The latest '91' class engine for FAI F3C competition dominated the 2005 World Championships and is likely to set the standard in competition flying over the next few years. This totally new engine has been designed from scratch as a pure helicopter engine, as is evident from the unique 'SZ' crankcase. You can be confident that the development of this engine has been made in conjunction with the world's best pilots so that you get the benefit of their immense experience too.

Displacement: 14.95cc (0.912 cu in)
Bore: 27.7mm (1.091 in.)
Stroke: 24.8mm (0.98 in.)
Practical RPM: 2,000-16,000 rpms
Power Output: 3.3PS@1500 RPM
Weight: 605g / 21.3oz (excluding muffler)

INCLUDES:
1x .91 MAX 91SZ-H Ring OS18300
1x #60M-C carb
1x OS #8 Glow Plug
1 x carburetor rubber gasket
1 x carburetor retainer assembly (M2.6x18)
1 x 0.2mm head gasket
1 x 0.1mm head gasket
1 x woodruff key
2 x 2.6x5mm Hex Head Needle Adjusting Screws
1 x Instruction Booklet
1 x OS Decal Sheet

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