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O.S. Engines

Multi-Cylinder 4 Strokes

The highest achievement of O.S. Engines' manufacturing expertise.

O.S. Multi-Cylinder 4 Strokes
Add the crowning touch to your giant-scale project: install an O.S. Multi-Cylinder or Twin 4-stroke engine! Ringed piston construction boosts durability. Ball bearings minimize friction and wear. Efficient carburetion adds reliability and fuel economy. Low vibration levels protect your carefully assembled airframe. The FT-160 is the "big-bore" version of the legendary FT-120II. Only one R/C ringed piston "flat four" engine has ever been produced, and that's the FF-320. Seven ball bearings add extra glide. NOTE: O.S. recommends fuel with 5-10% nitro and a minimum of 16% lubricant for all twin-and multi-cylinder engines.

FT-160 Twin
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FF-320 Pegasus 4-Cylinder
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