What is the current largest single wind turbine ever built?

What is the current largest single wind turbine ever built? I know of a GE turbine circa 2003 that is rated for 3.6 MW, but I thought there were offshore turbines planned as large as 100 MW for a single turbine? Please let me know. Jim B., Alberta, Canada

Jim, Germany’s REpower (Corp) offers the world’s largest wind turbine, which is a 5 MW machine with a three-bladed rotor at a diameter of 126 meters. The US Department of Energy’s RD&D program supported the Mod -5B built by Boeing, which was a 3.5 MW turbine with a two bladed rotor with a diameter of 97.5 meters that operated form July 1987 to March 1992. According to USDOE’s Bob Thresher, European researchers are proposing an R&D collaborative project to study and build a test unit for offshore applications in the 10MW size range. Scott
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Scott, founder and president of The Stella Group, Ltd., in Washington, DC, is the Chair of the Steering Committee of the Sustainable Energy Coalition and serves on the Business Council for Sustainable Energy, and The Solar Foundation. The Stella Group, Ltd., a strategic marketing and policy firm for clean distributed energy users and companies using renewable energy, energy efficiency and storage. Sklar is an Adjunct Professor at The George Washington University teaching two unique interdisciplinary courses on sustainable energy, and is an Affiliated Professor of CATIE, the graduate university based in Costa Rica. . On June 19, 2014, Scott Sklar was awarded the prestigious The Charles Greely Abbot Award by the American Solar Energy Society (ASES) and on April 26, 2014 was awarded the Green Patriot Award by George Mason University in Virginia.

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