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

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

      SKU : OSMG1957
      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...
      $427.49
      $474.99
      $427.49
    • O.S.Engine 105HZ-R DRS 1.05 Helicopter Engine - HeliDirect

      O.S.Engine 105HZ-R DRS 1.05 Helicopter Engine

      SKU : OSMG1961
      This is the 105HZ DRS 1.05 cu in Helicopter Engine from O.S. Engines. **Additional Technical Info Will Be Added When It Becomes Available.** FEATURES: Same mounting dimensions as a .90 cu in engine Machined blue anodized aluminum heatsink cylinder head Velocity stack increases airflow...
      $602.04
      $668.93
      $602.04
    • O.S.Engine 55HZ-H Hyper Ringed .55 Helicopter Engine - HeliDirect
      Out Of Stock

      O.S.Engine 55HZ-H Hyper Ringed .55 Helicopter Engine

      SKU : OSMG1955
      This is the OS 55HZ Hyper Ringed Helicopter Engine with the 40L Carburetor.     Best suited for 3D flight! Amazing power equal to 60 size engine changes the common knowledge of the 50 size helicopter engines! It can be installed in the 50...
      $350.99
      $389.99
      $350.99
      Out Of Stock
    • O.S.Speed 91HZ-R 3D Helicopter Engine - HeliDirectO.S.Speed 91HZ-R 3D Helicopter Engine - HeliDirect

      O.S.Speed 91HZ-R 3D Helicopter Engine

      SKU : OS-18642
      Following the popularity of the 91HZ-R with On-Demand Regulator, O.S. has now taken high-performance, high-speed helicopter engines to the next stage of evolution. Introducing the 91HZ-R Speed Engines - based on the 91HZ-R, factory-tuned at the O.S./Japan facilities and guaranteed to blow you away!...
      $584.99
      $649.99
      $584.99
    • O.S.Engine 105HZ 1.05 Helicopter Engine - HeliDirect

      O.S.Engine 105HZ 1.05 Helicopter Engine

      SKU : OSMG1960
      This is the 105HZ 1.05 cu in Helicopter Engine from O.S. Engines. **Additional Technical Info Will Be Added When It Becomes Available.** FEATURES: Same mounting dimensions as a .90 cu in engine Machined blue anodized aluminum heatsink cylinder head Velocity stack increases airflow and...
      $512.99
      $569.99
      $512.99