Designed for sport, but engineered for excellence, the 91FX offers the power and user-friendly features of other FX Series engines in a displacement fit for large-scale aircraft. The 91FX 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 hp, the 91FX 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.
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 adjustments.
Extra-long 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.
The ideal power plant for most Top FliteR Gold Edition Kits
SPECIFICATIONS
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