National Advisory Committee for Aeronautics (NACA) - 324 Matching Results

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Table of interplanar spacings for crystal-structure determinations by X-ray diffraction with molybdenum, copper, cobalt, iron, and chromium radiations

Description: For a simple diffraction pattern, the time required to calculate interplanar distances from measurements of the pattern is not excessive. If more than a few lines are present, however, or if several patterns are to be studied, it is very advantageous to have available a table giving interplanar spacings directly in terms of the linear measurements made on the film of the lines appearing on the diffraction pattern. The preparation of the table given here was undertaken when the expansion of research activities involving X-ray diffraction techniques indicated that such a table would greatly decrease the time required to analyze diffraction patterns. The table was prepared for use with K alpha(sub 1) radiation from the following target materials: molybdenum, copper, cobalt, iron, and chromium.
Date: October 1, 1945
Creator: Kittel, J Howard
Partner: UNT Libraries Government Documents Department

Investigation of the Kingfisher XAUM-2 Flying Torpedo in the Langley Full Scale Tunnel, TED No. NACA DE 327

Description: Report presenting an investigation of a model of the Kingfisher XAUM-2 flying torpedo to determine the pressure recoveries within the jet engine nacelle and to determine the effects of several changes in model configuration on the aerodynamic characteristics of the model. The effectiveness of elevons and tabs as control devices was also investigated.
Date: October 6, 1949
Creator: Cocke, Bennie W. & Barnett, U. Reed
Partner: UNT Libraries Government Documents Department

Hydrodynamic Characteristics of a Low-Drag, Planing-Tail Flying-Boat Hull

Description: Report discussing the hydrodynamic characteristics of a flying boat with a low-drag, planing-tail hull compared with a conventional-type hull. The planing-tail model had more take-off stability than the conventional model and had lower hydrodynamic resistance. Information about the landing stability, variation of trim with speed, and spray characteristics is also provided.
Date: October 21, 1948
Creator: Suydam, Henry B.
Partner: UNT Libraries Government Documents Department

Investigation of a 1/7-scale powered model of a twin-boom airplane and a comparison of its stability, control, and performance with those of a similar all-wing airplane

Description: Report presenting an investigation of a powered model of a twin-boom airplane conducted in order to obtain a comparison of its stability, control, and performance characteristics with those of an all-wing-airplane design of the same overall proportions. The models represented very large airplanes with a gross weight of nearly 90 tons. Results regarding the static longitudinal stability and control, static directional stability and control, and performance estimates are provided.
Date: October 1948
Creator: Brewer, Gerald W. & May, Ralph W., Jr.
Partner: UNT Libraries Government Documents Department

Investigation of the variation of maximum lift for a pitching airplane model and comparison with flight results

Description: Report presenting the use of an apparatus utilizing a pitching airplane model to determine maximum wing loads as a function of the rate of change of angle of attack. A wind-tunnel and flight investigation were carried out and the results were compared.
Date: October 1948
Creator: Harper, Paul W. & Flanigan, Roy E.
Partner: UNT Libraries Government Documents Department

Investigation of NACA 65(sub 112) A111 (approx.) airfoil with 0.35-chord slotted flap at Reynolds numbers up to 25 million

Description: Report presenting an investigation in the two-dimensional low-turbulence tunnel and low-turbulence pressure tunnel to determine the highest maximum lift configurations of a slotted flap on an NACA 65(sub 112)A111 (approx.) airfoil section. The scale effects on aerodynamic characteristics were determined for a range of Reynolds numbers. Results regarding flap configurations, lift characteristics, pitching-moment characteristics, drag characteristics, and effects of leading-edge roughness are provided.
Date: October 1947
Creator: Racisz, Stanley F.
Partner: UNT Libraries Government Documents Department

Investigation of the effects of a nacelle on the aerodynamic characteristics of a swept wing and the effects of sweep on a wing alone

Description: Report presenting an investigation conducted to determine the effects of a nacelle on the aerodynamic characteristics of a swept wing and effects of sweep on a wing alone. The aerodynamic characteristics were determined from force and pressure measurements and tuft studies at a range of Mach numbers and angles of attack. Results regarding the force characteristics, pressure distributions, and visual observation of flow characteristics are provided.
Date: October 1948
Creator: Hieser, Gerald & Whitcomb, Charles F.
Partner: UNT Libraries Government Documents Department

A further investigation of the meteorological conditions conducive to aircraft icing

Description: Report presenting meteorological data from flight observations in icing conditions during the winter of 1946-47. Data on liquid water content, temperature, and mean-effective drop diameter are consistent with values previously proposed for maximum icing conditions. Results regarding the icing conditions in altostratus clouds, reexamination of previously proposed design conditions, relation between maximum liquid water content and temperature in layer clouds, typical icing conditions, maximum drop size, and drop-size distribution are provided.
Date: October 1947
Creator: Lewis, William; Kline, Dwight B. & Steinmetz, Charles P.
Partner: UNT Libraries Government Documents Department

Calculated effects of geometric dihedral on the low-speed rolling derivatives of swept wings

Description: Report presenting a simple theory to determine the effects of geometric dihedral angle on the rolling derivatives of swept wings. Equations and charts are given to show these effects. A comparison of experimental and theoretical results for the theory are provided.
Date: October 1948
Creator: Queijo, M. J. & Jaquet, Byron M.
Partner: UNT Libraries Government Documents Department

Aerodynamic characteristics of 15 NACA airfoil sections at seven Reynolds numbers from 0.7 x 10(exp 6) to 9.0 x 10(exp 6)

Description: Report presenting an investigation of the two-dimensional aerodynamic characteristics of 15 NACA airfoils at four Reynolds numbers. The results indicate that the drag coefficient at the design lift coefficient and the maximum lift coefficient are the most important aerodynamic characteristics and are most affected by Reynolds number changes.
Date: October 1949
Creator: Loftin, Laurence K., Jr. & Smith, Hamilton A.
Partner: UNT Libraries Government Documents Department