ORIGINAL: Stew99
I've seen 3D type planes that use thrust differential on twin engines to help turn the plane but I don't know of any that use a vectorable single engine. If you are suggesting using vectorable thrust instead of the normal flight controls, this would be fun to experiment with but I think I would try it on one of those indestructable foam planes first. What would be even cooler would be to couple a vectorable thrust control with the regular flight controls. A plane like that would be capable of some really bizarre manuevers.
Some of the cheap electrics have no flight controls at all. Just motor thrust variations. The twins turn with differential, and climb/descend with power.
It's useable, but not all that practical for other than a disposable toy.
Insufficent authority/response for good controllable flying, more than gentle turning and climb/dives.
A motor on a gimbal is an exercise in connecting the axis controlling hardware, as well as figuring out the torque resistance needed so it doesn't twist itself right off the front of the plane.