Changes recommended for ignition systems

As the result of a series of tests on ten automotive ignition systems, several modifications of the systems now in use in the automotive industry are suggested for the benefit of manufacturers of spark generators. The report is issued by the National Advisory Committee for Aeronautics, through the Department of Commerce. The tests were run at the Bureau of Standards. Both high-tension magnetos and battery coil systems were studied. The full range of automotive practise was included, both from the standpoint of mechanical condition and endurance of the systems.