Savonius wind turbine

The airfoils rotates as shown in the video regardless the wind direction. The airfoils are fixed to the center shaft (its end plates) at their ends. The upper plate of the airfoils is not shown in the video last scene, so the cross section of the airfoils can be seen. The section consists of two letters C arranged to create a letter S. In comparison with horizontal axis wind turbines it is simpler but less efficient. For more about this turbine see: Inve