HPBCANADA.COM • View topic - **** Prop Slip Calculator ****

p man wrote:

Maybe some will disagree but....
Thinking about slip % is waaay over rated. It's not a simple thing as props have progressive pitch, are never accurate in their marked pitch and slip can change based on as little as which way you part your hair.

Best you can do is start with some good advise for a setup and test test test from there.
I'm often wrong though so.....

I think it's mostly used to call out BS speeds posted on the old interwebs..

The only number that really matters is the gps...like Pat mentioned the props may or may not be accurately marked, your tach isn't likely 100% accurate...so it's hard to compare slip numbers from one boat to the next or even prop to prop.

Once you've texted your props and setup and found your fastest combo then calculate you slip so you can sound smart when you're drinking beer with your buddies lol.

Testing, and denial and error setup changes are the way to go.

But some folks like to geek out. Especially if you have a measured, or trusted pitch number..

Some people.. do neither! :shock:

mattmak wrote:

Testing, and denial and error setup changes are the way to go.

But some folks like to geek out. Especially if you have a measured, or trusted pitch number..

Some people.. do neither! :shock:

Most of my boating career has been denial and error lol.

Don't get me wrong..its a fun number for sure. It can help diagnose a setup issue once you have an established base line...like when I switched to my first 3.1 and lost mph because of a shitty nose cone (same props, same tach, same boat). It's just not something you can compare with someone else really because there's too many variables.

DoktorC wrote:

mattmak wrote:

Testing, and denial and error setup changes are the way to go.

But some folks like to geek out. Especially if you have a measured, or trusted pitch number..

Some people.. do neither! :shock:

Thats cool, just trying to learn as much as I can. Def not afraid to test either

MarkStein wrote:

DoktorC wrote:

mattmak wrote:

Testing, and denial and error setup changes are the way to go.

But some folks like to geek out. Especially if you have a measured, or trusted pitch number..

Some people.. do neither! :shock:

Thats cool, just trying to learn as much as I can. Def not afraid to test either

I also like to hear myself speak on the interwebs...so there's that too..

MarkStein wrote:

DoktorC wrote:

mattmak wrote:

Testing, and denial and error setup changes are the way to go.

But some folks like to geek out. Especially if you have a measured, or trusted pitch number..

Some people.. do neither! :shock:

Thats cool, just trying to learn as much as I can. Def not afraid to test either

I also like to hear myself speak on the interwebs...so there's that too..

DoktorC wrote:

Rick, you know you can get an accurate tach that reads over 7000 for like $25..
In fact I heard LC's reads to 14,500rpm.

When you only run your boat once a year it's tough to establish a base line LOL

Author:	MarkStein [ February 9th, 2019, 10:19 pm ]
Post subject:	Re: ** Prop Slip Calculator **
DoktorC wrote: p man wrote: Maybe some will disagree but.... Thinking about slip % is waaay over rated. It's not a simple thing as props have progressive pitch, are never accurate in their marked pitch and slip can change based on as little as which way you part your hair. Best you can do is start with some good advise for a setup and test test test from there. I'm often wrong though so..... I think it's mostly used to call out BS speeds posted on the old interwebs.. The only number that really matters is the gps...like Pat mentioned the props may or may not be accurately marked, your tach isn't likely 100% accurate...so it's hard to compare slip numbers from one boat to the next or even prop to prop. Once you've texted your props and setup and found your fastest combo then calculate you slip so you can sound smart when you're drinking beer with your buddies lol. lol thanks

Author:	mattmak [ February 12th, 2019, 11:00 am ]
Post subject:	Re: ** Prop Slip Calculator **
Testing, and denial and error setup changes are the way to go. But some folks like to geek out. Especially if you have a measured, or trusted pitch number.. Some people.. do neither!

Author:	DoktorC [ February 12th, 2019, 11:28 am ]
Post subject:	Re: ** Prop Slip Calculator **
mattmak wrote: Testing, and denial and error setup changes are the way to go. But some folks like to geek out. Especially if you have a measured, or trusted pitch number.. Some people.. do neither! Most of my boating career has been denial and error lol. Don't get me wrong..its a fun number for sure. It can help diagnose a setup issue once you have an established base line...like when I switched to my first 3.1 and lost mph because of a shitty nose cone (same props, same tach, same boat). It's just not something you can compare with someone else really because there's too many variables.

Author:	MarkStein [ February 12th, 2019, 11:30 am ]
Post subject:	Re: ** Prop Slip Calculator **
DoktorC wrote: mattmak wrote: Testing, and denial and error setup changes are the way to go. But some folks like to geek out. Especially if you have a measured, or trusted pitch number.. Some people.. do neither! Most of my boating career has been denial and error lol. Don't get me wrong..its a fun number for sure. It can help diagnose a setup issue once you have an established base line...like when I switched to my first 3.1 and lost mph because of a shitty nose cone (same props, same tach, same boat). It's just not something you can compare with someone else really because there's too many variables. Thats cool, just trying to learn as much as I can. Def not afraid to test either

Author:	DoktorC [ February 12th, 2019, 11:37 am ]
Post subject:	Re: ** Prop Slip Calculator **
MarkStein wrote: DoktorC wrote: mattmak wrote: Testing, and denial and error setup changes are the way to go. But some folks like to geek out. Especially if you have a measured, or trusted pitch number.. Some people.. do neither! Most of my boating career has been denial and error lol. Don't get me wrong..its a fun number for sure. It can help diagnose a setup issue once you have an established base line...like when I switched to my first 3.1 and lost mph because of a shitty nose cone (same props, same tach, same boat). It's just not something you can compare with someone else really because there's too many variables. Thats cool, just trying to learn as much as I can. Def not afraid to test either I also like to hear myself speak on the interwebs...so there's that too..

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** Prop Slip Calculator ** http://www.hpbc.ca/viewtopic.php?f=19&t=912	Page 3 of 4

Author:	LittleCharger [ February 12th, 2019, 12:24 pm ]
Post subject:	Re: ** Prop Slip Calculator **
DoktorC wrote: MarkStein wrote: DoktorC wrote: mattmak wrote: Testing, and denial and error setup changes are the way to go. But some folks like to geek out. Especially if you have a measured, or trusted pitch number.. Some people.. do neither! Most of my boating career has been denial and error lol. Don't get me wrong..its a fun number for sure. It can help diagnose a setup issue once you have an established base line...like when I switched to my first 3.1 and lost mph because of a shitty nose cone (same props, same tach, same boat). It's just not something you can compare with someone else really because there's too many variables. Thats cool, just trying to learn as much as I can. Def not afraid to test either I also like to hear myself speak on the interwebs...so there's that too.. When you only run your boat once a year it's tough to establish a base line LOL

Author:	mattmak [ February 12th, 2019, 8:01 pm ]
Post subject:	Re: ** Prop Slip Calculator **
DoktorC wrote: Most of my boating career has been denial and error lol. Don't get me wrong..its a fun number for sure. It can help diagnose a setup issue once you have an established base line...like when I switched to my first 3.1 and lost mph because of a shitty nose cone (same props, same tach, same boat). It's just not something you can compare with someone else really because there's too many variables. Rick, you know you can get an accurate tach that reads over 7000 for like $25.. In fact I heard LC's reads to 14,500rpm.

Author:	DoktorC [ February 12th, 2019, 8:09 pm ]
Post subject:	Re: ** Prop Slip Calculator **
mattmak wrote: DoktorC wrote: Most of my boating career has been denial and error lol. Don't get me wrong..its a fun number for sure. It can help diagnose a setup issue once you have an established base line...like when I switched to my first 3.1 and lost mph because of a shitty nose cone (same props, same tach, same boat). It's just not something you can compare with someone else really because there's too many variables. Rick, you know you can get an accurate tach that reads over 7000 for like $25.. In fact I heard LC's reads to 14,500rpm. Yup...I have a digitron inductive tach. That doesn't mean that everyone else's is accurate though...or for that matter the $25 tiny tach may or may not be accurate....how do we know???

Author:	DoktorC [ February 12th, 2019, 8:14 pm ]
Post subject:	Re: ** Prop Slip Calculator **
LittleCharger wrote: When you only run your boat once a year it's tough to establish a base line LOL I do it for consistency...nothing changes...motor doesn't wear..etc. Maybe you should come visit more often lol.

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