Tom killed my first post on this matter BUT.... UGL is wrong ... boats and wind-cars CAN go into the wind "and it ain't overunity".
http://www.gizmag.com/the-first-race-for-wind-powered-vehicles/9953/
Personally, I'd like to see the variable pitch mechanism on the winning car THAT WENT 64%+ OF THE WINDSPEED directly into the wind.
Thanks for bringing the subject up....
Ron
Adventure is just bad planning." -- Roald Amundsen