In all, Messerschmitt had 500 employees in the design department and about 1,300 more in the factory.[5] At the end of the Second World War, the Messerschmitt design department was visited by both U.S. and British scientific missions, as well as by teams from Bell (who stayed for five weeks) and de Havilland.[6] Among the German staff interviewed by the Fedden Mission were Woldemar Voigt, Messerschmitt's chief designer, Hans Hornung, and Joseph Helmschrott.[7]