This engine was featured in a series starting in the September/October 1995 issue of The Home Shop Machinist magazine. It has a bore of 3/4” but lacks some of the features typically found on a hit-n-miss engine. For example, there is no water jacket to cool the cylinder, nor are there cooling fins. Gears have been eliminated and the exhaust valve cam is mounted directly onto the crankshaft. There are no piston rings and the flywheel can be mounted firmly onto the crankshaft without the aid of a keyway or broaching tool. Lubrication for the piston is provided by adding 2-cycle motor oil to the fuel. It was designed as a simple and inexpensive motor made from easily obtained materials.