its amassing to me how guys get screwed up on propeller slip I2 inches of pitch at 5200 rpm = a mile minuet less slip i think that is no way to describe how a prop works please conceder this. the queen marry at long beach ca has about a 18 inch diameter prop shaft and turns 175 rpms a min. the boat goes about 30 miles a hour. now how much pitch do we need to do that
David Bryan
My calculator doesn't go over 17 inches. Sorry!
Jeff
Somethings wrong there Dave it works out to 1.9mph. Variables in the realm of possible would be a small pecentage of 1.9 so not even close. Either the RPMs are the wrong # or theres a ratio being overlooked.. [2700Rs x 12P would be potential speed.] Besides there being a mistake Im missing the point too.
what i am trying to prove is that a propeller dose not screw it self through the water but is a pump that produces thrust like a jet and i have broken world records and won national championships to prove it
David Bryan
Looking at pictures of those props the pitch looks more than 16 foot & the stuff I read said maximum revs 200.
What was the hull speed?
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