O.S. Engine 91FX  [OSMG0591]

Made for sport, but engineered for quality, the 91FX provides the power and user-friendly top features of other FX Series machines in a displacement fit for large-scale aircraft. The 91FX neatly bridges the energy space between .60-size radiance machines and fuel engines, by offering the straightforward familiarity of glow technology combined with the added energy 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. Sufficient reason for O.S.' careful evaluation and design behind it, large-scale pilots can fly the best in long-lasting reliability.

Coarse threads and an O-ring seal regarding the needle valve minimize settings creep in the long run because of vibration and atmosphere leakages, providing more flights with fewer adjustments.

Extra-long crankshaft and locknut construction offer more thread length for better prop nut engagement and more security for pilots and onlookers.

A diminished crankcase profile renders space for more mind height and air conditioning fins-semi-squared head design further enhances air conditioning ability and gratification.

Dual bearing design includes a more substantial front bearing for additional durability and smoothness.

The best energy plant for many Top FliteR Gold Edition Kits

SPECIFICATIONS

• Stock Quantity: OSMG0591
• Displacement: 0.912 cu in (15.0 cc)
• Bore: 1.091 in (27.7 mm)
• Stroke: 0.976 in (24.8 mm)
• Practical rpm: 2,000-16,000
• Output: 2.8 hp @ 15,000 rpm
• Weight: 19.3 oz (550 g)
• Includes: Muffler, Safety Propeller Locknut Assembly, #8 radiance plug
• Needs: fuel, mount & prop
• Suggested Props: 13x8, 13x9