O.S. Engine OSMG1250 FT-300 High Performance Flat Twin  [OSMG1250]

Refined Flat Twin Design in the O.S. Engine FT-300

Model flyers who demand realistic engine character and controllable output will appreciate the O.S. Engine FT-300. This largest flat twin from O.S. is engineered to bring smooth, scale-accurate operation to 1/4 scale models without excessive bulk.

Measured specifications and mechanical focus

The FT-300 reflects O.S. attention to detail: a displacement of 1.488 x 2 inches, 1.323 inch bore and a rated power of 4.0 hp at 7,000 rpm. Its practical rpm window of 1,800 to 9,000 and its 64.5 oz weight make it suitable for a wide range of quarter-scale airframes.

Practical reasons to prefer a twin layout

The horizontally opposed twin reduces vibration and improves throttle smoothness, which enhances handling and lowers stress on mounts and controls. Included items such as the glow plug, firewall mount and dedicated propeller locknut make fitting the engine more straightforward.

For experienced pilots seeking a balance of authentic sound, smooth running and usable power, the O.S. Engine FT-300 is a strong candidate for 1/4 scale projects.