SailNet Community - View Single Post - Modified Centerboard
View Single Post
post #2 of Old 06-30-2005
Jeff_H's Avatar
Join Date: Feb 2000
Location: Annapolis, Md
Posts: 6,996
Thanks: 5
Thanked 170 Times in 139 Posts
Rep Power: 10
Modified Centerboard

Traditionally, catboats were heavily ballasted with either internal ballast or else a cast lead keel through which the centerboard was lowered. This gave them some degree of stability at low to moderate heel angles. While some Catboats used steel plate centerboards in most cases the centerboards themselves were just ballasted enough to sink when lowered and added nothing to the stability of the boat.

You can''t add a bulb to a hinged center board because you would be dragging the bulb sidewards through the water when the centerboard was partially raised.

Which now brings us gotten back to what I had originally been suggesting, in the "Best Hull Type" discussion, which is essentially a daggerboard with a bulb which would give you both the stability and sailing ability of a fin keel, with the shoal draft of a centerboarder. Daggerboards lift vertically rather than hinge so that the bulb always stays level. It is not all that difficult to design a daggerboard with a bulb that would work well. While a Tripp 26 or a Meleges 24r in no other way resembles what you are proposing to build, and they are far more sophisticated than you are proposing or even need, you might look at some pictures of the Tripp 26

or Melges 24 atname=24%27+Melges+Melges+24&photo_name=Picture+% 231&photo=1&url=

to see what this arrangement looks like.

The only problem with either a centerboard or a dagger board with a bulb is the space that they occupy within the cabin of the boat.

Gotta Go,
Jeff_H is online now  
Quote Share with Facebook
For the best viewing experience please update your browser to Google Chrome