OS SPEED 91HZ-R 3D

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