Wind turbine nacelles (generator housings) are mounted on turntables. An anemometer and wind vane on top each nacelle continuously gathers wind velocity and direction data and sends it to a computer. The computer then "aims" the nacelle via a motor geared to the turntable based on the wind data.
You can see the wind data instrumentation to the left of the red anticollision beacon in this photo. (Turbine is one of 18 General Electric 1.5 megawatt units at the Fenner, NY wind farm)
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Today's Featured Article - An AC Model M Crawler - by Anthony West. Neil Atkins is a man in his late thirties, a mild and patient character who talks fondly of his farming heritage. He farms around a hundred and fifty acres of arable land, in a village called Southam, located just outside Leamington Spa in Warwickshire. The soil is a rich dark brown and is well looked after. unlike some areas in the midlands it is also fairly flat, broken only by hedgerows and the occasional valley and brook. A copse of wildbreaking silver birch and oak trees surround the top si
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