Prop Slip Calculator

[Largemouthlou]

I know some of you guys already use this one, but for those that don't plug in your #ers!!

http://www.go-fast.com/Prop_Slip_Calculator.htm

Louis

[fishfarm]

I know some of you guys already use this one, but for those that don't plug in your #ers!!

http://www.go-fast.com/Prop_Slip_Calculator.htm

Louis

Hey Lou I'm a Little lost with this. Can you help me out. 24p Razor XL4 at 5900 r's and 70/71 gps 1.75 gears

[Bullet Bling]

U got 9%

[fishfarm]

is that good. I'm trying a Razor 3 next

[Bullet Bling]

Yes anything over 12 in my book there is a problem

[sowenssw]

Below is what I have always used to calc prop slip:

RPM X Prop pitch =
1056 x gear ratio =

Example:
6500 rpm x 28 pitch = 182,000
1056 x 1.75 = 1848

182,000 divided by 1848 = 98.48 mph "theoretic speed" sub track actual gps speed from theoretic speed and thats the % or efficiency loss.

[Htnbuks]

So I came into this post a little late. My numbers are greatly off, as I come up with a neg number. -1.62???
21.5 pitch
5800 rpms
48 mph
2.50.1 gear ratio

[KenHo]

An update on the link in first post - it's broken. Here's a current active link: https://www.go-fast.com/Knowledge-ba...lip-calculator