Precision Rotary Motor O.S. Engine OSMG1401 49-PI Type II .30 Wankel Rotary Engine  [OSMG1401]

Small-Form Rotary Engine with Quiet Operation

The O.S. Engine 49-PI Type II .30 Wankel Rotary Engine offers a compact source of smooth thrust for light aircraft. Its rotary principle and quality bearings reduce vibration, delivering a refined running character well suited to detail models and sport flyers.

Rotary Mechanics and Smooth Running

Unlike multi-cylinder piston units, the Wankel design has fewer reciprocating components, which lowers mechanical vibration and noise. Needle bearings and a supporting ball bearing give stable rotor support for consistent performance.

Key Performance Figures

The engine displaces 0.30 cu in (4.97 cc) and produces 1.27 hp at 17,000 rpm, with a practical operating window between 2,500 and 18,000 rpm. These figures allow flexibility across different flying styles depending on propeller selection.

Installation and Intake Considerations

Mounting is versatile because the muffler can be rotated to suit cowlings and exhaust runs. The Venturi-style feed improves airflow into the carburetor, aiding throttle response and mixture stability during varied flight conditions.

For hobbyists who need compact, low-vibration power in a small footprint, the O.S. Engine 49-PI Type II .30 Wankel Rotary Engine is a sensible choice. Its broad rpm range and fitting options make it adaptable to a range of small model projects.