Report KD 676 has been added at the menu KD-reports. The tittle of this report is: “Calculations executed for the 2-bladed rotor of the VIRYA-2.22 windmill (lambda design = 5, stainless steel blades) using the axial flux PM-generator of Hefei Top Grand model TGET260-0.5KW-350R”. The VIRYA-2.22 has also been added to the folder of the VIRYA-1.75 W and the VIRYA-1.8W.

Report KD 608 has been reviewed. The thickness of the aluminium rotor blades has been increased from 1.5 up to 2 mm. A new chapter 9 has been added in which the use of a steel stator sheet has been investigated. Some minor changes have been made in the report.

Report KD 672 has been added at the menu KD-reports. The tittle of this report is: “Use of the VIRYA-1 or the VIRYA-1.25AF for pumping of drinking water using a 12 V battery and a pump with a 12 V, DC motor”. Although the VIRYA-1 is a small windmill with a rotor diameter of only 1 m, it is big enough to pump a flow q of 200 litres water per day against a height H = 17 m at a wind speed less than 3 m/s.

Report KD 490 “Water pumping with a windmill” has been reviewed such that report KD 672 is now also mentioned.