The 'F' model is our largest propeller - designed for larger two-stroke engines that use the higher gear reduction ratios and horsepower up to 115. This prop blade runs beautifully on a Rotax 503/3.47 as a three blade 66" to 70". A two place Kolb can't squeeze any more efficiency out of a 503/3.47 than with our F-model 68" prop. This prop is also the finest prop available for the Rotax 912, 912S, and 914 series engines and is the exclusive prop of Skyrunner.
Diameter Range: Minimum: 48" <> Maximum 75""
Speed Range: 22 - 95 knots / 25 - 110 mph
Retail Price: $249 USD per blade