BILGE KEELS

[joeysranger]

Need help designing bilge keels for 70ft X 20ft ferro-cement motorsailor. Boat is curently 8ft draft, would like to eliminate some draft if possible. Would like to know how to size keels for a given boat (L-B-D). Also keels might help with rolling (first mate dosen't like rolling). THANK YOU.

[Steve Pope]

Flopper stoppers might assist in anti rolling rather than bilge keels

[delmarrey]

Originally Posted by joeysranger

Need help designing bilge keels for 70ft X 20ft ferro-cement motorsailor.

The design is not the real problem IMHO but attaching them would be.

As for their design, I think it'll take a marine engineer to calculate their size, weight & shape in relation to your hull weight, rigging & profile. A mis-design could result in a capsize.

[nautical62]

As someone who owned a bilge keel boat for years, I did love the shallower draft, but I don't think you can expect any notable decrease in rolling.