A new chapter 9 has been added to report KD 710 about the VIRYA-5B3. The title of this chapter is: “Ideas about a rotor with stainless steel blades”.

A new chapter 6.2 has been added to report KD 377 about the pendulum safety system. The title of this chapter is: “Alternative with the hinge axis below the rotor axis and the rotor before the tower”.