Vacuum hulls for quiet navy submarines

[Darren_Garrison]

@LSLGuy

Oh no! not the vacuum blimp again. Last time I remember we went for pages and pages about vacuum blimps / balloons and the proponents just Would. Not. Get. It.

Not the most recent one, but I think you mean this:

Why no vacuum or hydrogen based airships?

I know that the Hindenburg clearly put a dent in people’s confidence in hydrogen’s usefulness in lighter than air travel, but that was a very long time ago, and there are still questions as to whether the hydrogen or the paint involved was responsible for that disaster. One would think that after th better part of a century, with new materials and technology that someone could engineer a way to use hydrogen safely in lighter than air travel. It weighs half of what helium does and is nowhere n…