18641 (Graupner 2788)

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OS. Speed 91HZ-R, 3C (18641) (Graupner 2788)


€449,00 incl. btw


In prijs verlaagd!

OS. Speed 91HZ-R,  for 3C (18641)  (Graupner 2788)
For T-rex 700 and Raptor 90 size helicopters 
Designed for precision aerobatics! 
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.
Achieve faster flight speeds and improved hovering stability.
Features include:  
  •  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
  •  Improved backplate shape, to accommodate Futaba's BPS-1 RPM Sensor and increase primary pressure for greater stability

Stock Number: OSMG1980
Displacement: 0.91 cu in (14.9 cc)
Bore: 1.09 in (27.7 mm)
Stroke: 0.98 in (24.8 mm)
Output: 3.6 hp @ 15500 rpm
Practical RPM Range: 2,000-16,500
Weight (w/o Muffler): 21.2 oz (603 g)
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