O.S. Engine OSMG0845 FS-40S 4-Stroke Model Aircraft Engine  [OSMG0845]

O.S. Engine OSMG0845 FS-40S - Compact 4-Stroke Power for Model Flying

RC pilots looking for a dependable four-stroke option will appreciate the balance of power and control in this unit. As a member of the Surpass Series, the FS-40S is engineered to deliver stronger output and handle larger diameter propellers, making it suitable for scale builds and sport models alike.

Surpass Series Layout and Components

The Surpass Series layout places a helix gear-driven camshaft at the front and an updraft carburetor at the rear to promote consistent fuel delivery and combustion. The FS-40S ships with a glow plug fitted and a standard silencer included, offering straightforward installation and quiet running for club flying.

Engine Performance Details

This engine has a displacement of 0.396 cubic inches with a bore of 0.835 inches and a stroke of 0.724 inches. Its practical operating range is 2,200 to 12,000 RPM and it produces 0.65 horsepower at 12,000 RPM while weighing approximately 12.5 ounces.

The FS-40S is a versatile choice for both newcomers and seasoned flyers who need steady four-stroke performance and easy mounting options. Its construction supports a range of aircraft types while keeping service routines straightforward.