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Old 29th October 2007, 02:24 PM   #13
Join Date: Aug 2006
Posts: 329


just to better explain your concept of "sideways moving". Actually, when a board is going, there is always a component of sideways movement. If that wasn't there, the fin simply would not work, or just act as a dragging device. That "sideways component", which in fact explains angle of attack, is higher when pushing hard against the fin and lower when going deep downwind and/or sheeting out the sail. Rails (at least in the tail) are actually almost continuously engaged.
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