The precursors to modern wind turbines came into being in the 1930s and 1940s. The world's first megawatt wind turbine connected to the power grid in Castleton, Vermont, in 1941. It was 100 feet tall, had 75-foot blades, and weighed 240 tons.
There have been many types of wind turbines — the average U.S. commercial wind turbine’s hub height has grown from 20 to 88 meters (65.5 to 288 feet), and rotor diameter from 20 to 116 meters (65.5 to 380.5 feet). Every year, bigger and more powerful wind turbines are designed, and the giants stand more than 200 meters tall, or 656 feet.