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Old 02-02-2002, 10:02 PM
  #1
lifes a bore from shore
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what is the mathamatical formula for finding out the amount of slipping you have
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Old 02-02-2002, 10:05 PM
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Cool

I use this one.

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Old 02-02-2002, 10:09 PM
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that will work thanks
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Old 02-03-2002, 12:58 PM
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Scooter, the props are 32 pitch and the gear ratio is 1.48:1, if your calculating Scoop's slip.
 
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Old 02-04-2002, 10:41 AM
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If you don't have the above site handy. This is the formula:

rpm x pitch
------------------= speed (no slip)
1056 x gear ratio

speed (no slip) - actual speed divided by speed (no slip) then press % button on calculator.
My boat 5500 r's, 26 pitch, 1.36 drive, GPS speed = 89.7 mph.

5500 x 26
----------------= 99.57
1056 x 1.36

99.57 - 89.7 = 9.87 divided by 99.57 = 9.91%
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