Here you can see the CAD blueprints used to engineer the Lynching. The drawings here are hyper linked to full page pictures of the drawings so you can look up close at the details and the dimensions. The idea here is to mount the air cylinder upside down, and using a T joint in the center of a free floating hip section suspended by modified larger T joints to the bottom of the chest cavity, we will attach the cylinder to a short lever inserted in the bottom T. Since the bottom T will be slightly angled backwards (at a 10 degree angle), when the cylinder is triggered, it will kick the hip section backwards, sending the legs forward as shown.

   As seen in this photo, the air cylinder will need approximately 2 1/2" of throw if my lever piece is 2 3/4" long. Since the air cylinder we are using has a throw of almost exactly 4" (3 7/8") of travel, it will also give us some extra length of shaft to space the cylinder a little higher in the chest cavity of the skeleton, allowing us room to install a "waist" below the cylinder but above the cylinder link point. More on that later.  We will be using mostly all schedule 40, 1 1/2" PVC pipe for the construction of our skeleton, topping it off with a wig form once it is all done. Everywhere you see dimensions in these photos illustrates the length of PVC pipe needed. So this means to achieve our skeleton we will need;