Helicopters landing in rough seas

Would a landing platform on a large gyroscope work?

Tau.Neutrino said:

Helicopters landing in rough seas

Would a landing platform on a large gyroscope work?

Probably not.

You’re going to need a whole lot of machinery to keep the landing platform level. A lot of hydraulic rams, not to mention the equipment that provides the hydraulic pressure to activate them, and then you’ve got the landing platform itself, which would be another deck, above the existing deck, plus the gyroscopic control equipment.

All this would incur a significant weight addition to the ship, at the aftermost extremity of the ship, which has some interesting implications for ship stability. And, space would have to be found within the already constrained and crowded innards of the ship to accommodate the hydraulic equipment and its plumbing.

It’d have to be a super-fast-reacting system, to keep the landing platform level in the quickly-varying conditions of a rough sea.

All in all, just another complicated system to go wrong at exactly the wrong time.

Consider, also, that once you’ve got the helicopter landed on the gyro-stabilised platform, it’s likely to be sitting on an ‘added’ deck, which is at least some short height above the actual deck of the ship itself.

You’ve got to tuck the helicopter away in its hangar, and now you’ve got to get it down a step.

A

OK.
I was thinking a deck on an elevator

Too much complexity.

TTS Motion Compensated Heli Deck System

https://www.youtube.com/watch?v=0MwV4SLmIwM

This animation shows the motion compensated heli deck system. This system, developed by TTS, are installed on the worlds largest seismic vessel, Ramform Sovereign, owned by PGS.

Landing Safely on a Rolling Ship
https://www.skipsrevyen.no/artikkelarkiv/landing-safely-on-a-rolling-ship/226612

To expand the window of operation at sea, Norwegian TTS Offshore Handling Equipment AS has developed a fully automated Active Roll Compensated (ARC) landing platform. The hydraulic control solution for this system was developed by TTS OHE supported by an international Rexroth team. One major advantage:
Having already gained considerable knowhow from being involved in numerous projects for the marine market in Norway, the specialists from Rexroth understood the challenges.
TTS-OHE has already installed the first ARC platform on the “Ramform Sovereign”, the world’s largest and most advanced seismic vessel.

esselte said:

TTS Motion Compensated Heli Deck System

https://www.youtube.com/watch?v=0MwV4SLmIwM

This animation shows the motion compensated heli deck system. This system, developed by TTS, are installed on the worlds largest seismic vessel, Ramform Sovereign, owned by PGS.

Landing Safely on a Rolling Ship
https://www.skipsrevyen.no/artikkelarkiv/landing-safely-on-a-rolling-ship/226612

To expand the window of operation at sea, Norwegian TTS Offshore Handling Equipment AS has developed a fully automated Active Roll Compensated (ARC) landing platform. The hydraulic control solution for this system was developed by TTS OHE supported by an international Rexroth team. One major advantage:
Having already gained considerable knowhow from being involved in numerous projects for the marine market in Norway, the specialists from Rexroth understood the challenges.
TTS-OHE has already installed the first ARC platform on the “Ramform Sovereign”, the world’s largest and most advanced seismic vessel.

Well, i’ll be hornswoggled!

There might be a future for this sort of thing, after all.

esselte said:

TTS Motion Compensated Heli Deck System

https://www.youtube.com/watch?v=0MwV4SLmIwM

This animation shows the motion compensated heli deck system. This system, developed by TTS, are installed on the worlds largest seismic vessel, Ramform Sovereign, owned by PGS.

Landing Safely on a Rolling Ship
https://www.skipsrevyen.no/artikkelarkiv/landing-safely-on-a-rolling-ship/226612

To expand the window of operation at sea, Norwegian TTS Offshore Handling Equipment AS has developed a fully automated Active Roll Compensated (ARC) landing platform. The hydraulic control solution for this system was developed by TTS OHE supported by an international Rexroth team. One major advantage:
Having already gained considerable knowhow from being involved in numerous projects for the marine market in Norway, the specialists from Rexroth understood the challenges.
TTS-OHE has already installed the first ARC platform on the “Ramform Sovereign”, the world’s largest and most advanced seismic vessel.

https://en.wikipedia.org/wiki/Stewart_platform

Link

captain_spalding said:

esselte said:

TTS Motion Compensated Heli Deck System

https://www.youtube.com/watch?v=0MwV4SLmIwM

This animation shows the motion compensated heli deck system. This system, developed by TTS, are installed on the worlds largest seismic vessel, Ramform Sovereign, owned by PGS.

Landing Safely on a Rolling Ship
https://www.skipsrevyen.no/artikkelarkiv/landing-safely-on-a-rolling-ship/226612

To expand the window of operation at sea, Norwegian TTS Offshore Handling Equipment AS has developed a fully automated Active Roll Compensated (ARC) landing platform. The hydraulic control solution for this system was developed by TTS OHE supported by an international Rexroth team. One major advantage:
Having already gained considerable knowhow from being involved in numerous projects for the marine market in Norway, the specialists from Rexroth understood the challenges.
TTS-OHE has already installed the first ARC platform on the “Ramform Sovereign”, the world’s largest and most advanced seismic vessel.

Well, i’ll be hornswoggled!

There might be a future for this sort of thing, after all.

Looks like a big heavy boat with a wide girth.

roughbarked said:

Looks like a big heavy boat with a wide girth.

The Ramform ships all look like “the front fell off” but forgot to sink.

“The delta-shaped Ramform hull was designed by Norwegian naval architect Roar Ramde, and the first seismic Ramform vessel was inspired by the Norwegian naval intelligence vessel Marjata. It’s sinusoidal waterline allows stable motion behavior at the beam. The vast back deck is perfect for installing and towing a large quantity and variety of equipment and also offers generous interior and instrument room capacity….

“Ramform Titan, Ramform Atlas, Ramform Tethys, and Ramform Hyperion are 70 meters wide at the stern and equipped with 24 reels, each capable of holding over 10 km of streamlined seismic recording equipment with inbuilt GeoStreamer technology, and positioning units. They are designed for safe and efficient operations in even the harshest of environments.

-https://www.tgs.com/seismic/marine-acquisition/the-fleet/vessels/ramform-titan