O.S. Engine OSMG1300 FR5-300 Vintage-Style Radial Powerplant  [OSMG1300]

Classic Radial Character with the O.S. Engine FR5-300

The O.S. Engine FR5-300, identified as OSMG1300, brings authentic radial styling to scale aircraft while providing reliable running characteristics. Its five-cylinder layout creates the period look and smooth power delivery that many scale modellers seek.

Period Appearance Backed by Durable Bearing Design

This radial form captures the look of early aviation but uses modern components such as four ball bearings and two needle bearings to reduce wear and vibration. The ringed piston construction, pushrod-operated overhead valves and a dedicated inlet manifold contribute to consistent operation and longevity.

Practical Output and Operating Band

Each cylinder has a displacement of 0.607 cubic inches, and the FR5-300 runs efficiently from 1,800 to 8,500 RPM, peaking near 4.0 hp at 8,000 RPM. At 94.3 ounces, the engine strikes a balance between heft and usable power for a variety of scale flying roles.

For scale enthusiasts wanting an authentic radial look with up-to-date internals, the O.S. Engine FR5-300 delivers credible sound and power. It suits display models and pilots who value period accuracy in flight.