Citat:
Ursprungligen postat av
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"RUSH: What's left to worry about is the things people don't worry about, which is: you're on a ship in the open ocean. I worry more about people falling and having a head injury—breaking their arm—collarbone. You know, you're on a boat. The most dangerous thing is the boat.
POGUE: You call that more dangerous than this [sub]?
RUSH: Yes. Once you've been sealed inside this, we have four days of life support. That is the safest place on planet Earth."
Kanske stämt om den var byggd helt av titan.
RUSH: The key thing we've done with the pressure vessel is, it's made of carbon fiber.
Carbon fiber is a great material. It's better than titanium. It's better than a lot of other materials. But you can have a catastrophic failure where you can have imperfections in the structure that you wouldn't have in a metal. And so you really have to watch how you make it. (LAUGH)
POGUE: Well, if they weren't using carbon fiber for submersibles, and if one little crack could send you to your death, why did you use it? You don't need it to be lightweight.
RUSH: Yes, you do. The interesting thing is, carbon fiber is three times better than titanium on strength-to-buoyancy. So when you're underwater, it's strength-to-buoyancy, not strength-to-weight. And so, because we make it out of carbon fiber, all of a sudden my pressure vessel is lighter than the water it displaces.