Report KD 797 can be copied for free from my website at the menu KD-reports. The title of this report is: “Calculations executed for the 3-bladed rotor of the VIRYA-4.1S windmill (lambda design = 4.5, stainless steel blades) driving the PM-generator of Magnetic Innovations type 260-75 LS for water pumping or grid connection or the type 260-75 HS for 48 V battery charging”.