Wood Air, Vacuum Engine

Verticle wood engine built from plywood, oak, hardwood dowels, pvc pipe and bushings. Cylinder is made from lminated plywood rings lined with pcc pipe. Crankshaft has plywood webs and hardwood dowel shafts runnig in pvc bushings. Engine will run on positive or negative pressure and is reversable. I run this engine with a small vacuum cleaner attached to a variable speed control. Thanks for looking br, br,