More efficiency (41-46%) than the Savonius turbine (10-20%) Low noise and simple design. Comparison Ugrinsky and Savonius wind turbines: https://www.youtube.com/watch?v=TAa8fu-6sRo
This design is optimized for 3D printing. It allows you to increase the height of the turbines. Turbine can to work for a common generator.
Ugrinsky wind turbine. by TanyaAkinora is licensed under the Creative Commons - Attribution - Share Alike license.