Re: Airship to Orbit question


Chance wrote:
So is this is just a crazy idea, [[a vacuum-filled balloon]] or is
> it possible?
It's neither. It's not crazy and it's not possible with any balloon
current flight profile. Vacuum is cheaper than helium. But most people
don't realize the implosive force of one bar on a vacuum container. A
bar is 14.7 pounds per square inch, multiplied by the hundreds of
thousands of square inches on the surface of a large lifting tank.
So, the reinforced, honeycombed vacuum container would have to be
lifted to the stratosphere and then vacuumed-out where it could rise to
near space but not, of course, to space, which is a vacuum itself.
Similar to a two stage rocket, this would be a "two-stage balloon."
In practice, a partial vacuum would be drawn slowly during ascension
so as to maintain a safe pressure differential on the vacuum tank.

.

Relevant Pages

  • Re: Airship to Orbit question
    ... It's not crazy and it's not possible with any balloon ... Vacuum is cheaper than helium. ... > bar is 14.7 pounds per square inch, ... > thousands of square inches on the surface of a large lifting tank. ...
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