SECRETARY'S REPORT 149 



National Cash Register Co., Dayton, Ohio: (Through Carl Beust.) A full- 

 sized reproduction (5 ft. x 16 in.) of the Wright Brothers' wind tunnel, 1902, 

 complete with balances, airfoils, and other test shapes, and with its 2-bladed 

 fan mounted on a grinder-head and supported on a wooden post as in their 

 original installations (N.A.M. 741). 



Navy, Department of, Washington, D. C. : Original wind-tunnel model of a 

 Sturtevant S-4 seaplane, 1916 (N.A.M. 723). A rocket engine, regeueratively 

 cooled, designed by James H. Wyld, and tested, 1938 (N.A.M. 731). (Through 

 the Office of Naval Research, Special Devices Center, Port Washington, L. I.) 

 A General Electric 1-16, J-31 jet engine, cut-away example, 1,600 pounds static 

 thrust, at 16,500 r. p. in., 1942 (N.A.M. 743). Two jet aircraft engines— a 

 German Junkers Junto 004, 1.9S0 pounds static thrust at about 8,700 r. p. m., 

 1943, and an English DeHavilland Ooblin, 3,000 pounds static thrust at 10,200 

 r. p. m., 1943 ; both having parts sectioned and cut away to show construction 

 and operation (N.A.M. 744). Seven reciprocating aircraft engines— a Wright 

 Brothers' 4-cyl. upright 30-hp. at 1,200 r. p. m. of 1910; a Wright Brothers' 

 60-cyl. upright 60-hp. at 1,400 r. p. m. of 1912 ; a Curtiss 6-cyl. upright 60-hp. 

 at 1,500 r. p. m. of 1913 ; a Curtiss K-6, 6-cyl. upright 150-hp. at 1,700 r. p. m. of 

 1918; a Gnat A. B. C. (English) 2-cyl. opposed, 45-hp. at 1,915 r. p. m. of 1919; 

 a Ranger V-770-8, 8-cyl. inverted Vee, 520-hp. at 3,150 r. p. in. of 1941 ; and a 

 Packard-Merlin (American version of English Rolls-Royce), V-1650-7, 12-cyl. 

 Vee, 1,490-hp. at 3,000 r. p. m. of 1945 (N.A.M. 748) . 



Newcomb, Charles J., Baltimore, Md. : An exhibition model, scale 1 : 16, of the 

 Glenn L. Martin TT airplane, one of the first tractor designs ordered by the 

 Aviation Section of the U. S. Signal Corps and the Navy, 1914. This was a 

 2-place biplane powered with a Curtiss SO-hp engine and with a speed of 65 mph. 

 It was described by Grover Loening, then Aeronautical Engineer for the Signal 

 Corps, as the Army's "first really safe and satisfactory training airplane" 

 (N.A.M. 725, purchase). 



Parker, William D., Bartlesville, Okla. : The droppable landing gear, radio 

 set, and loop antenna used by Wiley Post during his continental substratosphere 

 flights in the Winnie Mae, 1935 (N.A.M. 746). 



Pratt & Whitney Aircraft Division, United Aircraft, East Hartford, Conn., 

 with assistance of Harvey Lippincott: Engine accessories embodying signifi- 

 cant developments of the World War II period, comprising 7 carburetors, 3 

 automatic engine controls, and 7 other accessories, cut away to show con- 

 struction (N.A.M. 742). 



Stout, William B., Phoenix, Ariz., with cooperation of the University of Detroit : 

 The Stout Sky Car, a 2-place high-wing monoplane, all-metal construction, 

 with pusher engine, designed as a general-purpose sport plane, 1931 (N.A.M. 

 750). 



Topping, E. W., of Topping Models, Akron, Ohio; Exhibition model, scale 1:48, 

 of the Glenn L. Martin Co. P4M-1 Mercator, long-range patrol airplane, 1949 

 (N.A.M. 724). 



Valley Frocks, Inc., Lancaster, Pa. : A selected collection of parachutes, para- 

 chute parts, and other aeronautical gear dating from 191S to 1942 (N.A.M. 722). 



Respectfully submitted. 



Paul E. Garber, Head Curator. 

 Dr. A. Wetmore, 



Secretary, Smithsonian Institution. 



