degree in mechanical engineering from the University of Illinois at Urbana–Champaign and after his racing days were over, pursued a Ph.D. from the MIAT College of Technology.
[8] During World War II, he served with Gen. Dwight D. Eisenhower as Chief of Maintenance for the U.S. 8th Air Force and left the service in 1945 as a LtCol.
[2] Following the war, Arnold worked at Fretwell's DeSoto then entered the construction business, building upscale houses and one of the first shopping centers in Oklahoma.
Arnold died November 10, 1976, in Oklahoma City, of a cerebral hemorrhage,[11] aged 70.
At the time of his death he was married to LaFrance Arnold, his second wife.