Submitted by keithmelville Tue, 2004-04-13 17:37
FOILFoil is the change in thickness of a board from the nose to the tail, or of a fin from the leading edge to the trailing edge. See S deck. More technically, a Foil is a device that provides reactive forces when in motion relative to a surrounding fluid; foils can be accurately described by their chord, camber, thickness, and thickness distribution.
Can also refer to curved surfaces of a fin;
http://www.swaylocks.com/images/glossary/uploads/finz1.jpg
*Note that the center fin is foiled both sides, the side fins are foiled on one side*
