O.S. Engine OS-18510 - 91RZ-H DH Ring Engine with 60M-C Carburetor (Competition Ready)  [OS-18510]

O.S #18510 - OS 91RZ-H DH Ring Engine w/60M-C Carb.
Price:
AUD$366.25
Brand:
O.S. Engine
Model:
OS-18510
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Reliable Thrust for Serious Helicopter Builds

Favoured by experienced pilots, the O.S. Engine OS-18510 combines reliable output with a form factor that fits tight canopy spaces. Its construction supports repeated flights and precise adjustments for different flying styles.

Durable Construction Meets Fine Tuning

The O.S. Engine OS-18510 employs a diecast head and ringed piston to promote lasting service life and steady compression. The 60M-C carburetor's three-needle setup provides the tuning range needed to shape mid-range torque and throttle response.

Operational Metrics

Specifications

  • Displacement: 0.912 cu in (14.95 cc)
  • Bore: 1.091" (27.7mm)
  • Stroke: 0.976" (24.8mm)
  • Practical RPM: 2000-16,000
  • Power Output: 3.3 ps @ 15,000 RPM
  • Weight: 22.0oz (623g)
  • Crankshaft Size: 5/16-24

For pilots pushing for precise control and repeatable runs, the O.S. Engine OS-18510 provides a solid, tunable platform for high-performance RC helicopter setups.

Is the O.S. Engine OS-18510 suited to competition flying?

Yes, its consistent output and tuning options make it a good candidate for competitive flying once properly set up.

How does the ringed piston affect maintenance?

The ringed piston gives good sealing and longevity but requires regular inspection and proper running-in to maintain peak condition.

What are common setup tips for smooth idle and throttle up?

Tune low and mid needles gradually, ensure the carburetor is clean, and verify needle seating before increasing high-end settings.

Any storage or after-run care you recommend?

Use after-run oil to protect internal parts, store the engine in a dry place and periodically rotate the crank to keep components lubricated.

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