A new chapter 6 has been added to report KD 656. In this chapter it is investigated how the rotor and the characteristics change if the 0.5 m long connecting strip which connects both blades is changed by a 0.75 m long connecting strip. It appears that the same blades can be used but that now the connecting strip has to be twisted 4 degrees in stead of 5 degrees. With this bigger rotor, the windmill is called the VIRYA-3.17. The Pel-V curve of the VIRYA-3.17 is better than the one of the VIRYA-2.92.