Horizontal Wind Mill

-Horizontal wind mills are used for high power generation and for regularly used for commercial use
-Loud and visually obtrusive
Vertical Wind Mill

-Vertical Wind Mills are usually small and used for small generation of power
-They are quieter than the larger horizontal wind mills
HISTORY
-Wind Mills were first invented in the 9th century to pump water or grind types of grain
-They used cloth sheets as generators of lift to move the drive shaft of the windmill
FUNCTION
-The Earth tilted on its axis resulting in uneven heating between the poles and the equator
-This means that the hot land along the equator heats up and cools down faster than the ocean. This differential makes atmospheric convection possible, thus creating wind.
-When the wind hits the blades, they are shaped like wings on an aircraft thus producing lift which in turn turns the windmill.
-The Wind hits the turbines, spins the drive shaft which in turn turns the drive shaft of the generator thus producing electricity
-All the close by wind turbines are connected by a power collection system then is routed to a power substation which turns out the electricity to the public
-When the wind changes directions, the wind turbine has to manually be moved to face the direction of wind

-The largest windmill ever is 413 feet across at the wind turbine and can power 1776 US homes a year