Step-by-step instruction manual for building either a two-stage wind machine for water pumping or a three-stage rotor for charging batteries. Simple construction using hand tools and commonly available materials.
Fully illustrated Author: Jozef A. Kozlowski 1977 53 pages
Savonius Rotor Construction book 
Step-by-step instruction manual for building either a two-stage wind machine for water pumping or a three-stage rotor for charging batteries. Simple construction using hand tools and commonly available materials.