If I calculate right, a wing sail with slot like wild turkey doesn't need a spin. With a slot (like flaps on an airplane) the wing can develop say 2 1/2 times the standard wing lift before stalling (with a lot of drag, which is ok off the wind). This would be enough to pitch pole even with a 25' rig at about 12 mph true wind. Sounds like a winner to me. Am I right? Bill?
