 Nowadays, when a discussion is established around the theme wind power generation, what is promptly addressed is the image of a big wind turbine getting turned by the wind.However, some alternative approaches have already been proposed in the latter decades, showing that wind turbines are not the only possibility for the exploitation of the wind for power generation purposes.In 1977 Jeffery  experimented with an oscillating aerofoil system based on a vertically mounted pivoting wing which flapped in the wind.