Reply
 
Thread Tools Search this Thread
 
Old 15 July 2006, 13:10   #11
BVR
Member
 
Country: UK - England
Boat name: Old Rib
Make: Dunlop
Length: 5m +
Engine: Mercury 500 OB 2T
Join Date: Jul 2006
Posts: 1
The standard formula to use is Square root of (Weight in tons x HP ) x Constant = Speed in Knots. The constant for a planning hull is probably between 2.5 to 3
So if you know the all up weight (include absolutely everything ) of you rib and given that you will know your existing top speed and hp you can determine the constant for your boat. So then you change the hp to give the speed you want. Easy with a spreadsheet. All a bit theoretical I know but will give you a decent result to start from and you can play with the HP to get any ( within reason) speed you want.

www.reesmarine.com
__________________

__________________
BVR is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 Off
Pingbacks are Off
Refbacks are Off





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 06:14.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.