OS Airplane Engines
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The standard in sport engine technology, in a unique streamlined design More cooling fin area extends the life of the engine, and virtually eliminates engine seizures in the air Added "webbing" on the crankcase strengthens high-stress areas to help ensure that they stand up to the rigors of learning to fly Overall tighter needle valve fit utilizes an "O" ring to help maintain the performance levels you need A fuel inlet that points up allows for easier fuel line access for fueling and defueling

Displacement: 0.15 cu in (2.5 cc)
Bore: 0.598 in (15.2 mm)
Stroke: 0.539 in (13.7 mm)
Practical rpm: 2,500-18,000
Output: 0.40 hp @ 17,000 rpm
Weight: 4.87 oz (138 g)
Includes: #A3 glow plug, 10G carburetor, #871 muffler
Recommended props: 7x4, 7x5, 8x4, 8x5

OS 15LA Engine


OS 55 AX

More muscle for mid-sized planes! Put more power in your .40-size model the easy way: just drop in a 55AX engine. It has the same bolt pattern as the 46AX for no-mod retrofits, but it also has the added displacement it needs to swing bigger props and everything you need for better 3D, precision and sport flying. Direct, bolt-in replacement for the 46AX. A diagonally-placed needle offers more pilot safety and eliminates the need for a remote needle valve. The 6-sided, angular head offers unique looks and significantly increases surface area for better cooling.

Displacement: 0.545 cu in (9 cc)
Bore: 0.91 in (23 mm)
Stroke: 0.85 in (21.5 mm)
Practical rpm: 2,000-17,000
Output: 1.68 hp @ 16,000 rpm
Weight: 14.3 oz (404 g) w/o muffler 18.52 oz (525 g) w/ muffler
Includes: #8 glow plug, E-3071 Power Box muffler & needle valve extension
Recommended props: 11x6, 11x7, 12x6, 12x7, 12x8 & 13x6

OS 55 AX Engine with muffler







OS FS 70 Ultimate

OS FS-70U Ultimate 4-cycle engine comes equipped with the OS FS-70U diaphragm type fuel pump and matching Type 60U carburettor incorporating a built-in pressure regulator. The regulator will ensure that fuel/air mixture is maintained at a constant level through maneuvers, for consistent performance and reliable throttle response. This engine also comes with a Type F-4020 baffled muffler to reduce engine noise level with substantially enlarged volume
20.0 oz

OS FS70 Ultimate








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