What about the energy to keep it hot ?
Quote:
Originally Posted by freebeard
Hydrogen does not produce orange flames and smoke. The powdered aluminum in the doped fabric skin does.
A hot hydrogen vacuum would provide the maximum possible lift. So how would you architect that?
Here is a tensegrity [prolated] sphere, to a rough approximation. It could be put into an aerobody of revolution and filled (emptied?) with hydrogen at a <1bar pressure. The heat would be contained by an enveloping blanket within the aerobody, filled with steam.
Pure steam has almost the lift of helium, but by adding or withholding heat it is dynamic. |