The rotor blades catch the wind and pass the performance on the hub. The hub is connected with a slow-running drive shaft (the following sections are appropriate in a so-called gondola = housing). This wave contains hydraulic lines, which supply the air brakes. The transmission between the slow-running and the high-speed drive shaft causes that the high-speed wave runs approx. 50times faster than the first wave. The high-speed drive shaft propels an electrical generator, which brings an output of 500 - 1500kWh. The high-speed wave is also equipped with a mechanical disc brake, which is used, if the air brake fails or the system must be repaired.
The tower of the wind-powered device carries the gondola and the rotor. Usually a high tower is used as with rising height the wind velocity increases. A modern wind power station has a tower of 40-60 meters height. The gondola is not fix connected with the tower. It can align itself and the rotor after the wind and thus always profit from the optimal wind.
Wind power station (CH)
Behind a wind tower develops a wind tail, which indicates a smaller wind velocity than the wind before the tower. This wind tail is called also wake. So that the rear towers in a wind power station (wind park) can produce electricity much as the front, they must be rather far from each other stationed because of the wake.