O.S. 55HZ-R DRS Ringed .55 Helicopter Engine

The 55HZ-R DRS engine is designed to meet the unique demands of F3C competition and 3D flight!

• The Demand Regulator System (DRS) uses pressure to consistently deliver the optimal air-fuel mixture to the engine — regardless of the heli's attitude
• Two needles on the carburetor precisely adjust middle and high speeds
• A hole in the cover plate allows for mounting a sensor of Futaba^®'s GY-701 governor, to insure more stable flight
• Cranks out 2,000-20,000 rpm