Advice on glassing in wood keel spacer block - Page 4 - SailNet Community
LinkBack Thread Tools
post #31 of 36 Old 08-03-2010
Senior Member
Join Date: Jun 2004
Location: West Michigan
Posts: 515
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 13
Almost looks as though someone switched the keel out and used the wood to match up the different profiles of the stub and keel. (as you'd do with wood to mount a winch on a mast)

Would like to see a lines drawing of the boat as designed to compare.

Take it that dropping the keel and completely encapsulating the wood is not a viable option?
merc2dogs is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
post #32 of 36 Old 08-10-2010 Thread Starter
Junior Member
Join Date: Jan 2007
Posts: 21
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
I contacted the builder and also the mast designer about this construction - and here's the real scoop on it

From the mast designer:
The keel was likely designed that way because these boats were built over male forms. The keel stub--the wood part--was likely NOT part of those forms. Yet, the keel serves two functions--it has to hold the ballast down low for appropriate stability, and it has to have enough area to balance the loads from the rig. If you had a keel that was just the lower ballast part without the wood spacer, it would not have enough profile area, and the ballast would be too high up--center of gravity too high. Or, if you made the wood part also out of lead, there would be too much ballast. Or, if you reduced the thickness of the solid lead keel blade, it may be too thin, and the ballast weight would not be low enough. In a normal female molding process, that wood stub would be made out of fiberglass and the inside would be hollow and a deep sump. In this case, because there was no female mold and the stub was not included in the fiberglass hull molding, the next logical form of construction is a wood spacer with the ballast part attached below that.

From the builder:
Yes the wood spacer is to lower the CG of the keel. The structural integrity of the hull is simpler and better without a sump or the lead being poured down into a glass shaped keel. You can hit something down low in the lead or up high in the wood and your will have an easily repairable ding.
bigwalt is offline  
Quote Quick Reply Share with Facebook
post #33 of 36 Old 08-11-2010
Handsome devil
Stillraining's Avatar
Join Date: Jan 2008
Location: LaConner,Washington
Posts: 3,477
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 12
interesting....glad I didn't vote...I would have been wrong as well...

"Go Simple...Go Large"

Relationships are everything to me..everything else in life are just tools to enhance them.

The purchase price of a boat is just the admittance fee to the still have to spend money on the court one with something going for her with pleasing and desirable character traits others desire as well... or you could find yourself in a disillusioned relationship contemplating an expensive divorce.
Stillraining is offline  
Quote Quick Reply Share with Facebook
post #34 of 36 Old 08-11-2010
Senior Member
Gene T's Avatar
Join Date: May 2006
Location: Left Coast USA
Posts: 666
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 12
Thanks for the update, nice to know.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Currently in Long Beach, CA
Gene T is offline  
Quote Quick Reply Share with Facebook
post #35 of 36 Old 04-10-2011
Deric's Avatar
Join Date: Feb 2008
Posts: 53
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 10
Any updates on your boat?

Hey Walt,

How far along are you with your boat? You mentioned you own 1 of 2 made and was wondering if you were able to learn anything more about your boat.

I have a Herreshoff Cat Ketch 33 by CKY and there is no design such as yours. Perhaps the larger cat ketches had such changes. There were many 31 footers, but the larger boats were rare, most likely the cost made it so.
Deric is offline  
Quote Quick Reply Share with Facebook
post #36 of 36 Old 04-10-2011
Senior Member
fallard's Avatar
Join Date: Nov 2009
Location: Mystic
Posts: 1,610
Thanks: 3
Thanked 47 Times in 46 Posts
Rep Power: 8
Halsey Herreshoff is at the Herreshoff Museum in Bristol, RI. (Herreshoff Marine Museum & America's Cup Hall of Fame) and ought to have an opinion on your project.
fallard is online now  
Quote Quick Reply Share with Facebook

Quick Reply

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:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


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
Show Printable Version Show Printable Version
Email this Page Email this Page

Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome