1931 “T” Head Side Valve

1931 “T” Head Side Valve Here’s a copy of lithograph images (below the video) of the four-stroke cycle from Chapter V, “The Otto Cycle In Practice”, Internal Combustion Engines; Their Principles and Application to Automobile, Aircraft and Marine Purposes. It’s by the Officers of the Department of engineering and Aeronautics, The United States Naval Institute, Annapolis, …