SailNet Community - View Single Post - Bolt on Keel
Thread: Bolt on Keel
View Single Post
  #22  
Old 08-16-2013
Jeff_H's Avatar
Jeff_H Jeff_H is offline
Moderator
 
Join Date: Feb 2000
Location: Annapolis, Md
Posts: 6,681
Thanks: 5
Thanked 105 Times in 81 Posts
Rep Power: 10
Jeff_H has a spectacular aura about Jeff_H has a spectacular aura about Jeff_H has a spectacular aura about
Re: Bolt on Keel

Quote:
Originally Posted by Tim R. View Post


From a design standpoint, what would have to be done to make an encapsulated keel better?

Glass over the top of the ballast? Create an impact zone of additional fiberglass at the leading edge? What else?
If I wanted to create an encapsulated keel that was as sturdy as a properly engineered bolt on keel, I would have cast ballast, keel bolts, as thick a membrane above the ballast as the keel area of the hull, and then have same system of tranverse and longituninal frames capable of distributing keel loads. The rule of thumb is that the glass in the keel area is approximately twice the thickness of the hull below the waterline. At that point the encapsulation becomes structurally irrelevant. The problem with that set up is that there is no way to change the keel bolts.

And...For what it is worth, unless you have a keel stepped mast, there should not be water in your bilge whether you have a bolt on keel or a encapsulated keel. With the exception of my Folkboat whose keel bolts could no longer be considered bolts before I replaced them, worst keel leaks that I have tried to repair was on boats with encapsulated keels where there was water in the encapsulation so that there was not good way to get a repair that did not have pin holes letting water in.

Jeff
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Curmudgeon at Large- and rhinestone in the rough, sailing my Farr 11.6 on the Chesapeake Bay
Reply With Quote Share with Facebook