Report KD 671 has been added to the menu KD-reports. The title of this report is: “Translation of parts of report R-668-A “Optimalisering van een windservo” (Optimizing of a wind servo) from Dutch into English. Ideas about the VIRYA-2B8″.

Report R-668-A of the Wind Energy Group of the University of Technology Eindhoven was already written in 1984 by the student J. Swinkels. I was one of his supervisors. As this report is no longer available, I thought that it is useful to translate the most important part of it and make it public again.

Report KD 671 gives the wind tunnel measurements for a wind servo for the most promising blade angle of 30° for seven different yaw angles. Chapter 4 gives correction for wind tunnel blockage for the rotor perpendicular to the wind. Chapter 5 describes the VIRYA-2B8 rotor which is about congruent to the measured wind tunnel model.

Report KD 670, in which the VIRYA-5.2 rotor is described, has been reviewed. Detailed drawings of the rotor have been added in appendix 3.

Report KD 670 has been added to the list of public KD-reports. The title of this report is: “Calculations executed for the 3-bladed rotor of the grid connected VIRYA-5.2 windmill (lambda design = 6, Gö 711 airfoil, wooden blades) provided with the hinged side vane safety system”. An advantage of this windmill is that it uses a standard Chinese axial flux generator and so it isn’t necessary to build the generator.