55HZ-R DRS Ringed Helicopter Engine (OSMG1957)

The 55HZ-R DRS Ringed .55 helicopter engine is a high‑performance powerplant designed for serious RC heli pilots. It uses the Demand Regulator System to deliver a stable air‑fuel mix and consistent power, even as the model tilts or changes attitude in flight. A built‑in rpm-sensor mount supports governors and gyro systems, while the carburetor’s dual needles allow precise tuning of mid‑range and high‑speed settings for reliable, repeatable performance.

Practical features support straightforward setup, including a glow plug and check valve, and a cover‑plate hole that accommodates an rpm sensor for precise RPM control with common governor or gyro configurations. With its robust ringed design and easy tuning, this engine delivers smooth throttle response, stable idle, and steady RPM across flight, backed by a two‑year warranty.