Schematic drawing of a two-scoop Savonius turbine.
The original uploader was <a href="https://en.wikipedia.org/wiki/User:Jaganath" class="extiw" title="wikipedia:User:Jaganath">Jaganath</a> at <a href="https://en.wikipedia.org/wiki/" class="extiw" title="wikipedia:">English Wikipedia</a>.
CC BY-SA 3.0
Originally from <a class="external text" href="https://en.wikipedia.org">en.wikipedia</a>; description page is/was <a href="https://en.wikipedia.org/wiki/en:Image:Savonius_turbine.gif" class="extiw" title="w:en:Image:Savonius turbine.gif">here</a>.