Siemens Energy has opened two major Research & Development test facilities for wind turbine technology in Denmark. The new test center in Brande features test stands for major components of Siemens wind turbines, including generators, main bearings and complete nacelles. In Aalborg, seven blade test stands are capable to perform full scale tests of rotor blades, including the world's largest blade in operation with a length of 75 meters. In combination, the two facilities form the world's largest R&D test center for wind turbine technology.