The Windspire, a small VAWT intended for individual (home or office) use was developed in the early 2000s by US company Mariah Power. The company reported that several units had been installed across the US by June 2008. Arborwind, an, based company, produces a patented small VAWT which has been installed at several US locations as of 2013.
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The average blade length of a typical onshore wind turbine is about 165 feet (50 meters), but there is a trend towards taller turbines, particularly offshore, where blades can span up to 260-290 feet (80-90 meters). Wind turbine blade technology has evolved dramatically over the.
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Wind turbines work on a simple principle: instead of using electricity to make wind—like a fan—wind turbines use wind to make electricity.
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During the winter season, turbine blades are vulnerable to ice buildup that can lead to reduced aerodynamic efficiency, safety hazards, increased wear on components, and in many cases, complete turbine shutdowns.
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