Why not give us blimps Z?
Barrage balloons or "blimps" would be easy enough to shoot down (for points) , but until they were, they would make dogfighting more difficult around the airfields or other protected areas. You would have to think twice in order to not have your wings cut off by the wires. It would increase the authenticity of the game, and would make fighting around the airports more interesting. Blimps would also be easy to implement, I think, - or am I wrong about that?