The Ford
            Motor Company purchased the Stout Metal Airplane Company
            in 1925 to further develop the Stout 2-AT Pullman.  A
            three-engine version of the Pullman, designated the 3-AT was a
            failure and only one was built.
            The first of the famous (successful) Ford
            Trimotors was the 4-AT of which the prototype flew in 1926.
            Ford left the aircraft business in 1932 because of
            the Great Depression.
            Ford re-entered the aircraft business in 1941 to
            build a huge factory at Willow Run, Michigan.  This plant built
            over 6,900 B-24s by the end of World War II.