Freedom isn't free
Join Date: Jun 2007
Location: Bedford, VA
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Re: keel fairing
fairing also gives less edges for stuff to grow... but yeah, it's mostly a foil efficiency thing.
I've read that you can fair before interprotect or after, it really doesn't matter. The smoother you get the final product, the less drag it'll create. Also the better shape the overall keel has, can dramatically improve your point, and/or your sideslip. There is a pretty distinct science to getting the shape right. Depending on the boat make and model you may be able to get a keel template from a place like compu-keels to help improve the shape of your keel in the fairing process.
Oh and if a power washer took your fairing off, then it was likely time to refair anyway.
Freedom, a 1983 C&C 32 sailing Smith Mountain Lake, VA