A Savonius is a type of vertical axis wind turbine (VAWT) generator invented in 1922 by Sigurd Johannes Savonius from Finland though similar wind turbine designs had been attempted in previous centuries.  The Savonius is a drag-type VAWT which operates in the same way as a cup anemometer (pictured below). Looking at the anemometer, it … Continue reading Savonius Wind Turbines