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O.S 55HZ-R DRS Ring 40L-R Engine

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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