Low pressure air engine

Simple air engine, can be run off of as low as 1 psi. Materials needed: 3mm wooden skewer, 16 gauge (or 1.3mm) wire Assembly: cut 2 20cm long piece of the wooden skewer, and glue one into the center of one of the piston crankshafts. Then glue a 8mm long 16 gauge piece of wire into the smaller hole of the crankshaft, which is further away from the center. After gluing the wire, slide in the piston conrod into it. Then you can place another piece of the piston crankshaft the same way you did with the first one. After putting it together you can fit the wooden skewers into the both pieces of the crankcase and it should be closed into one box. after that, put the cylinder onto the piston and press fit it into the crankcase, making sure the hole on the side of the cylinder points to one of the skewers. Try spinning it, and if it spins easily, you can continue on. Glue the valve holder onto the hole of the cylinder, making sure the valve opening points down to the engine.After that, put the