Learn more about how a windmill works by watch these helpful windmill videos.
Kevin from Rock Ridge Windmills and Texas Windmills put together some very help videos about windmills.
Here are a few helpful video:
How a Windmill Works
Learn how a windmill pumps water by watching this video:
Windmill Speed Control
See a windmill self-regulate the wind wheel speed in high winds:
Inside the Windmill Gearbox
See how the windmill converts the wind to pump water: