 Following their defeat at the end of World War II, the West Germans were prohibited from undertaking any research or development related to aircraft until 1955, which left Willy Messerschmitt looking for work.He therefore moved to Spain where he joined Hispano Aviación and started designing an ultralight fighter aircraft in 1951.A lack of funds slowed the aircraft's development and Messerschmitt was able to build only a delta-shaped tailless plywood glider.