O.S. Engine 55HZ-R DRS Helicopter Engine  [OS-15650]

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

SPECIFICATIONS:
Stock Number: OSMG1957
Displacement: 0.55 cu in (8.93 cc)
Bore: 0.91 in (23 mm)
Stroke: 0.85 in (23.5 mm)
Practical rpm: 2,000-20,000
Weight: 15.1 oz (429 g)