O.S. Engines Multi-Cylinder 4 Strokes

O.S. Engines® Multi-Cylinder 4-Strokes

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

FT-300 Gemini Twin

FF-320 Pegasus

Incredibly realistic in both looks and sounds.

FT-160 Twin

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. Four-Stroke Twins include the FT-160, the “big-bore” version of the legendary FT-120II, and the FT-300, O.S. Engines’ largest horizontally opposed flat twin. 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. All include mount, glow plugs, glow plug extension cables, locking prop nut assemblies and headers. 2-year limited warranty.

NOTE: O.S. recommends fuel with 5-10% nitro and a minimum of 16% lubricant for all twin-and multi-cylinder engines.