Hello, some explanation on collision model?
There is no "collision on/off" option on settings, but I don't mind.
I tested it a little, and it seems that (correct me if wrong) it works different from enemy and friendly planes.
Like friendly planes got a smaller "area" of collision, and you need to almost totally overlap the planes to have a collision (which ends being fatal because pilot get killed).
While enemy planes minds better the plane sections (wing tip-wing tip collision happened to me).