Zig-Zag 3D-Shaping is the next step to an even smoother wing nose. As well as Double 3D-Shaping, two parallel seams which stretch the entire length of the upper surface span, each cell located at the nose has a further diagonal 3D-Shaping seam. This forms a striking zig-zag pattern. This means the seam runs more cleanly and is more aerodynamically advantageous.
3D-Shaping is required because on the one hand the sail cloth has to align to the profile form and on the other, the ballooning also determines a radius which the cloth has to follow. It is as if trying to fold a piece of paper smoothly around a ball.
The advantage of Zig-Zag 3D-Shaping is that this seam doesn’t run in the direction of the spanwise force. This innovation further reduces creases on the leading edge - resultig in better glide performance.