Report KD 793 about the VIRYA-3.2 is replaced by report KD 794 about the VIRYA-3.6. The title of KD 794 is: “Calculations executed for the 3-bladed rotor of the VIRYA-3.6 windmill (lambda design = 4.75, stainless steel blades) driving the PM-generator of Magnetic Innovations type 260-25 HS for 48 V battery charging” or water pumping. The reason is that it was expected that the torque level of the chosen generator allows a larger windmill rotor resulting in a maximum electrical power of about 1 kW at V = 10 m/s.