Deutsche Lufthansa issued a specification in June 1936 after discussions between Tank, Dr. Stüssel and Carl August von Gablenz. The plane was designed by Ludwig Mittelhuber with Wilhelm Bansemir as project director. The first prototype, the Fw 200 V1, made its first flight after just over one year of development on 27 July 1937 with Tank at the controls. It was an all-metal, four-engined monoplane powered by four American 875 hp Pratt & Whitney Hornet radial engines, and intended to carry 26 passengers in two cabins for up to 3,000 km (1,860 mi). Two further prototypes were powered by German 720 hp BMW 132G-1 radials.