price:11,550,000 Rials

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Displacement: 0.55 cu in (8.93 cc)
Bore: 0.91 in (23 mm)
Stroke: 0.85 in (21.5 mm)
Practical rpm: 2,000-20,000
Output: 2.07 hp @ 17,000 rpm
Weight: 14.39 oz (408 g)


The power of a .60 in a .55!

The O. S. 55HZ-H Hyper Ringed Heli engine is cause to rejoice for 3D heli fliers! The 55-HZ-H Hyper Ringed engine cranks out optimum power with a minimum of space! The PowerBoost Pipe 50/55 is a first from O.S. – designed especially for helis, improving efficiency and power while featuring a compact size. It also fits the 50SX-H Hyper Ringed heli engine.

  • Features the same mounting pattern and silencer size as the 50SX-H Hyper engine
  • Dual needle 40L carburetor with four-arm throttle lever is designed to optimize the power, performance and reliability of the 55HZ
  • Produces a range of 2,000 - 20,000 rpm