Designed expressly for F3C competition, the O.S. Engines 91HZ delivers the high-end power and hovering stability needed for executing competition-level heli maneuvers. For discriminating pilots looking for an edge!

  • The piston and crankshaft are newly designed to further reduce vibration and improve torque stability over the entire rpm range.
  • The rectangular heatsink has been designed to enable it to fit entirely inside the cooling shroud while maximizing the cooling effects and lowering operational temperatures.
  • A thermo insulator on the carburetor blocks engine heat to ensure more stable fuel/air mix.
  • Includes a needle valve control lever to allow for in-flight carb adjustments as needed for F3C competition.

SPECIFICATIONS
Displacement: 0.91 cu in (14.95 cc)
Bore: 1.09 in (27.7 mm)
Stroke: 0.98 in (24.8 mm)
Practical RPM: 2,000-16,000
Power Output: 3.4 hp @ 15,000 rpm
Weight: 1.36 lb (618 g)
Includes: #8 glow plug, needle control lever, extra 0.2 mm head gasket, cap screws

                             Retail
OSMG1975 Edge 540T EP ARF   $649.99

Visit the O.S. Engines website at www.osengines.com

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