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  • .91HZ Ring 61E

    By O. S. Engines |
    Product Number OSMG1974
    $0.00

    y Please allow 5-7 days for free in store pick up or flat rate shipping.
    1/10 Desert Truck Rtr
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    This is the O.S. .91HZ F3C Competition Helicopter Engine. Carburetor Needle Settings: High Speed: 2 turns out from fully closed Mid Range: 2 turns open Mixture...*More

    This is the O.S. .91HZ F3C Competition Helicopter Engine. Carburetor Needle Settings: High Speed: 2 turns out from fully closed Mid Range: 2 turns open Mixture Control (low speed): indentation on screw head straight up and down (vertical) jxs 10/14/10 ir/jxs*Less

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    Key FeaturesFull Specs Comments/Reviews
    • Ball bearing supported crankshaft
    • Designed specifically for F3C aerobatic competition
    • Five holes in the top of the piston route gases to the piston ring from within to form a tighter seal with minimum blow by
    • Heat sink type backplate
    • Rectangular heat sink allows engine to be enclosed entirely inside cooling shroud 61-E carburetor with thermal insulator to block heat and a needle valve control lever to control mixture from transmitter, carburetor has three adjustment controls that enable independent adjustment at idling, hovering and high speed
    • Bore:1.09 (27.7mm)
    • Crankshaft Size:5/16-24
    • Displacement:0.91 cu in (14.95 cc)
    • Distance between mounting holes opposite side:2.04 (52mm)
    • Distance between mounting holes same side:0.98 (25mm)
    • Distance between muffler screw holes:1.6 (42mm)
    • Length from backplate to end of crankshaft:4.9 (125.6mm)
    • Length from front bearing to backplate:3.3 (84mm)
    • Output:3.4 PS, 3.35 HP @ 15, 000 RPM
    • Practical RPM Range:2000-16, 000
    • Stroke:0.98 (24.8mm)
    • Weight Without Muffler:1.36lb (618g)
    • Width between mounting tabs:2.4 (61mm)
    • Width of crankcase below mounting tabs:1.7 (43mm)
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