O.S. Engine OSMG0591 91FX Precision Glow Powerplant  [OSMG0591]

Precision Glow Power from the OSMG0591 91FX

Model pilots seeking dependable high output in a glow format will appreciate the O.S. Engine OSMG0591 91FX. It combines a 2.8 horsepower rating with design choices aimed at steady, repeatable performance for large-scale aircraft.

Positioning of the 91FX in Your Fleet

The 91FX is targeted to close the gap between .60-size glow units and bulkier gas engines, keeping the convenience of glow systems while offering boosted performance for larger airframes. The engine has been refined to provide consistent running across many sorties.

Engineering Points to Note

The needle valve on the 91FX features coarse threads with an O-ring seal to reduce drift from vibration and small air leaks, helping retain your tuned settings. The extra-long crankshaft with a locknut assembly improves prop retention and safety during aggressive flight.

The semi-squared head profile and improved crankcase contour increase cooling efficiency for longer runs. A dual bearing layout, including a larger front bearing, enhances service life and smooth rotation.

The O.S. Engine OSMG0591 91FX is a practical step up for modellers who want enhanced performance without the complications of gas conversions. Its robust build and cooling focus make it suitable for demanding large-scale use.