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O.S. Engines

SKU:OS-18642

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

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

Regular price $684.99 CAD
Regular price $896.99 CAD Sale price $684.99 CAD
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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!

Features:

  • Lightweight, machined heat sink head
  • Big-bore carburettors best-suited for the intended use (F3C or 3D)
  • Best precision advanced exhaust cylinder timing (for F3C or 3D)
  • Newly designed combustion chambers, shaped to match the big bore carburettors and advanced exhaust cylinder timing
  • Lightweight, forged steel crankshaft counter weight to lower vibration for higher speeds
  • Improved back plate shape, to accommodate Futaba's BPS-1 RPM Sensor and increase primary pressure for greater stability
  • The cover plate has a cell to accept a sensor designed to install in the cover plate from Futaba GY701 / CGY750 Governor

Technical Specifications

  • Displacement: 14.95cc
  • Bore: 27.7mm
  • Stroke: 24.8mm
  • Output: 3.6ps/15,500RPM
  • Practical RPM Range: 2,000-16,500
  • Weight: 603g

Package Included:

  • Engine Pack O.S. Speed Tuned .91HZ-R Helicopter Engine with Pump, 61G Carburetor
  • #8 Glow Plug
  • Check Valve
  • Head Gasket 0.2mm
  • OS Speed Decal and English Instruction Manual

Customer Reviews

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B
Brian Farnden
Great to deal with, always accommodating.

The staff Is great and always going the extra mile to get me what i need.