The three primary types of wind turbine--Savonius and Darrieus vertical axis wind turbines (VAWTs) and a standard horizontal axis wind turbine (HAWT)--all with three blades, are spinning as if they are in operation in real wind. They are spinning at the same speed (mathematically); 30 rpm.
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2010-08-26
<span class="int-own-work" lang="en">Own work</span>