Report KD 702 can be copied for free at the menu KD-reports. The tittle of this report is: “Ideas about the 8-bladed rotor of the VIRYA-0.54 windmill (lambda design = 1.25, pentagonal aluminium blades) coupled to a Nexus hub dynamo for 12 V battery charging”.

The VIRYA-0.54 is a very simple and light windmill without a head and a safety system which is placed on top of a bamboo pole. The rotor is turned in the wind by manually turning of the bamboo pole.