I fly my GP Cherokee with an SK 50, APC 12X5 prop. I have also flown it with a magnum 46 XLS with the 11X6 prop to good effect. With the weight of flap servos and separate (2) aileron servos, this plane flys on the heavy side, and I would recommend against adding anymore weight than neccessary to it. It's a good windy day plane, as its weight does penetrate wind better.