http://www.philsfoils.com/designTips.html#gybingheadthe head of the board is shaped as a trapezoid to allow the board to pivot a small amount and provide more lift. Same idea can be accomplished with a properly shaped head slot and rectangular head.
Race cheap, race faster, Damnit!
E-Scow
24' ULDB
18HT hulls plus Gcat 5.7 rig = 18GT!
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