http://www.renewableenergyworld.com/rea/news/article/2009/11/largest-win...

Strong winds are a common research partner for scientists working at NREL's National Wind Technology Center (NWTC). Recently, those gusting Colorado winds helped usher in a new milestone for wind technology research and development. NREL and Siemens Power Generation "flipped the switch" starting the blades on a Siemens 2.3 megawatt wind turbine installed as part of a cooperative research and development agreement (CRADA) for testing turbine aerodynamics, structure and reliability.