My idea for this is that engines (props, jets, VTOL) can be chosen to use fuel for a specific fuel holding aspect of the plane.
This way, people can make very powerful engines at the back of planes with a small fuel tank that the engine only drinks fuel from that tank, so that when it uses all the amount of fuel it needs, it can be dropped off.
This would be ideal for fighter jets to act as a sort of catapult to take off from carriers (USS Tiny, Beast).
I would love this feature added in the game and as well as an arresting cable & tail hook so that actual navy based replicas (or fictional navy based planes) can do actualy carrier landings without having to add a huge parachute or having to go very slow.