In this manual the rotor and the generator of 3-bladed VIRYA-1.66, electricity generating windmill, are described. This windmill is provided with a 12-pole, 3-phase axial flux generator and is meant for 12 V battery charging after star rectification of the winding. The design calculations of the generator and the rotor are given in report KD 596 (ref. 1). The drawings of the rotor and the generator of the VIRYA-1.66 windmill are numbered 1601-01, 1601-02 and 1601-03.