As you guys know, Simple Planes is (quite) in the lack of engines. And most of them use fuel to run. How about adding some new types?

If you go eco, you could add a compressed air engine that runs infinitely by compressing air that is taken inside by an inlet and then transfers to a prop engine for it to run?
Or if you like electricity, there could be solar panels that generate power for the engines or wind power generating by the engines themselves? Or just simply add a new kind of power: electricity- by making the fuselage carries electricity rather than fuel!

Please add this to SP because the game is (quite) in the lack of engines and fuel!

Thank you, Zertic.