Scarecrow...great tip...I threw out a laundry list of very specific questions over there on rigid wing design and Steve Clark gave very specific answers to every one of them...has to be an internet first...no beating around the bush...no generalities...nothing vague...straight question...straight answer. Steve was incredibly generous with his expertise. Thank you again for the redirect.

After you promting, I have spent many, many hours of research on the net. The prospect of building a rigid wing in place of conventional mast and soft sails seems very plausible at this point, and not nearly as bazaar as it is made out to be.