O.S. Engine hyper Ringed helicopter engine is ideal for 3D flight-power equal to .60 size heli engines. Same mounting bolt pattern and silencer size as the OS 50SX-H Hyper. Dual needle 40L carburetor with four arm throttle lever for use with a variety of servo brands. Two year limited warranty through manufacturer beginning at the date of purchase.
Requires: 10% to 30% nitro Fuel with at least 18% lubricant (Helicopter Mix). Starting equipment.