The fact that the airplane cannot move backwards makes it very hard to park position for the next flight, if you dont land your plane at the edge of your roof, the next time you wanna take off is extremely difficult.

I have built a ramp to take it one more roof up and just doing that maneuver consumed 30% of fuel. The consumption rate of gas is too devouring too. If you dont start with an industrial can in your inventory, its likely you may not be able to make back home.