Cutting the keel??? - 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 03-31-2010
Member
 
Join Date: Jan 2010
Posts: 69
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 5
jwreck is on a distinguished road
Cutting the keel???

Is this really done? Is it even remotely cost effective? How bad does it mess with a boat's performance?
Reply With Quote Quick reply to this message Share with Facebook
  #2  
Old 03-31-2010
mitiempo's Avatar
Senior Member
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 7,280
Thanks: 0
Thanked 77 Times in 68 Posts
Rep Power: 8
mitiempo will become famous soon enough mitiempo will become famous soon enough
Why on earth would you ever want to cut a keel? If much weight is taken off the boat will not be able to stand up to its sail area as designed. If a boat was to be so modified it should be after a redesign by a respected naval architect.
Cost effective? How?
__________________
Brian
Living aboard in Victoria Harbour

Last edited by mitiempo; 03-31-2010 at 07:52 PM. Reason: add
Reply With Quote Quick reply to this message Share with Facebook
  #3  
Old 03-31-2010
deniseO30's Avatar
1934 Chickering
 
Join Date: Nov 2006
Location: Bristol pa
Posts: 6,336
Thanks: 52
Thanked 100 Times in 90 Posts
Rep Power: 10
deniseO30 will become famous soon enough deniseO30 will become famous soon enough
yet many older center board/drop keel cruisers have the slot filled in because the owners don't/won't/can't/don't know how to deal with it. Which to me translates as the same thing.
__________________
Denise, Bristol PA, Oday 30. On Tidal Delaware River, Anchor Yacht Club. New Website!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

My boat is for sale.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Quick reply to this message Share with Facebook
  #4  
Old 03-31-2010
PeterSailer's Avatar
Bathurst NB
 
Join Date: Mar 2010
Location: Bathurst NB
Posts: 183
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 5
PeterSailer is on a distinguished road
Yes it has been done.
check out there links...
MarsKeel Technology Keel Draft Reductions

http://www.marskeel.com/fckeditor/us...ng%20World.pdf
__________________
I hate storms, but calms undermine my spirits." - Bernard
Reply With Quote Quick reply to this message Share with Facebook
  #5  
Old 03-31-2010
TQA's Avatar
TQA TQA is offline
Bombay Explorer 44
 
Join Date: Apr 2009
Posts: 2,694
Thanks: 0
Thanked 59 Times in 55 Posts
Rep Power: 6
TQA is on a distinguished road
CSY 44s were designed to be able to slice off the bottom foot of the keel.

The idea was after they were finished chartering they could have their draft reduced for Florida / Bahamas sailing.
Reply With Quote Quick reply to this message Share with Facebook
  #6  
Old 03-31-2010
mitiempo's Avatar
Senior Member
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 7,280
Thanks: 0
Thanked 77 Times in 68 Posts
Rep Power: 8
mitiempo will become famous soon enough mitiempo will become famous soon enough
Peter
Shortening a keel and bolting on torpeedo shaped lead to it is a lot different than just cutting 500 or 1000 lbs off. As well with shallower draft there would have to be more ballast than there was originally in a deeper keel to maintain the same stability.

Denise
Eliminating an unballasted centerboard will affect pointing ability but not stability. If it is a heavily ballasted centerboard that is removed it will change stability. If the ballasted board is just kept in the slot it is no different than forgetting to lower it. While not as low the weight is still there.

TQA
The key word is "designed".

jwreck
Exactly what are you planning to do?
__________________
Brian
Living aboard in Victoria Harbour

Last edited by mitiempo; 03-31-2010 at 08:27 PM. Reason: add
Reply With Quote Quick reply to this message Share with Facebook
  #7  
Old 03-31-2010
PeterSailer's Avatar
Bathurst NB
 
Join Date: Mar 2010
Location: Bathurst NB
Posts: 183
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 5
PeterSailer is on a distinguished road
Quote:
Peter
Shortening a keel and bolting on torpeedo shaped lead to it is a lot different than just cutting 500 or 1000 lbs off. As well with shallower draft there would have to be more ballast than there was originally in a deeper keel to maintain the same stability.
It says the exact same thing in the second link I posted.

For obvious reason you can't cut off 500-1000lbs of lead off your keel without adding a bulb... But it's possible to reduce draft.
__________________
I hate storms, but calms undermine my spirits." - Bernard
Reply With Quote Quick reply to this message Share with Facebook
  #8  
Old 03-31-2010
mitiempo's Avatar
Senior Member
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 7,280
Thanks: 0
Thanked 77 Times in 68 Posts
Rep Power: 8
mitiempo will become famous soon enough mitiempo will become famous soon enough
Which leaves us wondering exactly what jwreck has in mind. His question was pretty vague.
__________________
Brian
Living aboard in Victoria Harbour
Reply With Quote Quick reply to this message Share with Facebook
  #9  
Old 03-31-2010
Senior Member
 
Join Date: Jul 2008
Location: chesapeake bay
Posts: 1,942
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 7
scottyt is on a distinguished road
my 83 hunter 27 is a shoal keel the keel weighs 3300 lbs and my draft is 3'3" the true fin keel is a foot deeper and 200 lbs lighter

just for comparison

less depth more weight to offset the leverage the keel has lost with length
Reply With Quote Quick reply to this message Share with Facebook
  #10  
Old 03-31-2010
mitiempo's Avatar
Senior Member
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 7,280
Thanks: 0
Thanked 77 Times in 68 Posts
Rep Power: 8
mitiempo will become famous soon enough mitiempo will become famous soon enough
Exactly right, scotty. The same with my CS27 deep vs shoal and any other design I know of.
__________________
Brian
Living aboard in Victoria Harbour

Last edited by mitiempo; 03-31-2010 at 09:56 PM. Reason: add
Reply With Quote Quick reply to this message Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




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
My First Boat...Boat Term Question... Kacper General Discussion (sailing related) 38 09-23-2008 07:52 PM
Wing, fin, or bulb...what are the trade offs? langousta Gear & Maintenance 17 09-17-2008 05:54 PM
reducing keel/adding fin? abacosol Gear & Maintenance 9 07-01-2007 10:32 PM
Keel Bolt Repairs Don Casey Gear and Maintenance Articles 0 11-10-2003 08:00 PM
Keel Bolt Concerns Don Casey Gear and Maintenance Articles 0 10-12-2003 09:00 PM


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

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.