The following brief article is reprinted from the June 1929 issue of Scientific American. It was sent to us by A. W. Sponseller, 2609 Black Oak Dr., Niles, Ohio 44446.
In 1905 the first air-cooled engine was developed for industrial and foreign use by The 'New Way' Motor Company of Lansing, Michigan, and for 23 years this company has consistently stood by its conviction that the air-cooled engine would eventually come into its own and the possibilities of light weight together with simplicity of construction would force a recognition of this type of engine for certain classes of work which could not be satisfactorily handled by a water-cooled engine.
There is no question regarding the ability of these engines to deliver satisfactory service; in fact, the latest and highest type of power, aircraft motors may be said to represent the last word in mechanical knowledge, and the seal of approval affixed to air-cooling by aircraft engineers settles for all time the debate on water versus air-cooling.
In the new twin-cylinder six to ten horsepower engine, announced recently, there are no water pipes, radiator fins, or other parts necessary to water-cooling. It is a valve-in-head type with detachable cylinder head. A large inspection plate may be removed, exposing all moving parts. A distinctive feature is the ease with which pistons may be removed and replaced through the inspection-plate opening. Roller bearings, air-governor, Eisemann special flywheel magneto, Tillotson float feed carburetor and air cleaner, and Lynite connecting rods are standard equipment on this new engine.
The flywheel is provided with a series of curved blower blades around its periphery, and as it turns it creates a partial vacuum in the wheel housing. The strong suction effect draws air in and down through the cylinder jackets. The air currents pass over and between the flanges at fairly high velocity, and as there is a large amount of exposed surface, the excess heat is promptly disposed of, being absorbed by air passing around the cylinders, which is ejected from the motor compartment by the action of the blower flywheel.