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The simplest and most common example of a wind-driven whirligig is the pinwheel. The pinwheel demonstrates the most important aspect of a whirligig — blade surface. Pinwheels have a large cupped surface area which allows the pinwheel to reach its terminal speed fairly quickly at low wind speed.
In Iran, a windcatcher is called a bâdgir, bâd "wind" + gir "catcher" (Persian: بادگیر). The devices were used in Achaemenid architecture. [15] They are used in the hot, dry areas of the Central Iranian Plateau, and in the hot, humid coastal regions. [15] Central Iran shows large diurnal temperature variation with an arid climate.
A garden ornament or lawn ornament is a non-plant item used for ... Spinners: usually shaped like flowers with petals that spin in the wind. ... as large as 12" in ...
A gustnado near Williamstown, Kansas on April 3, 2011. This gustnado is a good example that gustnadoes can cause damage; it caused damage similar to that of a weak tornado: "Two center pivot irrigations were flipped over, a large outdoor shed was destroyed and several tree limbs were snapped."
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Large three-bladed horizontal-axis wind turbines (HAWT) with the blades upwind of the tower (i.e. blades facing the incoming wind) produce the overwhelming majority of wind power in the world today. [4] These turbines have the main rotor shaft and electrical generator at the top of a tower and must be pointed into the wind.
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