 These efforts proved successful, and he left his position at Farnborough to emigrate to the United States.At Martin, he assisted in the design of the XB-51 medium bomber, the design of which reflected his work in swept wing design and T-tail aerodynamics, and by 1963, he had been promoted to the position of chief scientist at Martin.In this position, as part of a U.S. Air Force contract for the development of a full-scale model of a high-volume lifting body design for manned spaceflight, he developed the "SV-5" aircraft.