Abstract: A wind rotor assembly is constructed as a variation of a Savonious rotor with two offset compound curve rotor plate members symetrically located about an axis and including a smaller S-shaped rotor at the axis in the space between the first and second rotor members. The assembly is used singly or in composite assemblies of several rotors on a common shaft, and it produces increased torque and operates at low wind velocity for use in the generation of electricity or in conjunction with a water pump or other applications.