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Unread 25-02-2010, 11:55
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JamesCH95 JamesCH95 is offline
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Re: Kinda stupid question...

Quote:
Originally Posted by iCurtis View Post
Hydrogen is only half the weight of Helium, but since buoyancy is proportional to the difference in density, the gain in buoyancy is only ~9%. Not to mention if you plan on filling your robot with hydrogen, you better be darn sure your robot won't short anywhere -- that would be quite the show.
As long as you keep the hydrogen concentrations above 95% or below 2% (IIRC) hydrogen won't ignite. It's used in electrical generators (think ConEd, city-sized generators) under positive pressure to dissipate heat from the internals because hydrogen is more thermally conductive than air. Crazy, right?

Using it to loose weight on a robot is just silly.
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