Heli pilots looking for peak performance need look no further than this outstanding pair of brushless outrunner heli motors from O.S. Both are precision engineered for sport flying and 3D maneuvers, designed to reduce friction for increased power …

Ideal for aerobatic or scale aircraft, the 4-stroke GF40 offers excellent torque and a realistic sound, plus fuel economy and the fit and finish O.S. is famous for. Other features include a Walbro® carburetor and an integrated choke …