The Stout ST was a twin-engine torpedo bomber built for the US Navy. It pioneered the American use of metal construction and the cantilever "thick wing" design concepts of German aeronautical engineer Hugo Junkers, themselves pioneered in the second half of 1915.

Hugo Junkers was a German aircraft engineer and aircraft designer who pioneered the design of all-metal airplanes and flying wings. His company, Junkers Flugzeug- und Motorenwerke AG, was one of the mainstays of the German aircraft industry in the years between World War I and World War II. His multi-engined, all-metal passenger- and freight planes helped establish airlines in Germany and around the world.