Report KD 285 about the Gö 711 airfoils has been reviewed. A new chapter 4 has been added in which the moment coefficient Cmh is given around point H which is lying at 0.3 * c from the airfoil nose and half way the blade thickness.
Report KD 463 in which the aerodynamic characteristics of four Gö airfoils are given, has been changed. The Cm0.2-alfa curve has been added to figure 14 about the Gö 623 airfoil. A new chapter 5 has been added and figure 15 out of this chapter gives the curves for the Gö 624 airfoil.