McDonnell Aircraft
James McDonnell founded J.S. McDonnell &amp; Associates in Milwaukee, Wisconsin, in 1928 to produce a personal aircraft for family use. The economic depression from 1929 ruined his plans and the company collapsed. He went to work for Glenn L. Martin. He left in 1938 to try again with his own firm, McDonnell Aircraft Corporation, based at St. Louis, Missouri in 1939.