Why not fill the wings with helium or other lighter than air solid. ~Lift increases by the cube, weight by the square.
I'm waiting for someone to invent an extremely cheap lighter than air solid which can act like a battery.
I'm waiting for someone to invent an extremely cheap lighter than air solid which can act like a battery.
Is this even possible at normal temperature? I can't imagine this at 1 atm. and room temperature...
after some googl-ing:
Lighter than air solids have the issue that if you remove the air from the spaces in those solids and try to hold it out you create a pressure differential that crushes them.
There was some speculation that given an ability to precisely manipulate carbon you could build dodecahedrons out of pentagons of diamond in a vacuum and then when you removed them from the vacuum they would have a net density lower than that of air, but the density ratio is so small (assuming you could build them) that you'r talking about a massive airship that ascends to maybe 3,000' on a cold day.
Exploiting air density is a challenging path that has not had much success of late.