On Nov 21, 4:09*pm, Vic Smith wrote:
Need a new boat design. *
There was a post recently I can't find, but the poster mentioned
using a para-glider type sail.
Since I tend to think about using the wind to turn a screw, even the
lift from a para sail could be made to work with cams, gears, and
dumping air. ...

You might be looking for autogyros. Google has billions and billions
of hits for autogyros and autogyro kites. This link is kind of
interesting:



--Tom

PS. We've decided to see what the lows do so are still here in
Ensenada until Wednesday.