Report KD 654 is added to the menu KD-reports. The title of KD 654 is: “Calculations executed for the 3-bladed rotor of the VIRYA-3.6PC windmill (lambda design = 4.5, galvanised steel blades) driving the VIRYA-4.2 PM-generator for 26 V star or driving a centrifugal pump through a rectangular gear box and a vertical shaft in the tower. Description of the pitch control system”. A sketch of the whole rotor is given in figure 1 of KD 654. A sketch of the pitch control mechanism is given in figure 6 of KD 654.