O.S. Engine OSMG1300 FR5-300 Radial 5-Cylinder Scale Engine  [OSMG1300]

Rediscover Golden Era Styling with the O.S. Engine FR5-300

The O.S. Engine FR5-300, model OSMG1300, recreates classic radial aesthetics while supplying practical power for scale models. Its five-cylinder layout gives an authentic appearance and dependable output that appeals to collectors and active flyers alike.

Timeless Radial Form with Robust Internal Bearing Setup

The radial layout echoes early aviation design while four ball bearings and two needle bearings reduce friction for smoother running and longer service life. A ringed piston design, pushrod overhead valves and a dedicated inlet manifold combine to prioritise reliability and consistent performance.

Measured Power and Usable RPM Range

Each cylinder displaces 0.607 cubic inches, and the FR5-300 works comfortably from 1,800 to 8,500 RPM, making up to 4.0 horsepower at 8,000 RPM. Weighing 94.3 ounces, it balances mass and output to suit a variety of scale flying profiles from relaxed cruising to more assertive manoeuvres.

The O.S. Engine FR5-300 is a strong choice for RC pilots who want period-correct styling with modern durability. Whether restoring a scale subject or powering a display-worthy model, this engine delivers both character and capability.