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  • 91HZ-R 3D Speed Black 61G

    By O. S. Engines |
    Product Number OSMG1981
    $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. Engines 91 HZ-R 3D Speed Helicopter Engine in Black. ****** Because of the competition nature of this engine,****** ******it is NOT covered by ...*More

    This is the O.S. Engines 91 HZ-R 3D Speed Helicopter Engine in Black. ****** Because of the competition nature of this engine,****** ******it is NOT covered by the O.S. 2 Year Warranty.****** Carburetor Adjustments- High Speed Needle Valve: Turn approximately 30¦ (3-4 clicks) during initial adjustments, then approximately 15¦ (1-2 clicks) when making final adjustments Medium Speed Needle Valve: Turn approximately 30¦ (3-4 clicks) at a time jxs 04/08/11 ir/jxs*Less

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    Key FeaturesFull Specs Comments/Reviews
    • Big Bore carburetor is designed to develope stable horsepower at 70-80% throttle which is widely used in 3D flight
    • Demand Regulator System ensures consistent fuel delivery from full to empty 165¦ exhaust timing for optimal horsepower and stable hovering
    • Designed for all-out 3D competition
    • Newly designed combustion chamber shaped to match the big bore carburetor and advanced exhaust cylinder timing
    • Bore:1.091 (27.7mm)
    • Crankshaft Size:5/16-24
    • Displacement:0.91cu in (14.9cc)
    • Distance between mounting hole centers same side:0.98 (25mm)
    • Distance/center of muffler screw holes:1.6 (42mm)
    • Distance/mounting hole centers opposite side:2 (52mm)
    • Length from backplate to end of crankshaft:4.5 (116mm)
    • Length from front bearing to backplate:3.3 (84mm)
    • Output:3.6 PS, 3.55 HP/15, 500 RPM
    • Practical RPM Range:2, 000 - 16, 000 RPM
    • Stroke:0.976 (24.8mm)
    • Weight (w/o Muffler):21.27oz (603g)
    • Width between mounting tabs:2.4 (61mm)
    • Width of crankcase below mounting tabs:1.7 (43mm)
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