Notices

your slip

Old 07-30-2008, 05:10 PM
  #1  
Platinum Member
Platinum Member
Thread Starter
 
Ptufaro's Avatar
 
Join Date: May 2003
Location: Metairie, La.
Posts: 667
Likes: 0
Received 0 Likes on 0 Posts
Default your slip

I am wonder if anyone knows the slip ratios on their Eliminator.
I have a 30' an it seems to have about 12 to 13 percent slip at wot.





T.S. = Engine RPM / Gear Ratio * Prop Size / 1056
Example:
T.S. = (5500 RPM / 1.36) x (34"/1056) = 130.2 MPH
Ptufaro is offline  
Old 07-30-2008, 07:48 PM
  #2  
Registered
 
Join Date: Jun 2007
Location: Osage Beach, MO
Posts: 963
Likes: 0
Received 8 Likes on 5 Posts
Default

Thats what mine is as well.
13%
1.36 drives 30 pitch prop 5200 rpms 94.5 mph


according to this anyway.
http://www.rbbi.com/folders/prop/propcalc.htm
not sure how accurate it is.
QWKRN U is offline  
Old 07-30-2008, 07:51 PM
  #3  
Registered
 
MikaylaHunterCig's Avatar
 
Join Date: Oct 2003
Location: Pacific / Havasu
Posts: 547
Likes: 0
Received 0 Likes on 0 Posts
Default

My 28 w/ 32p @ 105mph , 5100 rpm is about 8%
We try (Heringpropellers.com) to set up most cats at 8% or less. However there are many factors involved when setting this formula up but in any case 12% is not bad but can be improved a bit.
MikaylaHunterCig is offline  
Old 07-30-2008, 10:49 PM
  #4  
Platinum Member
Platinum Member
Thread Starter
 
Ptufaro's Avatar
 
Join Date: May 2003
Location: Metairie, La.
Posts: 667
Likes: 0
Received 0 Likes on 0 Posts
Default

MikaylaHunterCig are you running a 5 blade to get lower slip
I run 34 4 blade mercs 1:25 @ 5800. I am a bit worried about going to a 5 blade and breaking drives all the time. As of now i have been fortunate to have only broken 1 in the last 100hrs.
Ptufaro is offline  
Old 07-31-2008, 08:03 PM
  #5  
Registered
 
Join Date: Nov 2007
Location: DALE HOLLOW LAKE, TN
Posts: 93
Likes: 0
Received 0 Likes on 0 Posts
Default

my 26 is about 14

Hope to improve on that ,STILL working out bugs. Hope to be able to use it this year
orange26daytona is offline  
Old 08-04-2008, 05:13 PM
  #6  
Registered
 
Join Date: Jun 2005
Location: IL
Posts: 260
Likes: 0
Received 0 Likes on 0 Posts
Default

40 pitch 8% slip @137mph
38 pitch 7% slip @131mph
Merc 5 blade CNC's NXT drives.
Also once the boat hits about 110 we start to trim down and watch the needle grow. Roosters tails are sort of a sort of a sign of slip once you achieve max lift and speed trim in and your slip drops. I think alot of us over trim. It was hard to believe it until we tried it then the gps started climbing. We Still through a huge rooster until 100 or so then flattens off.
B BOATER is offline  
Old 08-04-2008, 10:56 PM
  #7  
Registered
 
MikaylaHunterCig's Avatar
 
Join Date: Oct 2003
Location: Pacific / Havasu
Posts: 547
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by Ptufaro
MikaylaHunterCig are you running a 5 blade to get lower slip
I run 34 4 blade mercs 1:25 @ 5800. I am a bit worried about going to a 5 blade and breaking drives all the time. As of now i have been fortunate to have only broken 1 in the last 100hrs.
Nope - lab 4 blade but on your application a set of hering 5-blades could make a few MPH diffrence.
My boat has 2x 496 mag HO motors with a high x and imco short drives. - i do plan to play with some props in the near future so we'll see what it can actually do .
MikaylaHunterCig is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
ENFORCER24
General Q & A
15
03-20-2007 12:30 PM
docmanrich37
General Q & A
6
12-18-2006 11:04 AM
thedonz
General Boating Discussion
1
06-05-2006 09:16 AM
docmanrich37
General Q & A
3
03-11-2006 05:41 PM
Scooter
General Boating Discussion
4
02-04-2002 09:41 AM

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Quick Reply: your slip


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.