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OS 55AX Nitro Engine OS

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OS 55AX Nitro Engine OS

Availability: In stock


Availability: In stock

Only 2 left



More muscle for .40 sized airplanes.

Increase displacement in your 40-size model the easy way: just drop in a 55AX engine!

You'll enjoy more horsepower for swinging bigger props ™ which means improved 3D, precision and sport flying. Best of all, there's no modifications required!

Mounts directly into the bolt pattern for a 46AX.

A diagonally-placed needle eliminates the need for a remote needle valve.

The 5-sided, angular head design looks great and significantly increases surface area for better cooling.

The Power BoxTM muffler has a generous sized chamber and larger sound baffle to significantly reduce exhaust noise without stealing power.

ABL (Advanced Bimetallic Liner) uses two O.S.-developed alloys to provide a durable barrier between the brass liner and piston.

Stock Number: 15612
Displacement: 0.545 cu in (9 cc)
Bore: 0.91 in (23 mm)
Stroke: 0.85 in (21.5 mm)
Practical rpm: 2,000-17,000
Output: 1.68 hp @ 16,000 rpm
    14.3 oz (404 g) w/o muffler
    18.52 oz (525 g) w/ muffler
Includes: #8 glow plug, E-3071 Power Box muffler & needle valve extension
Recommended Props: 11x6, 11x7, 12x6, 12x7, 12x8 & 13x6