OS .91HZ-R 3C Speed Red w/61F
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Discontinued
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More like this... 2-Cycle Glow Helicopter Motors
But only from... OS ENGINES
All items from... OS ENGINES
But only from... OS ENGINES
All items from... OS ENGINES
StockStock availability for on-line ordering 
StockStock availability for pick up
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information is to be used as a general guide to current inventory. There is no guarantee of
availability.
FEATURES
- Lightweight, machined heatsink head
- Big-bore carburetors 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 carburetors and advanced exhaust cylinder timing
- Lightweight, forged steel crankshaft counter weight to lower vibration for higher speeds
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! The 3C version is designed expressly for F3C competition with its controlled, precise maneuvers in mind. For pilots who prefer aggressive, stick-bashing 3D flight competition, O.S. offers a 3D version.
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