O.S. FS-64V (61T2) with F-4051 Silencer
O.S. FS-64V (61T2) with F-4051 Silencer
For scale/sport planes.
![Increased Stoke](https://www.horizonhobby.com/on/demandware.static/-/Sites-horizon-master/default/PDPImages/OSMG901_PP_01.jpg)
Increased Stoke
By increasing the stroke, not only propellers of 12x7-8 and 13x6 sizes, but also propellers with large loads (13x7-8, 14x6) can be used without any loss of power.
![Cylinder Design](https://www.horizonhobby.com/on/demandware.static/-/Sites-horizon-master/default/PDPImages/OSMG901_PP_02.jpg)
Cylinder Design
A newly designed cylinder head is adopted along with the increased displacement. The internal capacity of the combustion chamber has been expanded to achieve more realistic 4-stroke exhaust sound and more power.
![F-4051 Silencer](https://www.horizonhobby.com/on/demandware.static/-/Sites-horizon-master/default/PDPImages/OSMG901_PP_03.jpg)
F-4051 Silencer
The F-4051 silencer, which is a unique design of the FS-V series, has revised the internal dimensions and improved the exhaust efficiency while maintaining the comfortable 4-stroke sound.
![Drive Washer](https://www.horizonhobby.com/on/demandware.static/-/Sites-horizon-master/default/PDPImages/OSMG901_PP_04.jpg)
Drive Washer
The drive washer has been changed to a machined aluminum with a woodruff key. Additional standard equipment is set if lock nuts that prevents the propeller from coming off.