O.S. Engine OSMG0956 56FS-a 4-Stroke Engine for 40-Size RC Planes  [OSMG0956]

Refined 4-stroke design for 40-size RC planes

The O.S. Engine OSMG0956 56FS-a is an alpha-series 4-stroke developed for 40-size aircraft, offering meaningful upgrades without changing the engine footprint used by the 52FS. That makes it a straightforward option for pilots upgrading their powerplant.

Design details that improve day-to-day use

Key to the 56FS-a is its muffler assembly, which includes a multi-positional manifold and a rubber O-ring to limit oil leakage and dampen exhaust sound. The new lubrication approach removes the need for crankcase ventilation, reducing installation complexity.

Fuel system tuned for economy and response

The fitted 40NA carburetor features a venturi to cut fuel drip and smooth the air/fuel path, improving combustion efficiency and throttle response across the operating range.

The O.S. Engine OSMG0956 56FS-a is well suited to pilots who want an easy-install 4-stroke with improved sealing and a simpler lubrication setup for 40-size airframes.