While displaced from his home in Alsace by World War I, Bugatti designed airplane engines, notably the somewhat baroque 16-cylinder U-16, which was never built in any large number and was only installed in a very few aircraft. Between the wars Bugatti designed a successful motorized railcar dubbed the Autorail Bugatti, and won a government contract to construct an airplane, the Model 100. It was designed by Louis de Monge using two type 50B Bugatti engines but never flew due to the outbreak of World War II.