So many people asked me how to make those bellows for buses like my Articulated Bus.
Now I'm going to show you how to build them very easy with just a sheet of paper.
1. Step:
Take a sheet of paper, a ruler and a pencil and draw this grid on it:
2. Step:
Fold on the lines the paper up and down, like shown.
3. Step:
Take the left and the right part and fold them to the bottom.
Now abrade the corners.
I have found my own way to make my own set of Paper-Bellows for my articulated LEGO trolleybus. Thanx anyway. Maybe I will use this tutorial for my next bus.