Just found an item about a wind turbine that doesn't have a gearbox to
waste energy and runs at 2 - 45 mph. One of my dislike about these
contraptions is the amount of gubbins to run before anything useful comes
out. This one is pretty well a wind-driven electric motor:

http://www.earthtronics.com/honeywell.aspx
--
Peter.
The head of a pin will hold more angels if
it's been flattened with an angel-grinder.