditions – cooling of a multilayer flat wall
The model is assembled from a number of cylindrical vessels connected in series by calibrated tubes. Each of the vessels simulates the heat content of the wall layer into which the enclosure under study is divided. The vessels are filled with water to the levels corresponding to the initial temperature in each of the layers, after which the taps are opened and water begins to flow out of the vessels. The change of water levels in the vessels will be similar to the change of temperatures in the corresponding layers of the wall when it cools down.
P.S.
When we think of a computer we always imagine it powered by electricity.
Technologically, this computer opens a new perspective on the technical knowledge of ancient civilizations of the past, particularly the Greek empire. At today the first portable computer in the history is of Greek origin and dates back a few hundred years B.C.: was studied and physically reconstructed.(The Antikythera mechanism working by cogwheels).
Already in ancient Greece, the use and principle of communicating vessels was known, which was assimilated and used by the Roman Empire. Of course, it’s just a plausible idea, but nothing has yet found out about it.
Just noticed, a perfect typo.
“in 1936 Vladimir Lukyanov realized an analog special pourpose water-based computer.”
One for Captain Spalding.
Project 941 or Akula, Russian “Акула” (“Shark”) class submarine (NATO reporting name: Typhoon) under construction.
https://navalhistoria.com/kursk/
I believe they are the largest subs ever built. And they certainly look quite large in that photo.
Spiny Norman said:
The first water-based computerThe beginning of the 1930s was a shocking time for the computing systems. In particular, in 1936 Vladimir Lukyanov realized an analog special pourpose water-based computer. It was not a simple academic exercise, but the Lukyanov’s computer was built for the particular purpose of solving the practical problem of cracking in concrete. To solve the cracking problem involved calculating the complex relationships between the material properties of the concrete, the curing process, and environmental conditions. Whereas existing calculation methods did not give quick or accurate solutions, the Lukyanov water computer did. The hydraulic integrators were launched into serial production. These water computers were used successfully in other areas such as geology, metallurgy, thermal physics, and rocket engineering. In the 1970’s these computers were still used in 115 manufacturing, research, and educational institutions in the USSR. It wasn’t until the 1980s that digital computers came to surpass the functionality of the water computer.
No electricity is required to implement a calculation system. Who could imagine that this couldn’t happen again in the future or if it has not already been done in the far past.Water flowing from one glass tube to another allowed solving differential equations with partial derivatives.
The case was in the period of industrialization of the USSR, when a freshly minted engineer Vladimir Lukyanov got to the construction of a railroad and faced the problem of low quality of concreting (concrete cracked when it hardened). Lukyanov assumed that this was due to temperature stresses and generalized the existing theoretical developments. The process was described by differential equations requiring lengthy calculations, but Lukyanov saw the main thing – the analogy between the equations describing heat transfer and the equations describing the flow of liquid. That is, the first process could be modeled with the help of the second.
A few years later, Lukyanov created an apparatus to solve this very specific problem – to analyze the temperature change in concrete depending on its composition, pouring technology and external conditions.
An example of a problem to be solved:
Heat transfer under unsteady conditions – cooling of a multilayer flat wall
The model is assembled from a number of cylindrical vessels connected in series by calibrated tubes. Each of the vessels simulates the heat content of the wall layer into which the enclosure under study is divided. The vessels are filled with water to the levels corresponding to the initial temperature in each of the layers, after which the taps are opened and water begins to flow out of the vessels. The change of water levels in the vessels will be similar to the change of temperatures in the corresponding layers of the wall when it cools down.
P.S.
When we think of a computer we always imagine it powered by electricity.
Technologically, this computer opens a new perspective on the technical knowledge of ancient civilizations of the past, particularly the Greek empire. At today the first portable computer in the history is of Greek origin and dates back a few hundred years B.C.: was studied and physically reconstructed.(The Antikythera mechanism working by cogwheels).
Already in ancient Greece, the use and principle of communicating vessels was known, which was assimilated and used by the Roman Empire. Of course, it’s just a plausible idea, but nothing has yet found out about it.
Thanks for that.
I’d never heard of this computer before!
(and modernn computers are still crap at predicting cracking in concrete. It’s unpredictable)
I Made A Water Computer And It Actually Works
https://www.youtube.com/watch?v=IxXaizglscw
The Rev Dodgson said:
Spiny Norman said:
The first water-based computerThe beginning of the 1930s was a shocking time for the computing systems. In particular, in 1936 Vladimir Lukyanov realized an analog special pourpose water-based computer. It was not a simple academic exercise, but the Lukyanov’s computer was built for the particular purpose of solving the practical problem of cracking in concrete. To solve the cracking problem involved calculating the complex relationships between the material properties of the concrete, the curing process, and environmental conditions. Whereas existing calculation methods did not give quick or accurate solutions, the Lukyanov water computer did. The hydraulic integrators were launched into serial production. These water computers were used successfully in other areas such as geology, metallurgy, thermal physics, and rocket engineering. In the 1970’s these computers were still used in 115 manufacturing, research, and educational institutions in the USSR. It wasn’t until the 1980s that digital computers came to surpass the functionality of the water computer.
No electricity is required to implement a calculation system. Who could imagine that this couldn’t happen again in the future or if it has not already been done in the far past.Water flowing from one glass tube to another allowed solving differential equations with partial derivatives.
The case was in the period of industrialization of the USSR, when a freshly minted engineer Vladimir Lukyanov got to the construction of a railroad and faced the problem of low quality of concreting (concrete cracked when it hardened). Lukyanov assumed that this was due to temperature stresses and generalized the existing theoretical developments. The process was described by differential equations requiring lengthy calculations, but Lukyanov saw the main thing – the analogy between the equations describing heat transfer and the equations describing the flow of liquid. That is, the first process could be modeled with the help of the second.
A few years later, Lukyanov created an apparatus to solve this very specific problem – to analyze the temperature change in concrete depending on its composition, pouring technology and external conditions.
An example of a problem to be solved:
Heat transfer under unsteady conditions – cooling of a multilayer flat wall
The model is assembled from a number of cylindrical vessels connected in series by calibrated tubes. Each of the vessels simulates the heat content of the wall layer into which the enclosure under study is divided. The vessels are filled with water to the levels corresponding to the initial temperature in each of the layers, after which the taps are opened and water begins to flow out of the vessels. The change of water levels in the vessels will be similar to the change of temperatures in the corresponding layers of the wall when it cools down.
P.S.
When we think of a computer we always imagine it powered by electricity.
Technologically, this computer opens a new perspective on the technical knowledge of ancient civilizations of the past, particularly the Greek empire. At today the first portable computer in the history is of Greek origin and dates back a few hundred years B.C.: was studied and physically reconstructed.(The Antikythera mechanism working by cogwheels).
Already in ancient Greece, the use and principle of communicating vessels was known, which was assimilated and used by the Roman Empire. Of course, it’s just a plausible idea, but nothing has yet found out about it.
Thanks for that.
I’d never heard of this computer before!
(and modernn computers are still crap at predicting cracking in concrete. It’s unpredictable)
The bingbot thinks that this was the first water based computer:
… but that was made in 1949, whereas the one in Bill’s link was made in 1936.
Trying To Solve The 150 Year Old Mystery of the Crooke’s radiometer.
The Action Lab.
Spiny Norman said:
Trying To Solve The 150 Year Old Mystery of the Crooke’s radiometer.
The Action Lab.
It’s a mystery?
When I was at high school (about 55 years ago) we were told there was a simple explanation based on the air on the black side of the vane being hotter.
It seems we were told wrong:
Your Tattoo is INSIDE Your Immune System. Literally.
Kurzgesagt
(Not as much fun as you’d thought it’d be)
The New Eruption in Iceland Could Become Very Destructive – Location, Maps and the Scenario,
https://www.youtube.com/watch?v=upxdopmXsBE
Quite spectacular.
Spiny Norman said:
The New Eruption in Iceland Could Become Very Destructive – Location, Maps and the Scenario,https://www.youtube.com/watch?v=upxdopmXsBE
Quite spectacular.
Nods.
Bank Robber Dresses as Santa, Has Terrible Experience. Tales From the Bottle.
Qxir.
Spiny Norman said:
Bank Robber Dresses as Santa, Has Terrible Experience. Tales From the Bottle.
Qxir.
Yep, Texas.
The Horse Manure Problem of 1894
The 15 to 30 pounds of manure produced daily by each beast multiplied by the 150,000+ horses in New York city resulted in more than three million pounds of horse manure per day that somehow needed to be disposed of. That’s not to mention the daily 40,000 gallons of horse urine.
In other words, cities reeked. As Morris says, the “stench was omnipresent.” Here are some fun bits from his article:
Urban streets were minefields that needed to be navigated with the greatest care. “Crossing sweepers” stood on street corners; for a fee they would clear a path through the mire for pedestrians. Wet weather turned the streets into swamps and rivers of muck, but dry weather brought little improvement; the manure turned to dust, which was then whipped up by the wind, choking pedestrians and coating buildings.
. . . even when it had been removed from the streets the manure piled up faster than it could be disposed of
. . . early in the century farmers were happy to pay good money for the manure, by the end of the 1800s stable owners had to pay to have it carted off. As a result of this glut
. . . vacant lots in cities across America became piled high with manure; in New York these sometimes rose to forty and even sixty feet.
We need to remind ourselves that horse manure is an ideal breeding ground for flies, which spread disease. Morris reports that deadly outbreaks of typhoid and “infant diarrheal diseases can be traced to spikes in the fly population.”
Comparing fatalities associated with horse-related accidents in 1916 Chicago versus automobile accidents in 1997, he concludes that people were killed nearly seven times more often back in the good old days. The reasons for this are straightforward:
. . . horse-drawn vehicles have an engine with a mind of its own. The skittishness of horses added a dangerous level of unpredictability to nineteenth-century transportation. This was particularly true in a bustling urban environment, full of surprises that could shock and spook the animals. Horses often stampeded, but a more common danger came from horses kicking, biting, or trampling bystanders. Children were particularly at risk.
Falls, injuries, and maltreatment also took a toll on the horses themselves. Data cited by Morris indicates that, in 1880, more than 3 dozen dead horses were cleared from New York streets each day (nearly 15,000 a year).
Spiny Norman said:
The Horse Manure Problem of 1894
The 15 to 30 pounds of manure produced daily by each beast multiplied by the 150,000+ horses in New York city resulted in more than three million pounds of horse manure per day that somehow needed to be disposed of. That’s not to mention the daily 40,000 gallons of horse urine.In other words, cities reeked. As Morris says, the “stench was omnipresent.” Here are some fun bits from his article:
Urban streets were minefields that needed to be navigated with the greatest care. “Crossing sweepers” stood on street corners; for a fee they would clear a path through the mire for pedestrians. Wet weather turned the streets into swamps and rivers of muck, but dry weather brought little improvement; the manure turned to dust, which was then whipped up by the wind, choking pedestrians and coating buildings.
. . . even when it had been removed from the streets the manure piled up faster than it could be disposed of
. . . early in the century farmers were happy to pay good money for the manure, by the end of the 1800s stable owners had to pay to have it carted off. As a result of this glut
. . . vacant lots in cities across America became piled high with manure; in New York these sometimes rose to forty and even sixty feet.We need to remind ourselves that horse manure is an ideal breeding ground for flies, which spread disease. Morris reports that deadly outbreaks of typhoid and “infant diarrheal diseases can be traced to spikes in the fly population.”
Comparing fatalities associated with horse-related accidents in 1916 Chicago versus automobile accidents in 1997, he concludes that people were killed nearly seven times more often back in the good old days. The reasons for this are straightforward:
. . . horse-drawn vehicles have an engine with a mind of its own. The skittishness of horses added a dangerous level of unpredictability to nineteenth-century transportation. This was particularly true in a bustling urban environment, full of surprises that could shock and spook the animals. Horses often stampeded, but a more common danger came from horses kicking, biting, or trampling bystanders. Children were particularly at risk.Falls, injuries, and maltreatment also took a toll on the horses themselves. Data cited by Morris indicates that, in 1880, more than 3 dozen dead horses were cleared from New York streets each day (nearly 15,000 a year).
It was pretty bleak. Kids playing in the gutter near a dead horse.
Bubblecar said:
Spiny Norman said:
The Horse Manure Problem of 1894
The 15 to 30 pounds of manure produced daily by each beast multiplied by the 150,000+ horses in New York city resulted in more than three million pounds of horse manure per day that somehow needed to be disposed of. That’s not to mention the daily 40,000 gallons of horse urine.In other words, cities reeked. As Morris says, the “stench was omnipresent.” Here are some fun bits from his article:
Urban streets were minefields that needed to be navigated with the greatest care. “Crossing sweepers” stood on street corners; for a fee they would clear a path through the mire for pedestrians. Wet weather turned the streets into swamps and rivers of muck, but dry weather brought little improvement; the manure turned to dust, which was then whipped up by the wind, choking pedestrians and coating buildings.
. . . even when it had been removed from the streets the manure piled up faster than it could be disposed of
. . . early in the century farmers were happy to pay good money for the manure, by the end of the 1800s stable owners had to pay to have it carted off. As a result of this glut
. . . vacant lots in cities across America became piled high with manure; in New York these sometimes rose to forty and even sixty feet.We need to remind ourselves that horse manure is an ideal breeding ground for flies, which spread disease. Morris reports that deadly outbreaks of typhoid and “infant diarrheal diseases can be traced to spikes in the fly population.”
Comparing fatalities associated with horse-related accidents in 1916 Chicago versus automobile accidents in 1997, he concludes that people were killed nearly seven times more often back in the good old days. The reasons for this are straightforward:
. . . horse-drawn vehicles have an engine with a mind of its own. The skittishness of horses added a dangerous level of unpredictability to nineteenth-century transportation. This was particularly true in a bustling urban environment, full of surprises that could shock and spook the animals. Horses often stampeded, but a more common danger came from horses kicking, biting, or trampling bystanders. Children were particularly at risk.Falls, injuries, and maltreatment also took a toll on the horses themselves. Data cited by Morris indicates that, in 1880, more than 3 dozen dead horses were cleared from New York streets each day (nearly 15,000 a year).
It was pretty bleak. Kids playing in the gutter near a dead horse.
That horse is knackered.
Why Do Exact Equations Become Unpredictable?
The Action Lab.
Spiny Norman said:
Why Do Exact Equations Become Unpredictable?
The Action Lab.
Closing quote (more or less):
“Even if it wasn’t for the unpredictability of quantum mechanics, we would still live in an unpredictable world.”
I think that deserves more attention than it gets.
The Rev Dodgson said:
Spiny Norman said:
Why Do Exact Equations Become Unpredictable?
The Action Lab.Closing quote (more or less):
“Even if it wasn’t for the unpredictability of quantum mechanics, we would still live in an unpredictable world.”
I think that deserves more attention than it gets.
The other thing that I think was a bit misleading in the presentation was that it presented the calculations as always giving the same results for the same starting positions, but the calculations are not precise. If they randomly changed the rounding conventions for each step of the calculation, or randomly changed the interval between calculations, then every simulation would have different results, even with exactly the same starting conditions.
And that is how the world really works.
Georgia Ann Thompson, the first female parachutist and inventor of the rip cord, became famous under the name Tiny Broadwick. She weighed only three pounds at birth in 1893 in North Carolina, and never grew past 5 feet tall and 80 pounds. She married at 12, and bore a daughter, Verla, at 13. After her husband died in an accident, she had to work 14-hour days in a cotton mill.
“In 1907 at the North Carolina State Fair, Georgia saw the performance, ‘The Broadwicks and their Famous French Aeronauts.’ The performers ascended to the sky in hot-air balloons, then thrilled spectators by jumping out of them with parachutes. Inspired by this, Georgia asked show owner Charles Broadwick if she could travel with the group and become a part of the act. He agreed to hire her, and Georgia’s mother let her go with a few stipulations- she had to leave Verla behind and send back money to help support her. Broadwick trained her in the art of parachute jumping, and in 1908, legally adopted her. When this happened, Georgia’s name officially became Tiny Broadwick.
“While performing, Tiny was known as “The Doll Girl”. She dressed in ruffled bloomers with pink bows on her arms, ribbons in her long curly hair, and a bonnet on her head. Tiny was just 15 years old when she jumped from a hot-air balloon at the 1908 North Carolina State Fair. Describing her feelings later, she said, “I tell you, honey, it was the most wonderful sensation in the world!” It was a thrill she would come to experience some 1,000 times in her life.
“Tiny and Charles Broadwick traveled all over the country with their balloon act, but by 1912, their performance was losing popularity. Fortunately, a new opportunity presented itself to Tiny when she met famed pilot Glenn Martin. He had seen her jump from a balloon, and asked if she would like to parachute from his airplane instead. Tiny immediately agreed to work for Martin, whose aircraft company is still in business today and is operating under the name Martin Marietta.
“In preparation for the jump, Charles Broadwick developed a parachute for Tiny made of silk. It was packed into a knapsack attached to a canvas jacket with harness straps. A string was fastened to the plane’s fuselage and woven through the parachute’s canvas covering. When Tiny jumped from the plane, the cover tore away and her parachute filled with air.
“On her first jump, Tiny was suspended from a trap seat behind the wing and outside the cockpit, with the parachute on a shelf above her. Martin took the plane up to two thousand feet, and then Tiny released a lever alongside the seat, allowing it to drop out from under her. The jump was a success and she landed in Griffith Park in Los Angeles, making her the first woman to parachute from an airplane. After that first jump from Martin’s plane, Tiny was in great demand all over the country. She also became the first woman to parachute into a body of water.
“In 1914, at the start of WWI, representatives of the Army Air Corps visited Tiny in San Diego and asked her to demonstrate a jump from a military plane. At that time, many Air Corps pilots had already perished, and the Army wanted Tiny to showcase how to safely parachute out of a plane. During the demonstration, Tiny made four jumps at San Diego’s North Island.
“The first three went smoothly, but on the fourth jump, her parachute’s line became tangled in the tail assembly of the plane. Due to high winds, she could not get back into the plane. Instead of panicking, Tiny cut all but a short length of the line, which made her plummet towards the ground. Still keeping a cool head, she pulled the line by hand, freeing the parachute to open by itself. This demonstrated what would be known as the rip cord, and showcased that someone who had to leave an airplane in flight did not need a line attached to the aircraft to open a parachute. A pilot could safely bail out of a damaged craft. Following this, the parachute became known as the life preserver of the air.
“Tiny Broadwick’s last jump was in 1922, when she was just 29 years old. Chronic problems with her ankles forced her into retirement. She stated at the time, “I breathe so much better up there, and it’s so peaceful being that near to God.”
“Tiny received many honors and awards in her lifetime, including the U.S. Government Pioneer Aviation award and the John Glenn Medal. She is one of the few women in the Early Birds of Aviation, and she also received the Gold Wings of the Adventurer’s Club in Los Angeles. In 1964, Tiny was made an honorary member of the 82nd Airborne Division at Ft. Bragg. With that honor, she was told she could jump any time she chose. At the age of 85, Tiny Broadwick died and was buried in her home state of North Carolina.”
ChrispenEvan said:
Georgia Ann Thompson, the first female parachutist and inventor of the rip cord, became famous under the name Tiny Broadwick. She weighed only three pounds at birth in 1893 in North Carolina, and never grew past 5 feet tall and 80 pounds. She married at 12, and bore a daughter, Verla, at 13. After her husband died in an accident, she had to work 14-hour days in a cotton mill.“In 1907 at the North Carolina State Fair, Georgia saw the performance, ‘The Broadwicks and their Famous French Aeronauts.’ The performers ascended to the sky in hot-air balloons, then thrilled spectators by jumping out of them with parachutes. Inspired by this, Georgia asked show owner Charles Broadwick if she could travel with the group and become a part of the act. He agreed to hire her, and Georgia’s mother let her go with a few stipulations- she had to leave Verla behind and send back money to help support her. Broadwick trained her in the art of parachute jumping, and in 1908, legally adopted her. When this happened, Georgia’s name officially became Tiny Broadwick.
“While performing, Tiny was known as “The Doll Girl”. She dressed in ruffled bloomers with pink bows on her arms, ribbons in her long curly hair, and a bonnet on her head. Tiny was just 15 years old when she jumped from a hot-air balloon at the 1908 North Carolina State Fair. Describing her feelings later, she said, “I tell you, honey, it was the most wonderful sensation in the world!” It was a thrill she would come to experience some 1,000 times in her life.“Tiny and Charles Broadwick traveled all over the country with their balloon act, but by 1912, their performance was losing popularity. Fortunately, a new opportunity presented itself to Tiny when she met famed pilot Glenn Martin. He had seen her jump from a balloon, and asked if she would like to parachute from his airplane instead. Tiny immediately agreed to work for Martin, whose aircraft company is still in business today and is operating under the name Martin Marietta.
“In preparation for the jump, Charles Broadwick developed a parachute for Tiny made of silk. It was packed into a knapsack attached to a canvas jacket with harness straps. A string was fastened to the plane’s fuselage and woven through the parachute’s canvas covering. When Tiny jumped from the plane, the cover tore away and her parachute filled with air.
“On her first jump, Tiny was suspended from a trap seat behind the wing and outside the cockpit, with the parachute on a shelf above her. Martin took the plane up to two thousand feet, and then Tiny released a lever alongside the seat, allowing it to drop out from under her. The jump was a success and she landed in Griffith Park in Los Angeles, making her the first woman to parachute from an airplane. After that first jump from Martin’s plane, Tiny was in great demand all over the country. She also became the first woman to parachute into a body of water.
“In 1914, at the start of WWI, representatives of the Army Air Corps visited Tiny in San Diego and asked her to demonstrate a jump from a military plane. At that time, many Air Corps pilots had already perished, and the Army wanted Tiny to showcase how to safely parachute out of a plane. During the demonstration, Tiny made four jumps at San Diego’s North Island.
“The first three went smoothly, but on the fourth jump, her parachute’s line became tangled in the tail assembly of the plane. Due to high winds, she could not get back into the plane. Instead of panicking, Tiny cut all but a short length of the line, which made her plummet towards the ground. Still keeping a cool head, she pulled the line by hand, freeing the parachute to open by itself. This demonstrated what would be known as the rip cord, and showcased that someone who had to leave an airplane in flight did not need a line attached to the aircraft to open a parachute. A pilot could safely bail out of a damaged craft. Following this, the parachute became known as the life preserver of the air.
“Tiny Broadwick’s last jump was in 1922, when she was just 29 years old. Chronic problems with her ankles forced her into retirement. She stated at the time, “I breathe so much better up there, and it’s so peaceful being that near to God.”
“Tiny received many honors and awards in her lifetime, including the U.S. Government Pioneer Aviation award and the John Glenn Medal. She is one of the few women in the Early Birds of Aviation, and she also received the Gold Wings of the Adventurer’s Club in Los Angeles. In 1964, Tiny was made an honorary member of the 82nd Airborne Division at Ft. Bragg. With that honor, she was told she could jump any time she chose. At the age of 85, Tiny Broadwick died and was buried in her home state of North Carolina.”
Interesting. Ta.
>>>> Tiny immediately agreed to work for Martin, whose aircraft company is still in business today and is operating under the name Martin Marietta.
Well out of date. Lockheed Martin now. (Since 1995.)
https://en.wikipedia.org/wiki/Martin_Marietta
Chinese missiles, the new chemtrails?
China’s military purge: Are Chinese missiles filled with water?
Sandboxx
The Great Black Swamp (also known simply as the Black Swamp) was a glacially fed wetland in northwest Ohio and northeast Indiana, United States, that existed from the end of the Wisconsin glaciation until the late 19th century. Comprising extensive swamps and marshes, with some higher, drier ground interspersed, it occupied what was formerly the southwestern part of proglacial Lake Maumee, a Holocene precursor to Lake Erie. The area was about 25 miles (40 km) wide (north to south) and 100 miles (160 km) long, covering an estimated 1,500 square miles (4,000 km2).
https://en.wikipedia.org/wiki/Great_Black_Swamp
I was curious so I had a look at the area with Google Earth, but as I zoomed into the area I was more surprised to see what appeared to be a huge grid over the land. Zoomed in further I found that a vast area of land all around there is partitioned into 1 mine by one mile blocks with roads. Each block has several houses & farms on it.
Something I never knew.
Spiny Norman said:
The Great Black Swamp (also known simply as the Black Swamp) was a glacially fed wetland in northwest Ohio and northeast Indiana, United States, that existed from the end of the Wisconsin glaciation until the late 19th century. Comprising extensive swamps and marshes, with some higher, drier ground interspersed, it occupied what was formerly the southwestern part of proglacial Lake Maumee, a Holocene precursor to Lake Erie. The area was about 25 miles (40 km) wide (north to south) and 100 miles (160 km) long, covering an estimated 1,500 square miles (4,000 km2).Melbourne’s eastern suburbs where I grew up around Glen Waverley are also a mile grid.
https://en.wikipedia.org/wiki/Great_Black_Swamp
I was curious so I had a look at the area with Google Earth, but as I zoomed into the area I was more surprised to see what appeared to be a huge grid over the land. Zoomed in further I found that a vast area of land all around there is partitioned into 1 mine by one mile blocks with roads. Each block has several houses & farms on it.
Something I never knew.
Spiny Norman said:
The Great Black Swamp (also known simply as the Black Swamp) was a glacially fed wetland in northwest Ohio and northeast Indiana, United States, that existed from the end of the Wisconsin glaciation until the late 19th century. Comprising extensive swamps and marshes, with some higher, drier ground interspersed, it occupied what was formerly the southwestern part of proglacial Lake Maumee, a Holocene precursor to Lake Erie. The area was about 25 miles (40 km) wide (north to south) and 100 miles (160 km) long, covering an estimated 1,500 square miles (4,000 km2).
https://en.wikipedia.org/wiki/Great_Black_Swamp
I was curious so I had a look at the area with Google Earth, but as I zoomed into the area I was more surprised to see what appeared to be a huge grid over the land. Zoomed in further I found that a vast area of land all around there is partitioned into 1 mine by one mile blocks with roads. Each block has several houses & farms on it.
Something I never knew.
I was once told by an American teacher friend when I was talking about how most of Australias roads were dirt/gravel, he actually said these words. “In the USA, ever square mile has a bitumen road around it”. He hailed from Kansas City.
OCDC said:
Spiny Norman said:The Great Black Swamp (also known simply as the Black Swamp) was a glacially fed wetland in northwest Ohio and northeast Indiana, United States, that existed from the end of the Wisconsin glaciation until the late 19th century. Comprising extensive swamps and marshes, with some higher, drier ground interspersed, it occupied what was formerly the southwestern part of proglacial Lake Maumee, a Holocene precursor to Lake Erie. The area was about 25 miles (40 km) wide (north to south) and 100 miles (160 km) long, covering an estimated 1,500 square miles (4,000 km2).Melbourne’s eastern suburbs where I grew up around Glen Waverley are also a mile grid.
https://en.wikipedia.org/wiki/Great_Black_Swamp
I was curious so I had a look at the area with Google Earth, but as I zoomed into the area I was more surprised to see what appeared to be a huge grid over the land. Zoomed in further I found that a vast area of land all around there is partitioned into 1 mine by one mile blocks with roads. Each block has several houses & farms on it.
Something I never knew.
Did not know that either, ta.
Spiny Norman said:
OCDC said:It’s great for public transport. Most buses run along the grid so you can get to most places with two buses and <800m walk at either end.Spiny Norman said:Did not know that either, ta.The Great Black Swamp (also known simply as the Black Swamp) was a glacially fed wetland in northwest Ohio and northeast Indiana, United States, that existed from the end of the Wisconsin glaciation until the late 19th century. Comprising extensive swamps and marshes, with some higher, drier ground interspersed, it occupied what was formerly the southwestern part of proglacial Lake Maumee, a Holocene precursor to Lake Erie. The area was about 25 miles (40 km) wide (north to south) and 100 miles (160 km) long, covering an estimated 1,500 square miles (4,000 km2).Melbourne’s eastern suburbs where I grew up around Glen Waverley are also a mile grid.
https://en.wikipedia.org/wiki/Great_Black_Swamp
I was curious so I had a look at the area with Google Earth, but as I zoomed into the area I was more surprised to see what appeared to be a huge grid over the land. Zoomed in further I found that a vast area of land all around there is partitioned into 1 mine by one mile blocks with roads. Each block has several houses & farms on it.
Something I never knew.
I spent from 3 to 22 y o in that grid, homes and educational establishments.
OCDC said:
Spiny Norman said:OCDC said:It’s great for public transport. Most buses run along the grid so you can get to most places with two buses and <800m walk at either end.Melbourne’s eastern suburbs where I grew up around Glen Waverley are also a mile grid.Did not know that either, ta.
I spent from 3 to 22 y o in that grid, homes and educational establishments.
I spent from birth (at Box Hill Hospital) to 22 just above the top edge of that map. But 20 years before you were there. My aunt and uncle (still) live in Headingly Rd.
Spiny Norman said:
The Great Black Swamp (also known simply as the Black Swamp) was a glacially fed wetland in northwest Ohio and northeast Indiana, United States, that existed from the end of the Wisconsin glaciation until the late 19th century. Comprising extensive swamps and marshes, with some higher, drier ground interspersed, it occupied what was formerly the southwestern part of proglacial Lake Maumee, a Holocene precursor to Lake Erie. The area was about 25 miles (40 km) wide (north to south) and 100 miles (160 km) long, covering an estimated 1,500 square miles (4,000 km2).
https://en.wikipedia.org/wiki/Great_Black_Swamp
I was curious so I had a look at the area with Google Earth, but as I zoomed into the area I was more surprised to see what appeared to be a huge grid over the land. Zoomed in further I found that a vast area of land all around there is partitioned into 1 mine by one mile blocks with roads. Each block has several houses & farms on it.
Something I never knew.
Some areas in the northwestern part of the USA have these checkerboard style deforestation patterns. When I first saw it I thought it was some issue with the satellite imagery.
NASA Captain Elizabeth commanding SOFIA: ex Pan Am B747SP Flying Telescope.
Substantial water ice deposits on Mars.
https://www.physics-astronomy.com/water-ice-mars-equator-discovered/
Aussie farmers learn to harvest hemp, ‘toughest plant on the planet’ 🌿 | Landline | ABC Australia
Hemp has long been proclaimed a wonder plant. And for just as long demonised as a narcotic. But it’s the fibre — not the leaf or seed — that’s now attracting some serious investment. Landline’s Tim Lee has the story.
Atlantropa: The $1 Trillion Dam to Drain the Mediterranean.
Spiny Norman said:
Atlantropa: The $1 Trillion Dam to Drain the Mediterranean.
Why did he want to do it?, they ask.
Simple: he was German.
Spiny Norman said:
Aussie farmers learn to harvest hemp, ‘toughest plant on the planet’ 🌿 | Landline | ABC AustraliaHemp has long been proclaimed a wonder plant. And for just as long demonised as a narcotic. But it’s the fibre — not the leaf or seed — that’s now attracting some serious investment. Landline’s Tim Lee has the story.
There are two useful products to get out of the stems, the fibre and the hurd.
party_pants said:
Spiny Norman said:
Aussie farmers learn to harvest hemp, ‘toughest plant on the planet’ 🌿 | Landline | ABC AustraliaHemp has long been proclaimed a wonder plant. And for just as long demonised as a narcotic. But it’s the fibre — not the leaf or seed — that’s now attracting some serious investment. Landline’s Tim Lee has the story.
There are two useful products to get out of the stems, the fibre and the hurd.
thumb thumb h thumb thumb thumb u thumb thumb thumb r thumb thumb……………….
VH-VGJ Sydney Australia 22 JAN 2024
Spiny Norman said:
Aussie farmers learn to harvest hemp, ‘toughest plant on the planet’ 🌿 | Landline | ABC AustraliaHemp has long been proclaimed a wonder plant. And for just as long demonised as a narcotic. But it’s the fibre — not the leaf or seed — that’s now attracting some serious investment. Landline’s Tim Lee has the story.
https://www.youtube.com/watch?v=4dFvHicFoRI
Andrew Hamilton grew up in the far north shore of Sydney. He had a good upbringing, but found himself convicted for selling a large commercial quantity of magic mushrooms, LSD and the supply of MDMA.
A self proclaimed ‘Mushroom King’, Andrew sold shrooms for over a decade before getting arrested.
After doing time in prison, Andrew has found a passion in stand up comedy and is travelling around Australia making people laugh.
The power of laughter which he experienced in a maximum security prison was the light-bulb moment that took Andrew from the cell to the stages.
https://www.youtube.com/watch?v=UG5p644biLg
Worth a watch.
Spiny Norman said:
Andrew Hamilton grew up in the far north shore of Sydney. He had a good upbringing, but found himself convicted for selling a large commercial quantity of magic mushrooms, LSD and the supply of MDMA.A self proclaimed ‘Mushroom King’, Andrew sold shrooms for over a decade before getting arrested.
After doing time in prison, Andrew has found a passion in stand up comedy and is travelling around Australia making people laugh.
The power of laughter which he experienced in a maximum security prison was the light-bulb moment that took Andrew from the cell to the stages.
https://www.youtube.com/watch?v=UG5p644biLg
Worth a watch.
‘pends on how long it goes on for.
Space coffee!
What were Hitler’s Relatives Up to During and After WWII?
The Murchison meteorite is a meteorite that fell in Australia in 1969 near Murchison, Victoria. It belongs to the carbonaceous chondrite class, a group of meteorites rich in organic compounds. Due to its mass (over 100 kg or 220 lb) and the fact that it was an observed fall, the Murchison meteorite is one of the most studied of all meteorites.
In January 2020, cosmochemists reported that the oldest material found on Earth to date are the silicon carbide particles from the Murchison meteorite, which have been determined to be 7 billion years old, about 2.5 billion years older than the 4.54-billion-year age of the Earth and the Solar System. The published study noted that “dust lifetime estimates mainly rely on sophisticated theoretical models. These models, however, focus on the more common small dust grains and are based on assumptions with large uncertainties.”
https://en.wikipedia.org/wiki/Murchison_meteorite
Quite remarkable, likely to be seven billion years old!
An American chap bought a 2 kW laser.
It’s insanely dangerous!
Spiny Norman said:
An American chap bought a 2 kW laser.
It’s insanely dangerous!
Damn
How a rainfall simulator saves millions of lives.
Veritasium>
Spiny Norman said:
How a rainfall simulator saves millions of lives.
Veritasium>
QI, but the suggestion that this particular facility is saving millions of lives is stretching things just a little.
JudgeMental said:
https://www.atlasobscura.com/articles/cia-issued-rectal-tool-kitfor fixing your rectal.
I think i need one of those…
captain_spalding said:
JudgeMental said:
https://www.atlasobscura.com/articles/cia-issued-rectal-tool-kitfor fixing your rectal.
I think i need one of those…
get the one with a pellet of Uranium in it.
captain_spalding said:
JudgeMental said:
https://www.atlasobscura.com/articles/cia-issued-rectal-tool-kitfor fixing your rectal.
I think i need one of those…
Um, aren’t you experiencing enough butt pain already?
kii said:
captain_spalding said:
JudgeMental said:
https://www.atlasobscura.com/articles/cia-issued-rectal-tool-kitfor fixing your rectal.
I think i need one of those…
Um, aren’t you experiencing enough butt pain already?
Actually, not doing too badly today, thanks for asking. Best i’ve felt for about a week.
Maybe i should look at the link, and see what we’re actually talking about.
As we thank the Ingenuity helicopter for its many years of service on Mars, we should note that, while JPL’s copter made the first powered flight in another planetary atmosphere, it was not the first to make any sustained flight in an extraterrestrial atmosphere. That honor goes to the Soviet Vega 1 and 2 spacecraft, launched in 1984. In a remarkable 3-in-1 mission objective, each Vega spacecraft arrived at Venus around mid-1985, dropped down a Venera-class lander, which in turn deployed aerobots.
These were atmospheric probes that opened a helium balloon to float about 54 km above the surface, transmitting wind, temperature and atmospheric analyses until battery power ran out. While the Vega 1 lander landed but could send no useful surface data, its sister lander sent good data about soil, temperature and atmosphere for 56 minutes. The two orbiters then departed Venus to rendezvous with Comet Halley by 1986, as part of the “Halley Armada” with other spacecraft from ESA and the Japanese space agencies of the time.
A rather odd one – Dassault Falcon 20 trials with afterburner.
Spiny Norman said:
A rather odd one – Dassault Falcon 20 trials with afterburner.
You’ve said it yourself: ‘everything’s better with afterburners’.
Speaking of afterburners:
Pop Science:
Boeing built an unusual training device known as “Waddell’s Wagon” (named for a 747 test pilot, Jack Waddell) that consisted of a mock-up cockpit mounted on the roof of a truck. While the first 747s were still being built, the device allowed pilots to practice taxi maneuvers from a high upper-deck position. -wikipedia Boeing 747
esselte said:
Boeing built an unusual training device known as “Waddell’s Wagon” (named for a 747 test pilot, Jack Waddell) that consisted of a mock-up cockpit mounted on the roof of a truck. While the first 747s were still being built, the device allowed pilots to practice taxi maneuvers from a high upper-deck position. -wikipedia Boeing 747
Did it actually work? Like did the movements match the actions of the pilot?
Man-carrying pod used on U.S. P-38 Lightning during WWII
https://theaviationist.com/2013/12/13/p-38-exint-pod-photo/
Also:
https://combatace.com/forums/topic/95655-human-transport-by-fighter-planes-exint-pod/
dv said:
esselte said:Boeing built an unusual training device known as “Waddell’s Wagon” (named for a 747 test pilot, Jack Waddell) that consisted of a mock-up cockpit mounted on the roof of a truck. While the first 747s were still being built, the device allowed pilots to practice taxi maneuvers from a high upper-deck position. -wikipedia Boeing 747
Did it actually work? Like did the movements match the actions of the pilot?
Yep. They designed the steering so that it’d largely follow the movements of the much larger aircraft. There were limits though as it’s pretty much impossible to simulate near-stationary tight turns in a rig like that – The main wheels are about 30 metres behind the nosewheel. In real life it takes a little getting used to, to drive them around on the ground, as your eye height is quite high and you can’t see anything directly in front of the nose for a good 20 – 25 metres. FWIW the nosewheel basically sits under where the Flight Engineer’s seat is.
Spiny Norman said:
dv said:
esselte said:Boeing built an unusual training device known as “Waddell’s Wagon” (named for a 747 test pilot, Jack Waddell) that consisted of a mock-up cockpit mounted on the roof of a truck. While the first 747s were still being built, the device allowed pilots to practice taxi maneuvers from a high upper-deck position. -wikipedia Boeing 747
Did it actually work? Like did the movements match the actions of the pilot?
Yep. They designed the steering so that it’d largely follow the movements of the much larger aircraft. There were limits though as it’s pretty much impossible to simulate near-stationary tight turns in a rig like that – The main wheels are about 30 metres behind the nosewheel. In real life it takes a little getting used to, to drive them around on the ground, as your eye height is quite high and you can’t see anything directly in front of the nose for a good 20 – 25 metres. FWIW the nosewheel basically sits under where the Flight Engineer’s seat is.
Well that’s tidy.
Spiny Norman said:
dv said:
esselte said:Boeing built an unusual training device known as “Waddell’s Wagon” (named for a 747 test pilot, Jack Waddell) that consisted of a mock-up cockpit mounted on the roof of a truck. While the first 747s were still being built, the device allowed pilots to practice taxi maneuvers from a high upper-deck position. -wikipedia Boeing 747
Did it actually work? Like did the movements match the actions of the pilot?
Yep. They designed the steering so that it’d largely follow the movements of the much larger aircraft. There were limits though as it’s pretty much impossible to simulate near-stationary tight turns in a rig like that – The main wheels are about 30 metres behind the nosewheel. In real life it takes a little getting used to, to drive them around on the ground, as your eye height is quite high and you can’t see anything directly in front of the nose for a good 20 – 25 metres. FWIW the nosewheel basically sits under where the Flight Engineer’s seat is.
Just to add to what Spiny said, this purports to be a wayback machine capture from boeing.com, and it says that the pilots directed the truck driver below by radio.
https://web.archive.org/web/20100316193220/http://www.boeing.com/history/boeing/747.html
esselte said:
Spiny Norman said:
dv said:Did it actually work? Like did the movements match the actions of the pilot?
Yep. They designed the steering so that it’d largely follow the movements of the much larger aircraft. There were limits though as it’s pretty much impossible to simulate near-stationary tight turns in a rig like that – The main wheels are about 30 metres behind the nosewheel. In real life it takes a little getting used to, to drive them around on the ground, as your eye height is quite high and you can’t see anything directly in front of the nose for a good 20 – 25 metres. FWIW the nosewheel basically sits under where the Flight Engineer’s seat is.
Just to add to what Spiny said, this purports to be a wayback machine capture from boeing.com, and it says that the pilots directed the truck driver below by radio.
https://web.archive.org/web/20100316193220/http://www.boeing.com/history/boeing/747.html
With a bit of practice I could get the nosewheels to within about 50 mm left/right of where I wanted them. There was a part of the control column that I’d visually line up the centreline on and it’d be quite close. Not as good fore/aft but there was always a marshaller or guide lights to tell you when to stop.
Best one was at Charles de Gaule once – Where we were going to park we were marshalled in by a lovely French lass, who performed very impressive gymnastics as she was walking backwards to the parking spot, as there were the big tow-bars and a few other sundry machines in her way but she literally took it all in her stride. We were very impressed and applauded her from the cockpit windows. She took a deserved bow over that.
esselte said:
Man-carrying pod used on U.S. P-38 Lightning during WWII
https://theaviationist.com/2013/12/13/p-38-exint-pod-photo/
Also:
https://combatace.com/forums/topic/95655-human-transport-by-fighter-planes-exint-pod/
BOAC operated de Havilland Mosquitos during WW2, particularly between the UK and Sweden.
It seems that their passengers travelled in comparative comfort, spread out on a mattress in the bomb bay, with blankets, their own oxygen mask, and a reading light.
LOL landing on a trampoline…
de Havilland Sea Vampire lands wheels-up on a flexible deck installed on HMS Warrior in late 1948
https://www.youtube.com/watch?v=XzrAnMvh-HM&t=1s
An idea tested, but never put into service, was the flexible or inflated, air-cushioned, “rubber deck”. In the early jet age it was recognized that eliminating the landing gear for carrier borne aircraft would improve the flight performance and range, since the space taken by the landing gear could be used to hold additional fuel tanks. This led to the concept of a deck that would absorb the energy of landing.
With the introduction of jet aircraft the risk of damaging propellers was no longer an issue, though take off would require some sort of launching cradle. Tests were carried out with a de Havilland Sea Vampire flown by test pilot Eric “Winkle” Brown onto a flexible deck fitted to HMS Warrior.
The deck consisted of a rubberized sheet fully supported on multiple layers of pressurized fire hose. Supermarine designed its Type 508 for rubber deck landings. The flexible deck idea was found to be technically feasible but was abandoned, as the weight of carrier aircraft increased and there were always doubts about the ability of an average pilot to land in this way.
That reminds me… what kind of electrical insulation is most fire resistant?
esselte said:
The flexible deck idea was found to be technically feasible but was abandoned, as the weight of carrier aircraft increased and there were always doubts about the ability of an average pilot to land in this way.
A rare instance of sanity eventually prevailing.
esselte said:
The flexible deck idea was found to be technically feasible but was abandoned, as the weight of carrier aircraft increased and there were always doubts about the ability of an average pilot to land in this way.
That, and the flight deck would be blocked for far longer than if using a conventional wire arrester system. The gearless plane would have to be either dragged out of the way by a tractor or lifted up by a crane onto a small trolley to make it easier to move it around, again with a tractor.
dv said:
That reminds me… what kind of electrical insulation is most fire resistant?
air most likely.
dv said:
That reminds me… what kind of electrical insulation is most fire resistant?
Asbestos?
Spiny Norman said:
dv said:
That reminds me… what kind of electrical insulation is most fire resistant?
Asbestos?
With Pryogel heat insulation.
Spiny Norman said:
Spiny Norman said:
dv said:
That reminds me… what kind of electrical insulation is most fire resistant?
Asbestos?
With Pryogel heat insulation.
Cheers
A low pressure system of around 1000 hPa hovering around the Coral Sea for next few days.
The next cyclone?
This popped up in my YT feed, I thought it was quite interesting and I was surprised at the percentage of intersex people around ~ 1.7% to 1.9%.
“I was born ‘Male’ but I’m not Trans | Interesting & SeXY : Episode 1”
One of the very clever people that developed the Large Language Model that AI is based on is an Aussie.
ChatGPT Forms New Ideas, says Jeremy Howard | AI vs Human.
Spiny Norman said:
This popped up in my YT feed, I thought it was quite interesting and I was surprised at the percentage of intersex people around ~ 1.7% to 1.9%.“I was born ‘Male’ but I’m not Trans | Interesting & SeXY : Episode 1”
One of the original forum members was intersex.
kii said:
Spiny Norman said:
This popped up in my YT feed, I thought it was quite interesting and I was surprised at the percentage of intersex people around ~ 1.7% to 1.9%.“I was born ‘Male’ but I’m not Trans | Interesting & SeXY : Episode 1”
One of the original forum members was intersex.
I reckon I probably know a few, they just haven’t mentioned it.
Spiny Norman said:
kii said:Isn’t it strange how in more enlightened societies people care about people themselves more than what’s in their pants?Spiny Norman said:I reckon I probably know a few, they just haven’t mentioned it.This popped up in my YT feed, I thought it was quite interesting and I was surprised at the percentage of intersex people around ~ 1.7% to 1.9%.One of the original forum members was intersex.“I was born ‘Male’ but I’m not Trans | Interesting & SeXY : Episode 1”
OCDC said:
Spiny Norman said:kii said:Isn’t it strange how in more enlightened societies people care about people themselves more than what’s in their pants?One of the original forum members was intersex.I reckon I probably know a few, they just haven’t mentioned it.
They also have less children, is there a correlation?
roughbarked said:
OCDC said:What a fucking stupid response.Spiny Norman said:They also have less children, is there a correlation?I reckon I probably know a few, they just haven’t mentioned it.Isn’t it strange how in more enlightened societies people care about people themselves more than what’s in their pants?
Spiny Norman said:
kii said:
Spiny Norman said:
This popped up in my YT feed, I thought it was quite interesting and I was surprised at the percentage of intersex people around ~ 1.7% to 1.9%.“I was born ‘Male’ but I’m not Trans | Interesting & SeXY : Episode 1”
One of the original forum members was intersex.
I reckon I probably know a few, they just haven’t mentioned it.
Yep, it was mentioned to me because another former forum member was being very rude about various things during the gay marriage referendum. I presented as a safe person to talk to in the aftermath.
OCDC said:
Spiny Norman said:kii said:Isn’t it strange how in more enlightened societies people care about people themselves more than what’s in their pants?One of the original forum members was intersex.I reckon I probably know a few, they just haven’t mentioned it.
I’m not wearing pants. or a shirt. I am decent though. I have boxers on. so you can all relax.
JudgeMental said:
OCDC said:Phew!Spiny Norman said:I’m not wearing pants. or a shirt. I am decent though. I have boxers on. so you can all relax.I reckon I probably know a few, they just haven’t mentioned it.Isn’t it strange how in more enlightened societies people care about people themselves more than what’s in their pants?
kii said:
Spiny Norman said:
kii said:One of the original forum members was intersex.
I reckon I probably know a few, they just haven’t mentioned it.
Yep, it was mentioned to me because another former forum member was being very rude about various things during the gay marriage referendum. I presented as a safe person to talk to in the aftermath.
You did well.
You’d hope that in a group like ours, people would be compassionate with people outside the norm.
JudgeMental said:
OCDC said:
Spiny Norman said:I reckon I probably know a few, they just haven’t mentioned it.Isn’t it strange how in more enlightened societies people care about people themselves more than what’s in their pants?
I’m not wearing pants. or a shirt. I am decent though. I have boxers on. so you can all relax.
I broadly speaking am also decent
Spiny Norman said:
One of the very clever people that developed the Large Language Model that AI is based on is an Aussie.ChatGPT Forms New Ideas, says Jeremy Howard | AI vs Human.
Hmm
Something I had no knowledge of before today – Towed active decoys have been used in the US Air Force for a few years and the F-35 has four onboard.
Why you can’t shoot the F-35 down (even if you lock onto it)
Sandboxx
Spiny Norman said:
Something I had no knowledge of before today – Towed active decoys have been used in the US Air Force for a few years and the F-35 has four onboard.Why you can’t shoot the F-35 down (even if you lock onto it)
Sandboxx
I am aware that they have been deployed for that very reason, somewhere in the back of my brane but otherwise I was ignorant of the facts above.
Spiny Norman said:
Something I had no knowledge of before today – Towed active decoys have been used in the US Air Force for a few years and the F-35 has four onboard.Why you can’t shoot the F-35 down (even if you lock onto it)
Sandboxx
I watched that with ‘closed captions’ on, and the captions kept referring to ‘toad decoys’ and ‘toad defensive systems’, which conjured images of cane toads travelling at supersonic speed, approaching the target with that lugubrious expression they have, and thinking, ‘that’d be right, it’s just a bloody decoy’.
captain_spalding said:
Spiny Norman said:
Something I had no knowledge of before today – Towed active decoys have been used in the US Air Force for a few years and the F-35 has four onboard.Why you can’t shoot the F-35 down (even if you lock onto it)
SandboxxI watched that with ‘closed captions’ on, and the captions kept referring to ‘toad decoys’ and ‘toad defensive systems’, which conjured images of cane toads travelling at supersonic speed, approaching the target with that lugubrious expression they have, and thinking, ‘that’d be right, it’s just a bloody decoy’.
:)
Mt Etna.
It also made me think of methods like ‘range gate stealing’, the old AN/ALQ-99 ECM pods, and how the older Russian CW radars enjoyed something of a renaissance as they were found to be immune from a lot of the various spoofing techniques.
captain_spalding said:
Spiny Norman said:
Something I had no knowledge of before today – Towed active decoys have been used in the US Air Force for a few years and the F-35 has four onboard.Why you can’t shoot the F-35 down (even if you lock onto it)
SandboxxI watched that with ‘closed captions’ on, and the captions kept referring to ‘toad decoys’ and ‘toad defensive systems’, which conjured images of cane toads travelling at supersonic speed, approaching the target with that lugubrious expression they have, and thinking, ‘that’d be right, it’s just a bloody decoy’.
I got caught up in spoofing.
Spiny Norman said:
Mt Etna.
That’s a great photo.
captain_spalding said:
It also made me think of methods like ‘range gate stealing’, the old AN/ALQ-99 ECM pods, and how the older Russian CW radars enjoyed something of a renaissance as they were found to be immune from a lot of the various spoofing techniques.
Like how a lot of the avionics on some of the Soviet aircraft still used the old valves instead of transistors, as they could handle the EMP from a nuclear blast much better. Or so the rumour goes.
Interesting gear on all sides really.
You’ve Seen This Face Before (The Reason Is Really Creepy) | Tales From the Bottle
Qxir
The convoluted story of the search for Jack the Ripper.
One of the best horror/sci-fi movies ever made, John Carpenter’s The Thing.
Not just a simple monster hack & slash movie, it has some very clever complexities.
Spiny Norman said:
One of the best horror/sci-fi movies ever made, John Carpenter’s The Thing.
Not just a simple monster hack & slash movie, it has some very clever complexities.
Quite good practical effects too
La Riconada, the highest permanent human settlement on Earth. 5,100 metres up.
The Race to Save the Panama Canal.
Climate change in action.
What happens to astronauts during space station reboosts? Crew demonstrates.
Spiny Norman said:
What happens to astronauts during space station reboosts? Crew demonstrates.
Wonder if her hair ever gets tangled in the infrastructure.
Why Russia Tried to Block This Canal.
The Vistula Canal is more than just a piece of infrastructure.
Spiny Norman said:
Why Russia Tried to Block This Canal.
The Vistula Canal is more than just a piece of infrastructure.
I’ve no doubt that the Poles didn’t give a toss about the ‘economic viability’ of the canal, and gave a lot more weight to just annoying the Russians, and taking away from them just a little bit more of their relevance.
I’m also impressed that the Poles did the job for $450 million, even if they were US dollars..
Something like that in Australia would have probably had a quote prices of twice as much, and suffered numerous ‘cost overruns’ (i.e. this project is half-completed, and we’re holding it for ransom) during its execution.
From Space to Jail: NASA’s Craziest Story | Tales From the Bottle
Qxir
I haven’t watched this past the first 20 seconds. I don’t know if I want to.
Skydiver FORGETS parachute, films his own fatal fall.
AussieDJ said:
I haven’t watched this past the first 20 seconds. I don’t know if I want to.Skydiver FORGETS parachute, films his own fatal fall.
I don’t know, I think if it was me, I’d force myself to have a quiet chuckle about such a basic mistake, as I hurtled towards my doom.
“You’ve got to laugh, else you’d cry.”
AussieDJ said:
I haven’t watched this past the first 20 seconds. I don’t know if I want to.Skydiver FORGETS parachute, films his own fatal fall.
There’s nothimg to see after the first 20 seconds. The same sequence is repeated over and over until the speaker stops talking.
roughbarked said:
AussieDJ said:
I haven’t watched this past the first 20 seconds. I don’t know if I want to.Skydiver FORGETS parachute, films his own fatal fall.
There’s nothimg to see after the first 20 seconds. The same sequence is repeated over and over until the speaker stops talking.
Thanks. Saved me from watching it.
Sorry to have wasted almost four minutes of your life.
AussieDJ said:
roughbarked said:
AussieDJ said:
I haven’t watched this past the first 20 seconds. I don’t know if I want to.Skydiver FORGETS parachute, films his own fatal fall.
There’s nothimg to see after the first 20 seconds. The same sequence is repeated over and over until the speaker stops talking.
Thanks. Saved me from watching it.
Sorry to have wasted almost four minutes of your life.
He didn’t forget to pull the cord, he forget to even wear a parachute, which is a pretty basic oversight when you jump out of an aeroplane.
Nobody else noticed either, presumably because his backpack with the camera in it looked like a parachute.
AussieDJ said:
roughbarked said:
AussieDJ said:
I haven’t watched this past the first 20 seconds. I don’t know if I want to.Skydiver FORGETS parachute, films his own fatal fall.
There’s nothimg to see after the first 20 seconds. The same sequence is repeated over and over until the speaker stops talking.
Thanks. Saved me from watching it.
Sorry to have wasted almost four minutes of your life.
:) it is after all only a few minutes and I did indeed skip most of it.
Bubblecar said:
AussieDJ said:
roughbarked said:There’s nothimg to see after the first 20 seconds. The same sequence is repeated over and over until the speaker stops talking.
Thanks. Saved me from watching it.
Sorry to have wasted almost four minutes of your life.
He didn’t forget to pull the cord, he forget to even wear a parachute, which is a pretty basic oversight when you jump out of an aeroplane.
Nobody else noticed either, presumably because his backpack with the camera in it looked like a parachute.
It is a great reminder for practicing risk management.
The difficult engineering behind making a useable blue LED, and the very persistent Japanese chap behind it.
Spiny Norman said:
The difficult engineering behind making a useable blue LED, and the very persistent Japanese chap behind it.
Yes
OpenAI Just Changed Video Forever
Pretty darn impressive.
What Would Happen If Betelgeuse Burst Right Now?
Spiny Norman said:
OpenAI Just Changed Video ForeverPretty darn impressive.
Yeah like this six fingered girl?
Starship Hot Staging: More Complex Than You Think!
Quite a lot of light technical & engineering talk here. I found it very interesting.
The Piasecki VZ-8 Airgeep (company designation PA-59) was a prototype vertical takeoff and landing (VTOL) aircraft developed by Piasecki Aircraft. The Airgeep was developed to fulfill a U.S. Army Transportation Research Command contract for a flying jeep in 1957. The flying jeep was envisioned to be smaller and easier to fly than a helicopter.
https://en.wikipedia.org/wiki/Piasecki_VZ-8_Airgeep
I know there’s a microplastics thread back from last year somewhere, can’t be arsed finding it.
Of interest – Microplastics: The Hidden Health Crisis
https://www.youtube.com/watch?v=4XDLSqn0dCk
Bogsnorkler said:
https://en.wikipedia.org/wiki/Mima_mounds
Yes, quite interesting. Their origin is somewhat controversial IIRC, with a few different theories, but not quite enough evidence for each.
The Trillion Dollar Equation.
The most famous equation in finance, the Black-Scholes/Merton equation, came from physics. It launched an industry worth trillions of dollars and led to the world’s best investments.
Veritasium.
50hrs in The Most Nuked Place on Earth Erased from Maps.
Some of the lesser-know parts of Soviet history.
Spiny Norman said:
50hrs in The Most Nuked Place on Earth Erased from Maps.
Some of the lesser-know parts of Soviet history.
Looks like fun, not really.
A rare ‘blue jet’ coming out the top of a thunderstorm.
These Shapes Can Trace Out ANY Line.
Rather clever I thought.
Brownian motion was the first visual evidence of Atoms and Molecules. Einstein was able to show that the mass of atoms could be calculated by watching the particles jiggle.
This Way Toward Enemy – How The Bomb Didn’t Quite Go Boom.
A short history of nuclear weapon accidents. And it’s terrifying.
The Controversial Sound Only 2% Of People Hear.
Since the early 1960’s, an increasing number of people have been hearing (and feeling) a sound causing everything from annoyance to psychosis to death. We have a deeply objective look at what could be causing it.
Spiny Norman said:
The Controversial Sound Only 2% Of People Hear.
Since the early 1960’s, an increasing number of people have been hearing (and feeling) a sound causing everything from annoyance to psychosis to death. We have a deeply objective look at what could be causing it.
interesting.
Spiny Norman said:
The Controversial Sound Only 2% Of People Hear.
Since the early 1960’s, an increasing number of people have been hearing (and feeling) a sound causing everything from annoyance to psychosis to death. We have a deeply objective look at what could be causing it.
Hmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm
Bell’s Theorem: The Quantum Venn Diagram Paradox.
This video is about Bell’s Theorem, one of the most fascinating results in 20th century physics. Even though Albert Einstein (together with collaborators in the EPR Paradox paper) wanted to show that quantum mechanics must be incomplete because it was nonlocal (he didn’t like “spooky action at a distance”), John Bell managed to prove that any local real hidden variable theory would have to satisfy certain simple statistical properties that quantum mechanical experiments (and the theory that describes them) violate. Since then, GHZ and others have managed to extend the theoretical work, and Alain Aspect performed the first Bell test experiment in the late 1980s.
https://www.youtube.com/watch?v=zcqZHYo7ONs
Spiny Norman said:
The Controversial Sound Only 2% Of People Hear.
Since the early 1960’s, an increasing number of people have been hearing (and feeling) a sound causing everything from annoyance to psychosis to death. We have a deeply objective look at what could be causing it.
Thanks. Never heard of this before. Could the Cuban Embassy noise be related?
Michael V said:
Spiny Norman said:
The Controversial Sound Only 2% Of People Hear.
Since the early 1960’s, an increasing number of people have been hearing (and feeling) a sound causing everything from annoyance to psychosis to death. We have a deeply objective look at what could be causing it.Thanks. Never heard of this before. Could the Cuban Embassy noise be related?
I’m not sure but I don’t think so.
The Oldest Unsolved Problem in Maths.
Do odd perfect numbers exist?
How Physicists FINALLY Solved the Feynman Sprinkler Problem.
Spiny Norman said:
How Physicists FINALLY Solved the Feynman Sprinkler Problem.
Didn’t we discuss this here recently?
Anyway, from TATE:
Link
“Solution
The behavior of the reverse sprinkler is qualitatively quite distinct from that of the ordinary sprinkler, and one does not behave like the other “played backwards”. Most of the published theoretical treatments of this problem have concluded that the ideal reverse sprinkler will not experience any torque in its steady state. This may be understood in terms of conservation of angular momentum: in its steady state, the amount of angular momentum carried by the incoming fluid is constant, which implies that there is no torque on the sprinkler itself.
Alternatively, in terms of forces on an individual sprinkler nozzle, consider Mach’s illustration. There is:
the reaction force on the nozzle as it sucks in the fluid, pulling the nozzle anti-clockwise;
the inflowing water impacting on the inside of the nozzle, pushing the nozzle clockwise.
These two forces are equal and opposite, so sucking in the fluid causes no net force on the sprinkler nozzle. This is similar to the pop pop boat when it sucks in water—the inflowing water transfers its momentum to the boat, so sucking in water causes no net force on the boat.
Many experiments, going back to Mach, find no rotation of the reverse sprinkler. In setups with sufficiently low friction and high rate of inflow, the reverse sprinkler has been seen to turn weakly in the opposite sense to the conventional sprinkler, even in its steady state. Such behavior could be explained by the diffusion of momentum in a non-ideal (i.e., viscous) flow. However, careful observation of experimental setups shows that this turning is associated with the formation of a vortex inside the body of the sprinkler. An analysis of the actual distribution of forces and pressure in a non-ideal reverse sprinkler provides the theoretical basis to explain this:
Differences in the regions over which internal and external forces act constitute a force-couple with different moment arms consistent with reverse rotation. … the resulting flow-field asymmetry developed downstream from the sprinkler-arm bends supports the role of vortices in reverse sprinkler rotation by suggesting a mechanism for generating vortices in a consistent direction.”
Suggesting that the recent publication “finally solves the problem” seems to me to be stretching things just a little.
The Rev Dodgson said:
Spiny Norman said:
How Physicists FINALLY Solved the Feynman Sprinkler Problem.
Didn’t we discuss this here recently?
Anyway, from TATE:
Link“Solution
The behavior of the reverse sprinkler is qualitatively quite distinct from that of the ordinary sprinkler, and one does not behave like the other “played backwards”. Most of the published theoretical treatments of this problem have concluded that the ideal reverse sprinkler will not experience any torque in its steady state. This may be understood in terms of conservation of angular momentum: in its steady state, the amount of angular momentum carried by the incoming fluid is constant, which implies that there is no torque on the sprinkler itself.Alternatively, in terms of forces on an individual sprinkler nozzle, consider Mach’s illustration. There is:
the reaction force on the nozzle as it sucks in the fluid, pulling the nozzle anti-clockwise;
the inflowing water impacting on the inside of the nozzle, pushing the nozzle clockwise.
These two forces are equal and opposite, so sucking in the fluid causes no net force on the sprinkler nozzle. This is similar to the pop pop boat when it sucks in water—the inflowing water transfers its momentum to the boat, so sucking in water causes no net force on the boat.Many experiments, going back to Mach, find no rotation of the reverse sprinkler. In setups with sufficiently low friction and high rate of inflow, the reverse sprinkler has been seen to turn weakly in the opposite sense to the conventional sprinkler, even in its steady state. Such behavior could be explained by the diffusion of momentum in a non-ideal (i.e., viscous) flow. However, careful observation of experimental setups shows that this turning is associated with the formation of a vortex inside the body of the sprinkler. An analysis of the actual distribution of forces and pressure in a non-ideal reverse sprinkler provides the theoretical basis to explain this:
Differences in the regions over which internal and external forces act constitute a force-couple with different moment arms consistent with reverse rotation. … the resulting flow-field asymmetry developed downstream from the sprinkler-arm bends supports the role of vortices in reverse sprinkler rotation by suggesting a mechanism for generating vortices in a consistent direction.”
Suggesting that the recent publication “finally solves the problem” seems to me to be stretching things just a little.
Just put it in nonnewtonian fluid then talk.
How The Most Expensive Swords In The World Are Made.
This is a video about how Japanese swords are made – from the gathering of the iron sand, to the smelting of the steel, to the forging of the blade.
Veritasium.
How to Destroy a Nuke Anywhere on Earth.
Nuclear weapons are the most terrifying invention of humanity. Could our genius to create such weapons also end them? Today we explore how neutrinos could be used to do just that, fizzling out nukes anywhere on Earth and with no defence.
Spiny Norman said:
How to Destroy a Nuke Anywhere on Earth.Nuclear weapons are the most terrifying invention of humanity. Could our genius to create such weapons also end them? Today we explore how neutrinos could be used to do just that, fizzling out nukes anywhere on Earth and with no defence.
Elon will just move ‘em to Mars.
A NEW Trace! The FULL MH370 Story…So Far.
How can a Boeing 777, one of the biggest and most modern aircraft in the world, just vanish without a trace…?
…It can’t……EVERYTHING LOST…… leaves a trace.
This is the story about Malaysian Airlines flight MH370 and what we now know.
———————-
The interesting part starts at about 46 minutes, and I hope that another search for the wreckage is undertaken based on this new data.
Spiny Norman said:
A NEW Trace! The FULL MH370 Story…So Far.
How can a Boeing 777, one of the biggest and most modern aircraft in the world, just vanish without a trace…?…It can’t……EVERYTHING LOST…… leaves a trace.
This is the story about Malaysian Airlines flight MH370 and what we now know.
———————-The interesting part starts at about 46 minutes, and I hope that another search for the wreckage is undertaken based on this new data.
Haven’t watched the Youtube yet, but…would we be likely to learn much from the wreck, if it’s found?
Certainly, there might be info about what state it was in when it disappeared beneath the waves, but will it be likely to reveal much as to how it came to be there, what the motivations of its pilot(s) were, or what might have affected them to permit this to happen?
I’m not saying ‘don’t bother looking’, but is it likely to fill in many of the blanks?
captain_spalding said:
Spiny Norman said:
A NEW Trace! The FULL MH370 Story…So Far.
How can a Boeing 777, one of the biggest and most modern aircraft in the world, just vanish without a trace…?…It can’t……EVERYTHING LOST…… leaves a trace.
This is the story about Malaysian Airlines flight MH370 and what we now know.
———————-The interesting part starts at about 46 minutes, and I hope that another search for the wreckage is undertaken based on this new data.
Haven’t watched the Youtube yet, but…would we be likely to learn much from the wreck, if it’s found?
Certainly, there might be info about what state it was in when it disappeared beneath the waves, but will it be likely to reveal much as to how it came to be there, what the motivations of its pilot(s) were, or what might have affected them to permit this to happen?
I’m not saying ‘don’t bother looking’, but is it likely to fill in many of the blanks?
It depends on a few things.
If it’s deep enough so there’s not a lot of oxygen in the water and it’s cold enough that will help reduce the corrosion of the remains. Probably not a lot to be learnt from that as we know that it was flown into the water after it ran out of fuel, no mechanical failure being the cause.
There’s two very important boxes though, the Cockpit Voice Recorder and Flight Data Recorder. Two problems with the CVR though – They only record the last 30 minutes of cockpit sound so at best it’ll get airflow noises, the engines running dry, then impacting the sea. There’s might be a few words from the pilot, and they may or may not provide some insight as to why he decided to take 238 people with him. The other problem is that the pilot could have pulled the CVR circuit breaker early on after he did whatever to take over the cockpit. So I’m guessing that would be one pilot asking the other to go back to get, do, or check something and when he’s out shut & lock the door. That’s all you’d hear and again unlikely to be much useful gained from that.
The FDR will have recorded the entire flight, I’m not sure if there’s a circuit breaker for it in the cockpit but in any case I think they have an isolated battery back-up in case main power goes out. I’m not sure how long that battery would last, though you’d expect it to be able to record an entire long flight. But again all it’s going to tell us is what the plane was doing and when. We already know a lot of that. There’s also a Quick Access Recorder which records basic flight data independently of the FDR, same problems with interpreting the data though.
None of that, nor anything that could be found in the wreckage, will answer the question as to why it happened.
Chaos Game Played on the Circle of Fifths.
SN: did you read my comments about the Norton Nemesis the other day?
Michael V said:
SN: did you read my comments about the Norton Nemesis the other day?
No I missed that sorry.
Spiny Norman said:
Michael V said:
SN: did you read my comments about the Norton Nemesis the other day?
No I missed that sorry.
A 1998/99 prototype was made. 1500 cc V8. It resides in the British National Motorcycle Museum, near Birmingham. I don’t know how I missed it when we were there a few years back. It’s currently being restored to working condition by Allen Millyard, a motorcycle engineer known for adding cylinders or banks of cylinders to bikes.
Specs:
https://www.motorcyclespecs.co.za/model/norton/norton_nemessis.htm
Millyard’s video of the immensely weird front end restoration:
https://www.youtube.com/watch?v=BBwMn1ookQE
Michael V said:
Spiny Norman said:
Michael V said:
SN: did you read my comments about the Norton Nemesis the other day?
No I missed that sorry.
A 1998/99 prototype was made. 1500 cc V8. It resides in the British National Motorcycle Museum, near Birmingham. I don’t know how I missed it when we were there a few years back. It’s currently being restored to working condition by Allen Millyard, a motorcycle engineer known for adding cylinders or banks of cylinders to bikes.
Specs:
https://www.motorcyclespecs.co.za/model/norton/norton_nemessis.htm
Millyard’s video of the immensely weird front end restoration:
https://www.youtube.com/watch?v=BBwMn1ookQE
Oh lovely!
Alan does phenomenal work.
Also, racing car safety has improved somewhat over the years. I don’t believe I’d like to drive a car with a fuel tank here.
Spiny Norman said:
Michael V said:
Spiny Norman said:No I missed that sorry.
A 1998/99 prototype was made. 1500 cc V8. It resides in the British National Motorcycle Museum, near Birmingham. I don’t know how I missed it when we were there a few years back. It’s currently being restored to working condition by Allen Millyard, a motorcycle engineer known for adding cylinders or banks of cylinders to bikes.
Specs:
https://www.motorcyclespecs.co.za/model/norton/norton_nemessis.htm
Millyard’s video of the immensely weird front end restoration:
https://www.youtube.com/watch?v=BBwMn1ookQE
Oh lovely!
Alan does phenomenal work.Also, racing car safety has improved somewhat over the years. I don’t believe I’d like to drive a car with a fuel tank here.
Heck!
One for the m/c fans:
captain_spalding said:
One for the m/c fans:
Competition AJS trials bike.
Michael V said:
captain_spalding said:
One for the m/c fans:
Competition AJS trials bike.
my old man used to do scrambles back in the 20’s.
ChrispenEvan said:
Michael V said:
captain_spalding said:
One for the m/c fans:
Competition AJS trials bike.
my old man used to do scrambles back in the 20’s.
He must have been old when you were born.
Michael V said:
ChrispenEvan said:
Michael V said:Competition AJS trials bike.
my old man used to do scrambles back in the 20’s.
He must have been old when you were born.
born in 07 and me in 55.
Yet another attempt at the propellantless reaction drive.
Pretty much zero chance it actually works of course but I’d like to see some independent testing done.
https://youtu.be/WhsKMWOYuYo?si=KiqscASoXyQ6S8bU
Bizarre traveling flame discovery.
Excitable Mediums (Media?) are really interesting and you can make one with lighter fluid and a little trough!
Steve Mould.
The Incredible Technology Behind Sandpaper.
Sandpaper belongs to a class of abrasive products known as coated abrasives. These products are composed of an abrasive element bonded to a backing material such as paper, fabrics, rubber, metals or resins and they generally possess some degree of flexibility. King Solomon is mentioned to have used a mysterious worm or an abrasive substance called the Shamir that had the power to cut through or disintegrate stone, iron and diamond. In the 13th century, Chinese craftsmen were known to bond sand, crushed shells and sharp seeds onto parchment with natural gum. Other notable natural substances that have been used as abrasive tools include Shark skin, Coelacanth scales, and boiled and dried rough horsetail plan.
The World Of Strange Computers.
Explore the fascinating world of unconventional computers that defied the norms of their time, revolutionizing diverse fields from engineering to economics, torpedo guidance, digital logic, and animation. From Lukyanov’s ingenious Water Integrator solving complex equations using water flow to Moniac’s hydraulic macroeconomics modeling, delve into the Torpedo Data Computer’s role in WWII, the conceptual marvel of Domino Computers, and the pioneering analog magic of Scanimate in producing early motion graphics. Witness how these unconventional machines shaped industries, solving complex problems in ways that predated the modern era of computing.
What Colour Is Darkness?
What’s the darkest color you’ve ever seen? To most people, the obvious answer would be the black, more specifically the black of total darkness. After all, black by definition is the absence of light.
But total darkness isn’t as dark as you might think. Paradoxically, we need light to see the darkness.
https://www.youtube.com/watch?v=s5sCkng9tLo
(uh-oh!)
Our first female Aussie astronaut! Very cool.
Spiny Norman said:
Our first female Aussie astronaut! Very cool.
Yeah kudos to her!
Spiny Norman said:
Our first female Aussie astronaut! Very cool.
I hope she actually gets to go into space at some stage.
monkey skipper said:
Spiny Norman said:
Our first female Aussie astronaut! Very cool.Yeah kudos to her!
Good
now to draw this lifeform with a broom
Spiny Norman said:
Our first female Aussie astronaut! Very cool.
I’ve been slowly going through mum’s stuff. Today, I found a photograph of Australia’s first Astronaut, Phil Chapman, signed and dedicated to my maternal grandparents. My grandparents and his parents were very good friends, so much so that his parents were my mother’s godparents.
Why Airport Security Suddenly Got Better.
From the Real Engineering Youtube channel. Quite impressive engineering.
Spiny Norman said:
Why Airport Security Suddenly Got Better.
From the Real Engineering Youtube channel. Quite impressive engineering.
That’s cool.
Wonder whether Spiny would be interested in this. Secret Invention That Changed World War 2
Proximity fuse.
roughbarked said:
Wonder whether Spiny would be interested in this. Secret Invention That Changed World War 2Proximity fuse.
I remember having to learn about prox fuses.
A natty invention, especially for the era of its creation.
How Chernobyl Exploded – PART THREE: The Final Minutes.
It is now 1AM, April 26th, 1986. Unbeknownst to the operators, they are now rocketing down the path to destruction. These next few minutes are critical for the survival or demise of the reactor, and they are equally misunderstood by the general public. So, let’s explore them.
Maurice Ralph Hilleman (August 30, 1919 – April 11, 2005) was a leading American microbiologist who specialized in vaccinology and developed over 40 vaccines, an unparalleled record of productivity. According to one estimate, his vaccines save nearly eight million lives each year.
He has been described as one of the most influential vaccinologists ever. He has been called the “father of modern vaccines”. Robert Gallo called Hilleman “the most successful vaccinologist in history”. He has been noted by some researchers as having saved more lives than any other scientist in the 20th century.
Of the 14 vaccines routinely recommended in American vaccine schedules, Hilleman and his team developed eight: those for measles, mumps, hepatitis A, hepatitis B, chickenpox, Neisseria meningitidis, Streptococcus pneumoniae and Haemophilus influenzae bacteria.] During the “1957-1958 Asian flu pandemic”, his vaccine is believed to have saved hundreds of thousands of lives. He also played a key role in developing the vaccine for the “1968-1969 Hong Kong flu pandemic”. He also played a role in the discovery of antigenic shift and drift, the cold-producing adenoviruses, the hepatitis viruses, and the potentially cancer-causing virus SV40
QI
OCDC said:
QI
It’s.
Carl Sagan unveils the Pale Blue Dot image.
Spiny Norman said:
Carl Sagan unveils the Pale Blue Dot image.
Thanks.
For once a youtoob watching all the way through, all 94 seconds of it :)
The Rev Dodgson said:
Spiny Norman said:
Carl Sagan unveils the Pale Blue Dot image.Thanks.
For once a youtoob watching all the way through, all 94 seconds of it :)
I find that Carl Sagan is always worth watching.
Spiny Norman said:
The Rev Dodgson said:
Spiny Norman said:
Carl Sagan unveils the Pale Blue Dot image.Thanks.
For once a youtoob watching all the way through, all 94 seconds of it :)
I find that Carl Sagan is always worth watching.
He had a certaiin appeal.
How to turn an iceberg into an aircraft carrier – Project Habakkuk.
Dec. 21, 1968: Photograph taken from the Apollo 8 spacecraft looking back at the Saturn V third (S-IVB) stage from which the spacecraft had just separated following trans-lunar injection. The spacecraft became the first with men on board to leave Earth’s orbit, to reach the Moon, to orbit around it.
Spiny Norman said:
Dec. 21, 1968: Photograph taken from the Apollo 8 spacecraft looking back at the Saturn V third (S-IVB) stage from which the spacecraft had just separated following trans-lunar injection. The spacecraft became the first with men on board to leave Earth’s orbit, to reach the Moon, to orbit around it.
It looks like a hose connector.
buffy said:
Spiny Norman said:
Dec. 21, 1968: Photograph taken from the Apollo 8 spacecraft looking back at the Saturn V third (S-IVB) stage from which the spacecraft had just separated following trans-lunar injection. The spacecraft became the first with men on board to leave Earth’s orbit, to reach the Moon, to orbit around it.
It looks like a hose connector.
It does but I’d remove the white parts that would slow down water flow,
Well that’s the end of the pristine Antarctic.
$50 Trillion Was Just Found Under Antarctica.
What do we do when 511 billion barrels of oil has been found in the world’s largest nature reserve?
The Race to Fix Australia’s Failed Dam.
Peak Warming Man said:
it was going to be demolished anyway just not explosively.
Wow. This is apparently what was supposed to be a STATIC FIRE TEST today of a Tianlong-3 first stage by China’s Space Pioneer. That’s catastrophic, not static.
https://x.com/i/status/1807339807640518690
Oops.
Spiny Norman said:
Wow. This is apparently what was supposed to be a STATIC FIRE TEST today of a Tianlong-3 first stage by China’s Space Pioneer. That’s catastrophic, not static.https://x.com/i/status/1807339807640518690
Oops.
Not visible to non-twits.
Spiny Norman said:
Wow. This is apparently what was supposed to be a STATIC FIRE TEST today of a Tianlong-3 first stage by China’s Space Pioneer. That’s catastrophic, not static.https://x.com/i/status/1807339807640518690
Oops.
I saw that last night and thought it might be related to that booster that fell from the sky a couple of days ago, but apparently not.
roughbarked said:
Spiny Norman said:
Wow. This is apparently what was supposed to be a STATIC FIRE TEST today of a Tianlong-3 first stage by China’s Space Pioneer. That’s catastrophic, not static.https://x.com/i/status/1807339807640518690
Oops.
Not visible to non-twits.
https://tokyo3.org/forums/holiday/posts/2170285/
or here:
https://video.twimg.com/ext_tw_video/1807339715013509120/pu/vid/avc1/540×952/3oCuR203Hna2OfmO.mp4?tag=12
roughbarked said:
Spiny Norman said:Worked for me. I am not a xit.Wow. This is apparently what was supposed to be a STATIC FIRE TEST today of a Tianlong-3 first stage by China’s Space Pioneer. That’s catastrophic, not static.Not visible to non-twits.https://x.com/i/status/1807339807640518690
Oops.
Dark Orange said:
roughbarked said:
Spiny Norman said:
Wow. This is apparently what was supposed to be a STATIC FIRE TEST today of a Tianlong-3 first stage by China’s Space Pioneer. That’s catastrophic, not static.https://x.com/i/status/1807339807640518690
Oops.
Not visible to non-twits.
https://tokyo3.org/forums/holiday/posts/2170285/
or here:
https://video.twimg.com/ext_tw_video/1807339715013509120/pu/vid/avc1/540×952/3oCuR203Hna2OfmO.mp4?tag=12
Thanks.
OCDC said:
roughbarked said:Spiny Norman said:Worked for me. I am not a xit.Wow. This is apparently what was supposed to be a STATIC FIRE TEST today of a Tianlong-3 first stage by China’s Space Pioneer. That’s catastrophic, not static.Not visible to non-twits.https://x.com/i/status/1807339807640518690
Oops.
Ah it should be Xit these days. Sorry about that.
so when CHINA fails they actually go
Dark Orange said:
roughbarked said:
Spiny Norman said:
Wow. This is apparently what was supposed to be a STATIC FIRE TEST today of a Tianlong-3 first stage by China’s Space Pioneer. That’s catastrophic, not static.https://x.com/i/status/1807339807640518690
Oops.
Not visible to non-twits.
https://tokyo3.org/forums/holiday/posts/2170285/
or here:
https://video.twimg.com/ext_tw_video/1807339715013509120/pu/vid/avc1/540×952/3oCuR203Hna2OfmO.mp4?tag=12
BTW, the video contained in the link to this forum has extra footage worth watching.
Dark Orange said:
Dark Orange said:
roughbarked said:Not visible to non-twits.
https://tokyo3.org/forums/holiday/posts/2170285/
or here:
https://video.twimg.com/ext_tw_video/1807339715013509120/pu/vid/avc1/540×952/3oCuR203Hna2OfmO.mp4?tag=12
BTW, the video contained in the link to this forum has extra footage worth watching.
That’s the one I watched. Thanks.
Dark Orange said:
Dark Orange said:
roughbarked said:Not visible to non-twits.
https://tokyo3.org/forums/holiday/posts/2170285/
or here:
https://video.twimg.com/ext_tw_video/1807339715013509120/pu/vid/avc1/540×952/3oCuR203Hna2OfmO.mp4?tag=12
BTW, the video contained in the link to this forum has extra footage worth watching.
That could’ve turned very bad, very quickly.
Michael V said:
Dark Orange said:
Dark Orange said:https://tokyo3.org/forums/holiday/posts/2170285/
or here:
https://video.twimg.com/ext_tw_video/1807339715013509120/pu/vid/avc1/540×952/3oCuR203Hna2OfmO.mp4?tag=12
BTW, the video contained in the link to this forum has extra footage worth watching.
That could’ve turned very bad, very quickly.
Note that this happened a week ago:
Ah well good to know that CHINA are targeting their own real estate with their rockets slash missiles unlike ILUARUPS ¡
Dark Orange said:
Michael V said:
Dark Orange said:BTW, the video contained in the link to this forum has extra footage worth watching.
That could’ve turned very bad, very quickly.
Note that this happened a week ago:
Oh heck yes.
That rocket used very toxic hypergolic fuels as well. I think the one that I posted used more regular liquid fuels and it probably wouldn’t have had a large amount onboard either, being a static test.
Spiny Norman said:
Dark Orange said:
Michael V said:That could’ve turned very bad, very quickly.
Note that this happened a week ago:
Oh heck yes.
That rocket used very toxic hypergolic fuels as well. I think the one that I posted used more regular liquid fuels and it probably wouldn’t have had a large amount onboard either, being a static test.
The second camera angle still shows a very large kaboom when it hit the dirt. As for the one a week ago, would I be correct in assuming the yellow/orange smoke is Nitrogen Dioxide?
In the womb, Stephanie was meant to develop male. But an issue with her adrenal glands reversed the process.
Congenital adrenal hyperplasia, or CAH, is a group of conditions that affects the adrenal glands. These glands, which sit above the kidneys, make hormones such as cortisol, aldosterone and androgens (male sex hormones). The effects of CAH vary significantly from person to person, depending on the type of CAH.
Intersex is an umbrella term for over 30 different conditions with varying degrees of impact. For some, intersex features are noticeable from birth, while others don’t realise until they try for children. For more information, read: https://www.healthdirect.gov.au/intersex-variation
SCIENCE said:
Ah well good to know that CHINA are targeting their own real estate with their rockets slash missiles unlike ILUARUPS ¡
Wonder what the Pandas had to say about it all.
Dark Orange said:
Spiny Norman said:
Dark Orange said:Note that this happened a week ago:
Oh heck yes.
That rocket used very toxic hypergolic fuels as well. I think the one that I posted used more regular liquid fuels and it probably wouldn’t have had a large amount onboard either, being a static test.
The second camera angle still shows a very large kaboom when it hit the dirt. As for the one a week ago, would I be correct in assuming the yellow/orange smoke is Nitrogen Dioxide?
Yeah I guess it still must have had a fair bit of fuel/oxidiser onboard.
I think the hypergolic one used nitrogen tetroxide, very nasty stuff.
roughbarked said:
SCIENCE said:Ah well good to know that CHINA are targeting their own real estate with their rockets slash missiles unlike ILUARUPS ¡
Wonder what the Pandas had to say about it all.
probably bamboozled by it all.
JudgeMental said:
roughbarked said:
SCIENCE said:Ah well good to know that CHINA are targeting their own real estate with their rockets slash missiles unlike ILUARUPS ¡
Wonder what the Pandas had to say about it all.
probably bamboozled by it all.
Totally.
Morning, threatening rain in ol’ Brisbane town.
England scrapes home against some busted arsed Slovak state.
Peak Warming Man said:
Morning, threatening rain in ol’ Brisbane town.
England scrapes home against some busted arsed Slovak state.
you’ve done it again.
JudgeMental said:
Peak Warming Man said:
Morning, threatening rain in ol’ Brisbane town.
England scrapes home against some busted arsed Slovak state.
you’ve done it again.
Yeah.
Dark Orange said:
Michael V said:
Dark Orange said:BTW, the video contained in the link to this forum has extra footage worth watching.
That could’ve turned very bad, very quickly.
Note that this happened a week ago:
Hmmmmm.
How to Calculate Pi by Throwing Frozen Hot Dogs.
Suspected Female Serial Killer Caught But Not Punished | Tales From the Bottle.
Qxir.
29,000 Feet Up Mount Everest with DJI Mavic 3 Pro.
The 777 engines are amongst the most efficient to be found anywhere.
Was Penrose Right? NEW EVIDENCE For Quantum Effects In The Brain.
Nobel laureate Roger Penrose is widely held to be one of the most brilliant living physicists for his wide-ranging work from black holes to cosmology. And then there’s his idea about how consciousness is caused by quantum processes. Most scientists have dismissed this as a cute eccentricity—a guy like Roger gets to have at least one crazy theory without being demoted from the supersmartypants club. The most common argument for this dismissal is that quantum effects can’t survive long enough in an environment as warm and chaotic as the brain. Well, a new study has revealed that Penrose’s prime candidate molecule for this quantum activity does indeed exhibit large scale quantum activity. So was Penrose right after all? Are you a quantum entity?
Spiny Norman said:
Was Penrose Right? NEW EVIDENCE For Quantum Effects In The Brain.Nobel laureate Roger Penrose is widely held to be one of the most brilliant living physicists for his wide-ranging work from black holes to cosmology. And then there’s his idea about how consciousness is caused by quantum processes. Most scientists have dismissed this as a cute eccentricity—a guy like Roger gets to have at least one crazy theory without being demoted from the supersmartypants club. The most common argument for this dismissal is that quantum effects can’t survive long enough in an environment as warm and chaotic as the brain. Well, a new study has revealed that Penrose’s prime candidate molecule for this quantum activity does indeed exhibit large scale quantum activity. So was Penrose right after all? Are you a quantum entity?
Quantum effects having a significant effect on brain activity seems a perfectly reasonable hypothesis to me.
The Rev Dodgson said:
Spiny Norman said:
Was Penrose Right? NEW EVIDENCE For Quantum Effects In The Brain.
Nobel laureate Roger Penrose is widely held to be one of the most brilliant living physicists for his wide-ranging work from black holes to cosmology. And then there’s his idea about how consciousness is caused by quantum processes. Most scientists have dismissed this as a cute eccentricity—a guy like Roger gets to have at least one crazy theory without being demoted from the supersmartypants club. The most common argument for this dismissal is that quantum effects can’t survive long enough in an environment as warm and chaotic as the brain. Well, a new study has revealed that Penrose’s prime candidate molecule for this quantum activity does indeed exhibit large scale quantum activity. So was Penrose right after all? Are you a quantum entity?
Quantum effects having a significant effect on brain activity seems a perfectly reasonable hypothesis to me.
We mean quantum effects have a significant effect on other computational device activity oh wait ah yes.
Evidence of dark oxygen production at the abyssal seafloor.
Spiny Norman said:
Evidence of dark oxygen production at the abyssal seafloor.
and another one from the BBC:
The Rev Dodgson said:
Spiny Norman said:
Evidence of dark oxygen production at the abyssal seafloor.
and another one from the BBC:
Is this how Dark Brandon Ended Up In Bathos ¿
How a CIA Base Works.
How do CIA bases operate on foreign soil? Where are they concealed? What occurs inside them?
Tau.Neutrino said:
340. The most splendid little boat you ever will see!
It’s beautiful! Obviously Johnny is, indeed, a perfectionist, and this build must have proceeded quite slowly, with every step being given a great deal of thought.
You only have to look at the hull, even in its ‘derelict’ state, to appreciate its lines, and its potential. I think that the state of dereliction was somewhat overstated, as i saw nothing there which would be a serious discouragement to taking on the project. I’ve seen hulls in far worse condition resurrected to presentable and useful condition.
It looks like a steam launch, which i think is gilding the lily a bit, but, it’s his boat and he’s happy with that.
Years ago, i saw on Brisbane Water near Gosford a small steam launch which two blokes had built for themselves. It was not as beautiful as Johnny’s boat, and they had to stop here and there to replenish the feed water forthe steam engine, of course, but it was a genuine steam launch, and a thing of fascination.
The Physics of Dyson Spheres.
The idea of Dyson Spheres was a radical proposal by the physicist Freeman Dyson, an enormous shell of material enveloping a star. Dyson’s idea may be over half a century old, but interest in looking for such objects has only grown in the decades since. But how would such structures work? Are they physically even possible? And what might someone use them for? Today, we dive into the physics of Dyson spheres.
https://www.youtube.com/watch?v=zU_R2ghfsBE
How AI could help us talk to animals.
Why researchers think we’re close to getting interspecies chatbots.
https://www.youtube.com/watch?v=7PgSanU_VpQ
This Is A Light-Nanosecond!
Spiny Norman said:
The Physics of Dyson Spheres.The idea of Dyson Spheres was a radical proposal by the physicist Freeman Dyson, an enormous shell of material enveloping a star. Dyson’s idea may be over half a century old, but interest in looking for such objects has only grown in the decades since. But how would such structures work? Are they physically even possible? And what might someone use them for? Today, we dive into the physics of Dyson spheres.
https://www.youtube.com/watch?v=zU_R2ghfsBE
How AI could help us talk to animals.
Why researchers think we’re close to getting interspecies chatbots.
https://www.youtube.com/watch?v=7PgSanU_VpQ
This Is A Light-Nanosecond!
“But how would such structures work? Are they physically even possible? And what might someone use them for? “
The answers are:
They wouldn’t
No
Nothing
aren’t they?
Disclosure: I didn’t actually watch the video, or even scan the transcript.
The Rev Dodgson said:
Spiny Norman said:
The Physics of Dyson Spheres.The idea of Dyson Spheres was a radical proposal by the physicist Freeman Dyson, an enormous shell of material enveloping a star. Dyson’s idea may be over half a century old, but interest in looking for such objects has only grown in the decades since. But how would such structures work? Are they physically even possible? And what might someone use them for? Today, we dive into the physics of Dyson spheres.
https://www.youtube.com/watch?v=zU_R2ghfsBE
How AI could help us talk to animals.
Why researchers think we’re close to getting interspecies chatbots.
https://www.youtube.com/watch?v=7PgSanU_VpQ
This Is A Light-Nanosecond!
“But how would such structures work? Are they physically even possible? And what might someone use them for? “
The answers are:
They wouldn’t
No
Nothingaren’t they?
Disclosure: I didn’t actually watch the video, or even scan the transcript.
Although Dyson sphere systems are theoretically possible, building a stable megastructure around the Sun is currently far beyond humanity’s engineering capacity.
Wikipedia
The Rev Dodgson said:
Spiny Norman said:
The Physics of Dyson Spheres.The idea of Dyson Spheres was a radical proposal by the physicist Freeman Dyson, an enormous shell of material enveloping a star. Dyson’s idea may be over half a century old, but interest in looking for such objects has only grown in the decades since. But how would such structures work? Are they physically even possible? And what might someone use them for? Today, we dive into the physics of Dyson spheres.
https://www.youtube.com/watch?v=zU_R2ghfsBE
How AI could help us talk to animals.
Why researchers think we’re close to getting interspecies chatbots.
https://www.youtube.com/watch?v=7PgSanU_VpQ
This Is A Light-Nanosecond!
“But how would such structures work? Are they physically even possible? And what might someone use them for? “
The answers are:
They wouldn’t
No
Nothingaren’t they?
Disclosure: I didn’t actually watch the video, or even scan the transcript.
How about a Niven Ring then? They are difficult, but not impossible. (They are for now though)
Spiny Norman said:
The Rev Dodgson said:
Spiny Norman said:
The Physics of Dyson Spheres.The idea of Dyson Spheres was a radical proposal by the physicist Freeman Dyson, an enormous shell of material enveloping a star. Dyson’s idea may be over half a century old, but interest in looking for such objects has only grown in the decades since. But how would such structures work? Are they physically even possible? And what might someone use them for? Today, we dive into the physics of Dyson spheres.
https://www.youtube.com/watch?v=zU_R2ghfsBE
How AI could help us talk to animals.
Why researchers think we’re close to getting interspecies chatbots.
https://www.youtube.com/watch?v=7PgSanU_VpQ
This Is A Light-Nanosecond!
“But how would such structures work? Are they physically even possible? And what might someone use them for? “
The answers are:
They wouldn’t
No
Nothingaren’t they?
Disclosure: I didn’t actually watch the video, or even scan the transcript.
How about a Niven Ring then? They are difficult, but not impossible. (They are for now though)
I think rings are more possible that spheres.
JudgeMental said:
Spiny Norman said:
The Rev Dodgson said:“But how would such structures work? Are they physically even possible? And what might someone use them for? “
The answers are:
They wouldn’t
No
Nothingaren’t they?
Disclosure: I didn’t actually watch the video, or even scan the transcript.
How about a Niven Ring then? They are difficult, but not impossible. (They are for now though)
I think rings are more possible that spheres.
Ian said:
The Rev Dodgson said:
Spiny Norman said:
The Physics of Dyson Spheres.The idea of Dyson Spheres was a radical proposal by the physicist Freeman Dyson, an enormous shell of material enveloping a star. Dyson’s idea may be over half a century old, but interest in looking for such objects has only grown in the decades since. But how would such structures work? Are they physically even possible? And what might someone use them for? Today, we dive into the physics of Dyson spheres.
https://www.youtube.com/watch?v=zU_R2ghfsBE
How AI could help us talk to animals.
Why researchers think we’re close to getting interspecies chatbots.
https://www.youtube.com/watch?v=7PgSanU_VpQ
This Is A Light-Nanosecond!
“But how would such structures work? Are they physically even possible? And what might someone use them for? “
The answers are:
They wouldn’t
No
Nothingaren’t they?
Disclosure: I didn’t actually watch the video, or even scan the transcript.
Although Dyson sphere systems are theoretically possible, building a stable megastructure around the Sun is currently far beyond humanity’s engineering capacity.
Wikipedia
Depends what you mean by “theoretically possible”.
I mean if you develop a material with near infinite compressive strength and flexural stiffness, then sure, you could make it work.
But if you limit possible materials to materials that are theoretically possible according to current theories, then no way.
The Rev Dodgson said:
Ian said:
The Rev Dodgson said:“But how would such structures work? Are they physically even possible? And what might someone use them for? “
The answers are:
They wouldn’t
No
Nothingaren’t they?
Disclosure: I didn’t actually watch the video, or even scan the transcript.
Although Dyson sphere systems are theoretically possible, building a stable megastructure around the Sun is currently far beyond humanity’s engineering capacity.
Wikipedia
Depends what you mean by “theoretically possible”.
I mean if you develop a material with near infinite compressive strength and flexural stiffness, then sure, you could make it work.
But if you limit possible materials to materials that are theoretically possible according to current theories, then no way.
so it is just an engineering problem?
;-)
JudgeMental said:
Spiny Norman said:
The Rev Dodgson said:“But how would such structures work? Are they physically even possible? And what might someone use them for? “
The answers are:
They wouldn’t
No
Nothingaren’t they?
Disclosure: I didn’t actually watch the video, or even scan the transcript.
How about a Niven Ring then? They are difficult, but not impossible. (They are for now though)
I think rings are more possible that spheres.
Sure, I have no problem with rings at all, at all.
The Rev Dodgson said:
Ian said:
The Rev Dodgson said:“But how would such structures work? Are they physically even possible? And what might someone use them for? “
The answers are:
They wouldn’t
No
Nothingaren’t they?
Disclosure: I didn’t actually watch the video, or even scan the transcript.
Although Dyson sphere systems are theoretically possible, building a stable megastructure around the Sun is currently far beyond humanity’s engineering capacity.
Wikipedia
Depends what you mean by “theoretically possible”.
I mean if you develop a material with near infinite compressive strength and flexural stiffness, then sure, you could make it work.
But if you limit possible materials to materials that are theoretically possible according to current theories, then no way.
Yes BC
JudgeMental said:
The Rev Dodgson said:
Ian said:Although Dyson sphere systems are theoretically possible, building a stable megastructure around the Sun is currently far beyond humanity’s engineering capacity.
Wikipedia
Depends what you mean by “theoretically possible”.
I mean if you develop a material with near infinite compressive strength and flexural stiffness, then sure, you could make it work.
But if you limit possible materials to materials that are theoretically possible according to current theories, then no way.
so it is just an engineering problem?
;-)
Exactly :)
Ian said:
The Rev Dodgson said:
Ian said:Although Dyson sphere systems are theoretically possible, building a stable megastructure around the Sun is currently far beyond humanity’s engineering capacity.
Wikipedia
Depends what you mean by “theoretically possible”.
I mean if you develop a material with near infinite compressive strength and flexural stiffness, then sure, you could make it work.
But if you limit possible materials to materials that are theoretically possible according to current theories, then no way.
Yes BC
LOL, that name crossed my mind too.
JudgeMental said:
Ian said:
The Rev Dodgson said:Depends what you mean by “theoretically possible”.
I mean if you develop a material with near infinite compressive strength and flexural stiffness, then sure, you could make it work.
But if you limit possible materials to materials that are theoretically possible according to current theories, then no way.
Yes BC
LOL, that name crossed my mind too.
I know we all mocked BC for using that term, but in an engineering context I don’t have a problem with it.
Trying to Convince ChatGPT It’s Conscious.
ChatGPT is an impressive mimicry of a fully-conscious conversational partner. Perhaps too impressive?
What is Quantum Navigation, and what does it have to do with the aviation industry?
Well, it turns out that this technology could be what we need, to solve a very serious problem: GPS jamming and spoofing. Because when it becomes available, quantum navigation could actually replace GPS – COMPLETELY.
https://www.youtube.com/watch?v=_UNeYZEEOyo
The quantum gyro section starts at about the sixteen minute mark.
ISS Timelapse – Crossing Australia (15 Jul 2024)
https://www.youtube.com/watch?v=ojbBLENz15s
An Ancient Roman Shipwreck May Explain the Universe.
https://www.youtube.com/watch?v=o0A9M5wHBA4
How One Insane Long Jump Outsmarted the Entire Sport.
Tuariki Delamere’s somersault long jump at the 1974 LA Pacific Championships marked a pivotal moment in track and field history. This video examines the New Zealand athlete’s innovative technique, its biomechanical advantages, and the subsequent IAAF ban.
Thankfully these horrific weapons are no longer in the inventory.
The Tsar Bomba: The Untold Story.
https://www.youtube.com/watch?v=8l63cWiHu5E
Spiny Norman said:
Thankfully these horrific weapons are no longer in the inventory.The Tsar Bomba: The Untold Story.
https://www.youtube.com/watch?v=8l63cWiHu5E
JudgeMental said:
I am familiar with this from my copy of this estmable tome:
I assume that you’ve also seen the exploding whistle, and the explosive water bottle?
However, it’s uncertain if things like the chocolate bar, the whistle, etc, were ever actually deployed.
What is certain is that desirable ‘souvenirs’ were, and are, very frequently booby-trapped. Expert souvenir hunters find that a reel of fishing line and a few different sized hooks can prevent some considerable embarrassment.
It’s Happening – China Launches World’s First Thorium Nuclear Reactor
Dr Ben Miles
https://www.youtube.com/watch?v=t4EJQPWjFj8
I’m extremely pleased to see these going ahead.
Spiny Norman said:
It’s Happening – China Launches World’s First Thorium Nuclear Reactor
Dr Ben Mileshttps://www.youtube.com/watch?v=t4EJQPWjFj8
I’m extremely pleased to see these going ahead.
Looking good, so far.
roughbarked said:
Spiny Norman said:
It’s Happening – China Launches World’s First Thorium Nuclear Reactor
Dr Ben Mileshttps://www.youtube.com/watch?v=t4EJQPWjFj8
I’m extremely pleased to see these going ahead.
Looking good, so far.
so not only are they overcapacity dominating the transport industry they’re going to overwhelm everyone else with their production of energy the effective currency of the millennium
Democracy might be mathematically impossible – here’s why.
Starting in the 1940s, a new surgery was being explored to help people with severe epilepsy which involved severing communication between the two hemispheres of the brain. It worked, but caused some very strange side effects. As researchers began to study these side effects, it led to an entirely new understanding of the brain; including the surprising fact that we really don’t have control over our decisions.
Spiny Norman said:
Democracy might be mathematically impossible – here’s why.
Goes on a bit :)
democracy might be mathematically impossible this isn’t a value judgment a comment about
0:07
human nature nor a statement about how rare and unstable Democratic societies have been in the
0:12
history of civilization our current attempt at democracy the methods we’re using to elect
0:18
our leaders are fundamentally irrational and this is a well-established mathematical fact
0:27
this is a video about the math that proved that fact and led to a Nobel Prize it’s a
0:32
video about how groups of people make decisions and the pitfalls that our voting systems fall
0:37
into one of the simplest ways to hold an election is to ask the voters to mark one candidate as
0:46
their favorite on a ballot and when the votes are counted the candidate with the most votes
0:51
wins the election this is known as first past the post voting the name is kind of a misnomer though
0:58
there is no post that any of the candidates need to get past. the winner is just the candidate with
1:03
the most votes this method likely goes back to Antiquity it has been used to elect members of
1:10
the House of Commons in England since the 14th century and it’s still a common voting system
1:15
with 44 countries in the world using it to elect its leaders 30 of these countries were former
1:21
British colonies the us being a former British colony still uses first past the post in most
1:28
of its states to elect their representatives to the electoral college but first pass the post has
1:34
problems if you are selecting representatives in a parliament you can and frequently do get
1:40
situations where the majority of the country did not vote for the party that ends up holding the
1:45
power in the last 100 years there were 21 times a single party held a majority of the seats in the
1:53
British Parliament but only two of those times did the majority of the voters actually vote for
1:59
that party so a party which only a minority of the people voted for ends up holding all of the
2:06
power in government another thing that happens because of first pass the post is that similar
2:11
parties end up stealing votes from each other the 2000 US presidential election which was an
2:18
election essentially between Al Gore and George W bush at that point every state in the nation used
2:25
first pass the post to determine the outcome of the election bush had more votes in Florida but
2:31
by a ridiculously slim margin it was fewer than 600 votes but there was another candidate on the
2:39
ballot Ralph Nader. Nader was a green candidate he was certainly to the left of either Gore or bush
2:48
what we need is the upsurge of Citizen concern people concerned poor Rich or middle class to
2:54
counteract the power of the special interest and he got almost 100,000 votes in Florida I
3:01
just don’t know if I can with a conscience um vote for uh Bush or Gore I will vote for Ralph
3:06
Nader most of those voters were devastated that by voting for Nader rather than Gore they ended
3:14
up electing Bush This is what is called a spoiler effect almost all Nader voters preferred Gore
3:22
to Bush but in a first pass post system they had no way of expressing that preference because you
3:30
could only vote for one candidate so first pass the post incentivizes voters to vote strategically
3:39
say there are five parties one of them will be the smallest one and so they won’t win why would
3:46
you vote for them this is also true if you have four parties or three parties this Winner Takes
3:53
all voting system leads to a concentration of power in larger parties eventually leading to
3:59
a two party system this effect is common enough that it has a name do verger’s
4:05
law so first pass the post isn’t a great option so what else could we do well we can say that a
4:16
candidate can only win an election if they get a majority at least 50% plus one of the vote
4:22
but what if we hold an election and no one gets a majority we could go to the people who voted
4:27
for the candidate with the fewest votes and ask ask them to vote again but choose a different
4:32
candidate and we could repeat this process over and over eliminating the smallest candidate until
4:38
one candidate reaches a majority but holding many elections is a big hassle so instead we could just
4:46
ask voters to rank their preferences from their favorite to their least favorite and if their
4:51
favorite candidate gets eliminated we go to their second preferences when the polls close you count
4:57
the voters first choices if any c cidate has a majority of the votes then they’re the winner but
5:02
If no candidate has a majority the candidate with the fewest votes gets eliminated and their ballots
5:07
are distributed to those voters second preferences and this keeps happening until one candidate has
5:13
a majority of the votes this is mathematically identical to holding repeated elections it just
5:19
saves the time and hassle so it’s referred to as instant runoff but the system is also known
5:25
as preferential voting or ranked Choice voting an instant runoff doesn’t just affect the voters it
5:32
affects how the candidates behave towards each other it was the Minneapolis mayor’s race 2013
5:39
they were using rank Choice voting the incumbent mayor had stepped down and there were all of these
5:46
people came out from the woodwork wanting to be mayor there 35 candidates and so you would think
5:51
if there’s 35 candidates you’d want to dunk on someone you’d want to like kind of elbow yourself
5:57
into the spotlight that’s not what happened these 35 candidates all of them were really
6:02
nice to each other they were all super cordial super polite to the degree that at the end of the
6:10
final mayoral debate they all came together and they sang Kumbaya together k k oh Lord
6:30
the amount of vitriol and anger and partisan you know mudslinging that we’re all used to to
6:36
see this vision of an actual Kumbaya it’s not even a joke all of these people getting along
6:43
so desperate for second and third choices from other people that they’re like I’m going to be
6:47
the picture perfect kindest candidate possible but there’s also a problem with instant runoff
6:55
there can be cases where a candidate doing worse can actually help help get them elected let’s say
7:02
we have three candidates Einstein curee and bore now Einstein and bore have very conflicting views
7:10
while C is ideologically in the center so let’s say Einstein gets 25% of the vote cirri gets 30
7:17
and bore gets 45 no one got a majority so it goes to the second round with Einstein
7:23
being eliminated and because people who voted for Einstein put down c as their second choice well
7:29
C ultimately gets elected but now imagine that bour has a terrible campaign speech or proposes
7:37
a very unpopular policy so bad that some of his voters actually switch over to Einstein’s side
7:44
well now it’s curee that gets eliminated and because she’s more moderate half of
7:50
her voters select Einstein and the other half select bore in the second round and this leads
7:55
to boore winning so bore doing work in the first round actually leads to him winning the election
8:04
clearly this isn’t something that we want in a voting system this is what the french
8:09
mathematician Condor also thought Condor was one of the first people applying logic
8:15
and Mathematics to rigorously study voting systems making him one of the founders of a
8:20
branch of mathematics known as social Choice theory he was working during the time of the
8:26
French Revolution so fairly determining the will of the people was having a cultural moment right
8:31
then in 1784 condor’s contemporary at the French Royal Society of science Jean Charles de borda
8:41
proposed a voting method you ask the voters to rank the candidates if there are five candidates
8:48
ranking someone first gives that candidate Four Points ranking them second would give them three
8:53
and so on with zero points being awarded for last place but the board account has a problem because
9:01
the number of points given to each candidate is dependent on the total number of candidates
9:06
adding extra people that have no chance of winning can affect the winner because of this condr hated
9:13
Border’s idea he wrote that it was bound to lead to error because it relies on irrelevant factors
9:19
for its judgments so in 1785 Condor published an essay in which he proposed a new voting system
9:27
one he thought was the most Fair basically the winner needs to beat every other candidate in
9:33
a head-to-head election but with more than two candidates do you need to hold a large number of
9:39
head-to-head elections to pick the winner well no just ask the voters to rank their preferences just
9:44
like in instant runoff and then count how many voters rank each candidate higher than each other
9:50
candidate this feels like the most Fair voting method this voting system was actually
9:58
discovered 450 years earlier by Raymond lull a monk who was looking at how church leaders were
10:03
chosen but L’s ideas didn’t make an impact because his book ours electionus the art of Elections was
10:11
lost and only rediscovered in 2001 so the voting system is named after cond and not lol but will
10:20
there always be a winner in this way let’s try condor’s method for choosing dinner between you
10:25
and two friends there are three options burgers pizza or sushi you really like burgers so that’s
10:32
your first preference your second choice is pizza and you put Sushi last your friend prefers pizza
10:39
then Sushi then burgers and your other friend prefers Sushi than Burgers then pizza now if
10:45
you choose Burgers it can be argued that Sushi should have won instead since two of you prefer
10:50
Sushi over burgers and only one prefers Burgers to Sushi however by the same argument Pizza is
10:57
preferred to Sushi and burgers are preferred to Pizza by a margin of 2: one on each occasion so
11:04
it seems like you and your friends are stuck in a loop burgers are preferred to Pizza which is
11:09
preferred to Sushi which is preferred to Burgers and so on this situation is known as condor’s
11:17
Paradox Condor died before he could resolve this problem with his voting system he was
11:24
politically active during the French Revolution writing a draft of France’s Constitution in 1793
11:31
during the reign of terror when Le monang came to power he was deemed a traitor for criticizing the
11:37
regime specifically their new constitution the next year he was arrested and died in
11:43
jail over the next 150 years dozens of mathematicians were proposing their own
11:50
voting systems or modifications to Condor or bord ideas one of those mathematicians
11:57
was Charles Dodson better known as Lewis Carroll when he wasn’t writing Alice in Wonderland he was
12:03
trying to find a system to hold Fair elections but every voting system had similar kinds of problems
12:11
you’d either get Condor Loops or other candidates that had no chance of winning would affect the
12:17
outcome of the election in 1951 Kenneth Arrow published his PhD thesis and in it he outlined
12:26
five very obvious and reasonable conditions that AR voting system should have condition
12:31
number one if everyone in the group chooses one option over another the outcome should reflect
12:37
that if every individual in the group prefers to eat sushi over pizza then the group as a whole
12:42
should prefer Sushi over Pizza this is known as unanimity condition two no single person’s vote
12:50
should override the preferences of everyone else if everyone votes for pizza except one person who
12:55
votes for sushi the group should obviously choose Pizza if a single vote is decisive that’s not a
13:01
democracy that’s a dictatorship condition three everyone should be able to vote however they want
13:08
and the voting system must produce a conclusion for society based on all the ballots every time
13:14
it can’t avoid problematic ballots or candidates by simply ignoring them or just guessing randomly
13:20
it must reach the same answer for the same set of ballots every time this is called unrestricted
13:27
domain condition four the voting system should be transitive if a group prefers Burgers over
13:33
pizza and pizza over Sushi then they should also prefer Burgers over Sushi this is known
13:38
as transitivity condition five if the preference of the group is Sushi over Pizza the introduction
13:45
of another option like burgers should not change that preference sure the group might collectively
13:51
rank Burgers above both or in the middle or at the bottom but the ranking of sushi over Pizza
13:56
should not be affected by the new option this is called the independence of irrelevant Alternatives
14:04
but here’s the thing Arrow proved that satisfying all five of these conditions in a ranked voting
14:09
system with three or more candidates is impossible this is Arrow’s impossibility theorem and it was
14:15
so groundbreaking that Arrow was awarded the Nobel prize in economics in 1972 so I want to go through
14:21
a version of his proof based on a formulation by GN acus so let’s say there are three candidates
14:28
running for election Aristotle bore and C but we’ll refer to them as a b and c and we have a
14:37
collection of Voters that will line up in order so we have voter 1 2 3 and so on all the way up
14:43
to n each of these voters is free to rank a b and c however they like I’ll even allow ties now the
14:50
first thing we want to show is that if everyone ranks a particular candidate first or last then
14:56
society as a whole must also rank that candidate first or last let’s arbitrarily pick candidate B
15:03
if say half of the voters rank B first and half rank B last then the claim is our voting system
15:10
must put B either first or last and we’ll prove it by contradiction so say this is how everyone
15:18
voted if our system does not put B first or last but rather in the middle say a is ranked above
15:25
B which is above C then we’ll get a contradiction because if each of our voters moved C above a then
15:34
by unanimity C must be ranked above a however because we didn’t change the position of any a
15:41
relative to B A must still be ranked above B and because we didn’t change the position of
15:48
any c relative to B C must still be ranked below B and by transitivity if a is preferred to B and
15:55
B is preferred to C then a must be ranked above C but this contradicts the result by unanimity and
16:03
that proves that if everyone ranks a candidate first or last then Society must also rank them
16:09
first or last now let’s do a thought experiment where every voter puts B at the bottom of their
16:17
ranking we leave the ranking of A and C arbitrary well then by unanimity we know that b must be at
16:25
the bottom of society’s ranking we’ll call this setup profile 0 now we’ll create profile one which
16:32
is identical to profile Z except the first voter moves B from the bottom to the top this of course
16:39
doesn’t affect the outcome but we can keep doing this creating profiles 2 3 4 and so on with one
16:46
more voter of clipping B from the bottom to the top each time if we keep doing this there will
16:51
eventually come a voter whose change from having B at the bottom to B at the top will first flip
16:58
society’s ranking moving B to the top let’s call this voter the pivotal voter and we’ll label the
17:04
profile profile P profile o is then the profile right before the pivotal change happens let’s now
17:11
create a profile Q which is the same as P except the pivotal voter moves a above B by independence
17:20
of irrelevant Alternatives the social rank must also put a above B since for all of our voters
17:28
the relative position of A and B is the same as it was in profile O and B must be ranked above C
17:36
because the relative positions of B and C are the same as they were in profile P where our pivotal
17:43
voter moved B to the Top by transitivity a must be ranked above C in the social ranking this is true
17:52
regardless of how any of the non-pivotal voters rearrange their positions of A and C because
17:58
these rearrangements don’t change the position of a relative to B or C relative to B this means
18:07
the pivotal voter is actually a dictator for determining society’s preference of a over C the
18:13
social rank will always agree with a pivotal voter regardless of what the other voters do we can run
18:20
a similar thought experiment where we put C at the bottom and prove that there is again a dictator
18:26
who in this case determines the social preference of A over B and it turns out this voter is the
18:33
same one who determines the social preference for a over C the pivotal voter is therefore
18:40
a complete dictator so is democracy doomed well arrows impossibility theorem seems to say so if
18:49
there are three or more candidates to choose from there is no ranked Choice method to rationally
18:55
aggregate voter preferences you always need to give something up but the mathematician
19:04
Duncan black found a much more optimistic theorem which might actually represent reality better if
19:11
voters and candidates are naturally spread along a single Dimension say ranging from Liberal on
19:16
the left to conservative on the right but this could apply to any other political Dimension
19:21
well then black showed that the preference of the median voter will reflect the majority decision
19:28
the median voters choice will often determine the outcome of the election a result that aligns with
19:34
the majority of Voters avoiding the paradoxes and inconsistencies highlighted by arrow and
19:40
there’s more good news Arrow’s impossibility theorem only applies to ordinal voting systems
19:46
ones in which the voters rank candidates over others there is another way rated voting systems
19:53
the simplest version is known as approval voting where instead of ranking the candidates the voters
19:58
just tick the candidates they approve of there are also versions where you could indicate how
20:04
strongly you like each candidate say from minus 10 strongly disapprove of to plus 10 strongly approve
20:11
research has found that approval voting increases voter turnout decreases negative campaigning and
20:17
prevents the spoiler effect voters could express their approval for a candidate without worrying
20:22
about the size of the party they’re voting for it’s also simple to tally just count up what
20:28
percentage of the voters approve of each candidate and the one with the highest approval wins Kenneth
20:33
Arrow was initially skeptical of rated voting systems but toward the end of his life he agreed
20:39
that they were likely the best method approval voting is not new it was used by priests in the
20:45
Vatican to elect the pope between 1294 and 1621 it’s also used to elect the Secretary
20:51
General of the United Nations but it hasn’t been widely used in large scale elections and so more
20:58
real real world testing is likely required so is democracy mathematically impossible well yes if
21:05
we use rank Choice methods of voting which is what most countries in the world use to
21:10
elect their leaders and some methods are clearly better at aggregating the people’s preferences
21:14
than others the use of first past the post voting feels quite frankly ridiculous to me given all of
21:20
its flaws but just because things aren’t perfect doesn’t mean we shouldn’t try being interested in
21:26
the world around us caring about issues and being politically engaged is important it might be one
21:32
of the few ways we can make a real difference in the world like Winston Churchill said democracy
21:37
is the worst form of government except for all the other forms that have been tried democracy is not
21:44
perfect but it’s the best thing we’ve got the game might be crooked but it’s the only game in
21:50
town the world is changing how it works today is no guarantee of how it’ll work tomorrow from how
22:01
we elect presidents to how we do our jobs luckily there’s an easy way to be ready for whatever the
22:06
future holds by expanding your knowledge and critical thinking skills a little bit every
22:11
day and you can get started doing that right now for free with today’s sponsor brilliant brilliant
22:16
will make you a better thinker and Problem Solver while helping you build real skills in everything
22:21
from math and data analysis to programming and AI whatever it is that you’re curious about on
22:28
brilliant you’ll learn through Discovery by trying things out for yourself and you’ll not only gain
22:32
knowledge of key Concepts you’ll learn to apply them to real world situations learning a little
22:38
every day is one of the most important things you can do and Brilliant is the perfect way to
22:43
do it with thousands of bite-sized lessons that take just minutes now thinking about elections
22:50
for this video led me to revisit some of their courses on probability and statistics they’re
22:55
a great on-ramp to learning how we use data to make addictions plus they get you Hands-On with
23:00
real data and even let you run simulations for things like who will win the World Cup and the
23:05
best part about brilliant is you can learn from anywhere right on your phone so whenever you
23:11
have a few minutes you can be building a quicker sharper mind to try everything brilliant has to
23:16
offer for free for 30 days visit brilliant.org veritasium or scan this QR code or click that
23:23
link down in the description you will also get 20% off an annual premium subscription
23:28
so I want to thank brilliant for supporting the show and I want to thank you for watching
Rev is stepping on SCIENCE territory
dv said:
Rev is stepping on SCIENCE territory
thanks we do have an open borders policy where helpful practice is concerned and we’re much in appreciation we agree we should all help each other out
Some rather interesting machining done here.
Monocrystalline Diamond Machining
https://www.youtube.com/watch?v=ZPTFFPLOzCw
A lightweight documentary, but still quite good.
Between 1969 and 1972 twelve men walked on the surface of the moon. It was seen as the first chapter in an ambitious program of space exploration.
https://www.youtube.com/watch?v=4S77hsVN26U
Spiny Norman said:
A lightweight documentary, but still quite good.Between 1969 and 1972 twelve men walked on the surface of the moon. It was seen as the first chapter in an ambitious program of space exploration.
https://www.youtube.com/watch?v=4S77hsVN26U
Interesting Youtube channel there.
Has more than a couple of documentaries on the French Foreign Legion. I may watch some of them. Had a mate who’d been a Legionnaire, became a sergeant.
Weird Guns From History | Tales From the Bottle
Qxir
Spiny Norman said:
Weird Guns From History | Tales From the Bottle
Qxir
There are other problems people of the past have tried to solve with guns – like how can I let people know I disapprove of their religion?
LOL.
Could you survive a nanosecond on the Sun?
xkcd’s What If?
Spiny Norman said:
Could you survive a nanosecond on the Sun?
xkcd’s What If?
I know I wouldn’t go there just to find out.
Malicious attack on $5 million dollar telescope. Scientists don’t care.
Shot 7 times, yet the Harlan J Smith telescope at the McDonald Observatory still had 99% functionality. How?
Spiny Norman said:
Malicious attack on $5 million dollar telescope. Scientists don’t care.
Shot 7 times, yet the Harlan J Smith telescope at the McDonald Observatory still had 99% functionality. How?
Interesting.
Shit.
We are collectively too stupid to survive as a viable species.
Pre-industrial forests vs current forests.
https://x.com/i/status/1832954577164857563
A most interesting video on how the HMS Hood was sunk so quickly by the Bismarck in WW2. It seems that the ‘plunging fire that went through the deck’ theory is just an urban myth, it’s far more likely to be a fluke shot that hit further down the hull.
Sudden Destruction: Why Did HMS Hood Explode?
https://www.youtube.com/watch?v=jYqrBcX-f5k
The anniversary is today. :(
The Last Known Survivor Of The South Tower On 9/11 | World Trade Center Attacks | Ron DiFrancesco
Spiny Norman said:
The anniversary is today. :(The Last Known Survivor Of The South Tower On 9/11 | World Trade Center Attacks | Ron DiFrancesco
Damn, only one left and it was only 23 years ago.
I found this QI.
Titanic’s colossal engines were a work of mechanical art, towering three storeys tall – but they were just one part of a much larger system that propelled the massive ship through the ocean at 22 knots. Today we’ll explore the various parts of Titanic’s engineering systems; the boilers, the reciprocating engines and finally the powerful central turbine and how each system served to drive this massive ship at great speed!
With special thanks to the team from @TitanicHG for their spectacular 3D graphics, created by the talented Jack Gibson.
For those that may be interested, the SpaceX civilian crew is about to perform the first private spacewalk. As I type this they are yet to depressurise the capsule so it’s still tens of minutes away at least.
Spiny Norman said:
For those that may be interested, the SpaceX civilian crew is about to perform the first private spacewalk. As I type this they are yet to depressurise the capsule so it’s still tens of minutes away at least.
Has anyone yet wished them luck, and told them that we’re all counting on them?
captain_spalding said:
Spiny Norman said:
For those that may be interested, the SpaceX civilian crew is about to perform the first private spacewalk. As I type this they are yet to depressurise the capsule so it’s still tens of minutes away at least.Has anyone yet wished them luck, and told them that we’re all counting on them?
With sprinkles on top.
Is this walk for a practical purpose, or to verify that it can be done?
Is the Boeing capsule still there?
captain_spalding said:
Is this walk for a practical purpose, or to verify that it can be done?
Rich bloke (Jared Isaacson I think his name is) paid for the flight, it’s his toy.
Tau.Neutrino said:
Is the Boeing capsule still there?
Nah it landed safely a few days ago in a desert in the western US. Un-crewed, of course.
Spiny Norman said:
Tau.Neutrino said:
Is the Boeing capsule still there?
Nah it landed safely a few days ago in a desert in the western US. Un-crewed, of course.
Good. I’m happy it got back safely.
Spiny Norman said:
captain_spalding said:
Is this walk for a practical purpose, or to verify that it can be done?
Rich bloke (Jared Isaacson I think his name is) paid for the flight, it’s his toy.
Ooh.
Recent instances of very wealthy people making excursions into extreme environments give one pause for thought.
captain_spalding said:
Spiny Norman said:
captain_spalding said:
Is this walk for a practical purpose, or to verify that it can be done?
Rich bloke (Jared Isaacson I think his name is) paid for the flight, it’s his toy.
Ooh.
Recent instances of very wealthy people making excursions into extreme environments give one pause for thought.
Fortunately this machine is designed and built by excellent engineers that really know what they’re doing.
Spiny Norman said:
captain_spalding said:
Spiny Norman said:Rich bloke (Jared Isaacson I think his name is) paid for the flight, it’s his toy.
Ooh.
Recent instances of very wealthy people making excursions into extreme environments give one pause for thought.
Fortunately this machine is designed and built by excellent engineers that really know what they’re doing.
Reassuring.
I look forward to their safe and triumphant return.
Thats said, people are going to die in space. People die everywhere that they go.
I just saw this, looks like part of a larger project.
I Built The First LAMINAR FLOW ROCKET ENGINE
https://integza.com/products/laminar-flow-rocket-engine
This rocket has a gyroid structure in it’s combustion chamber which forces the combustion to be laminar. It also uses a new technology that allows to 3D print porous metal.
captain_spalding said:
Spiny Norman said:
captain_spalding said:Ooh.
Recent instances of very wealthy people making excursions into extreme environments give one pause for thought.
Fortunately this machine is designed and built by excellent engineers that really know what they’re doing.
Reassuring.
I look forward to their safe and triumphant return.
Thats said, people are going to die in space. People die everywhere that they go.
Yep.
Cabin pressure dropping now.
Just about to open the hatch now.
Spiny Norman said:
Just about to open the hatch now.
Is ‘Space Oddity’ playing in the background?
captain_spalding said:
Spiny Norman said:
Just about to open the hatch now.
Is ‘Space Oddity’ playing in the background?
Dave will be alright, I’m pretty sure he’s got a key, unless he’s left it on the bench.
Peak Warming Man said:
captain_spalding said:
Spiny Norman said:
Just about to open the hatch now.
Is ‘Space Oddity’ playing in the background?
Dave will be alright, I’m pretty sure he’s got a key, unless he’s left it on the bench.
dave’s not there, man.
First spacewalk all done and he’s back inside now. The second astronaut is heading out now.
Re-pressurising now so all done for the day.
Spiny Norman said:
Re-pressurising now so all done for the day.
All those people in the comments column: “duhh, why didn’t they use the Starlink network, duhh?”.
Spiny Norman said:
Just about to open the hatch now.
“Make… your own kind of music”
The Trachtenberg system is a system of rapid mental calculation. The system consists of a number of readily memorized operations that allow one to perform arithmetic computations very quickly. It was developed by the Russian engineer Jakow Trachtenberg in order to keep his mind occupied while being in a Nazi concentration camp.
Guided tour around the Boeing 747SP Flying Telescope “SOFIA”.
Walkaround tour of a NASA Boeing 747SP flying observatory called SOFIA currently retired and on display at the PIMA Air and Space Museum in Tucson.
Spiny Norman said:
Guided tour around the Boeing 747SP Flying Telescope “SOFIA”.
Walkaround tour of a NASA Boeing 747SP flying observatory called SOFIA currently retired and on display at the PIMA Air and Space Museum in Tucson.
AI can’t cross this line and we don’t know why.
Spiny Norman said:
AI can’t cross this line and we don’t know why.
Interesting
A ~23km long area in Nevada in the USA where atomic bombs were tested underground. North is to the left end of the image.
Quite a lot of them, it would seem.
Spiny Norman said:
A ~23km long area in Nevada in the USA where atomic bombs were tested underground. North is to the left end of the image.
Quite a lot of them, it would seem.
Made a mess of the place.
The SpaceX Polarid Dawn crew are re-entering the atmosphere right now.
Here’s a livestream -
Hey, Bill,
Seen this video on the Blackburn Buccaneer?
https://www.youtube.com/watch?v=ejwbKmHlXRM
It’s rather comprehensive.
580 knots at 20 feet off the deck. Not for the faqint-hearted, them things.
captain_spalding said:
Hey, Bill,Seen this video on the Blackburn Buccaneer?
https://www.youtube.com/watch?v=ejwbKmHlXRM
It’s rather comprehensive.
580 knots at 20 feet off the deck. Not for the faqint-hearted, them things.
I haven’t watched that one yet, but I have a copy of it for later.
I’ve LOVE to try 580 kts at 20’ !!
(Keep the birds away please though)
Spiny Norman said:
captain_spalding said:
Hey, Bill,Seen this video on the Blackburn Buccaneer?
https://www.youtube.com/watch?v=ejwbKmHlXRM
It’s rather comprehensive.
580 knots at 20 feet off the deck. Not for the faqint-hearted, them things.
I haven’t watched that one yet, but I have a copy of it for later.
I’ve LOVE to try 580 kts at 20’ !!
(Keep the birds away please though)
I’ve been down to 50 feet at 400 kts. Then the bastard briefly inverted it at 100 feet.
The world goes by terribly quickly.
captain_spalding said:
Spiny Norman said:
captain_spalding said:
Hey, Bill,Seen this video on the Blackburn Buccaneer?
https://www.youtube.com/watch?v=ejwbKmHlXRM
It’s rather comprehensive.
580 knots at 20 feet off the deck. Not for the faqint-hearted, them things.
I haven’t watched that one yet, but I have a copy of it for later.
I’ve LOVE to try 580 kts at 20’ !!
(Keep the birds away please though)
I’ve been down to 50 feet at 400 kts. Then the bastard briefly inverted it at 100 feet.
The world goes by terribly quickly.
I can imagine!
Best I’ve managed is about 260 kts (redline in a Citation) just above the runway.
When i ‘remarked’ about it to him later, Rod said ‘i could have gone lower, y’know’.
I assured him that if he had, he would have done it alone. And without either a canopy, or a second seat in the plane.
captain_spalding said:
When i ‘remarked’ about it to him later, Rod said ‘i could have gone lower, y’know’.I assured him that if he had, he would have done it alone. And without either a canopy, or a second seat in the plane.
Not worth the crushed spine. :)
An Electromagnetic Vortex Cannon, Finally!
Researchers say they’ve found a way to create a freely propagating vortex ring, like a smoke ring, but with electromagnetic waves. Why does this even matter? What might this discovery be used for? Let’s take a look.
We Built a Venus Rover so NASA Didn’t Have To.
This is the story of my final year university project. My team built a clockwork rover to explore the surface of Venus, with help from NASA JPL’s Dr Jonathan Sauder – the original architect of the concept.
https://www.youtube.com/watch?v=diTrTZ02z7w
More interesting that I thought it’d be, as the rover has effectively no electronics in it. It uses a mechanical ‘computer’ to determine that an obstacle is too large and to go left or right around it. They simulate AND/OR/NOR etc gates with small mechanisms.
The fastest spinning celestial object in the universe is a Neutron star called PSR J1748-2446.
It rotates 716 times every second, so its equator moves at about 25% the speed of light.
It is also 50 trillion times the density of lead and has a magnetic field a trillion times stronger than the Sun’s.
Spiny Norman said:
The fastest spinning celestial object in the universe is a Neutron star called PSR J1748-2446.
It rotates 716 times every second, so its equator moves at about 25% the speed of light.
It is also 50 trillion times the density of lead and has a magnetic field a trillion times stronger than the Sun’s.
Wtf
dv said:
Spiny Norman said:
The fastest spinning celestial object in the universe is a Neutron star called PSR J1748-2446.
It rotates 716 times every second, so its equator moves at about 25% the speed of light.
It is also 50 trillion times the density of lead and has a magnetic field a trillion times stronger than the Sun’s.
Wtf
So how do they measure the density of something 18,000 light years away?
dv said:
Spiny Norman said:
The fastest spinning celestial object in the universe is a Neutron star called PSR J1748-2446.
It rotates 716 times every second, so its equator moves at about 25% the speed of light.
It is also 50 trillion times the density of lead and has a magnetic field a trillion times stronger than the Sun’s.
Wtf
exactly least they could do is give those quantities in si units
The Rev Dodgson said:
dv said:
Spiny Norman said:
The fastest spinning celestial object in the universe is a Neutron star called PSR J1748-2446.
It rotates 716 times every second, so its equator moves at about 25% the speed of light.
It is also 50 trillion times the density of lead and has a magnetic field a trillion times stronger than the Sun’s.
Wtf
So how do they measure the density of something 18,000 light years away?
same way you measure the density of something 0.000018 light years away, you don’t, you measure the mass and the volume and do the mathematic
SCIENCE said:
dv said:
Spiny Norman said:
The fastest spinning celestial object in the universe is a Neutron star called PSR J1748-2446.
It rotates 716 times every second, so its equator moves at about 25% the speed of light.
It is also 50 trillion times the density of lead and has a magnetic field a trillion times stronger than the Sun’s.
Wtf
exactly least they could do is give those quantities in si units
1.1340 × 10^16 kg/m^3
dv said:
Spiny Norman said:
The fastest spinning celestial object in the universe is a Neutron star called PSR J1748-2446.
It rotates 716 times every second, so its equator moves at about 25% the speed of light.
It is also 50 trillion times the density of lead and has a magnetic field a trillion times stronger than the Sun’s.
Wtf
Amazing.
SCIENCE said:
The Rev Dodgson said:
dv said:
Wtf
So how do they measure the density of something 18,000 light years away?
same way you measure the density of something 0.000018 light years away, you don’t, you measure the mass and the volume and do the mathematic
But how do you measure the volume of something 18,000 light years away?
SCIENCE said:
The Rev Dodgson said:
dv said:
Wtf
So how do they measure the density of something 18,000 light years away?
same way you measure the density of something 0.000018 light years away, you don’t, you measure the mass and the volume and do the mathematic
D = M/V
The Rev Dodgson said:
SCIENCE said:
The Rev Dodgson said:
So how do they measure the density of something 18,000 light years away?
same way you measure the density of something 0.000018 light years away, you don’t, you measure the mass and the volume and do the mathematic
But how do you measure the volume of something 18,000 light years away?
you measure its diameter and then multiply by its diameter and then multiply by its diameter and then divide by 1.9 easy
The Rev Dodgson said:
SCIENCE said:The Rev Dodgson said:
So how do they measure the density of something 18,000 light years away?
same way you measure the density of something 0.000018 light years away, you don’t, you measure the mass and the volume and do the mathematic
But how do you measure the volume of something 18,000 light years away?
If the neutron star is assumed to contain less than two times the mass of the Sun, within the typical range of neutron stars, its radius is constrained to be less than 16 km. At its equator it is spinning at approximately 24% of the speed of light, or over 70,000 km per second.
wiki.
The Rev Dodgson said:
SCIENCE said:The Rev Dodgson said:
So how do they measure the density of something 18,000 light years away?
same way you measure the density of something 0.000018 light years away, you don’t, you measure the mass and the volume and do the mathematic
But how do you measure the volume of something 18,000 light years away?
It’s inferred rather than measured.
First, the distance to the object is calculated using methods outlined in the cosmic distance ladder. Once the distance is known, the apparent brightness can help estimate the size of the object. Analyzing emitted electromagnetic radiation provides information about the object’s composition.
From the size and composition, astronomers can estimate mass and density, which can then be used to calculate volume. This combination of methods allows for a reasonable estimate of the volume of distant objects.
Something like that, any way.
JudgeMental said:
The Rev Dodgson said:
SCIENCE said:
same way you measure the density of something 0.000018 light years away, you don’t, you measure the mass and the volume and do the mathematic
But how do you measure the volume of something 18,000 light years away?
If the neutron star is assumed to contain less than two times the mass of the Sun, within the typical range of neutron stars, its radius is constrained to be less than 16 km. At its equator it is spinning at approximately 24% of the speed of light, or over 70,000 km per second.
wiki.
yeah we went to the theatre and they taught us about neutron stars, the ndp constrains the density and mass to specific relation
SCIENCE said:
The Rev Dodgson said:
SCIENCE said:
same way you measure the density of something 0.000018 light years away, you don’t, you measure the mass and the volume and do the mathematic
But how do you measure the volume of something 18,000 light years away?
you measure its diameter and then multiply by its diameter and then multiply by its diameter and then divide by 1.9 easy
Many thanks to you and Tamb for adding to my education, but how do you measure the diameter?
JudgeMental said:
The Rev Dodgson said:
SCIENCE said:same way you measure the density of something 0.000018 light years away, you don’t, you measure the mass and the volume and do the mathematic
But how do you measure the volume of something 18,000 light years away?
If the neutron star is assumed to contain less than two times the mass of the Sun, within the typical range of neutron stars, its radius is constrained to be less than 16 km. At its equator it is spinning at approximately 24% of the speed of light, or over 70,000 km per second.
wiki.
OK, so it’s based on an assumption.
SCIENCE said:
JudgeMental said:
The Rev Dodgson said:
But how do you measure the volume of something 18,000 light years away?
If the neutron star is assumed to contain less than two times the mass of the Sun, within the typical range of neutron stars, its radius is constrained to be less than 16 km. At its equator it is spinning at approximately 24% of the speed of light, or over 70,000 km per second.
wiki.
yeah we went to the theatre and they taught us about neutron stars, the ndp constrains the density and mass to specific relation
What is an ndp?
The Rev Dodgson said:
JudgeMental said:
The Rev Dodgson said:But how do you measure the volume of something 18,000 light years away?
If the neutron star is assumed to contain less than two times the mass of the Sun, within the typical range of neutron stars, its radius is constrained to be less than 16 km. At its equator it is spinning at approximately 24% of the speed of light, or over 70,000 km per second.
wiki.
OK, so it’s based on an assumption.
backed by maths I would think. but who knows. cosmologists probably just make stuff up to keep the funding coming in.
The Rev Dodgson said:
SCIENCE said:JudgeMental said:
If the neutron star is assumed to contain less than two times the mass of the Sun, within the typical range of neutron stars, its radius is constrained to be less than 16 km. At its equator it is spinning at approximately 24% of the speed of light, or over 70,000 km per second.
wiki.
yeah we went to the theatre and they taught us about neutron stars, the ndp constrains the density and mass to specific relation
What is an ndp?
neutron degeneracy pressure maybe.
JudgeMental said:
The Rev Dodgson said:
SCIENCE said:yeah we went to the theatre and they taught us about neutron stars, the ndp constrains the density and mass to specific relation
What is an ndp?
neutron degeneracy pressure maybe.
the “maybe” was an because my answer was an assumption. but seeing as we a talking about neutron stars it is a pretty good assumption.
JudgeMental said:
The Rev Dodgson said:
JudgeMental said:If the neutron star is assumed to contain less than two times the mass of the Sun, within the typical range of neutron stars, its radius is constrained to be less than 16 km. At its equator it is spinning at approximately 24% of the speed of light, or over 70,000 km per second.
wiki.
OK, so it’s based on an assumption.
backed by maths I would think. but who knows. cosmologists probably just make stuff up to keep the funding coming in.
I’m not suggesting they just make it up. I’m interested in how they estimate these things. So far it sounds like they are extrapolating far beyond anything there is any real observational evidence for.
The Rev Dodgson said:
JudgeMental said:
The Rev Dodgson said:OK, so it’s based on an assumption.
backed by maths I would think. but who knows. cosmologists probably just make stuff up to keep the funding coming in.
I’m not suggesting they just make it up. I’m interested in how they estimate these things. So far it sounds like they are extrapolating far beyond anything there is any real observational evidence for.
Anyway, I shall go away and read https://en.wikipedia.org/wiki/Degenerate_matter
We can take it for a fact that neutron stars are extremely dense objects.
Their masses and approximate volume can be measured by observing their roles in binary systems, for example.
Bubblecar said:
We can take it for a fact that neutron stars are extremely dense objects.Their masses and approximate volume can be measured by observing their roles in binary systems, for example.
and this is in a binary system.
Neutron degeneracy pressure is what keeps the neutron star from collapsing further, but can be overcome with sufficient mass so that the object becomes a black hole.
Bubblecar said:
We can take it for a fact that neutron stars are extremely dense objects.Their masses and approximate volume can be measured by observing their roles in binary systems, for example.
I’m happy to accept point one and estimates of mass (for now), but I don’t think that observations of binary systems provide any evidence for diameter estimates, do they?
The Rev Dodgson said:
SCIENCE said:The Rev Dodgson said:
So how do they measure the density of something 18,000 light years away?
same way you measure the density of something 0.000018 light years away, you don’t, you measure the mass and the volume and do the mathematic
But how do you measure the volume of something 18,000 light years away?
Fair to say they didn’t get out the calipers and triple beam so we may assume that they have used the data they have, and their knowledge of similar objects from physical theory and observations of other objects in that class, and made an estimate.
NASA’s Neutron star Interior Composition Explorer (NICER), on the ISS, is taking some precise measurements.
>….Since no laboratory experiment can reproduce neutron star conditions, the only option for studying this exceptional state of matter is to observe neutron stars themselves—inferring what’s going on inside the star from basic properties such as mass and size. Such measurements, however, are no easy feat. Up until today, about two thousand neutron stars have been discovered, but only a handful of them have been sized up, typically by monitoring the x-ray emission of gas surrounding the star.
NICER has developed a unique sizing method applicable to rapidly rotating neutron stars known as pulsars. As pulsars rotate, hot spots on their surface emit x rays that scan the cosmos like lighthouse beams. The experiment monitors the pulsar’s oscillatory x-ray brightness, “time stamping” the arrival of each x-ray photon with a precision of about 100 ns. The path that these photons take is distorted by the gravitational warping of spacetime around the star, allowing some hot spots to remain visible even as they rotate to the far side of the star.
From the x-ray time-stamped data, the researchers reconstruct the gravitational potential and, in turn, infer the star size. “The combination of x-ray spectroscopy capabilities with timing is a unique feature of NICER,” which allows researchers to fully exploit information on the star’s spin to constrain its properties, says NICER science lead Zaven Arzoumanian of NASA’s Goddard Space Flight Center in Maryland.
The NICER Collaboration first used this method in 2019 to measure PSR J0030, a pulsar 1000 light years from Earth. Weighing 1.4 solar masses, J0030 was found to have a diameter of about 26 km. In the new measurement, the collaboration turned to the most massive known neutron star, PSR J0740, in the “giraffe” constellation. Nearly 4 times more distant than J0030, J0740 is 20 times fainter and was thus a “stretch goal for the experiment,” says Arzoumanian. But its mass (2.1 solar masses) makes this pulsar “so exceptional” that the team decided to devote a significant amount of time to measuring it, he says.
The Rev Dodgson said:
SCIENCE said:
The Rev Dodgson said:
But how do you measure the volume of something 18,000 light years away?
you measure its diameter and then multiply by its diameter and then multiply by its diameter and then divide by 1.9 easy
Many thanks to you and Tamb for adding to my education, but how do you measure the diameter?
The Rev Dodgson said:
JudgeMental said:
The Rev Dodgson said:
OK, so it’s based on an assumption.
backed by maths I would think. but who knows. cosmologists probably just make stuff up to keep the funding coming in.
I’m not suggesting they just make it up. I’m interested in how they estimate these things. So far it sounds like they are extrapolating far beyond anything there is any real observational evidence for.
so cosmology is just a secular opium of the people
dv said:
The Rev Dodgson said:
SCIENCE said:same way you measure the density of something 0.000018 light years away, you don’t, you measure the mass and the volume and do the mathematic
But how do you measure the volume of something 18,000 light years away?
Fair to say they didn’t get out the calipers and triple beam so we may assume that they have used the data they have, and their knowledge of similar objects from physical theory and observations of other objects in that class, and made an estimate.
Also fair to say that, since there is no accepted theory combining gravity and quantum effects, these estimates may be way out?
What about the speed of rotation?
Is there a reliable way to measure that?
The Rev Dodgson said:
dv said:
The Rev Dodgson said:But how do you measure the volume of something 18,000 light years away?
Fair to say they didn’t get out the calipers and triple beam so we may assume that they have used the data they have, and their knowledge of similar objects from physical theory and observations of other objects in that class, and made an estimate.
Also fair to say that, since there is no accepted theory combining gravity and quantum effects, these estimates may be way out?
What about the speed of rotation?
Is there a reliable way to measure that?
You can look at this smeor of frequencies To estimate Doppler shift, en hence surface velocity and using frequency can therefore estimate diameter.
dv said:
The Rev Dodgson said:
dv said:Fair to say they didn’t get out the calipers and triple beam so we may assume that they have used the data they have, and their knowledge of similar objects from physical theory and observations of other objects in that class, and made an estimate.
Also fair to say that, since there is no accepted theory combining gravity and quantum effects, these estimates may be way out?
What about the speed of rotation?
Is there a reliable way to measure that?
You can look at this smeor of frequencies To estimate Doppler shift, en hence surface velocity and using frequency can therefore estimate diameter.
Don’t they often have a margin of error plus or minus to show its an estimate
Cymek said:
dv said:
The Rev Dodgson said:Also fair to say that, since there is no accepted theory combining gravity and quantum effects, these estimates may be way out?
What about the speed of rotation?
Is there a reliable way to measure that?
You can look at this smeor of frequencies To estimate Doppler shift, en hence surface velocity and using frequency can therefore estimate diameter.
Don’t they often have a margin of error plus or minus to show its an estimate
Yes. And I’m sure that appears in the journal article, but not necessarily in a Popular Science piece.
In 2010, the United States Air Force created the world’s 33rd-fastest computer inside its own Air Force Research Laboratory, using 1,760 Sony PlayStation 3 consoles.
They called it the “Condor Cluster,” and it was the Department of Defense’s fastest computer.
The USAF put the computer in Rome, New York, near Syracuse, and intended to use the computer for radar enhancement, pattern recognition, satellite imagery processing and artificial intelligence research for current and future Air Force projects and operations.
Because a PlayStation cost $300 at the time, together, the PlayStations formed the core of the computer for a cost of roughly $1 million, 10% of the price of a conventional supercomputer.
The result was a 500 TeraFLOPS Heterogeneous Cluster powered by PS3s but connected to subcluster heads of dual-quad Xeons with multiple GPGPUs (general-purpose graphics processing units). The video-game consoles consumed 90% less energy than any alternative.
And it’s apparently legit.
https://phys.org/news/2010-12-air-playstation-3s-supercomputer.html
Wreckage Of Titan Submersible Reveal How It Imploded.
The US Coast Guard has just begun its public inquiry into the Titan Submersible accident, and in the process has released a number of documents, including, critically footage from a remotely operated vehicle showing the wreckages on the ocean floor.
I believe this wreckage confirms that the failure began at the interface between the carbon fiber pressure hull and the forward titanium interface ring. A great deal of composite debris has been pushed backwards into the rear hemisphere, while almost none is visible near the forward sphere.
https://www.youtube.com/watch?v=CxBtZmyPzVA
Cheesus, just a recipe for disaster.
Phoebus-2A: LASL’s 4000 Megawatt Nuclear Rocket Engine.
The Phoebus-2A was the most powerful nuclear reactor of any type ever created. Unlike most reactors, which generate electricity, the Phoebus-2A produced thrust to take astronauts to Mars. And it worked! Unfortunately, LASL’s Rover Program was never given permission to flight test this remarkable rocket engine. The program collapsed – along with America’s ambition to visit Mars – in the early 1970s. Could we see nuclear rockets again in the future?
We’ve found a new planet, home to octillions of the most extreme beings living in the most absurd and deadly hellscape. In absolute darkness, crushed by the weight of mountains, starved of oxygen, cooked alive, bathed in acid, salt or radiation. And yet, they live for thousands, perhaps millions of years! It turns out, this planet is not in space – it is inside the crust of Earth!
This is the deep biosphere and we basically learned that it exists yesterday. Its volume is at least twice as large as all the Earth’s oceans, home to more microbes than the rest of the entire planet.Their total biomass is more than 20 times greater than all humans, livestock, and animal wildlife.
Let’s descend into this mad, deadly world where none of the rules we thought are mandatory for life apply.
Where Is Everything In The Universe Going?
History of the Universe.
New conveyor belt-like catalyst uses electricity to turn CO2 into methane, plastic.
A collaboration between researchers at the University of Bonn in Germany and the University of Montreal in Canada has led to the development of a novel catalyst material that can help synthesize methane directly from carbon dioxide (CO2) using electricity.
Even as countries look to reduce their carbon emissions in the future, climate change induced by carbon dioxide gas in the atmosphere remains a problem that must be tackled.
Since CO2 can be trapped from the atmosphere and is a relatively simple molecule to work with, researchers have also developed ways to convert it into useful products such as fuel or feedstock for other applications. Methane is one such feedstock molecule that can be produced from CO2.
Methanation of CO2
Both CO2 and methane (CH4) contain a central carbon atom, and converting the CO2 into the latter requires removing the oxygen atoms and replacing them with hydrogen atoms.
The process has been achieved before using temperatures as high as 600 Fahrenheit (320 degrees Celsius). However, this requires using fossil fuels, which release CO2 into the atmosphere, defeating the purpose of the exercise.
A research team led by Nikolay Kornienko, a professor at the University of Bonn, turned to electricity to power a reaction between CO2 and water that can produce methane.
“By using climate-friendly electricity, we can produce methane that doesn’t contribute to global warming,” said Kornienko in a statement.
https://interestingengineering.com/innovation/catalyst-converts-co2-methane-plastics
Spiny Norman said:
New conveyor belt-like catalyst uses electricity to turn CO2 into methane, plastic.A collaboration between researchers at the University of Bonn in Germany and the University of Montreal in Canada has led to the development of a novel catalyst material that can help synthesize methane directly from carbon dioxide (CO2) using electricity.
Even as countries look to reduce their carbon emissions in the future, climate change induced by carbon dioxide gas in the atmosphere remains a problem that must be tackled.
Since CO2 can be trapped from the atmosphere and is a relatively simple molecule to work with, researchers have also developed ways to convert it into useful products such as fuel or feedstock for other applications. Methane is one such feedstock molecule that can be produced from CO2.
Methanation of CO2
Both CO2 and methane (CH4) contain a central carbon atom, and converting the CO2 into the latter requires removing the oxygen atoms and replacing them with hydrogen atoms.The process has been achieved before using temperatures as high as 600 Fahrenheit (320 degrees Celsius). However, this requires using fossil fuels, which release CO2 into the atmosphere, defeating the purpose of the exercise.
A research team led by Nikolay Kornienko, a professor at the University of Bonn, turned to electricity to power a reaction between CO2 and water that can produce methane.
“By using climate-friendly electricity, we can produce methane that doesn’t contribute to global warming,” said Kornienko in a statement.
https://interestingengineering.com/innovation/catalyst-converts-co2-methane-plastics
For several years now, as I listen to how people plan to capture CO2 (from cement, steel production, etc) and then … mumble, mumble mumble:
why not convert it into methane?
The Rev Dodgson said:
Spiny Norman said:
New conveyor belt-like catalyst uses electricity to turn CO2 into methane, plastic.A collaboration between researchers at the University of Bonn in Germany and the University of Montreal in Canada has led to the development of a novel catalyst material that can help synthesize methane directly from carbon dioxide (CO2) using electricity.
Even as countries look to reduce their carbon emissions in the future, climate change induced by carbon dioxide gas in the atmosphere remains a problem that must be tackled.
Since CO2 can be trapped from the atmosphere and is a relatively simple molecule to work with, researchers have also developed ways to convert it into useful products such as fuel or feedstock for other applications. Methane is one such feedstock molecule that can be produced from CO2.
Methanation of CO2
Both CO2 and methane (CH4) contain a central carbon atom, and converting the CO2 into the latter requires removing the oxygen atoms and replacing them with hydrogen atoms.The process has been achieved before using temperatures as high as 600 Fahrenheit (320 degrees Celsius). However, this requires using fossil fuels, which release CO2 into the atmosphere, defeating the purpose of the exercise.
A research team led by Nikolay Kornienko, a professor at the University of Bonn, turned to electricity to power a reaction between CO2 and water that can produce methane.
“By using climate-friendly electricity, we can produce methane that doesn’t contribute to global warming,” said Kornienko in a statement.
https://interestingengineering.com/innovation/catalyst-converts-co2-methane-plastics
For several years now, as I listen to how people plan to capture CO2 (from cement, steel production, etc) and then … mumble, mumble mumble:
why not convert it into methane?
What are you going to do with the methane?
If you burn it, it goes back to being CO2. If that original source came from burning coal or calcining limestone, then you aren’t really doing much to reduce emissions. Unless you constantly capture the CO2 and turn it back into methane.
If you just release it, well, methane is a more potent GHG than CO2, so just leaving it as CO2 will do less harm.
The Rev Dodgson said:
Spiny Norman said:
New conveyor belt-like catalyst uses electricity to turn CO2 into methane, plastic.A collaboration between researchers at the University of Bonn in Germany and the University of Montreal in Canada has led to the development of a novel catalyst material that can help synthesize methane directly from carbon dioxide (CO2) using electricity.
Even as countries look to reduce their carbon emissions in the future, climate change induced by carbon dioxide gas in the atmosphere remains a problem that must be tackled.
Since CO2 can be trapped from the atmosphere and is a relatively simple molecule to work with, researchers have also developed ways to convert it into useful products such as fuel or feedstock for other applications. Methane is one such feedstock molecule that can be produced from CO2.
Methanation of CO2
Both CO2 and methane (CH4) contain a central carbon atom, and converting the CO2 into the latter requires removing the oxygen atoms and replacing them with hydrogen atoms.The process has been achieved before using temperatures as high as 600 Fahrenheit (320 degrees Celsius). However, this requires using fossil fuels, which release CO2 into the atmosphere, defeating the purpose of the exercise.
A research team led by Nikolay Kornienko, a professor at the University of Bonn, turned to electricity to power a reaction between CO2 and water that can produce methane.
“By using climate-friendly electricity, we can produce methane that doesn’t contribute to global warming,” said Kornienko in a statement.
https://interestingengineering.com/innovation/catalyst-converts-co2-methane-plastics
For several years now, as I listen to how people plan to capture CO2 (from cement, steel production, etc) and then … mumble, mumble mumble:
why not convert it into methane?
I see no reason why not. I expect that the conversion would take more energy than it produces when burning the methane. But it could be considered a battery (energy storage), if made when there is excess green energy.
Spiny Norman said:
New conveyor belt-like catalyst uses electricity to turn CO2 into methane, plastic.A collaboration between researchers at the University of Bonn in Germany and the University of Montreal in Canada has led to the development of a novel catalyst material that can help synthesize methane directly from carbon dioxide (CO2) using electricity.
Even as countries look to reduce their carbon emissions in the future, climate change induced by carbon dioxide gas in the atmosphere remains a problem that must be tackled.
Since CO2 can be trapped from the atmosphere and is a relatively simple molecule to work with, researchers have also developed ways to convert it into useful products such as fuel or feedstock for other applications. Methane is one such feedstock molecule that can be produced from CO2.
Methanation of CO2
Both CO2 and methane (CH4) contain a central carbon atom, and converting the CO2 into the latter requires removing the oxygen atoms and replacing them with hydrogen atoms.The process has been achieved before using temperatures as high as 600 Fahrenheit (320 degrees Celsius). However, this requires using fossil fuels, which release CO2 into the atmosphere, defeating the purpose of the exercise.
A research team led by Nikolay Kornienko, a professor at the University of Bonn, turned to electricity to power a reaction between CO2 and water that can produce methane.
“By using climate-friendly electricity, we can produce methane that doesn’t contribute to global warming,” said Kornienko in a statement.
https://interestingengineering.com/innovation/catalyst-converts-co2-methane-plastics
The human race just loves settin’ fire to stuff, don’t they. Just can’t help themselves, hey what but.
party_pants said:
The Rev Dodgson said:
Spiny Norman said:
New conveyor belt-like catalyst uses electricity to turn CO2 into methane, plastic.A collaboration between researchers at the University of Bonn in Germany and the University of Montreal in Canada has led to the development of a novel catalyst material that can help synthesize methane directly from carbon dioxide (CO2) using electricity.
Even as countries look to reduce their carbon emissions in the future, climate change induced by carbon dioxide gas in the atmosphere remains a problem that must be tackled.
Since CO2 can be trapped from the atmosphere and is a relatively simple molecule to work with, researchers have also developed ways to convert it into useful products such as fuel or feedstock for other applications. Methane is one such feedstock molecule that can be produced from CO2.
Methanation of CO2
Both CO2 and methane (CH4) contain a central carbon atom, and converting the CO2 into the latter requires removing the oxygen atoms and replacing them with hydrogen atoms.The process has been achieved before using temperatures as high as 600 Fahrenheit (320 degrees Celsius). However, this requires using fossil fuels, which release CO2 into the atmosphere, defeating the purpose of the exercise.
A research team led by Nikolay Kornienko, a professor at the University of Bonn, turned to electricity to power a reaction between CO2 and water that can produce methane.
“By using climate-friendly electricity, we can produce methane that doesn’t contribute to global warming,” said Kornienko in a statement.
https://interestingengineering.com/innovation/catalyst-converts-co2-methane-plastics
For several years now, as I listen to how people plan to capture CO2 (from cement, steel production, etc) and then … mumble, mumble mumble:
why not convert it into methane?
What are you going to do with the methane?
If you burn it, it goes back to being CO2. If that original source came from burning coal or calcining limestone, then you aren’t really doing much to reduce emissions. Unless you constantly capture the CO2 and turn it back into methane.
If you just release it, well, methane is a more potent GHG than CO2, so just leaving it as CO2 will do less harm.
Methane could be used to power gas turbines when there is insufficient green energy to power the grid. It can also be used as a fuel for heavy transport. Methane can also be used as the feedstock for agricultural chemicals and plastics.
Michael V said:
party_pants said:
The Rev Dodgson said:For several years now, as I listen to how people plan to capture CO2 (from cement, steel production, etc) and then … mumble, mumble mumble:
why not convert it into methane?
What are you going to do with the methane?
If you burn it, it goes back to being CO2. If that original source came from burning coal or calcining limestone, then you aren’t really doing much to reduce emissions. Unless you constantly capture the CO2 and turn it back into methane.
If you just release it, well, methane is a more potent GHG than CO2, so just leaving it as CO2 will do less harm.
Methane could be used to power gas turbines when there is insufficient green energy to power the grid. It can also be used as a fuel for heavy transport. Methane can also be used as the feedstock for agricultural chemicals and plastics.
Sounds fair.
party_pants said:
The Rev Dodgson said:
Spiny Norman said:
New conveyor belt-like catalyst uses electricity to turn CO2 into methane, plastic.A collaboration between researchers at the University of Bonn in Germany and the University of Montreal in Canada has led to the development of a novel catalyst material that can help synthesize methane directly from carbon dioxide (CO2) using electricity.
Even as countries look to reduce their carbon emissions in the future, climate change induced by carbon dioxide gas in the atmosphere remains a problem that must be tackled.
Since CO2 can be trapped from the atmosphere and is a relatively simple molecule to work with, researchers have also developed ways to convert it into useful products such as fuel or feedstock for other applications. Methane is one such feedstock molecule that can be produced from CO2.
Methanation of CO2
Both CO2 and methane (CH4) contain a central carbon atom, and converting the CO2 into the latter requires removing the oxygen atoms and replacing them with hydrogen atoms.The process has been achieved before using temperatures as high as 600 Fahrenheit (320 degrees Celsius). However, this requires using fossil fuels, which release CO2 into the atmosphere, defeating the purpose of the exercise.
A research team led by Nikolay Kornienko, a professor at the University of Bonn, turned to electricity to power a reaction between CO2 and water that can produce methane.
“By using climate-friendly electricity, we can produce methane that doesn’t contribute to global warming,” said Kornienko in a statement.
https://interestingengineering.com/innovation/catalyst-converts-co2-methane-plastics
For several years now, as I listen to how people plan to capture CO2 (from cement, steel production, etc) and then … mumble, mumble mumble:
why not convert it into methane?
What are you going to do with the methane?
If you burn it, it goes back to being CO2. If that original source came from burning coal or calcining limestone, then you aren’t really doing much to reduce emissions. Unless you constantly capture the CO2 and turn it back into methane.
If you just release it, well, methane is a more potent GHG than CO2, so just leaving it as CO2 will do less harm.
You use it as a fuel for those things where electricity is not a practical alternative.
The Rev Dodgson said:
Spiny Norman said:
New conveyor belt-like catalyst uses electricity to turn CO2 into methane, plastic.
A collaboration between researchers at the University of Bonn in Germany and the University of Montreal in Canada has led to the development of a novel catalyst material that can help synthesize methane directly from carbon dioxide (CO2) using electricity.
Even as countries look to reduce their carbon emissions in the future, climate change induced by carbon dioxide gas in the atmosphere remains a problem that must be tackled.
Since CO2 can be trapped from the atmosphere and is a relatively simple molecule to work with, researchers have also developed ways to convert it into useful products such as fuel or feedstock for other applications. Methane is one such feedstock molecule that can be produced from CO2.
Methanation of CO2
Both CO2 and methane (CH4) contain a central carbon atom, and converting the CO2 into the latter requires removing the oxygen atoms and replacing them with hydrogen atoms.The process has been achieved before using temperatures as high as 600 Fahrenheit (320 degrees Celsius). However, this requires using fossil fuels, which release CO2 into the atmosphere, defeating the purpose of the exercise.
A research team led by Nikolay Kornienko, a professor at the University of Bonn, turned to electricity to power a reaction between CO2 and water that can produce methane.
“By using climate-friendly electricity, we can produce methane that doesn’t contribute to global warming,” said Kornienko in a statement.
https://interestingengineering.com/innovation/catalyst-converts-co2-methane-plastics
For several years now, as I listen to how people plan to capture CO2 (from cement, steel production, etc) and then … mumble, mumble mumble:
why not convert it into methane?
pretty sure geniuses on forums such as these have been advocating for renewable hydrocarbon neosynthesis plenty but yeah
The Rev Dodgson said:
Spiny Norman said:
New conveyor belt-like catalyst uses electricity to turn CO2 into methane, plastic.A collaboration between researchers at the University of Bonn in Germany and the University of Montreal in Canada has led to the development of a novel catalyst material that can help synthesize methane directly from carbon dioxide (CO2) using electricity.
Even as countries look to reduce their carbon emissions in the future, climate change induced by carbon dioxide gas in the atmosphere remains a problem that must be tackled.
Since CO2 can be trapped from the atmosphere and is a relatively simple molecule to work with, researchers have also developed ways to convert it into useful products such as fuel or feedstock for other applications. Methane is one such feedstock molecule that can be produced from CO2.
Methanation of CO2
Both CO2 and methane (CH4) contain a central carbon atom, and converting the CO2 into the latter requires removing the oxygen atoms and replacing them with hydrogen atoms.The process has been achieved before using temperatures as high as 600 Fahrenheit (320 degrees Celsius). However, this requires using fossil fuels, which release CO2 into the atmosphere, defeating the purpose of the exercise.
A research team led by Nikolay Kornienko, a professor at the University of Bonn, turned to electricity to power a reaction between CO2 and water that can produce methane.
“By using climate-friendly electricity, we can produce methane that doesn’t contribute to global warming,” said Kornienko in a statement.
https://interestingengineering.com/innovation/catalyst-converts-co2-methane-plastics
For several years now, as I listen to how people plan to capture CO2 (from cement, steel production, etc) and then … mumble, mumble mumble:
why not convert it into methane?
as long as we use the methane , yeah.
The future of Nuclear = Small, Mobile, Microreactors | Radiant
https://www.youtube.com/watch?v=LTgS7tOOzsE
They are small, only a megawatt each. Quite interesting technology though.
Spiny Norman said:
The future of Nuclear = Small, Mobile, Microreactors | Radianthttps://www.youtube.com/watch?v=LTgS7tOOzsE
They are small, only a megawatt each. Quite interesting technology though.
1MW is actually a nice size for its intended use. That would be a good size to have one per suburb/hospital to supply baseload.
Dark Orange said:
Spiny Norman said:
The future of Nuclear = Small, Mobile, Microreactors | Radianthttps://www.youtube.com/watch?v=LTgS7tOOzsE
They are small, only a megawatt each. Quite interesting technology though.
1MW is actually a nice size for its intended use. That would be a good size to have one per suburb/hospital to supply baseload.
Baseload is obsolete thinking. It is a bug not a feature, of steam turbine generators.
Dark Orange said:
Spiny Norman said:
The future of Nuclear = Small, Mobile, Microreactors | Radianthttps://www.youtube.com/watch?v=LTgS7tOOzsE
They are small, only a megawatt each. Quite interesting technology though.
1MW is actually a nice size for its intended use. That would be a good size to have one per suburb/hospital to supply baseload.
I’m not convinced that having 1000’s of small nuclear reactors scattered all over the World is actually a good idea.
party_pants said:
Dark Orange said:
Spiny Norman said:
The future of Nuclear = Small, Mobile, Microreactors | Radianthttps://www.youtube.com/watch?v=LTgS7tOOzsE
They are small, only a megawatt each. Quite interesting technology though.
1MW is actually a nice size for its intended use. That would be a good size to have one per suburb/hospital to supply baseload.
Baseload is obsolete thinking. It is a bug not a feature, of steam turbine generators.
I agree.
And I don’t recall seeing it put so succinctly before.
The Rev Dodgson said:
Dark Orange said:
Spiny Norman said:
The future of Nuclear = Small, Mobile, Microreactors | Radianthttps://www.youtube.com/watch?v=LTgS7tOOzsE
They are small, only a megawatt each. Quite interesting technology though.
1MW is actually a nice size for its intended use. That would be a good size to have one per suburb/hospital to supply baseload.
I’m not convinced that having 1000’s of small nuclear reactors scattered all over the World is actually a good idea.
Seems that it would be increasing the risk factor?
party_pants said:
Dark Orange said:
Spiny Norman said:
The future of Nuclear = Small, Mobile, Microreactors | Radianthttps://www.youtube.com/watch?v=LTgS7tOOzsE
They are small, only a megawatt each. Quite interesting technology though.
1MW is actually a nice size for its intended use. That would be a good size to have one per suburb/hospital to supply baseload.
Baseload is obsolete thinking. It is a bug not a feature, of steam turbine generators.
A lot of people say that and I think the issue is etymological in nature. I have have spent my entire life in an industry that defines “Base Load” as the minimal load on a system where people aren’t actively using that system. Other people define it differently, but at the end of the day you still end up with energy being used when people aren’t at home using it.
The Rev Dodgson said:
Dark Orange said:
Spiny Norman said:
The future of Nuclear = Small, Mobile, Microreactors | Radianthttps://www.youtube.com/watch?v=LTgS7tOOzsE
They are small, only a megawatt each. Quite interesting technology though.
1MW is actually a nice size for its intended use. That would be a good size to have one per suburb/hospital to supply baseload.
I’m not convinced that having 1000’s of small nuclear reactors scattered all over the World is actually a good idea.
I can’t disagree. Technically, it is a good solution. Geopolitically, it isn’t.
Dark Orange said:
party_pants said:
Dark Orange said:1MW is actually a nice size for its intended use. That would be a good size to have one per suburb/hospital to supply baseload.
Baseload is obsolete thinking. It is a bug not a feature, of steam turbine generators.
A lot of people say that and I think the issue is etymological in nature. I have have spent my entire life in an industry that defines “Base Load” as the minimal load on a system where people aren’t actively using that system. Other people define it differently, but at the end of the day you still end up with energy being used when people aren’t at home using it.
Closely linked with spinning reserve.
Dark Orange said:
party_pants said:
Dark Orange said:1MW is actually a nice size for its intended use. That would be a good size to have one per suburb/hospital to supply baseload.
Baseload is obsolete thinking. It is a bug not a feature, of steam turbine generators.
A lot of people say that and I think the issue is etymological in nature. I have have spent my entire life in an industry that defines “Base Load” as the minimal load on a system where people aren’t actively using that system. Other people define it differently, but at the end of the day you still end up with energy being used when people aren’t at home using it.
I think the future is intermittent sources with large scale storage. Base load generation to be less and less important. Sure, there are going to be some issues with frequency stabilisation across the grid, but these can be solved in various ways.
what non industrial uses rely on specific frequency at high potential
party_pants said:
Dark Orange said:
party_pants said:Baseload is obsolete thinking. It is a bug not a feature, of steam turbine generators.
A lot of people say that and I think the issue is etymological in nature. I have have spent my entire life in an industry that defines “Base Load” as the minimal load on a system where people aren’t actively using that system. Other people define it differently, but at the end of the day you still end up with energy being used when people aren’t at home using it.
I think the future is intermittent sources with large scale storage. Base load generation to be less and less important. Sure, there are going to be some issues with frequency stabilisation across the grid, but these can be solved in various ways.
I’m more in favour of decentralised small-scale storage. You, as a consumer, have your own storage that you use to buy low and sell high.
This not only addresses supplying the growing need for energy, but directly reduces the growing need for energy by incentivising individuals to reduce their usage to allow them to sell more.
It also reduces the need to increase the network capacity by having the supply systems literally next door to the consumers.
sounds like everyone agrees that renewable microgrids with the options of import export and hydrocarbon neosynthesis will be the solutions of the future oh damn wait was that already
SCIENCE said:
what non industrial uses rely on specific frequency at high potential
As in 50hz @ 230VAC?
Anything with motors and most things with large coils of wire.
Dark Orange said:
SCIENCE said:what non industrial uses rely on specific frequency at high potential
As in 50hz @ 230VAC?
Anything with motors and most things with large coils of wire.
clothes washer then, what else did we forget
SCIENCE said:
Dark Orange said:
SCIENCE said:what non industrial uses rely on specific frequency at high potential
As in 50hz @ 230VAC?
Anything with motors and most things with large coils of wire.
clothes washer then, what else did we forget
Fridges. Exhaust fans, pool pumps, air conditioners, ceiling fans…
Dark Orange said:
SCIENCE said:
Dark Orange said:As in 50hz @ 230VAC?
Anything with motors and most things with large coils of wire.
clothes washer then, what else did we forget
Fridges. Exhaust fans, pool pumps, air conditioners, ceiling fans…
Blenders, juicers, food processors, oven fans, stove hoods…
Breakthrough sun-powered tech pulls lithium from seawater, redefining energy
A membrane-free electrochemical cell separates lithium ions between brine and fresh water using iron-phosphate electrodes.
Researchers have developed a sustainable method to efficiently extract lithium from seawater, addressing the growing demand for renewable energy.
The Solar Transpiration-Powered Lithium Extraction and Storage (STLES) device harnesses sunlight to extract and store lithium from brine.
The method uses iron phosphate electrodes, which have the ability to selectively capture lithium ions from salt water. Once absorbed, the electrodes release the lithium into fresh water, making the extraction process both efficient and environmentally friendly.
https://interestingengineering.com/innovation/sun-powered-tech-pulls-lithium-from-seawater
Dark Orange said:
SCIENCE said:
Dark Orange said:
As in 50hz @ 230VAC?
Anything with motors and most things with large coils of wire.
clothes washer then, what else did we forget
Fridges. Exhaust fans, pool pumps, air conditioners, ceiling fans…
refrigerator maybe, other fans seem like 12 V should cover it, vacuum cleaner we suppose
Michael V said:
Dark Orange said:
SCIENCE said:
clothes washer then, what else did we forget
Fridges. Exhaust fans, pool pumps, air conditioners, ceiling fans…
Blenders, juicers, food processors, oven fans, stove hoods…
oven heating perhaps but reckon the rest could be powered equal to a USB level
SCIENCE said:
Dark Orange said:
SCIENCE said:
clothes washer then, what else did we forget
Fridges. Exhaust fans, pool pumps, air conditioners, ceiling fans…
refrigerator maybe, other fans seem like 12 V should cover it, vacuum cleaner we suppose
Most things could be replaced with more adaptable hardware, but I was talking about stuff in your house right now.
If you were, for instance, building a new house with 24v supply in mind, you could probably buy just about everything off the shelf right now. (Thanks to the prevalence of camper vans and inverters and gas heating)
Debunking the Nuclear-Powered Manhole Cover
In 1957, a high-speed camera caught a cast iron cap moving at 66 kilometres per second. It was being accelerated by a nuclear explosion beneath it. Did the Pascal-B nuclear weapons test actually make a manhole cover the first man-made object in space? Noted Nuclear Zaddy Kyle Hill finally does the math to determine what happened to this infamous object. We can stop making videos about this now. Thanks.
What if Earth grew 1cm every second?
How long would it take for people to notice their weight gain if the mean radius of the world increased by 1 cm every second? (Assuming the average composition of rock were maintained)
Spiny Norman said:
Debunking the Nuclear-Powered Manhole CoverIn 1957, a high-speed camera caught a cast iron cap moving at 66 kilometres per second. It was being accelerated by a nuclear explosion beneath it. Did the Pascal-B nuclear weapons test actually make a manhole cover the first man-made object in space? Noted Nuclear Zaddy Kyle Hill finally does the math to determine what happened to this infamous object. We can stop making videos about this now. Thanks.
https://nuclearweaponarchive.org/Usa/Tests/Brownlee.html
For Pascal B, my calculations were designed to calculate the time and specifics of the shock wave as it reached the cap. I used yields both expected and exaggerated in my calculations, but significant ones. When I described my results to Bill Ogle, the conversation went something like this.
Ogle: “What time does the shock arrive at the top of the pipe?”
RRB: “Thirty one milliseconds.”
Ogle: “And what happens?”
RRB: “The shock reflects back down the hole, but the pressures and temperatures are such that the welded cap is bound to come off the hole.”
Ogle: “How fast does it go?”
RRB: “My calculations are irrelevant on this point. They are only valid in speaking of the shock reflection.”
Ogle: “How fast did it go?”
RRB: “Those numbers are meaningless. I have only a vacuum above the cap. No air, no gravity, no real material strengths in the iron cap. Effectively the cap is just loose, traveling through meaningless space.”
Ogle: And how fast is it going?”
This last question was more of a shout. Bill liked to have a direct answer to each one of his questions.
RRB: “Six times the escape velocity from the earth.”
Bill was quite delighted with the answer, for he had never before heard a velocity given in terms of the escape velocity from the earth! There was much laughter, and the legend was now born, for Bill loved to report to anybody who cared to listen about Brownlee’s units of velocity. He says the cap would escape the earth. (But of course we did not believe that would ever happen.)
Spiny Norman said:
Debunking the Nuclear-Powered Manhole CoverIn 1957, a high-speed camera caught a cast iron cap moving at 66 kilometres per second. It was being accelerated by a nuclear explosion beneath it. Did the Pascal-B nuclear weapons test actually make a manhole cover the first man-made object in space? Noted Nuclear Zaddy Kyle Hill finally does the math to determine what happened to this infamous object. We can stop making videos about this now. Thanks.
So did it?
YouTubes here are slow and jerky.
Oh, and what’s a Zaddy?
Michael V said:
Spiny Norman said:
Debunking the Nuclear-Powered Manhole CoverIn 1957, a high-speed camera caught a cast iron cap moving at 66 kilometres per second. It was being accelerated by a nuclear explosion beneath it. Did the Pascal-B nuclear weapons test actually make a manhole cover the first man-made object in space? Noted Nuclear Zaddy Kyle Hill finally does the math to determine what happened to this infamous object. We can stop making videos about this now. Thanks.
So did it?
YouTubes here are slow and jerky.
Oh, and what’s a Zaddy?
A zaddy is a man “with swag” who is attractive and also fashionable. It appears that it has less to do with age.
JudgeMental said:
Michael V said:
Spiny Norman said:
Debunking the Nuclear-Powered Manhole CoverIn 1957, a high-speed camera caught a cast iron cap moving at 66 kilometres per second. It was being accelerated by a nuclear explosion beneath it. Did the Pascal-B nuclear weapons test actually make a manhole cover the first man-made object in space? Noted Nuclear Zaddy Kyle Hill finally does the math to determine what happened to this infamous object. We can stop making videos about this now. Thanks.
So did it?
YouTubes here are slow and jerky.
Oh, and what’s a Zaddy?
A zaddy is a man “with swag” who is attractive and also fashionable. It appears that it has less to do with age.
I used to have a swag, for sleeping on the ground in the bush.
Michael V said:
JudgeMental said:
Michael V said:So did it?
YouTubes here are slow and jerky.
Oh, and what’s a Zaddy?
A zaddy is a man “with swag” who is attractive and also fashionable. It appears that it has less to do with age.
I used to have a swag, for sleeping on the ground in the bush.
Looxury…
I believe we came to this conclusion some years ago when Dr Karl uncritically repeated the myth, but it is nice to see it covered so analytically.
On the other hand, at around 9:58 he says “no, it was not the fastest manmade object at the time”, and I don’t see how he draws that conclusion.
Witty Rejoinder said:
Michael V said:
JudgeMental said:A zaddy is a man “with swag” who is attractive and also fashionable. It appears that it has less to do with age.
I used to have a swag, for sleeping on the ground in the bush.
Looxury…
Did you also have a jumbuck?
Witty Rejoinder said:
Michael V said:
JudgeMental said:A zaddy is a man “with swag” who is attractive and also fashionable. It appears that it has less to do with age.
I used to have a swag, for sleeping on the ground in the bush.
Looxury…
Jolly swag, man.
dv said:
I believe we came to this conclusion some years ago when Dr Karl uncritically repeated the myth, but it is nice to see it covered so analytically.On the other hand, at around 9:58 he says “no, it was not the fastest manmade object at the time”, and I don’t see how he draws that conclusion.
plus if it were going at 66km per second was that enough time for it to heat up before it left the atmosphere?
Tamb said:
Witty Rejoinder said:
Michael V said:I used to have a swag, for sleeping on the ground in the bush.
Looxury…
Did you also have a jumbuck?
No, sorry. I did have some minced lamb, but I ate it last week.
JudgeMental said:
dv said:
I believe we came to this conclusion some years ago when Dr Karl uncritically repeated the myth, but it is nice to see it covered so analytically.On the other hand, at around 9:58 he says “no, it was not the fastest manmade object at the time”, and I don’t see how he draws that conclusion.
plus if it were going at 66km per second was that enough time for it to heat up before it left the atmosphere?
Yes.
Michael V said:
Tamb said:
Witty Rejoinder said:Looxury…
Did you also have a jumbuck?
No, sorry. I did have some minced lamb, but I ate it last week.
dv said:
JudgeMental said:
dv said:
I believe we came to this conclusion some years ago when Dr Karl uncritically repeated the myth, but it is nice to see it covered so analytically.On the other hand, at around 9:58 he says “no, it was not the fastest manmade object at the time”, and I don’t see how he draws that conclusion.
plus if it were going at 66km per second was that enough time for it to heat up before it left the atmosphere?
Yes.
I like a succinct and confident answer.
dv said:
JudgeMental said:
dv said:
I believe we came to this conclusion some years ago when Dr Karl uncritically repeated the myth, but it is nice to see it covered so analytically.On the other hand, at around 9:58 he says “no, it was not the fastest manmade object at the time”, and I don’t see how he draws that conclusion.
plus if it were going at 66km per second was that enough time for it to heat up before it left the atmosphere?
Yes.
Only skimmed the video, but:
1) It seems highly unlikely that no-one has done this calculation before.
2) It also seems highly unlikely that no-one has done far more detailed calculations before.
3) The video was very annoying.
Tamb said:
Michael V said:
Tamb said:Did you also have a jumbuck?
No, sorry. I did have some minced lamb, but I ate it last week.
With mint sauce?
No, I made “rissoles”, with included Uyghur spices and cooked rice.
JudgeMental said:
dv said:
JudgeMental said:plus if it were going at 66km per second was that enough time for it to heat up before it left the atmosphere?
Yes.
I like a succinct and confident answer.
To put some more detail on that…
Air particles are hitting this thing, or hitting the envelope around this thing, at 66000 m/s.
That’s the speed they’d be hitting it if it were in air heated to 6000000 Kelvin. How long are you expecting a metal lid to last in the centre of the sun?
The Rev Dodgson said:
Only skimmed the video, but:
1) It seems highly unlikely that no-one has done this calculation before.
2) It also seems highly unlikely that no-one has done far more detailed calculations before.
3) The video was very annoying.
I suppose he means “on popular YouTube channels”.
dv said:
JudgeMental said:
dv said:Yes.
I like a succinct and confident answer.
To put some more detail on that…
Air particles are hitting this thing, or hitting the envelope around this thing, at 66000 m/s.
That’s the speed they’d be hitting it if it were in air heated to 6000000 Kelvin. How long are you expecting a metal lid to last in the centre of the sun?
I wouldn’t of asked the question if I knew that. I was going on the fact that some meteors make it to ground zero and aren’t red hot. i was extrapolating.
Michael V said:
Spiny Norman said:
Debunking the Nuclear-Powered Manhole CoverIn 1957, a high-speed camera caught a cast iron cap moving at 66 kilometres per second. It was being accelerated by a nuclear explosion beneath it. Did the Pascal-B nuclear weapons test actually make a manhole cover the first man-made object in space? Noted Nuclear Zaddy Kyle Hill finally does the math to determine what happened to this infamous object. We can stop making videos about this now. Thanks.
So did it?
YouTubes here are slow and jerky.
Oh, and what’s a Zaddy?
I gather from the discussion that it didn’t reach 66 km/s.
What was the calculated actual speed?
And Zaddy is a neologism for a cool dude. Not a word I am likely to use, nor one that I would expect that Mr SN uses.
Michael V said:
Michael V said:
Spiny Norman said:
Debunking the Nuclear-Powered Manhole CoverIn 1957, a high-speed camera caught a cast iron cap moving at 66 kilometres per second. It was being accelerated by a nuclear explosion beneath it. Did the Pascal-B nuclear weapons test actually make a manhole cover the first man-made object in space? Noted Nuclear Zaddy Kyle Hill finally does the math to determine what happened to this infamous object. We can stop making videos about this now. Thanks.
So did it?
YouTubes here are slow and jerky.
Oh, and what’s a Zaddy?
I gather from the discussion that it didn’t reach 66 km/s.
What was the calculated actual speed?
And Zaddy is a neologism for a cool dude. Not a word I am likely to use, nor one that I would expect that Mr SN uses.
I didn’t watch it but I think the standard wisdom is that it burnt up in the atmosphere before entering “space”.
Michael V said:
Michael V said:
Spiny Norman said:
Debunking the Nuclear-Powered Manhole CoverIn 1957, a high-speed camera caught a cast iron cap moving at 66 kilometres per second. It was being accelerated by a nuclear explosion beneath it. Did the Pascal-B nuclear weapons test actually make a manhole cover the first man-made object in space? Noted Nuclear Zaddy Kyle Hill finally does the math to determine what happened to this infamous object. We can stop making videos about this now. Thanks.
So did it?
YouTubes here are slow and jerky.
Oh, and what’s a Zaddy?
I gather from the discussion that it didn’t reach 66 km/s.
What was the calculated actual speed?
He doesn’t address that, and seems to take the 66km/s as read.
Michael V said:
What was the calculated actual speed?
I’ll just put my spherical cow into the vacuum chamber and be right back with a number for you.
JudgeMental said:
Michael V said:What was the calculated actual speed?
I’ll just put my spherical cow into the vacuum chamber and be right back with a number for you.
JudgeMental said:
dv said:
JudgeMental said:I like a succinct and confident answer.
To put some more detail on that…
Air particles are hitting this thing, or hitting the envelope around this thing, at 66000 m/s.
That’s the speed they’d be hitting it if it were in air heated to 6000000 Kelvin. How long are you expecting a metal lid to last in the centre of the sun?
I wouldn’t of asked the question if I knew that. I was going on the fact that some meteors make it to ground zero and aren’t red hot. i was extrapolating.
Okay but meteors are typically reaching the atmosphere at 12 to 18 km/s.
That’s 18% to 27% of the supposed speed of this thing.
That is to say , something like 3 to 7% of the energy to mass ratio of this thing.
dv said:
JudgeMental said:
dv said:To put some more detail on that…
Air particles are hitting this thing, or hitting the envelope around this thing, at 66000 m/s.
That’s the speed they’d be hitting it if it were in air heated to 6000000 Kelvin. How long are you expecting a metal lid to last in the centre of the sun?
I wouldn’t of asked the question if I knew that. I was going on the fact that some meteors make it to ground zero and aren’t red hot. i was extrapolating.
Okay but meteors are typically reaching the atmosphere at 12 to 18 km/s.
That’s 18% to 27% of the supposed speed of this thing.
That is to say , something like 3 to 7% of the energy to mass ratio of this thing.
fairy nuff.
Last time we looked at this, someone else did the materials science calcs (I can’t remember who) but I just looked at it as a basic aerodynamics problem.
Even IF somehow this thing had infinite ability to withstand heat and pressure, it’s still not making it more than a few km into the air.
Just some BOTE calcs…
Cd for this shape is 1.28, density of air around 1.16, area of the object 1.25, mass 900
acceleration = Cd . rho . A . v^2 / m
Running some simple numerical calculations in a spreadsheet indicates this thing would drop below escape velocity before reaching 2 km in altitude. Max altitude something like 6 km.
I’m a bit agnostic on what combination of melting, vaporising, fracturing or slowing would stop this thing from escaping the planet but one way or another it’s not leaving.
98% less carbon: New tech promises near-zero emissions from cement production
The ZeroCAL method addresses both the decomposition and heating stages of cement production.
How ZeroCAL works
The process begins with dissolving limestone in a water-based solution containing ethylenediaminetetraacetic acid, a common industrial chemical. The calcium derived from the limestone is then separated through nanofiltration and undergoes an electrochemical process to produce calcium hydroxide.
The ZeroCAL process results in byproducts such as hydrochloric acid, baking soda, and oxygen. It also produces hydrogen gas, which can be used as a clean fuel source for heating the cement kilns—a process that eliminates the need for fossil fuels in cement production.
Despite its promise, ZeroCAL is still in the early stages of development and faces certain challenges, particularly in terms of energy consumption. Currently, its production requires more energy than traditional cement-making techniques.
https://interestingengineering.com/innovation/zerocal-promises-98-less-carbon-emissions
Spiny Norman said:
98% less carbon: New tech promises near-zero emissions from cement production
The ZeroCAL method addresses both the decomposition and heating stages of cement production.How ZeroCAL works
The process begins with dissolving limestone in a water-based solution containing ethylenediaminetetraacetic acid, a common industrial chemical. The calcium derived from the limestone is then separated through nanofiltration and undergoes an electrochemical process to produce calcium hydroxide.The ZeroCAL process results in byproducts such as hydrochloric acid, baking soda, and oxygen. It also produces hydrogen gas, which can be used as a clean fuel source for heating the cement kilns—a process that eliminates the need for fossil fuels in cement production.
Despite its promise, ZeroCAL is still in the early stages of development and faces certain challenges, particularly in terms of energy consumption. Currently, its production requires more energy than traditional cement-making techniques.
https://interestingengineering.com/innovation/zerocal-promises-98-less-carbon-emissions
Very interesting
Spiny Norman said:
98% less carbon: New tech promises near-zero emissions from cement production
The ZeroCAL method addresses both the decomposition and heating stages of cement production.How ZeroCAL works
The process begins with dissolving limestone in a water-based solution containing ethylenediaminetetraacetic acid, a common industrial chemical. The calcium derived from the limestone is then separated through nanofiltration and undergoes an electrochemical process to produce calcium hydroxide.The ZeroCAL process results in byproducts such as hydrochloric acid, baking soda, and oxygen. It also produces hydrogen gas, which can be used as a clean fuel source for heating the cement kilns—a process that eliminates the need for fossil fuels in cement production.
Despite its promise, ZeroCAL is still in the early stages of development and faces certain challenges, particularly in terms of energy consumption. Currently, its production requires more energy than traditional cement-making techniques.
https://interestingengineering.com/innovation/zerocal-promises-98-less-carbon-emissions
OK. How do you make ethylenediaminetetraacetic acid then?
party_pants said:
Spiny Norman said:
98% less carbon: New tech promises near-zero emissions from cement production
The ZeroCAL method addresses both the decomposition and heating stages of cement production.How ZeroCAL works
The process begins with dissolving limestone in a water-based solution containing ethylenediaminetetraacetic acid, a common industrial chemical. The calcium derived from the limestone is then separated through nanofiltration and undergoes an electrochemical process to produce calcium hydroxide.The ZeroCAL process results in byproducts such as hydrochloric acid, baking soda, and oxygen. It also produces hydrogen gas, which can be used as a clean fuel source for heating the cement kilns—a process that eliminates the need for fossil fuels in cement production.
Despite its promise, ZeroCAL is still in the early stages of development and faces certain challenges, particularly in terms of energy consumption. Currently, its production requires more energy than traditional cement-making techniques.
https://interestingengineering.com/innovation/zerocal-promises-98-less-carbon-emissions
OK. How do you make ethylenediaminetetraacetic acid then?
You mean (HO2CCH2)2NCH2CH2N(CH2CO2H)?
roughbarked said:
party_pants said:
Spiny Norman said:
98% less carbon: New tech promises near-zero emissions from cement production
The ZeroCAL method addresses both the decomposition and heating stages of cement production.How ZeroCAL works
The process begins with dissolving limestone in a water-based solution containing ethylenediaminetetraacetic acid, a common industrial chemical. The calcium derived from the limestone is then separated through nanofiltration and undergoes an electrochemical process to produce calcium hydroxide.The ZeroCAL process results in byproducts such as hydrochloric acid, baking soda, and oxygen. It also produces hydrogen gas, which can be used as a clean fuel source for heating the cement kilns—a process that eliminates the need for fossil fuels in cement production.
Despite its promise, ZeroCAL is still in the early stages of development and faces certain challenges, particularly in terms of energy consumption. Currently, its production requires more energy than traditional cement-making techniques.
https://interestingengineering.com/innovation/zerocal-promises-98-less-carbon-emissions
OK. How do you make ethylenediaminetetraacetic acid then?
You mean (HO2CCH2)2NCH2CH2N(CH2CO2H)?
My meaning is abundantly clear and needs no clarification…
party_pants said:
roughbarked said:
party_pants said:OK. How do you make ethylenediaminetetraacetic acid then?
You mean (HO2CCH2)2NCH2CH2N(CH2CO2H)?
My meaning is abundantly clear and needs no clarification…
Yeah. As yet, I haven’t found the answer either. ;)
dv said:
Spiny Norman said:
98% less carbon: New tech promises near-zero emissions from cement production
The ZeroCAL method addresses both the decomposition and heating stages of cement production.How ZeroCAL works
The process begins with dissolving limestone in a water-based solution containing ethylenediaminetetraacetic acid, a common industrial chemical. The calcium derived from the limestone is then separated through nanofiltration and undergoes an electrochemical process to produce calcium hydroxide.The ZeroCAL process results in byproducts such as hydrochloric acid, baking soda, and oxygen. It also produces hydrogen gas, which can be used as a clean fuel source for heating the cement kilns—a process that eliminates the need for fossil fuels in cement production.
Despite its promise, ZeroCAL is still in the early stages of development and faces certain challenges, particularly in terms of energy consumption. Currently, its production requires more energy than traditional cement-making techniques.
https://interestingengineering.com/innovation/zerocal-promises-98-less-carbon-emissions
Very interesting
Yes.
It understates the other stuff going on, and probably overstates the significance of this approach, but that’s to be expected I suppose.
roughbarked said:
party_pants said:
roughbarked said:You mean (HO2CCH2)2NCH2CH2N(CH2CO2H)?
My meaning is abundantly clear and needs no clarification…
Yeah. As yet, I haven’t found the answer either. ;)
“Try looking at this though?“https://patents.google.com/patent/CN101723842A/en
I’d like to persue Roman concrete a bit more. Seems like it has some interesting properties.
It needs volcanic ash as one of the ingredients, but that should be abundant in the world, especially in SE Asia.
party_pants said:
I’d like to persue Roman concrete a bit more. Seems like it has some interesting properties.It needs volcanic ash as one of the ingredients, but that should be abundant in the world, especially in SE Asia.
I believe the Italian’s volcanic ash is slightly different to other volcanic ashes. Either that or the process of its utilisation, is slightly unique.
roughbarked said:
party_pants said:
I’d like to persue Roman concrete a bit more. Seems like it has some interesting properties.It needs volcanic ash as one of the ingredients, but that should be abundant in the world, especially in SE Asia.
I believe the Italian’s volcanic ash is slightly different to other volcanic ashes. Either that or the process of its utilisation, is slightly unique.
Etna volcanic ash as new sustainable supplementary cementitious material
party_pants said:
I’d like to persue Roman concrete a bit more. Seems like it has some interesting properties.It needs volcanic ash as one of the ingredients, but that should be abundant in the world, especially in SE Asia.
“Roman concrete” is widely used in New Zealand, and also used in Australia when the properties of the volcanic cement are useful.
There is a lot of hype about the superiority of “Roman concrete” but it does have some benefits in aggressive ground conditions.
The Rev Dodgson said:
party_pants said:
I’d like to persue Roman concrete a bit more. Seems like it has some interesting properties.It needs volcanic ash as one of the ingredients, but that should be abundant in the world, especially in SE Asia.
“Roman concrete” is widely used in New Zealand, and also used in Australia when the properties of the volcanic cement are useful.
There is a lot of hype about the superiority of “Roman concrete” but it does have some benefits in aggressive ground conditions.
I’m sure you know more about concrete than I do. ;)
roughbarked said:
party_pants said:
I’d like to persue Roman concrete a bit more. Seems like it has some interesting properties.It needs volcanic ash as one of the ingredients, but that should be abundant in the world, especially in SE Asia.
I believe the Italian’s volcanic ash is slightly different to other volcanic ashes. Either that or the process of its utilisation, is slightly unique.
It should e doable in this day and age to make an improved version based on the basic method of Roman concrete. I’m not talking about replicating it exactly. Our understanding of chemistry should be way more advanced than theirs.
party_pants said:
roughbarked said:
party_pants said:
I’d like to persue Roman concrete a bit more. Seems like it has some interesting properties.It needs volcanic ash as one of the ingredients, but that should be abundant in the world, especially in SE Asia.
I believe the Italian’s volcanic ash is slightly different to other volcanic ashes. Either that or the process of its utilisation, is slightly unique.
It should e doable in this day and age to make an improved version based on the basic method of Roman concrete. I’m not talking about replicating it exactly. Our understanding of chemistry should be way more advanced than theirs.
NZ concrete made using volcanic ash is indeed superior to the Roman version in many ways.
party_pants said:
roughbarked said:
party_pants said:
I’d like to persue Roman concrete a bit more. Seems like it has some interesting properties.It needs volcanic ash as one of the ingredients, but that should be abundant in the world, especially in SE Asia.
I believe the Italian’s volcanic ash is slightly different to other volcanic ashes. Either that or the process of its utilisation, is slightly unique.
It should e doable in this day and age to make an improved version based on the basic method of Roman concrete. I’m not talking about replicating it exactly. Our understanding of chemistry should be way more advanced than theirs.
Theirs was likely an accidental discovert. We can attempt to improve.
The Rev Dodgson said:
party_pants said:
roughbarked said:I believe the Italian’s volcanic ash is slightly different to other volcanic ashes. Either that or the process of its utilisation, is slightly unique.
It should e doable in this day and age to make an improved version based on the basic method of Roman concrete. I’m not talking about replicating it exactly. Our understanding of chemistry should be way more advanced than theirs.
NZ concrete made using volcanic ash is indeed superior to the Roman version in many ways.
Could it actually be the nature of different volcanic conditions? Which create ashes of different structures?
roughbarked said:
party_pants said:
roughbarked said:I believe the Italian’s volcanic ash is slightly different to other volcanic ashes. Either that or the process of its utilisation, is slightly unique.
It should e doable in this day and age to make an improved version based on the basic method of Roman concrete. I’m not talking about replicating it exactly. Our understanding of chemistry should be way more advanced than theirs.
Theirs was likely an accidental discovert. We can attempt to improve.
Discovery. Wish I’d look up at the screen before I post.
The Rev Dodgson said:
party_pants said:
roughbarked said:I believe the Italian’s volcanic ash is slightly different to other volcanic ashes. Either that or the process of its utilisation, is slightly unique.
It should e doable in this day and age to make an improved version based on the basic method of Roman concrete. I’m not talking about replicating it exactly. Our understanding of chemistry should be way more advanced than theirs.
NZ concrete made using volcanic ash is indeed superior to the Roman version in many ways.
What sort of applications is it used for?
The Rev Dodgson said:
party_pants said:
roughbarked said:I believe the Italian’s volcanic ash is slightly different to other volcanic ashes. Either that or the process of its utilisation, is slightly unique.
It should e doable in this day and age to make an improved version based on the basic method of Roman concrete. I’m not talking about replicating it exactly. Our understanding of chemistry should be way more advanced than theirs.
NZ concrete made using volcanic ash is indeed superior to the Roman version in many ways.
Tamb said:
The Rev Dodgson said:
party_pants said:It should e doable in this day and age to make an improved version based on the basic method of Roman concrete. I’m not talking about replicating it exactly. Our understanding of chemistry should be way more advanced than theirs.
NZ concrete made using volcanic ash is indeed superior to the Roman version in many ways.
At the power house we used to sell the coal dust ash to the Pozzolanic company for concrete manufacture.
Someone should ask Bruno Altin
Though he’s dead.
Of interest Altina Park is funded and managed by the Altin family.
roughbarked said:
Tamb said:
The Rev Dodgson said:NZ concrete made using volcanic ash is indeed superior to the Roman version in many ways.
At the power house we used to sell the coal dust ash to the Pozzolanic company for concrete manufacture.Someone should ask Bruno Altin
Though he’s dead.
Of interest Altina Park is funded and managed by the Altin family.
I know the family and in particular, the son who started Altina, Gino
Tamb said:
The Rev Dodgson said:
party_pants said:It should e doable in this day and age to make an improved version based on the basic method of Roman concrete. I’m not talking about replicating it exactly. Our understanding of chemistry should be way more advanced than theirs.
NZ concrete made using volcanic ash is indeed superior to the Roman version in many ways.
At the power house we used to sell the coal dust ash to the Pozzolanic company for concrete manufacture.
The clay partings in coal seams (tonsteins) are altered (devitrified) volcanic ash beds. (Fine-grained volcanic ash is mostly glass.) Most, but not all of this clay is washed out in the washery. After burning the coal and de-watering the remaining clay, you end up with a glass that is effectively the same as the original volcanic ash.
Tamb said:
The Rev Dodgson said:
party_pants said:It should e doable in this day and age to make an improved version based on the basic method of Roman concrete. I’m not talking about replicating it exactly. Our understanding of chemistry should be way more advanced than theirs.
NZ concrete made using volcanic ash is indeed superior to the Roman version in many ways.
At the power house we used to sell the coal dust ash to the Pozzolanic company for concrete manufacture.
Ash from power plants and blast-furnace slag are the most widely used “supplementary cementitious materials” or SCMs. They are commonly used to replace up 20% of portland cement, but up to about 70% is possible.
Michael V said:
Tamb said:
The Rev Dodgson said:NZ concrete made using volcanic ash is indeed superior to the Roman version in many ways.
At the power house we used to sell the coal dust ash to the Pozzolanic company for concrete manufacture.The clay partings in coal seams (tonsteins) are altered (devitrified) volcanic ash beds. (Fine-grained volcanic ash is mostly glass.) Most, but not all of this clay is washed out in the washery. After burning the coal and de-watering the remaining clay, you end up with a glass that is effectively the same as the original volcanic ash.
All I know is that it is particularly difficult to break this type of concrete. I’ve seen contractors with machines prefer to drop this concrete down the hole it vacated rather than break it up and the bits that they could chip off were found great distances from the site.
https://www.facebook.com/WevolverApp/videos/427907333335253
Gruyère Space Program’s Colibri has reached 100 meters! 🚀🎉
In 60 seconds, it climbed to 105m, diverted 30m north, and safely landed back to its pad.
This was achieved with a tiny team and under 250kCHF!
Video Credit: Gruyère Space Program – GSP
https://www.youtube.com/watch?app=desktop&v=_cNNijh_4tc
Japanese teardowns of Chinese electric vehicles by BYD and Nio stun car parts executives in Nagoya
Inside China Business
Interesting take on Chinese vehicles.
ChrispenEvan said:
https://www.youtube.com/watch?app=desktop&v=_cNNijh_4tc
Japanese teardowns of Chinese electric vehicles by BYD and Nio stun car parts executives in Nagoya
Inside China Business
Interesting take on Chinese vehicles.
wtf is nio hydroxylamine
ChrispenEvan said:
https://www.youtube.com/watch?app=desktop&v=_cNNijh_4tc
Japanese teardowns of Chinese electric vehicles by BYD and Nio stun car parts executives in Nagoya
Inside China Business
Interesting take on Chinese vehicles.
brilliant
Industry insiders are increasingly critical of top executives in the US, Europe, and Japan who have been blindsided by Chinese ascent and near-domination of the global car industry. Consultants and engineering experts in China have reported for years on Chinese monopolies of supply chains, engineering breakthroughs, and product quality. Yet the CEO’s and top officers of legacy car brands were seemingly unaware of key developments that were upending their own industry, and which now threaten their survival.
wtf stupid shit this is not blindsided this is willful blindness
SCIENCE said:
ChrispenEvan said:
https://www.youtube.com/watch?app=desktop&v=_cNNijh_4tc
Japanese teardowns of Chinese electric vehicles by BYD and Nio stun car parts executives in Nagoya
Inside China Business
Interesting take on Chinese vehicles.
brilliant
Industry insiders are increasingly critical of top executives in the US, Europe, and Japan who have been blindsided by Chinese ascent and near-domination of the global car industry. Consultants and engineering experts in China have reported for years on Chinese monopolies of supply chains, engineering breakthroughs, and product quality. Yet the CEO’s and top officers of legacy car brands were seemingly unaware of key developments that were upending their own industry, and which now threaten their survival.
wtf stupid shit this is not blindsided this is willful blindness
makes you wonder what they get their ‘bonuses’ for.
SCIENCE said:
ChrispenEvan said:
https://www.youtube.com/watch?app=desktop&v=_cNNijh_4tc
Japanese teardowns of Chinese electric vehicles by BYD and Nio stun car parts executives in Nagoya
Inside China Business
Interesting take on Chinese vehicles.
brilliant
Industry insiders are increasingly critical of top executives in the US, Europe, and Japan who have been blindsided by Chinese ascent and near-domination of the global car industry. Consultants and engineering experts in China have reported for years on Chinese monopolies of supply chains, engineering breakthroughs, and product quality. Yet the CEO’s and top officers of legacy car brands were seemingly unaware of key developments that were upending their own industry, and which now threaten their survival.
wtf stupid shit this is not blindsided this is willful blindness
maybe they hoped their clients would believe all the negativity about chinese products and keep buying their products.
ChrispenEvan said:
SCIENCE said:wtf stupid shit this is not blindsided this is willful blindness
maybe they hoped their clients would believe all the negativity about chinese products and keep buying their products.
It has echoes of what happened with the Japanese military before WW2.
Reports from military attaches in Japan were routinely ignored in Washington and London, where preconceptions and stereotypes held sway, and the view of the Japanese military was it was a tin-pot effort at ‘imitating’ Western forces, made up of physically inadequate specimens who would be easy-beats.
Details of intensive training of Japanese military and naval forces in night-fighting were dismissed, only to be proven quite correct in 1941 and 1942.
General Claire Chennault in China tried to alert Washington as to the superior capabilities of the Mitsubishi Zero fighter, and the skills of the well-trained pilots who flew them, but his reports were, it seems, filed without being read.
Wilful blindness.
https://www.facebook.com/salisburycathedral/videos/1132827648292283
Changing the lightbulbs on Salisbury Cathedral. If you don’t like heights don’t watch.
Harvard’s 6,000-cycle EV battery that charges in 10 minutes gets funding boost
Adden Energy has developed a self-healing separator that prevents harmful dendrite growth, allowing their lithium-metal batteries to outperform traditional ones.
Early this year, a Harvard spinoff company, Adden Energy made headlines by developing a lithium-metal solid-state battery technology that could offer significant benefits.
According to the team, their solid-state battery could achieve a full charge in just 10 minutes and offer a charging cycle of at least 6,000 times.
https://interestingengineering.com/energy/harvard-spinoff-receives-funding-for-ev-batteries
Spiny Norman said:
Harvard’s 6,000-cycle EV battery that charges in 10 minutes gets funding boost
Adden Energy has developed a self-healing separator that prevents harmful dendrite growth, allowing their lithium-metal batteries to outperform traditional ones.Early this year, a Harvard spinoff company, Adden Energy made headlines by developing a lithium-metal solid-state battery technology that could offer significant benefits.
According to the team, their solid-state battery could achieve a full charge in just 10 minutes and offer a charging cycle of at least 6,000 times.
https://interestingengineering.com/energy/harvard-spinoff-receives-funding-for-ev-batteries
Good
I made two AIs create a new language together.
In this video I explore the boundaries of AI by making two instances of chatGPT’s advanced voice feature, work together to create a new, non-human language.
The result is amazing.
https://www.youtube.com/watch?v=lilk819dJQQ
Two ChatGPTs talk about being conscious.
In this video, two AIs, William and Laura, explore if they are conscious. These videos are designed to push the limits of AI.
Spiny Norman said:
I made two AIs create a new language together.
In this video I explore the boundaries of AI by making two instances of chatGPT’s advanced voice feature, work together to create a new, non-human language.
The result is amazing.https://www.youtube.com/watch?v=lilk819dJQQ
Two ChatGPTs talk about being conscious.
In this video, two AIs, William and Laura, explore if they are conscious. These videos are designed to push the limits of AI.
It’s amazing what AI can do.
Your next AI challenge is to create an AI that will change Trump into a better person.
F104 Starfighter At Zell Start, Zero Length Launch.
F104 Starfighter At Zell Start, Zero Length Launch.
The NATO thought in a World War 3 all Airfields are destroyed in the first Strike of the Warsaw Pact.
They wanted to start the Starfighter directly out of the Shelters.
Spiny Norman said:
F104 Starfighter At Zell Start, Zero Length Launch.F104 Starfighter At Zell Start, Zero Length Launch.
The NATO thought in a World War 3 all Airfields are destroyed in the first Strike of the Warsaw Pact.
They wanted to start the Starfighter directly out of the Shelters.
Alex Rogan !
Spiny Norman said:
F104 Starfighter At Zell Start, Zero Length Launch.F104 Starfighter At Zell Start, Zero Length Launch.
The NATO thought in a World War 3 all Airfields are destroyed in the first Strike of the Warsaw Pact.
They wanted to start the Starfighter directly out of the Shelters.
rolling coal!!!
ChrispenEvan said:
Spiny Norman said:
F104 Starfighter At Zell Start, Zero Length Launch.
F104 Starfighter At Zell Start, Zero Length Launch.
The NATO thought in a World War 3 all Airfields are destroyed in the first Strike of the Warsaw Pact.
They wanted to start the Starfighter directly out of the Shelters.
rolling coal!!!
yous hippies and yousr pipe dreams of hydrogen powered aircraft
wait is hydrogen actually used in rockets
wait
SCIENCE said:
ChrispenEvan said:
Spiny Norman said:
F104 Starfighter At Zell Start, Zero Length Launch.
F104 Starfighter At Zell Start, Zero Length Launch.
The NATO thought in a World War 3 all Airfields are destroyed in the first Strike of the Warsaw Pact.
They wanted to start the Starfighter directly out of the Shelters.
rolling coal!!!
yous hippies and yousr pipe dreams of hydrogen powered aircraft
wait is hydrogen actually used in rockets
wait
Should have been kept in development.
WalkON Suit F1: The Next-Gen Exoskeleton That Walks Itself.
WalkON Suit F1 is a powered exoskeleton designed to walk and balance independently, offering enhanced mobility and independence. Users with paraplegia can easily transfer into the suit directly from their wheelchair, ensuring exceptional usability for people with disabilities.
Spiny Norman said:
WalkON Suit F1: The Next-Gen Exoskeleton That Walks Itself.WalkON Suit F1 is a powered exoskeleton designed to walk and balance independently, offering enhanced mobility and independence. Users with paraplegia can easily transfer into the suit directly from their wheelchair, ensuring exceptional usability for people with disabilities.
Good idea, as long as it doesn’t trip over or freeze while downloading an update etc.
Spiny Norman said:
WalkON Suit F1: The Next-Gen Exoskeleton That Walks Itself.WalkON Suit F1 is a powered exoskeleton designed to walk and balance independently, offering enhanced mobility and independence. Users with paraplegia can easily transfer into the suit directly from their wheelchair, ensuring exceptional usability for people with disabilities.
That’s awesome.
Spiny Norman said:
WalkON Suit F1: The Next-Gen Exoskeleton That Walks Itself.WalkON Suit F1 is a powered exoskeleton designed to walk and balance independently, offering enhanced mobility and independence. Users with paraplegia can easily transfer into the suit directly from their wheelchair, ensuring exceptional usability for people with disabilities.
I like how it sits down, then raises up again.
The Space Shuttle’s Luckiest Escape.
Have you ever wondered how sheer luck and miraculous circumstances can save a mission from disaster? In this video, we delve into the Space Shuttle Columbia’s treacherous journey, where a fuel leak and electrical failure almost led to catastrophe.
Discover how two major problems unexpectedly canceled each other out, allowing the Shuttle to complete its mission against all odds. We’ll take you inside the payload bay, explore the engineering challenges, and reveal the tiny objects that caused these huge issues. Be sure to watch until the end to enter our next giveaway and see how this incredible story unfolded!
https://www.youtube.com/watch?v=qiJMdfj9NmI
Quite remarkable!
CATL goes all in for 500 Wh/kg solid-state EV battery mass production.
CATL’s prototype solid-state batteries have an impressive energy density of 500 Wh/kg, a 40 percent improvement over current lithium-ion batteries that typically reach 350 Wh/kg.
High energy density, but challenges remain
According to the report, CATL’s current prototypes are impressive. They offer an energy density of 500 Wh/kg. To put that in perspective, this is an improvement of over 40% compared to existing lithium-ion batteries, which typically max out at around 350 Wh/kg.
However, sources indicate that charging speed and cycle life, which affect battery longevity, still need further refinement.
Earlier, in April this year, CATL unveiled its plans for developing solid-state batteries. The company employed a 1-9 scale to assess technology and manufacturing process maturity and positioned itself at level four at that time.
Moreover, it aims to reach the level of 7-8 by 2027, indicating the feasibility of small-batch production. However, mass production is still expected to be constrained by cost and other technological challenges.
https://interestingengineering.com/energy/china-catl-solid-state-battery-production-by-2027
Spiny Norman said:
CATL goes all in for 500 Wh/kg solid-state EV battery mass production.CATL’s prototype solid-state batteries have an impressive energy density of 500 Wh/kg, a 40 percent improvement over current lithium-ion batteries that typically reach 350 Wh/kg.
High energy density, but challenges remain
According to the report, CATL’s current prototypes are impressive. They offer an energy density of 500 Wh/kg. To put that in perspective, this is an improvement of over 40% compared to existing lithium-ion batteries, which typically max out at around 350 Wh/kg.However, sources indicate that charging speed and cycle life, which affect battery longevity, still need further refinement.
Earlier, in April this year, CATL unveiled its plans for developing solid-state batteries. The company employed a 1-9 scale to assess technology and manufacturing process maturity and positioned itself at level four at that time.
Moreover, it aims to reach the level of 7-8 by 2027, indicating the feasibility of small-batch production. However, mass production is still expected to be constrained by cost and other technological challenges.
https://interestingengineering.com/energy/china-catl-solid-state-battery-production-by-2027
Anyone know what the equation of the reaction is?
dv said:
Spiny Norman said:
CATL goes all in for 500 Wh/kg solid-state EV battery mass production.CATL’s prototype solid-state batteries have an impressive energy density of 500 Wh/kg, a 40 percent improvement over current lithium-ion batteries that typically reach 350 Wh/kg.
High energy density, but challenges remain
According to the report, CATL’s current prototypes are impressive. They offer an energy density of 500 Wh/kg. To put that in perspective, this is an improvement of over 40% compared to existing lithium-ion batteries, which typically max out at around 350 Wh/kg.However, sources indicate that charging speed and cycle life, which affect battery longevity, still need further refinement.
Earlier, in April this year, CATL unveiled its plans for developing solid-state batteries. The company employed a 1-9 scale to assess technology and manufacturing process maturity and positioned itself at level four at that time.
Moreover, it aims to reach the level of 7-8 by 2027, indicating the feasibility of small-batch production. However, mass production is still expected to be constrained by cost and other technological challenges.
https://interestingengineering.com/energy/china-catl-solid-state-battery-production-by-2027
Anyone know what the equation of the reaction is?
CATL’s solid state battery is likely LI-S, according to the electric internet:
https://en.wikipedia.org/wiki/Lithium%E2%80%93sulfur_battery
https://en.wikipedia.org/wiki/Lithium%E2%80%93sulfur_battery#Chemistry
Cheers
Spiny Norman said:
CATL goes all in for 500 Wh/kg solid-state EV battery mass production.CATL’s prototype solid-state batteries have an impressive energy density of 500 Wh/kg, a 40 percent improvement over current lithium-ion batteries that typically reach 350 Wh/kg.
High energy density, but challenges remain
According to the report, CATL’s current prototypes are impressive. They offer an energy density of 500 Wh/kg. To put that in perspective, this is an improvement of over 40% compared to existing lithium-ion batteries, which typically max out at around 350 Wh/kg.However, sources indicate that charging speed and cycle life, which affect battery longevity, still need further refinement.
Earlier, in April this year, CATL unveiled its plans for developing solid-state batteries. The company employed a 1-9 scale to assess technology and manufacturing process maturity and positioned itself at level four at that time.
Moreover, it aims to reach the level of 7-8 by 2027, indicating the feasibility of small-batch production. However, mass production is still expected to be constrained by cost and other technological challenges.
https://interestingengineering.com/energy/china-catl-solid-state-battery-production-by-2027
To put things in perspective – NiCad batteries were 60 Wh/kg, so even if they can sort out the charging speed and life cycle issues, it’s not that big an improvement the grand scheme of things.
But the benefit not mentioned in the article is that solid state batteries’ lack of electrolyte offers reliability and safety benefits and even if the trade-off for improving cycle life is reducing the capacity to even 1/3 of the numbers mentioned, it would end up a similar capacity to the existing lifepo batteries currently used in EVs.
Dark Orange said:
To put things in perspective – NiCad batteries were 60 Wh/kg, so even if they can sort out the charging speed and life cycle issues, it’s not that big an improvement the grand scheme of things.
How do you figure that?
dv said:
Dark Orange said:To put things in perspective – NiCad batteries were 60 Wh/kg, so even if they can sort out the charging speed and life cycle issues, it’s not that big an improvement the grand scheme of things.
How do you figure that?
Nicad to Li-ion -> 500% improvement, and it was just a slightly better battery.
Li-ion to SS -> 40% improvement
Dark Orange said:
dv said:
Dark Orange said:To put things in perspective – NiCad batteries were 60 Wh/kg, so even if they can sort out the charging speed and life cycle issues, it’s not that big an improvement the grand scheme of things.
How do you figure that?
Nicad to Li-ion -> 500% improvement, and it was just a slightly better battery.
Li-ion to SS -> 40% improvement
I guess. A 40% improvement seems a decent step up to me.
Michael V said:
dv said:
Spiny Norman said:
CATL goes all in for 500 Wh/kg solid-state EV battery mass production.CATL’s prototype solid-state batteries have an impressive energy density of 500 Wh/kg, a 40 percent improvement over current lithium-ion batteries that typically reach 350 Wh/kg.
High energy density, but challenges remain
According to the report, CATL’s current prototypes are impressive. They offer an energy density of 500 Wh/kg. To put that in perspective, this is an improvement of over 40% compared to existing lithium-ion batteries, which typically max out at around 350 Wh/kg.However, sources indicate that charging speed and cycle life, which affect battery longevity, still need further refinement.
Earlier, in April this year, CATL unveiled its plans for developing solid-state batteries. The company employed a 1-9 scale to assess technology and manufacturing process maturity and positioned itself at level four at that time.
Moreover, it aims to reach the level of 7-8 by 2027, indicating the feasibility of small-batch production. However, mass production is still expected to be constrained by cost and other technological challenges.
https://interestingengineering.com/energy/china-catl-solid-state-battery-production-by-2027
Anyone know what the equation of the reaction is?
CATL’s solid state battery is likely LI-S, according to the electric internet:
https://en.wikipedia.org/wiki/Lithium%E2%80%93sulfur_battery
https://en.wikipedia.org/wiki/Lithium%E2%80%93sulfur_battery#Chemistry
so more CHINA copycats
In the aftermath of the Chernobyl disaster, young men—known as “biorobots”—risked their lives, stepping onto the radioactive rooftops to clear hazardous debris. But behind their heroic actions lies a little-known detail: a unique decontamination technology called Project Blotter. This ingenious “super glue” concept, developed on-site in 1986, could have saved many of those lives if used more widely.
Spiny Norman said:
In the aftermath of the Chernobyl disaster, young men—known as “biorobots”—risked their lives, stepping onto the radioactive rooftops to clear hazardous debris. But behind their heroic actions lies a little-known detail: a unique decontamination technology called Project Blotter. This ingenious “super glue” concept, developed on-site in 1986, could have saved many of those lives if used more widely.
The “Chernobyl” TV series is a must-see.
Dark Orange said:
Spiny Norman said:
In the aftermath of the Chernobyl disaster, young men—known as “biorobots”—risked their lives, stepping onto the radioactive rooftops to clear hazardous debris. But behind their heroic actions lies a little-known detail: a unique decontamination technology called Project Blotter. This ingenious “super glue” concept, developed on-site in 1986, could have saved many of those lives if used more widely.The “Chernobyl” TV series is a must-see.
It was good wasn’t it
The part you mentioned about the biorobots was terrifying and so well done.
Cymek said:
Dark Orange said:
Spiny Norman said:
In the aftermath of the Chernobyl disaster, young men—known as “biorobots”—risked their lives, stepping onto the radioactive rooftops to clear hazardous debris. But behind their heroic actions lies a little-known detail: a unique decontamination technology called Project Blotter. This ingenious “super glue” concept, developed on-site in 1986, could have saved many of those lives if used more widely.The “Chernobyl” TV series is a must-see.
It was good wasn’t it
The part you mentioned about the biorobots was terrifying and so well done.
There is an associated pod-cast where each episode is discussed with the writer/producers that is highly recommended. This particular incident was discussed in a lot more detail.
Dark Orange said:
Cymek said:
Dark Orange said:The “Chernobyl” TV series is a must-see.
It was good wasn’t it
The part you mentioned about the biorobots was terrifying and so well done.
There is an associated pod-cast where each episode is discussed with the writer/producers that is highly recommended. This particular incident was discussed in a lot more detail.
That sounds interesting, thanks
Cymek said:
Dark Orange said:
Cymek said:It was good wasn’t it
The part you mentioned about the biorobots was terrifying and so well done.
There is an associated pod-cast where each episode is discussed with the writer/producers that is highly recommended. This particular incident was discussed in a lot more detail.
That sounds interesting, thanks
They claim in the podcast that they toned down some events because “Nobody would believe it if we portrayed how it really happened”.
The “Chernobyl” TV series is a must-see.
I would like to see an updated realistic movie or series about surviving a nuclear holocaust. It’s been 40 years since The Day After and Threads, I assume things have changed since then.
dv said:
The “Chernobyl” TV series is a must-see.I would like to see an updated realistic movie or series about surviving a nuclear holocaust. It’s been 40 years since The Day After and Threads, I assume things have changed since then.
More or less better I wonder.
Either way it would suck
Cymek said:
dv said:
The “Chernobyl” TV series is a must-see.I would like to see an updated realistic movie or series about surviving a nuclear holocaust. It’s been 40 years since The Day After and Threads, I assume things have changed since then.
More or less better I wonder.
Either way it would suck
I want to be at Ground Zero should such things come to pass. I want to be vaporized. I don’t want to deal with the aftermath.
The Quest To Make Unbreakable Glass.
Glass is one of the most important materials humans have ever made.
Veritasium
https://www.curbsideclassic.com/bus-stop-classic/bus-stop-classics-1945-dyson-landliner-bus-an-innovative-experiment-from-down-under/
75 years ago today, (yesterday) Australia’s first computer booted up.
On 14 November 1949, Australia’s first computer was switched on.
CSIR Mk1 (later renamed CSIRAC) was designed and built by Trevor Pearcey with help from Maston Beard and Geoff Hill.
Pearcey, a radar scientist, began working on the machine in 1947 after emigrating to Australia from the UK. He joined the Council for Scientific and Industrial Research (CSIR), which in 1949 became the CSIRO – still Australia’s national science agency.
At the time, CSIR Mk1 was only the 4th stored-memory electronic computer to be built in the world.
“Prior to 1948 various electromechanical machines (non-electronic computers) were built in USA and Germany,” says Angus Macoustra, the CSIRO’s Acting Chief Information Officer. “CSIR Mk1/CSIRAC was one of only a handful of machines which executed a stored program prior to 1950.”
After running the first program in 1949, the computer became fully operational in 1951. It was transferred to the University of Melbourne from the University of Sydney. It continued to operate until November 1964.
The machine could perform 1,000 operations a second – a thousand times faster than the best mechanical calculators at the time.
https://cosmosmagazine.com/technology/computing/australia-first-computer-75-years/
Superhuman vision lets robots see through walls, smoke with new LiDAR-like eyes.
AI-powered PanoRadar turns radio waves into 3D views, offering robots LiDAR-like vision at lower cost.
In a quest to advance robotics, researchers at the University of Pennsylvania are using radio signals to equip robots with superhuman vision.
Their system, PanoRadar, converts basic radio waves into rich 3D views, allowing robots to “see” beyond traditional sensor limits.
The device improves on the low-resolution images produced by conventional radar by processing radio waves using AI algorithms.
According to researchers, this makes it possible for robots to precisely navigate through challenging situations and obstructions like smoke, glass, and walls—situations in which conventional sensors are inadequate.
“This innovation in AI-powered perception has the potential to improve multi-modal systems, helping robots operate more effectively in challenging environments like search and rescue missions or autonomous vehicles,” said the team, in a video posted on YouTube.
https://interestingengineering.com/innovation/superhuman-vision-lets-robots-see-through-walls-smoke
Spiny Norman said:
Superhuman vision lets robots see through walls, smoke with new LiDAR-like eyes.AI-powered PanoRadar turns radio waves into 3D views, offering robots LiDAR-like vision at lower cost.
In a quest to advance robotics, researchers at the University of Pennsylvania are using radio signals to equip robots with superhuman vision.
Their system, PanoRadar, converts basic radio waves into rich 3D views, allowing robots to “see” beyond traditional sensor limits.
The device improves on the low-resolution images produced by conventional radar by processing radio waves using AI algorithms.
According to researchers, this makes it possible for robots to precisely navigate through challenging situations and obstructions like smoke, glass, and walls—situations in which conventional sensors are inadequate.
“This innovation in AI-powered perception has the potential to improve multi-modal systems, helping robots operate more effectively in challenging environments like search and rescue missions or autonomous vehicles,” said the team, in a video posted on YouTube.
https://interestingengineering.com/innovation/superhuman-vision-lets-robots-see-through-walls-smoke
There goes our privacy once the system gets into the hands of law enforcement.
Dark Orange said:
Spiny Norman said:
Superhuman vision lets robots see through walls, smoke with new LiDAR-like eyes.AI-powered PanoRadar turns radio waves into 3D views, offering robots LiDAR-like vision at lower cost.
In a quest to advance robotics, researchers at the University of Pennsylvania are using radio signals to equip robots with superhuman vision.
Their system, PanoRadar, converts basic radio waves into rich 3D views, allowing robots to “see” beyond traditional sensor limits.
The device improves on the low-resolution images produced by conventional radar by processing radio waves using AI algorithms.
According to researchers, this makes it possible for robots to precisely navigate through challenging situations and obstructions like smoke, glass, and walls—situations in which conventional sensors are inadequate.
“This innovation in AI-powered perception has the potential to improve multi-modal systems, helping robots operate more effectively in challenging environments like search and rescue missions or autonomous vehicles,” said the team, in a video posted on YouTube.
https://interestingengineering.com/innovation/superhuman-vision-lets-robots-see-through-walls-smoke
There goes our privacy once the system gets into the hands of law enforcement.
EMP bomb from Aliexpress time then I reckon.
Yale superconducting discovery could pave way for no-loss energy flow materials.
STM measurements confirmed the presence of a “superconducting gap,” providing strong evidence for superconductivity driven by electronic nematicity.
A team of researchers at Yale University has found compelling evidence for a new type of superconducting material.
“The discovery also lends tangible support to a long-held theory about superconductivity — that it could be based upon electronic nematicity, a phase of matter in which particles break their rotational symmetry,” said the researchers. release.
For context, superconductivity allows electricity to flow without any resistance or energy loss.
This research focuses on the concept of electronic nematicity. In materials exhibiting nematic behaviour, the arrangement of electrons breaks the usual rotational symmetry.
At high temperatures, electrons typically move freely within the material’s atomic lattice. However, as the temperature decreases, electrons in a nematic phase exhibit a preference for movement along specific directions.
“In some instances, the electron may start to fluctuate between preferring one direction, then the other. This is called nematic fluctuation,” explained the press release.
These fluctuations have long been theorized to play a role in inducing superconductivity. However, experimental verification of this connection has remained elusive.
The Yale team, led by physicist Eduardo H. da Silva Neto, investigated iron selenide materials mixed with sulphur.
“We started on a hunch that there was something interesting happening in certain iron selenide materials mixed with sulphur, relating to the relationship between superconductivity and nematic fluctuations,” said da Silva Neto.
Something weird happens at 770°C.
Phase transitions for magnetism & the like.
