O.S. FS-64V with F-4051 Silencer for Scale and Sport Planes (OSMG901)

The OS FS-64V engine with F-4051 Silencer is a high‑performance powerplant designed for scale and sport RC airplanes. By increasing stroke and displacement, it delivers stronger power and supports larger propellers—such as 12x7-8 and 13x6—without sacrificing performance, while the F-4051 silencer provides a refined, realistic 4-stroke exhaust note.

Key design updates include a redesigned cylinder head that expands the combustion chamber for more power and a more authentic exhaust, and the F-4051 silencer—part of the FS‑V family—delivering improved exhaust efficiency while preserving the characteristic 4-stroke tone. The drive washer is machined aluminum with a woodruff key, and lock nuts help secure the propeller during flight.