Date: 7/08/2023 22:41:01
From: Arts
ID: 2062716
Subject: Overture

So I got a bit lost in the aircraft conversation earlier (or yesterday – I’ve lost track of time). but it led me to this information:

there is talk of releasing a new supersonic jet aircraft called Overture, by Boom.

First flight set to happen in 2027

for your viewing pleasure..

https://boomsupersonic.com/overture

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Date: 8/08/2023 00:02:55
From: dv
ID: 2062718
Subject: re: Overture

We’ll see

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Date: 8/08/2023 03:07:24
From: SCIENCE
ID: 2062725
Subject: re: Overture

Should help with global warming, just make sure it pumps out some SO2.

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Date: 8/08/2023 08:28:30
From: Spiny Norman
ID: 2062745
Subject: re: Overture

Arts said:


So I got a bit lost in the aircraft conversation earlier (or yesterday – I’ve lost track of time). but it led me to this information:

there is talk of releasing a new supersonic jet aircraft called Overture, by Boom.

First flight set to happen in 2027

for your viewing pleasure..

https://boomsupersonic.com/overture

I hope they do well with it. It’s quite a difficult job to reduce the overpressure wave on the ground.
There’s also designing the engine inlets, which is also quite difficult as they have to work well from zero speed up to the highest Mach number. As the inlet goes supersonic, they have to create small shock waves inside the inlet, as that reduces the speed of the inlet air back to subsonic as the jet engines have to breath subsonic air only. The other positive effect of slowing the inlet air down is that its pressure increases, thus allowing for more power from the engines.

Perhaps the most complex engine inlet system was that of the Lockheed SR-71/A-12/YF-12, with the Pratt & Whitney J-58. At high Mach numbers the engine made only about 1/6th of the total thrust, with the afterburner & inlet making the rest. It worked partly as ramjet when at the cruising speed of M 3.2

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Date: 8/08/2023 21:10:04
From: wookiemeister
ID: 2063038
Subject: re: Overture

Just start building concorde again. All the engineering has already been worked out.

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Date: 8/08/2023 21:40:27
From: party_pants
ID: 2063055
Subject: re: Overture

wookiemeister said:


Just start building concorde again. All the engineering has already been worked out.

The whole point of the exercise is to design a supersonic aircraft with minimal sonic boom. Concorde does not have this feature. The sonic boom is what killed Concorde commercially and made it a failed project.

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Date: 9/08/2023 07:21:45
From: Spiny Norman
ID: 2063127
Subject: re: Overture

party_pants said:


wookiemeister said:

Just start building concorde again. All the engineering has already been worked out.

The whole point of the exercise is to design a supersonic aircraft with minimal sonic boom. Concorde does not have this feature. The sonic boom is what killed Concorde commercially and made it a failed project.

That, and it was very expensive to maintain. And that was also because there were only 14 of them flying, not the hundreds that were ordered at the start of the programme. And also because Aerospatiale ceased making spares for them. The French Concorde ceased flying a couple of months before the British ones for those reasons.

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Date: 9/08/2023 07:29:30
From: roughbarked
ID: 2063128
Subject: re: Overture

Spiny Norman said:


party_pants said:

wookiemeister said:

Just start building concorde again. All the engineering has already been worked out.

The whole point of the exercise is to design a supersonic aircraft with minimal sonic boom. Concorde does not have this feature. The sonic boom is what killed Concorde commercially and made it a failed project.

That, and it was very expensive to maintain. And that was also because there were only 14 of them flying, not the hundreds that were ordered at the start of the programme. And also because Aerospatiale ceased making spares for them. The French Concorde ceased flying a couple of months before the British ones for those reasons.

That last crash and burn on takeoff was the icing on the cake.

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Date: 9/08/2023 12:07:20
From: mollwollfumble
ID: 2063210
Subject: re: Overture

Spiny Norman said:


Arts said:

So I got a bit lost in the aircraft conversation earlier (or yesterday – I’ve lost track of time). but it led me to this information:

there is talk of releasing a new supersonic jet aircraft called Overture, by Boom.

First flight set to happen in 2027

for your viewing pleasure..

https://boomsupersonic.com/overture

I hope they do well with it. It’s quite a difficult job to reduce the overpressure wave on the ground.
There’s also designing the engine inlets, which is also quite difficult as they have to work well from zero speed up to the highest Mach number. As the inlet goes supersonic, they have to create small shock waves inside the inlet, as that reduces the speed of the inlet air back to subsonic as the jet engines have to breath subsonic air only. The other positive effect of slowing the inlet air down is that its pressure increases, thus allowing for more power from the engines.

Perhaps the most complex engine inlet system was that of the Lockheed SR-71/A-12/YF-12, with the Pratt & Whitney J-58. At high Mach numbers the engine made only about 1/6th of the total thrust, with the afterburner & inlet making the rest. It worked partly as ramjet when at the cruising speed of M 3.2


I love that engine.

PS you only need ramjet to go high supersonic, scramjet is overkill.

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