Farm Windmill - Converting up and down motion to circular?

 Hey There:

I have a farm windmill that produces up/down motion, about 4 inches of
travel.  Any idea how to convert this action into rotary motion, so as to
run a generator or alternator?

Thanks.

Glenn

 

Connect it to a "crankshaft" with the same rotational diameter as the motion.
(Same as the one that generates the motion)

 Glenn Jensen wrote:

hi Glenn
is it not just possible to direct drive or belt drive off the main shaft
from the blades ?
as I understand it wind pumps are designed for low rpm high torque so a
belt system to increase rpm to alternator might be a good idea .
Sam c .

 

 Can you not not take a look at the top of the tower for inspiration?

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Regards, John.

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The windmill must be converting rotary motion to up-and-down motion
in the first place.  I'm not expert on wind systems, but wouldn't it
make sense to take out the crankshaft or whatever that does the
conversion and mount your generator up on the windmill?  You may need
a gearbox, though.

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