The Correct Way to figure Slip Numbers . .
Thread: What is
Results 1 to 10 of 10
-
08-27-2010 06:59 PM
-
08-27-2010 08:54 PM
Tony, if no one answers here just google the formula to plug in pitch, rpm, etc. I believe that this theoretical speed is measured against actual speed and generates a slip factor. Good luck. - Jeff
People we meet in life are either a Blessing or a Lesson
-
08-27-2010 09:35 PM
Mercury racing web site has a prop slip calculator Address ishttp://www.mercuryracing.com/propellers/propslipcalculator.php
-
- Join Date
- Oct 2008
- Location
- West Michigan
- Posts
- 37,874
- Blog Entries
- 45
Getting bad advice is unfortunate, taking bad advice is a Serious matter!!
-
- Join Date
- Oct 2008
- Location
- West Michigan
- Posts
- 37,874
- Blog Entries
- 45
08-28-2010 10:30 AMHere is Marc's at BAM.....
With the formula above the calculator
http://www.go-fast.com/Prop_Slip_Calculator.htmGetting bad advice is unfortunate, taking bad advice is a Serious matter!!
-
08-28-2010 05:46 PM
Thank You ! I Think ? 83gps 30p @17 percent slip on a single guess it not to bad
-
08-28-2010 06:37 PM
subscribed
a 26 pitch prop turning one time is pose to go 26 inches
if it only goes 13 inches thats 50 % slip but you can never go more then 26 inches
they are for an estimate IMO just entertainment really
there are no figures for cupping or for the amount of blades they say add one inch for 4 blades etc
so really i would have to put in 27 p for the extra blade and .25 for a 250 rpm cup .50 for a 500 rpm etc
and i worked in a proppeller shop 5 + years
Dad was really good at playing this guessing game so its more exsperance as to how to use the numbers then just throwing in the basic numbers
-
08-30-2010 10:54 PM
You ought to be able to do better than 17% on a single engine. I went from 16 down to 10% on my 2 steped hull Donzi. Brett from bblades helped me dial mine in with his propeller test program.
-
-
09-20-2010 10:27 AM
Try this site. http://www.rbbi.com/folders/prop/propcalc.htm
I have 9.8% slip at 74mph. Maybe you need a nose cone at speeds over 80? Maybe some prop work? What is your drive depth?