O.S. Engine 55AX  [OSMG0556]

Increase displacement inside 40-size model the straightforward method: simply fall in a 55AX engine! You'll enjoy more horsepower for swinging bigger props ?X this means enhanced 3D, precision and sport flying. On top of that, there's no adjustments needed!

Mounts into the bolt pattern for a 46AX.

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

The 5-sided, angular head design seems great and particularly increases area area for better cooling.

Specs:

• Inventory Number: OSMG0556
• 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: 1.75 hp @ 16,000 rpm
• Body weight: 14.3 oz (404 g)
• Includes: #8 glow plug, 40J carburetor, energy Box E-3070 muffler
• Suggested Props: 12x7, 12x8, 13x6, 13x7