The Duesenberg name became legendary in early auto racing and is now known around the world as one of the most sought after classic cars. For a brief period, encompassing World War I, Fred and Augie Duesenberg turned their attention to aircraft engines. In the span of five years, their company created four unique aircraft engines and was involved in the development of others. Duesenberg Aircraft Engines: A Technical Description contains over 100 illustrations and describes the aircraft engines from this nearly forgotten chapter in Duesenberg and aviation history.