Join Date: Feb 2000
Location: Annapolis, Md
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Re: tacking angle
The shoal draft just doesn't have the surface area to generate the lift.
To be more accurate, the shoaler draft keel does not have the efficiency to generate equal lift to an equal-area, higher-aspect ratio, equal foil section, keel and the shoal keel will generate more drag if given a large enough area to provide equal lift at an equal speed. Drag of course is one of the big controlling elements in the ability to maximize VMG to windward at any particular wind and wave condition.
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Curmudgeon at Large- and rhinestone in the rough, sailing my Farr 11.6 on the Chesapeake Bay