Thanks for the reply.
Instead of using heavy batteries as accumulators, the plan is to use a hybrid H2-air fuel cell/supercapacitor system to smooth out the input from solar cells and the wind turbine before it goes to the inverter. If hydrogen is used as the lift gas, then there's an ample...
So I'm working on a thesis project at the moment designing an airship, and I've run into a bit of a stumbling point.
I'm wondering if it would be possible to have a propeller that works to produce propulsive power when it needs to fly, but when the craft is tethered could operate as an...