This is the O.S. .91HZ F3C Competition Helicopter Engine.
**Additional Technical Info Will Be Added When It Becomes Available.**
FEATURES: Designed specifically for F3C aerobatic competition
Rectangular heat sink allows engine to be enclosed entirely inside
cooling shroud
61-B carburetor with thermal insulator to block heat and a needle
valve control lever to control mixture from transmitter
Newly designed piston and crankshaft for reduced vibration and
improved torque stability over entire RPM range
Ball bearing supported crankshaft
One year limited warranty
INCLUDES: O.S. .91 HZ F3C Competition Helicopter Engine with #8 glow plug,
needle control lever, extra 0.2mm head gasket, cap screws and
instruction manual
REQUIRES: Fuel: 10%-30% nitromethane with at least 18% lubricant. Lubricants
may be either castor or synthetic oil or castor/synthetic blend.
Field Equipment: glow starter, fuel bulb, fuel can filter, fuel pump
hexagonal starting shaft (depending on brand of helicopter)
electric starter, battery and fuel tubing
Muffler- This is specific to the heli
SPECS: Displacement: 0.91 cu in (14.95 cc)
Bore: 1.09" (27.7mm)
Stroke: 0.98" (24.8mm)
Output: 3.4 hp @ 15,000 RPM
Practical RPM Range: 2000-16,000
Weight Without Muffler: 1.36lb (618g)
Height from crankcase bottom to top of cylinder head:
Height/bottom of mounting tab to top of cylinder head:
Distance between mounting holes same side:
Distance between mounting holes opposite side
Distance between muffler screw holes:
Distance/bottom of mounting tab to muffler screw holes:
Length from front of case to backplate:
Length from backplate to end of crankshaft:
Width of crankcase below mounting tabs:
Width between mounting tabs:
