Jets pointed down work for the Harrier, Helicopters fly by rotary wing. Airships are older that aircraft. Aerodynamic lift is nothing but Drag focused on the upper wing. And Airships have plenty of drag. And less need for lift.
Photo-voltaic cells and electric motors are flying today.
Blending of technologies seems like the way to go.
Lets examine that drag treory. I’ve been wrong before.
Is lift a function of drag or not?
Is it an additional force seperate from drag?