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Measurements of Lift Fluctuations Due to Turbulence

Description: Note presenting a study of the fluctuating lift of a rigid wing in turbulent flow and the power spectra of the lift and turbulent fluctuations. Using these measurements, the aerodynamic admittance of the wing was obtained. Results regarding the infinite wing and aspect-ratio effect are provided.
Date: March 1957
Creator: Lamson, P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Seaplanes for Commerce

Description: The advantages of using seaplanes for commercial purposes is discussed. The three primary advantages described include their superior speeds over existing means of transport on the same routes, the available landing fields when flying over the water, and the reduction of distance from the airport to the city is serves due to the seaplane's ability to land in water.
Date: March 1923
Creator: Warner, Edward P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Further Studies of the Mechanism by Which Hydrogen Enters Metals During Chemical and Electrochemical Processing

Description: Note presenting studies of the entry of hydrogen into metals from chemical and electrochemical action, which occurs when hydrogen-metal alloy formation is simultaneous with discharge (or release) of hydrogen atoms. Results of some new experimental investigations and some correlations with other studies are provided.
Date: March 1954
Creator: McGraw, L. D.; Ditmars, W. E.; Snavely, C. A. & Faust, C. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effect of overheating on creep-rupture properties of M-252 alloy

Description: Report presenting a study on the influence of periodic overheats of 2-minutes duration to four different temperatures on the creep-rupture properties of M-252 alloy at 1500 degrees Fahrenheit. The purpose of the study was to provide information regarding the estimation of the effects of overheating on creep-rupture performance of gas-turbine parts. Results regarding normal rupture properties of experimental materials, overheats on heat HT-28, overheats on heats 837 and 43642, comparative effect… more
Date: March 1958
Creator: Rowe, John P. & Freeman, J. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Investigation of Stress Distribution in Rectangular Plates With Longitudinal Stiffeners Under Axial Compression After Buckling

Description: Note presenting an investigation carried out to study the elastic behavior after buckling of a rectangular plate reinforced with longitudinal stiffeners and subjected to compressive loads in a direction parallel to the stiffeners. Two possible buckling modes were investigated.
Date: March 1952
Creator: Wang, Chi-Teh & Zukerberg, Harry
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Wall Pressure Fluctuations in a Turbulent Boundary Layer

Description: Note presenting an investigation of sound generation that is generated by turbulence on a solid surface. Suitable equipment has been developed to measure the fluctuating wall pressure in the turbulent boundary layer. Results regarding the response of the transducer in a laminar and turbulent boundary layer, power-spectrum measurements, and mean-square pressure measurements are provided.
Date: March 1958
Creator: Willmarth, William W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Two-Dimensional Subsonic Flow Past Elliptic Cylinder by the Variational Method

Description: "A method of solution is presented for compressible fluid flow past an elliptical cylinder by means of the variational method. The solution is obtained as a function of thickness ratio and free-stream Mach number. Numerical examples are carried out for several thickness ratios and Mach numbers and the results are compared with those obtained by other methods" (p. 1).
Date: March 1952
Creator: Rao, G. V. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Generalized Linearized Conical Flow

Description: Note presenting a basic theory of generalized linearized supersonic conical flow for both inside and outside the Mach cone, which was developed and applied to several specific problems including unsteady-flow conditions. A triangular lifting wing in pitching and rolling with both subsonic and supersonic leading edges was investigated and pressure coefficients were obtained.
Date: March 1951
Creator: Hayes, W. D.; Roberts, R. C. & Haaser, N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Thermal Conductance of Contacts in Aircraft Joints

Description: Note presenting tests conducted to determine the factors influencing the thermal conductance across the interference between 75S-T6 aluminum-alloy and AISI Type 416 stainless-steel structural joints. The type of joints investigated included: bare metal-to-metal contact, contact surfaces coated with zinc-chromate primer, contact surfaces separated by thin foils of good conductors, contact surfaces separated by thin sheets of insulation, contact surfaces joined by strength-giving bonds, and rivet… more
Date: March 1954
Creator: Barzelay, Martin E.; Tong, Kin Nee & Hollo, George
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Ion Tracer Technique for Airspeed Measurement at Low Densities

Description: Note presenting a study of the aerodynamic and production-detection problems associated with ion tracer velocity measurement techniques, with particular emphasis on those aspects unique to low-density gas dynamics. A critical survey was made of the various techniques which have been employed and specific suggestions are offered relative to the successful use of ion tracer velocity measuring methods at low densities.
Date: March 1954
Creator: Kunkel, W. B. & Talbot, L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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New Albatross Commercial Airplane "L 58"

Description: The "L 58" is a monoplane with cantilever wings joined directly to the fuselage. It accordingly belongs to the new school of airplane construction, as founded and developed in Germany. A list of performance characteristics is included.
Date: March 1923
Creator: Meyer, G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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On subsonic compressible flows by a method of correspondence I - methods for obtaining subsonic circulatory compressible flows about two-dimensional bodies

Description: From Summary: "By means of the general solutions of the hodograph equations for compressible fluids, certain solutions corresponding to solutions of the hodograph equations of an incompressible fluid are used to find flow patterns of compressible fluids. When the adiabatic equation of state is used, only a general method is outlined. The method appears to lead to the solution of the problem of subsonic flows with circulation around arbitrary bodies, as the method of Theodorsen does for incompre… more
Date: March 1947
Creator: Gelbart, Abe
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Comparative Tests on Extruded 14S-T and Extruded 24S-T Hat-Shape Stiffener Sections

Description: Note presenting an investigation to compare the 14S-T with 24S-T in extruded stiffeners for stiffened flat sheet panels. The tests were made with stiffened flat sheet panels with three hat-shape stiffeners. Data is provided on the strength of the two alloys as well as the effect of sheet thickness on relative stiffener strengths.
Date: March 1947
Creator: Holt, Marshall & Feil, G. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Radioautographic Method for Examining Distribution of Particles in a Cyclotron Beam

Description: Note presenting a radioautographic method that may be used as a convenient method for examining the distribution of particles in a cyclotron beam. The experiments in this report establish the feasibility of the photographic method by showing that the photographic density produced by an active sample is proportional to the beta-ray activity of the sample.
Date: March 1952
Creator: Pool, M. L. & Fultz, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Supersonic Conical Flow

Description: "A method is described for the solution of the nonlinear equations for supersonic conical flow. The procedure is mostly a numerical one based on the method of characteristics and the relaxation process. A procedure for calculating the position of the shock is inherent in the analysis. The method is applicable to any conical flow" (p. 1).
Date: March 1952
Creator: Maslen, Stephen H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Critical study of integral methods in compressible laminar boundary layers

Description: Report presenting a number of the most promising integral methods for solving approximately the compressible-laminar-boundary-layer equations in order to determine a computationally convenient and sufficiently accurate method of calculating boundary-layer characteristics. Approximate solutions can be obtained by assuming special forms for the velocity profiles satisfying various boundary conditions and containing, in practice, either one or two parameters to be determined by the equations.
Date: March 1952
Creator: Libby, Paul A.; Morduchow, Morris & Bloom, Martin
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A collection of the collapsed results of general tank tests of miscellaneous flying-boat-hull models

Description: Presented here are the summary charts of the collapsed results of general tank tests of about 100 flying boat hull models. These summary charts are intended to be used as an engineering tool to enable a flying boat designer to grasp more quickly the significance of various hull form parameters as they influence his particular airplane. The form in which the charts are prepared is discussed in some detail in order to make them clearer to the designer. This is a data report, and no attempt has be… more
Date: March 1947
Creator: Locke, F. W. S., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Fatigue strengths of aircraft materials: axial load fatigue tests on unnotched sheet specimens of 24S-T3 and 75S-T6 aluminum alloys and of SAE 4130 steel

Description: Report presenting information on the axial-load fatigue behavior of unnotched specimens of 24S-T3 and 75S-T6 aluminum alloys and normalized SAE 4130 steel. The primary objectives of the investigation were to determine fatigue strengths and measurements of damage due to stress level are provided. Results regarding static strength tests, fatigue strength tests, fatigue damage tests, and results at high and low speeds are provided.
Date: March 1951
Creator: Grover, H. J.; Bishop, S. M. & Jackson, L. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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An investigation of aircraft heaters 33: experimental determination of thermal and hydrodynamical behavior of air flowing along finned plates

Description: Report presenting an experimental investigation on the thermal and hydrodynamical behavior of air flowing along a steam-heated plate to which were attached cylindrical fins. The data indicate that the principal criterion for the application of the equations for heat transfer along unfinned flat plates is the initiation of a thermal boundary layer.
Date: March 1950
Creator: Boelter, L. M. K.; Leasure, R.; Romie, F. E.; Sanders, V. D.; Elswick, W. R. & Young, G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Bending Tests of Circular Cylinders of Corrugated Aluminum-Alloy Sheet

Description: "Bending tests were made of two circular cylinders of corrugated aluminum-alloy sheet. In each test failure occurred by bending of the corrugations in a plane normal to the skin. It was found, after analysis of the effect of short end bays, that the computed stress on the extreme fiber of a corrugated cylinder is in excess of that for a flat panel of the same basic pattern and panel length tested as a pin-ended column. It is concluded that this increased strength was due to the effects of curva… more
Date: March 1937
Creator: Niles, Alfred S.; Buckwalter, John C. & Reed, Warren D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Elastic properties of channels with unflanged lightening holes

Description: Report presenting testing of fifty-eight lightened and five unlightened aluminum-alloy channels as simply supported beams in pure or simple bending produced by loads parallel to the plane of symmetry, and fifty-three lightened and four unlightened aluminum-alloy channels with loads parallel to the back. Four types of testing occurred with various types of support and loading.
Date: March 1944
Creator: Niles, Alfred S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analysis of Deep Rectangular Shear Web Above Buckling Load

Description: From Introduction: "An analysis of a square web above the buckling load was presented in reference 1. The analysis of reference 1 therefore was repeated for a shear web with depth/width = 2.5. Comparison of the results with those for the square web then would indicate the effect in the depth-width ratio."
Date: March 1946
Creator: Levy, Samuel; Woolley, Ruth M. & Corrick, Josephine N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Tensile, Fatigue, and Creep Properties of Forged Aluminum Alloys at Temperatures Up to 800 F

Description: Note presenting data on the tensile strength, fatigue strength, creep properties, and thermal expansion of forged aluminum alloys XB18S, 18S, 24S, and 32S, which are pertinent to the application of these alloys in the temperature range from 70 to 800 degrees Fahrenheit. The paper also includes a critical discussion of the data and its application to design of aircraft engines.
Date: March 1948
Creator: Jackson, L. R.; Cross, H. C. & Berry, J. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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