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I don’t get the idea of having a separate pressure hull for your helicopter hangar. Surely if your submarine is compromised to the point of needing the pressure

by Aeolun 3y ago

I don’t get the idea of having a separate pressure hull for your helicopter hangar. Surely if your submarine is compromised to the point of needing the pressure hull you are long past the point where your helicopter is going to save you.

FredPret 3y ago
There’s an excellent documentary series about things that go wrong with superyachts called James Bond. Having seen that, I’d certainly invest in a pressure hull hangar if I were so inclined.
defrost 3y ago
Helicopter hanger has the largest door into a pressure hull area, it's the largest point of failure - if it fails, it's isolated from the living space (and other sub areas). It's smart safety design.
- MilStdJunkie 3y ago
  Yup, yup, yup. Everything human-usable is going to be in a pressure hull, because a hundred meters of depth is going to absolutely wreck more or less everything. Especially seals. Hangar doors give me nightmares. They might pressurize the crew spaces, a little, but it's really not possible to crank up the air pressure meaningfully for any duration, too hard on the body, and totally lethal if they come up too fast. On that subject google up "saturation diving" for some frickin' horrors. Those dudes make bank, but whew, talk about earning it.
- Aeolun 3y ago
  I was thinking more that it didn’t need a pressure hull at all, but after your message I realized it would kinda ruin the helicopter xD I read their adverts to mean that the ship was so expensive even the helicopter got it’s own pressure hull. But I should understand it as the helicopter can’t do without a pressure hull, and the special part is that it’s _separate_ from the human hull.
stickfigure 3y ago
It's probably a safety concern. A helicopter hangar requires a very large watertight door. Very large doors are less safe than small doors. In the event of failure, better to lose the helicopter than the crew. See also: https://en.wikipedia.org/wiki/I-400-class_submarine https://en.wikipedia.org/wiki/I-400-class_submarine

by Aeolun 3y ago

FredPret 3y ago

There’s an excellent documentary series about things that go wrong with superyachts called James Bond. Having seen that, I’d certainly invest in a pressure hull hangar if I were so inclined.

defrost 3y ago

Helicopter hanger has the largest door into a pressure hull area, it's the largest point of failure - if it fails, it's isolated from the living space (and other sub areas). It's smart safety design.

MilStdJunkie 3y ago
Yup, yup, yup. Everything human-usable is going to be in a pressure hull, because a hundred meters of depth is going to absolutely wreck more or less everything. Especially seals. Hangar doors give me nightmares. They might pressurize the crew spaces, a little, but it's really not possible to crank up the air pressure meaningfully for any duration, too hard on the body, and totally lethal if they come up too fast. On that subject google up "saturation diving" for some frickin' horrors. Those dudes make bank, but whew, talk about earning it.
Aeolun 3y ago
I was thinking more that it didn’t need a pressure hull at all, but after your message I realized it would kinda ruin the helicopter xD I read their adverts to mean that the ship was so expensive even the helicopter got it’s own pressure hull. But I should understand it as the helicopter can’t do without a pressure hull, and the special part is that it’s _separate_ from the human hull.

stickfigure 3y ago

It's probably a safety concern. A helicopter hangar requires a very large watertight door. Very large doors are less safe than small doors. In the event of failure, better to lose the helicopter than the crew. See also: https://en.wikipedia.org/wiki/I-400-class_submarine https://en.wikipedia.org/wiki/I-400-class_submarine