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

O.S #18510 - OS 91RZ-H DH Ring Engine w/60M-C Carb.
Price:
NZD$440.90
Brand:
O.S. Engine
Model:
OS-18510
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Precision Power in a Small Package

Targeted at seasoned fliers, the O.S. Engine OS-18510 delivers steady, controllable power while keeping a compact footprint for scale canopy installations. It balances dependable operation with the responsiveness required for detailed flying.

Components Built for Consistency

The O.S. Engine OS-18510 pairs a diecast cylinder head with a ringed piston to help maintain steady compression and longevity. The 60M-C carburetor offers three-needle adjustment so you can fine tune mid-range response to match your rotorhead and fuel setup.

Flight Performance Snapshot

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

Whether you fly scale or competition routines, the O.S. Engine OS-18510 offers a robust base for tuning and reliable in-flight behaviour for demanding pilots.

Can a less experienced pilot run the O.S. Engine OS-18510 safely?

It is optimised for experienced pilots, but novices can operate it with careful setup, a proper pit crew approach and mentoring.

Does the engine fit commonly used scale canopies?

The OS-18510 is designed to fit compact canopies used on scale helicopters, but check firewall and mount fits before final installation.

What should I check after the first few flights?

Inspect carburetor settings, glow plug condition and engine mounts, then re-tighten head bolts after thermal cycling to ensure consistent performance.

Are there recommended upgrades for longer life?

Basic upgrades include quality fuel, regular after-run oiling and ensuring vibration isolation for mounts to reduce wear over time.

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