just posted on sailing anarchy:

http://www.youtube.com/watch?feature=player_embedded&v=8dn65wQWb5A
http://www.onesails.com/wingsails.php
http://www.omerwingsail.com

does anyone recognize the hull in the youtube video? custom made for an unstayed mast perchance, or did they just step it into something plain vanilla??

i can't say i'd like having that huge T-bar at the top creating windage in a storm.

the huge advantage of such a sail to a unarig proa would be to move the COE forward and balance the boat better. i also really like how the camber is so easily adjusted.

it's been awhile since i looked into this, but IIRC a thick foil confers no benefit at the reynolds numbers typical of sailing. so you're better off with the simplicity of a single-surface sail. can anyone confirm? rick??

ben