O.S. Engine OSMG1426 25LA-S Control-Line Running Engine  [OSMG1426]

O.S. Engine OSMG1426 25LA-S Designed for Consistent Control-Line Flight

The O.S. Engine 25LA-S, catalogued as OSMG1426, focuses on delivering steady rpm and straightforward handling for control-line aircraft. It is tuned to give predictable behaviour during turns and manoeuvres.

Advantages of the Venturi System

The venturi arrangement takes the place of a conventional carburetor to stabilise engine speed under the steady loads typical of control-line flying. A remote rear needle valve keeps adjustment points out of harm's way while remaining accessible for fine trimming.

Sturdy Design Elements

Featuring a heavy one-piece crankcase with webbing reinforcement, the 25LA-S resists stress and maintains alignment. Bronze bushings reduce wear, and the longer crank with flat washer helps secure the prop. The squared heat sink head and enlarged fins contribute to better cooling and longer component life.

Whether for practice or contest flying, the 25LA-S provides steady, maintainable performance that suits a range of control-line pilots.