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Ships within 48 hours · Estimated delivery Jul 30 - Aug 4
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Description
O.S. Speed 91HZ-R 3D Helicopter EngineFollowing 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
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 Carb
- #8 Glow Plug
- Check Valve
- Head Gasket 0.2mm
- OS Speed Decal and English Instruction Manual
Pipe: O.S. Powerboost Pipe 105
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy