O.S. 15630 .55HZ-H Hyper Ring 40L

This is the OS 55HZ Hyper Ringed Helicopter Engine with the 40L Carburetor.

Features

• O.S. 15630 .55HZ-H Hyper Ring 40L

• Ideal for 3D flight-power equal to .60 size heli engines

• Same mounting bolt pattern and silencer size as the OS 50SX-H Hyper

• Dual needle 40L carburetor allows independent adjustment of idling, hovering and high speed with four arm throttle lever for use with a variety of servo brands

• HZ Hyper low profile black aluminum six fin cylinder head

• Two year limited warranty through manufacturer beginning at the date of purchase

Specifications

• Displacement: 0.55 cu in (8.93cc)

• Bore: 0.91" (23mm)

• Stroke: 0.85" (23.5mm)

• Practical RPM: 2,000-17,000 RPM

• Weight: 14.39oz (408g)

• Carburetor Settings:

• High Speed Needle Valve, Two turns open from fully closed

• Idle Mixture Control Screw, Factory set-do not adjust

• Medium Speed Needle Valve, Two turns open from fully closed

• Distance/top of cylinder head-bottom of mounting tabs: 2.8" (72.6mm)

• Distance between mounting holes same side: 0.68" (17.5mm)

• Distance between mounting holes opposite side: 1.73" (44mm)

• Distance between muffler mounting holes: 1.4" (37mm)

• Cylinder Head Diameter: 1.8" (47mm)

• Distance/bottom of crankcase to top of cylinder head: 3.6" (90.9mm)

• Distance from center of engine to front bearing: 2.03" (51.6mm)

• Distance from center of engine to end of Crankshaft: 3.2" (82.6mm)

• Distance from center of engine to backplate bolt: 0.98" (25mm)

• Distance from center of engine to throttle lever: 1.5" (38mm)

Package Contents

• OS 55HZ Hyper Ringed Helicopter Engine with 40L Carburetor, #8 glow plug and instruction manual

Requirements

• 10% to 30% nitro Fuel with at least 18% lubricant (Helicopter Mix)

• Exhaust system such as the OS PowerBoost Pipe, OSMG2880

• Starting equipment

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