Join Date: Feb 2000
Location: Annapolis, Md
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Traditionally, for the purposes of calculating SA/D, cutters are calculated like sloops, in other words using 100% foretriangle.
That said I have seen calcs that use 100% fore triangle plus 100% size of the staysail for the published sail area and I understand that Island Packets SA/D is calculated using the area of a genoa. For the purpose of SA/D and center of effort calcs, sails are always calculated as straight edged, ignoring roach or hollow.