Symmetrical-foil sails have been used on the "Little America's Cup" catamarans for years. They have to start with a totally symmetrical wing (unlike an airplane) and then trick it up with spoiler-flaps, elevator flaps, etc. which work BOTH sides! Something that would drive Rutan nuts!
Actually, these sails have rarely been made out of carbon fiber---mostly Mylar and simialr translucent exotics. As for me, I've got a 30 ft cutter which I'm gonna launch next year (after 15 years of "poppit yachting" while I raced on other peoples' boats). And the retro motor boat is going to depend on keeping my "supplier" convinced that the contennts of his dumpster are worthless and "unworkable". Ain't so!
I'm more interested right now in "relaunching" the BUTLER!
