Report KD 792 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-4S windmill (lambda design = 5, stainless steel blades) driving the PM-generator of Magnetic Innovations type 260-75 HS for 48 V battery charging”. The compact radial flux generator of this wind turbine is originally used as a fan motor. At 25-2-2026, a new chapter 7 has been added to KD 792. The title of this chapter is: “Simplification of the spoke assembly”. The triangular sheet is now cancelled. At 27-2-2026 a new chapter 8 has been added to KD 792. The title of this chapter is: “Description of the generator winding”.