This is an addon for the designs by Snelon and ZRex which allows wind drive for the strandbeest. You will need to reprint the last section`s frame and add fan, shaft and gears. You will also need a metric M3 bolt 25-30 mm long to use as an axis for the fan. There is also 120 degree camshaft arm included in case you decide to make a strandbeest with 6 pairs of legs as per original design by Theo Jansen. Print all parts in PLA 0.2 mm layer height, 2 perimeters, 20% infill, no supports Sand well the gear`s upper faces in order to remove all possible plastic blobs left after printing. You may o may not sand fan blades in order to have perfectly smooth surfaces.