"PIM" wrote in message ...
"Simple Simon" wrote:
The prime motive force occurs on the leeward side of the
sail and not on the windward side as PIM is attempting
to suggest.
I am not suggsting that the sailforce comes from the windward side alone,
The leeward side is also very effective in deflecting the wind.
(Actually I suggest the leeward side is a little more important, because
there is more air on the leeward, because it has been sucked to the leeward
side.)
again, this is on my website under www.sailtheory.com/sail.html

And why is it sucked to leeward? Because it causes a vacuum and nature
abhores a vacuum, thus it sucks the sail forward.

Capt. Dowra,ESQ