for first aerial flight around the world. 1925 – Sylvanus Albert Reed, for the metal propeller. 1926 – Major Edward L. Hoffman of the United States Army Air Service for the development of a practical parachute. 1927 – Charles L. Lawrance, for the development of the air-cooled aircraft radial engine. 1928 – Aeronautics branch of the United States Department of Commerce for development of airways and navigation facilities. 1929 – National Advisory Committee for Aeronautics (NACA), for design of the NACA cowling for radial air-cooled engines. 1930 – Harold Frederick Pitcairn and associates for development of the autogyro. 1931 – Packard Motor Car Co. for the design/development of the first, practical diesel aircraft engine, the DR-980 radial engine. 1932 – Glenn L. Martin for the design of the Martin B-10 (XB-907) bomber. 1933 – Frank W. Caldwell of Hamilton Standard for the hydraulically controllable propeller. 1934 – Captain A. F. Hegenberger USAAC for the first blind flying landing system. 1935 – Donald W. Douglas and his technical and production personnel for the outstanding twin-engine transport airliner. 1936 – Pan American Airways for establishment of a transpacific airline and the successful execution of extended overwater navigation in regular operations. 1937 – Army Air Corps for the design and development of the Lockheed XC-35. 1938 – Howard Hughes and his associates for breaking the record time by flying around the world in 91 hours and 14 minutes. 1939 – Airlines of the US safety record, with special recognition to Walter Boothby, Randolph Lovelace, and Harry Armstrong. 1940 – Dr. Sanford A. Moss and the Army Air Corps for development of the turbo-supercharger. 1941 – Army Air Corps and the Airlines of the US for pioneering worldwide air transportation vital to immediate defense. 1942 – General Henry Arnold for his "organization and leadership of the Army Air Forces throughout the world." 1943 – Captain Luis de Florez, United States Navy Reserve for his contribution to the safe and rapid training of combat pilots and crews. 1944 – Carl Spaatz "for demonstrating the air power concept through employment of American aviation in the war against Germany." 1945 – Luis W. Alvarez for the Ground Controlled Approach (GCA) which allowed radar operators to guide pilots to a safe landing in all weather conditions. 1946 – Lewis A. Rodert of NACA, for the design and development of an aircraft anti-icing system. 1947 – Lawrence Bell, John