what % of h.p lost between crank, and prop.
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I know, I was really shocked with that number as well. My Formula is around 16% slip. The liberator has a shallower V though, it's 21 vs a 24 degree bottom. I'm sure this helps a lot. When I run the numbers that Four Winns lists which is 58 mph @ 5000 rpms with a 20 pitch raker I come up with 12% which is still good.
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Join Date: Feb 2011
Location: cadillac michigan
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Never seen one that low, I am at 9.8% and that is pretty good. Double check your gear ratio, here is a site that may help you out http://www.rbbi.com/folders/prop/propcalc.htm