O.S. Engine OSMG1300 FR5-300 Classic Radial Engine for Scale Planes  [OSMG1300]

Authentic Radial Appearance with the O.S. Engine FR5-300

The O.S. Engine FR5-300, model OSMG1300, gives scale aircraft a convincing radial look while supplying dependable mechanical performance. Its five-cylinder arrangement enhances visual authenticity and smooth running characteristics for scale pilots.

Old-School Styling Supported by Modern Components

Although the engine mimics early radial layouts, it uses four ball bearings and two needle bearings to limit friction and extend service life. The combination of a ringed piston, pushrod overhead valves and a tailored inlet manifold keeps operation reliable under regular flying conditions.

Engine Output and Usability

With 0.607 cubic inches per cylinder, the FR5-300 operates across a practical RPM band of 1,800 to 8,500 and produces up to 4.0 hp at 8,000 RPM. The 94.3 ounce mass offers a useful balance of weight and power for a range of scale applications from relaxed circuits to moderate aerobatics.

If you want period-correct looks paired with durable internals, the O.S. Engine FR5-300 is a capable choice. It suits model builders and pilots who prioritise scale fidelity in both appearance and sound.