Normally used for turning wheat into flour. An area where you have a collection of wind turbines, is known as a wind FARM. In more modern days instead of a brick house, you have a metal pole with a rotating rotor. However, it can also be used to describe a different factory or plant with a different operation i. The picturesque view of them is with sails spinning from the gust of the wind. It is used to provide power to a local area using the wind as energy. Provided is an evaluation index setting method including: a first step which acquires load time-sequence data acting on a portion of a windmill to be evaluated when operation is performed under a predetermined condition and obtains stress time-sequence data from the load time-sequence data; and second step which acquires a minimum destruction resistance value required for the portion to-be-evaluated to maintain a predetermined intensity and decide a required destruction resistance value serving as an index according tothe destruction resistance value. They are exceptionally useful in areas with a lot of wind, like the Plains States in the central US. Those are known as wind TURBINES.。
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