If you don't want to go all the way, you can already achieve a "less space" by accounting for air friction forces, though these apply in a simple fashion only when not the aircraft isn't "stalled" (i.e flying forward at a sufficient speed).
I was already thinking about this... However I still need to make it somehow.

About fuel: I'm not gonna use any... , gameplay is to short I think...

thnx for the link... will take a look when i get home...