A while ago we had a discussion of wind turbine designs.  That made me
remember a few ideas I had a while ago.  They are difficult to explain in
words, so I didn't try at the time.  For some reason I was thinking about
this last night so I created some pictures to demonstrate one of the design
concepts.

A single high resolution picture is as
http://www.embedinc.com/wind/wind.jpg.  An animation of it rotating due to
wind is http://www.embedinc.com/wind/wind.gif.  An animation showing how it
reacts to wind direction changes is at
http://www.embedinc.com/wind/windd.gif.

The two green plates are one assembly, and the rotation of this assembly is
where the power is taken from.  The center gear is kept oriented so that the
one marked tooth is pointing in the direction the wind is going.  The
gearing keeps the flat paddles always oriented flat to the wind on the right
side and edge on to the wind on the left side, thereby providing the
different wind force on the two sides that makes the whole assembly rotate.


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