Windmill
device · 900 · Middle Ages
A mill driven by the wind.
What it is made of
- Sail — has part. A windmill’s sails are cloths on rotating arms.
- Millstone — has part. A windmill turns the millstones.
- Gear — has part. A gear turns the rotation towards the millstones.
Principles and materials it uses
- Wind power — uses. The prime mover is the wind.
- Wood — is made of. Windmills were built of wood.
History: what it evolved from and what it influenced
- Wind turbine — evolved into. A windmill with a generator instead of millstones.
Things built in a similar way
- Watermill — works like. The same mill, but with a different source of energy.