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tastyfreeze
on Oct 25, 2023
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Sergey Brin's airship gets FAA clearance
Theoretically, yes. The insanely strong structure is the problem. The required strength is too heavy to be lifted by the vacuum.
http://cba.mit.edu/docs/papers/19.01.vacuum.pdf
rtkwe
on Oct 25, 2023
[–]
Even if you could build it so that it is positively buoyant you're only saving a 1-2 grams per liter of helium you replace with vacuum. He and H are extremely good at being light filler gasses.
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Search:
http://cba.mit.edu/docs/papers/19.01.vacuum.pdf