for sport, but engineered for excellence, the .91 FX
offers the power and user-friendly features of other FX Series
engines in a displacement fit for large-scale aircraft.
The .91 FX neatly bridges the power gap between .60-size
glow engines and gas engines, by offering the easy
familiarity of glow technology combined with the added
power that today's large-scale modelers demand. With its
top output of 2.8 bhp, the .91 FX can put a large-scale
plane through its paces with ease. And with O.S.'
meticulous testing and design behind it, large-scale
pilots can fly the best in long-term dependability.
remote-mounted needle valve design offers greater
flexibility and safety for the pilot. The needle
valve can be positioned upright or to the side to
avoid cowl modifications and preserve scale looks.
Coarse threads and
an O-ring seal on the needle valve minimize
settings creep over time due to vibration and air
leaks, providing more flights with fewer
crankshaft and locknut assembly offer more thread
length for better prop nut engagement and more
safety for pilots and onlookers.
A lower crankcase
profile leaves room for more head height and
cooling fins-semi-squared head design further
enhances cooling capacity and performance.
Dual bearing design
includes a larger front bearing for added
durability and smoothness
Safety Propeller Locknut Assembly, #8 glow plug