New Propeller Slip Calcualtor
 

All, check this out...a propeller slip calculator for the iPhone and iPad....
http://itunes.apple.com/us/app/prope...459768648?mt=8

I have the Hering calculator for Android. It's free :) Neat Apps a becoming more and more available.
http://www.androidsoftware.us/Applic...alculator.html

Just tried a search on my iphone and not finding it.

You should just have to click the link that I posted... Not sure why it's not coming up... Works for me...

I searched for "propeller slip" in the App store and found it, works great.

Livorsi prop slip gauge works even better :lolhit::party-smiley-004:

X2 but the app is nice for when you just want to play with the numbers!

Purchased!

Quick couple questions though.....

1. how come none of these calculators you see on the Internet or this one take into consideration a twin vs. single setup? Wouldn't the top speed be different if you have a twin setup?

2. Along the same lines wouldn't it be important to know how many blades your running on the prop? Correct me if I am wrong but in the real world if you kept all the numbers the same (speed, pitch, WOT RPM, gear ratio and simply changed from a three blade to a four blade I don't believe the boat will run the same speed??

Thanks

Agreed... But for .99 cents... I'll take the app lol.

Good points however, single versus twin setups, the main goal is to make your prop as efficient as possible. The calculation gives you the options to manipulate the "what if's". I agree that there is more to it... IE hull condition, cat vs. Deep v, stepped v vs. Conventional, ect...

Number of blades, number of engines, hull design are not used in the equation to determine slip. Slip is measured as the overall package. These other issues influence the outcome but are not part of the algebra.

Brett

Just bought it, great find.
Thanks

Brett knows his stuff

Brett... Agreed!

so someone give me a quick schooling here......what is considered a bad or a good slip number in a 35' V.......I plugged in my variables (to the best of my knowledge) and my slip is 15.72......does that sound right ? or are my figures off.......??

That sounds right!