Battery booster coils for airplane-engine ignition systems

W. E. Berkey (Westinghouse Electric and Manufacturing Company, East Pittsburgh, Pa.): Magneto ignition systems on aircraft engines require extra ignition starting equipment, which is in use only a few seconds during starting, to be carried on the air-lane. It appears that engine-starting ignition boosters will be necessary, until improved engine cranking can turn over the engine at speeds sufficient to start magneto sring of the spark plugs, or until new ignition systems can be developed to fire the cylinder charge at all speeds.