O.S. Engines 91 HZ-R 3C speed helicopter engine is designed for all-out F3C competition. Demand Regulator System ensures consistent fuel delivery from full to empty. 170Âº exhaust timing for optimal horsepower and stable hovering. Newly designed combustion chamber shaped to match the big bore carburetor and advanced exhaust cylinder timing. 0.456" (11.6mm) Big Bore carburetor for greatest power needed for F3C maneuvers. Crankshaft counter-weight reduces vibration at high RPM.
Fuel: 10%-30% nitromethane with at least 18% lubricant. Lubricants may be either castor or synthetic oil or castor/synthetic blend.
Field Equipment: glow starter, fuel bulb, fuel can filter, fuel pump hexagonal starting shaft (depending on brand of helicopter) electric starter, battery and fuel tubing
Muffler-Depending on heli