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They believe the first documented windmills were made in china in 1219 AD. By the chineses statesman Yehlu Chhu-Tshai.
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Vertical-axis windmills were also used in China, which is often claimed as their birthplace. While the belief that the windmill was invented in China more than 2000 years ago is widespread and may be accurate, the earliest actual documentation of a Chinese windmill was in 1219 A.D.
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As early as 1930, the dutch went out to refine the tower mill design. The dutch essentially made it a 3 story tower. One for grinding grain, removing chaff, and storing grain.
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As early as 1390, the Dutch set out to refine the tower mill design, which had appeared somewhat earlier along the Mediterranean Sea
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Between 1850 and 1970, over six million mostly small (1 horsepower or less) mechanical output wind machines were installed in the U.S. alone.
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In 1891, the Dane Poul La Cour developed the first electrical output wind machine to incorporate the aerodynamic design principles used in the best European tower mills
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While continuing well into the 19th century, the use of large tower mills declined with the increased use of steam engines. The next spurt of wind power development occurred many thousands of miles to the west.
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In the late 19th century, the successful "American" multi-blade windmill design was used in the first large windmill to generate electricity.
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Some models also featured aerodynamic brakes, spoilers, and flaps. (which was operating with two of its buddies pumping water about one meter up from one irrigation pond to another in the Netherlands in 1994)
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The first windmills were used to pump water.