Report KD 758 has been added at the menu KD-reports. The title of this report is: “Calculations executed for the 2-bladed rotor of the VIRYA-5T windmill (lamda design = 6.5, galvanised steel tapered blades) meant for connection to the axial flux generator of Hefei Top Grand type TGET450-5KW-300R for grid connection or water pumping”. Chapter 7 of this report gives an explanation for low head water pumping using a standard 1-step centrifugal pump with a 5.5 kW, 3-phase asynchronous motor. A new chapter 8 has been added on 27-4-2024. The title of this chapter is: “Checking of the head geometry”.