National Advisory Committee for Aeronautics (NACA) - Browse

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Suggestions for Popularizing Civil Aviation

Description: The public generally is taking very little interest in the progress of Civil Aviation, and the time has come to educate the public in aeronautics and to make them realize the far-reaching importance of air transport. Briefly, the whole problem resolves itself into discovering and applying means for bringing some of the many aspects and effects of civil aviation into the everyday lives of the public. The report suggests three principal groups of methods: (1) Bring aviation into daily contact with the public. (2) Bring the public into daily contact with aviation. (3) General publicity.
Date: January 1, 1926
Partner: UNT Libraries Government Documents Department

Annual report for the National Advisory Committee for Aeronautics (10th).administrative report including Technical Reports nos. 186 to 209

Description: Report includes the National Advisory Committee for Aeronautics letter of submittal to the president, congressional report, summaries of the committee's activities and research accomplished, bibliographies, and financial report.
Date: January 1, 1925
Partner: UNT Libraries Government Documents Department

Annual report for the National Advisory Committee for Aeronautics (11th).administrative report including Technical Reports nos. 210 to 232

Description: Report includes the National Advisory Committee for Aeronautics letter of submittal to the president, congressional report, summaries of the committee's activities and research accomplished, bibliographies, and financial report.
Date: January 1, 1926
Partner: UNT Libraries Government Documents Department

Annual report for the National Advisory Committee for Aeronautics (12th).administrative report including Technical Reports nos. 233 to 256

Description: Report includes the National Advisory Committee for Aeronautics letter of submittal to the president, congressional report, summaries of the committee's activities and research accomplished, bibliographies, and financial report.
Date: January 1, 1927
Partner: UNT Libraries Government Documents Department

Annual report of the National Advisory Committee for Aeronautics (13th).administrative report including Technical Reports nos. 257 to 282

Description: Report includes the National Advisory Committee for Aeronautics letter of submittal to the President, Congressional report, summaries of the committee's activities and research accomplished, bibliographies, and financial report.
Date: January 1, 1928
Partner: UNT Libraries Government Documents Department

Annual report of the National Advisory Committee for Aeronautics (14th).administrative report including Technical Reports nos. 283 to 308

Description: Report includes the National Advisory Committee for Aeronautics letter of submittal to the president, congressional report, summaries of the committee's activities and research accomplished, bibliographies, and financial report.
Date: January 1, 1929
Partner: UNT Libraries Government Documents Department

Annual report of the National Advisory Committee for Aeronautics (5th).administrative report including Technical Reports nos. 51 to 82

Description: Report includes the National Advisory Committee for Aeronautics letter of submittal to the President, Congressional report, summaries of the committee's activities and research accomplished, expenditures, and a compilation of technical reports produced.
Date: 1920
Partner: UNT Libraries Government Documents Department

Annual report of the National Advisory Committee for Aeronautics (6th).administrative report including Technical Reports nos. 83 to 110

Description: Report includes the National Advisory Committee for Aeronautics letter of submittal to the President, Congressional report, summaries of the committee's activities and research accomplished, expenditures, House of Representatives bill 14061, a copy of the bill introduced to the House of Representatives to regulate air navigation, and a compilation of technical reports produced.
Date: 1921
Partner: UNT Libraries Government Documents Department

Annual report of the National Advisory Committee for Aeronautics (4th).administrative report including Technical Reports nos. 24 to 50

Description: Report includes the National Advisory Committee for Aeronautics letter of submittal to the President, Congressional report, summaries of the committee's activities and research accomplished, expenditures, problems, recommendations, and a compilation of technical reports produced.
Date: 1920
Partner: UNT Libraries Government Documents Department

The factors that determine the minimum speed of an airplane

Description: The author argues that because of a general misunderstanding of the principles of flight at low speed, there are a large number of airplanes that could be made to fly several miles per hour slower than at present by making slight modifications. In order to show how greatly the wing section affects the minimum speed, curves are plotted against various loadings. The disposition of wings on the airplane slightly affects the lift coefficient, and a few such cases are discussed. Another factor that has an effect on minimum speed is the extra lift exerted by the slip stream on the wings. Also discussed are procedures to be followed by the pilot, especially with regard to stick movements during low speed flight. Also covered are stalling, yaw, rolling moments, lateral control, and the effectiveness of ailerons and rudders.
Date: March 1, 1921
Creator: Norton, F. H.
Partner: UNT Libraries Government Documents Department

Theory of Lifting Surfaces, Part 2

Description: A mathematical model is presented towards a theory of lifting and resistance on wings. It consists of a theory of multiplanes, conditions of flow at a great distance from the wing, lifting systems of minimum resistance, and free stream and stream limited by walls.
Date: August 1, 1920
Creator: Prandtl, L.
Partner: UNT Libraries Government Documents Department

Wind tunnel tests on airfoil boundary control using a backward opening slot

Description: This report presents the results of an investigation to determine the effect of boundary layer control on the lift and drag of an airfoil equipped with a backward opening slot. Various slot locations, widths of opening, and pressures, were used. The tests were conducted in the Five-Foot Atmospheric Wind Tunnel of the Langley Memorial Aeronautical Laboratory. The greatest increase in maximum lift was 96 per cent, the greatest decrease in minimum drag was 27 per cent, and the greatest increase in the ratio, maximum lift coefficient/minimum drag coefficient, was 151 per cent.
Date: October 1, 1929
Creator: Knight, Montgomery & Bamber, Millard J
Partner: UNT Libraries Government Documents Department

Wind tunnel tests on an airfoil equipped with a split flap and a slot

Description: The investigation described in this report is concerned with the changes in the aerodynamic characteristics of an airfoil which are produced by a gauze-covered suction slot, located near the leading edge, and connected by an air passage to a split flap at the trailing edge. The tests were conducted at the Langley Memorial Aeronautical Laboratory. At the larger values of lift coefficient where the action of the slot might be expected to be most effective, the pressure differences were such that the air flowed out of the slot rather than in through it, and in consequence, the maximum lift coefficient was decreased.
Date: October 1, 1929
Creator: Bamber, Millard J
Partner: UNT Libraries Government Documents Department

Soaring flight in Guinea

Description: The term soaring is applied here to the flight of certain large birds which maneuver in the air without moving their wings. The author explains the methods of his research and here gives approximate figures for the soaring flight of the Egyptian Vulture and the African White backed Vulture. Figures are given in tabular form for relative air speed per foot per second, air velocity per foot per second, lift/drag ratio, and selected coefficients. The author argues that although the figures given were taken from a very limited series of observations, they have nevertheless thrown some light on the use by birds of the internal energy of the air.
Date: August 1, 1920
Creator: Idrac, P.
Partner: UNT Libraries Government Documents Department

The determination of the effective resistance of a spindle supporting a model airfoil

Description: An attempt was made to determine the effect of spindle interference on the lift of the airfoil by measuring moments about the axis parallel to the direction of air flow. The values obtained are of the same degree as the experimental error, and for the present this effect will be neglected. The results obtained using a U.S.A. 15 wing (plotted here) show that the correction is nearly constant from 0 degrees to 10 degrees incidence and that at greater angles its value becomes erratic. At such angles, however, the wing drag is so high that the spindle correction and its attendant errors become relatively small and unimportant.
Date: January 1, 1921
Creator: Davidson, W E & Bacon, D L
Partner: UNT Libraries Government Documents Department

Determination of the lift and drag characteristics of an airplane in flight

Description: Flight tests to determine lift and drag characteristics are discussed. A review is given of the fundamental principles on which the tests are based and on the forces acting on an airplane in the various conditions of steady flight. Glide with and without propeller thrust and the relation between angle of attack and the indicated airspeed for different conditions of steady flight are discussed. The glide test procedure and the problem of the propeller are discussed.
Date: August 1, 1925
Creator: Green, Maurice W
Partner: UNT Libraries Government Documents Department

The determination of several spray characteristics of a high-speed oil engine injection system with an oscilloscope

Description: An investigation was conducted to determine the injection lag, duration of injection, and spray start and cut-off characteristics of a fuel injection system operated on an engine and injecting fuel into the atmosphere.
Date: September 1, 1928
Creator: Hicks, Chester W & Moore, Charles S
Partner: UNT Libraries Government Documents Department

The comparison of well-known and new wing sections tested in the variable density wind tunnel

Description: Three groups of airfoils have been tested in the variable density wind tunnel. The first group contains three airfoils. The second group is a systematic series of twenty-seven airfoils. The third group consists of several frequently used wing sections.
Date: May 1, 1925
Creator: Higgins, George J
Partner: UNT Libraries Government Documents Department