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.