Capt.Bill wrote:
http://www.windvinder.com/index.php?id=14&L=1


This looks like a rather large poetic version, perhaps less efficient,
than the first prototype upwind model: this is a shaft with a small
water prop on one end, and an air prop - a windmill really - on the
other end.
The shaft is held up at an angle by one or several floats to carry the
shaft. Though it's hard to believe, this kind of water/windmill really
does propel itself upwind always.

Brian W