Charles F. Brush is widely credited with designing and erecting the world’s first automatically operating wind turbine for electricity generation. The turbine, which was installed in Cleveland, Ohio, in 1887, operated for 20 years with a peak power production of 12 kW (Fig. 2). An automatic control system ensured that the turbine achieved effective action at 6.6 rpm (330 rpm at the dynamo) and that the dc voltage was kept between 70 and 90 volts. Another remarkable project in early wind energy research was the 1.25-MW wind turbine developed by Palmer Putnam [3] in the U.S. The giant wind turbine, which was 53 m (175 feet) in diameter, was installed in Vermont, Pennsylvania, around 1940 and featured two blades with a hydraulic pitch control system.