How do I measure for shaft length? - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 
  #1  
Old 06-19-2008
Member
 
Join Date: Oct 2007
Location: Vancouver, Canada
Posts: 88
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 7
dhornsey is on a distinguished road
How do I measure for shaft length?

As the final stage of re-powering we're replacing our shaft and prop. I need to tell the machine shop how long to make the new shaft, but I'm not positive how to make this measurement.

The boat has a full keel with a stern hung rudder. Where should the propeller sit in the aperture? Right in the middle? Closer to the boat or the rudder? Our existing prop isn't a great guide as it's the folding type with a casing bolted right to the hull.

Any advice appreciated!! Thanks.
__________________
Pacific Seacraft Mariah 31
Reply With Quote Share with Facebook
  #2  
Old 06-19-2008
Senior Member
 
Join Date: Dec 2003
Posts: 1,385
Thanks: 1
Thanked 17 Times in 16 Posts
Rep Power: 11
capttb is on a distinguished road
Not that it's much help but the diagram attached would seem to indicate the prop has to go pretty much as far forward as possible also.Pacific Seacraft Corp. - Pacific Seacraft 31
Attached Thumbnails
How do I measure for shaft length?-rudder_skeg.jpg  
Reply With Quote Share with Facebook
  #3  
Old 06-19-2008
Wayne25's Avatar
Senior Member
 
Join Date: Jul 2006
Posts: 378
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 9
Wayne25 is on a distinguished road
On a powerboat inboard, if you have a 1" diameter shaft you should have about 3/4" between the prop hub and the skeg.
__________________
Wayne
Rehoboth Bay/Indian River, DE
S/Y KJ, Helms 25
1976 #552
Reply With Quote Share with Facebook
  #4  
Old 06-20-2008
Senior Member
 
Join Date: Sep 2003
Posts: 268
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 12
sander06 is on a distinguished road
Leave enough space for a zinc and call it good.
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Building a Rudder Newport 30 Armchairprotest Gear & Maintenance 5 04-07-2009 01:11 PM
Rule of thumb for mooring pennant length? jonlgauthier Gear & Maintenance 9 06-04-2007 10:32 AM
LWL v. Wave Length kreton General Discussion (sailing related) 1 10-08-2006 03:30 AM
Whisker Pole Length mikehoyt Racing 1 07-08-2004 08:18 AM
Displacement vs Length TADIAS General Discussion (sailing related) 5 12-16-2003 06:54 AM


All times are GMT -4. The time now is 06:18 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.