Technical Report Archive & Image Library (TRAIL) - 4,107 Matching Results

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Fatigue Tests on 1/8-inch Aluminum Alloy Rivets

Description: Note presenting an investigation of the fatigue characteristics of riveted joints in aluminum alloy sheet. The purpose of this report is to summarize all the results of fatigue tests that have been made to date in the Aluminum Research Laboratories of lap joints with 1/8-inch aluminum alloy rivets.
Date: February 1945
Creator: Andrews, H. J. & Holt, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Performance tests of wire strain gages 2: calibration factors in compression

Description: Report presenting the results of calibrations in axial compression over the strain range 0 to 0.0021 for 15 types of single element multistrand wire strain gages. The majority of gages showed significant differences between the calibration factors for strain increasing and strain decreasing. The majority of the gages were found to have slightly lower factors in compression than in tension.
Date: September 1945
Creator: Campbell, William R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effect of Aging Aircraft Structures on Magnesium Parts

Description: Note presenting an analysis of a procedure for artificially aging assemblies and subassemblies to improve the strength properties of the wrought aluminum alloys comprising their principal structure. Information is given on the magnesium alloys which may be present. The forms in which magnesium alloys may be encountered are casings, extrusions, forgings, and sheet.
Date: April 1945
Creator: Winston, A. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Bearing strengths of 75S-T aluminum-alloy sheet and extruded angle

Description: Report presenting an investigation to determine the bearing yield and ultimate strengths of 75S-T alloy in sheet form in both with- and across-grain directions and extruded angle in the longitudinal direction. Ratios of bearing to tensile properties were also determined.
Date: February 1945
Creator: Wescoat, C. & Moore, R. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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An approximate method for determining the displacement effects and viscous drag of laminar boundary layers in two-dimensional hypersonic flow

Description: From Summary: "A simplified approximate theory is presented by means of which the laminar boundary layer over an insulated two-dimensional surface may be calculated, a linear velocity profile being assumed, and an estimate made of its effect in changing the pressure distribution over the profile upon which the boundary layer is formed. Skin friction is also determined. Comparisons of results from this theory are made with experimental results at a Mach number of 6.86 and a Reynolds number of 98… more
Date: September 1952
Creator: Bertram, Mitchel H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Chemical Action of Oils on Single Crystals of Metals

Description: Note presenting a study of the chemical action of oils on large single crystals of metals in the presence of various gases, with special emphasis placed on the influence of crystal plane. The studies primarily have been concerned with four metals: silver, copper, lead, and iron and four types of oil: pure hydrocarbons with mineral oil as representative, oiliness agents with stearic acid as representative, chemical polishing agents with tricresyl phosphate as representative, and commercial oils … more
Date: November 1945
Creator: Gwathmey, A. T.; Leidheiser, H. & Smith, G. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Nondestructive Measurement of Residual and Enforced Stresses by Means of X-Ray Diffraction 2: Some Applications to Aircraft Problems

Description: Note presenting tests on the use of x-ray diffraction methods for determining surface stress distributions in notched tensile bars and in the vicinity of a welded joint in aircraft steel tubing. Data on the effects of stress and degree of notching on the principal stresses and stress-concentration factors for flat notched tensile-test specimens were obtained.
Date: November 1945
Creator: Sachs, George; Smith, Charles S.; Lubahn, Jack D.; Davis, Gordon E. & Ebert, Lynn J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analytical study of transmission of load from skin to stiffeners and rings of pressurized cabin structure

Description: From Introduction: "The investigations in this paper were made to obtain more generalized mathematical analyses of monocoque structure subjected to internal pressure. It is also assumed that the principle of superposition can be applied, so that stress analysis of a structure with combined internal pressure and external load can be made without excessive complication."
Date: October 1945
Creator: Pian, Theodore Hsueh-Huang
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Column Strength of Extruded Magnesium Alloys AM-C58S and AM-C58S-T5

Description: "Tests have previously been made to determine the column strength of magnesium alloy AM-C58S-T5 extruded rod, but these few data were not considered a satisfactorily wide basis for establishing a general formula for the column strength of this alloy. It was therefore decided to make additional tests on a number of extruded sections of magnesium alloy AM-C58S-T5 with some tests on AM-C58S for comparison" (p. 1).
Date: December 1945
Creator: Leary, J. R. & Holt, Marshall
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Data on Material Properties and Panel Compressive Strength of a Plastic-Bonded Material of Glass Cloth and Canvas

Description: Results are presented of tests for determining the tensile, compressive, and bending properties of a material of plastic-bonding glass cloth and canvas layers. In addition, 10 panel specimens were tested in compression. Although the material is not satisfactory for primary structural use in aircraft when compared on a strength-weight basis with other materials in common use, there appears to be potential strength in the material that will require research for development. These points are consi… more
Date: December 1944
Creator: Zender, George W.; Schuette, Evan H. & Weinberger, Robert A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Tests of Airfoils Designed to Delay the Compressibility Burble

Description: Note presenting a method of deriving certain airfoil shapes that delay certain compressibility phenomena, and the aerodynamic data for a wide range of Mach numbers obtained from tests of the airfoils in the 24-inch high-speed tunnel. The airfoils, which are designated the NACA 16-series, have increased critical Mach number. Results regarding the airfoil comparison, critical speed, minimum drag, and use of the data are provided.
Date: December 1944
Creator: Stack, John
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Heat transfer from a hemisphere-cylinder equipped with flow-separation spikes

Description: Average heat-transfer, temperature-recovery, and pressure-distribution measurements were obtained over the hemispherical nose of a body of revolution both with and without flow-separation spikes. The tests, conducted in a range of Reynolds numbers from 1.55 to 9.85 x 10(5) and from Mach number 0.12 to 5.04, indicated that in supersonic flow the addition of spikes approximately doubles the rate of heat transfer, regardless of spike length.
Date: September 1954
Creator: Stalder, Jackson R. & Nielsen, Helmer V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Nondestructive Measurement of Residual and Enforced Stresses by Means of X-Ray Diffraction 1: Correlated Abstract of the Literature

Description: Note presenting a study of the stress measurements by means of the x-ray diffraction method, which have found considerable application in solving both commercial and laboratory problems. Two problems related to x-ray diffraction are studied and a literature review is conducted.
Date: September 1945
Creator: Sachs, George; Smith, Charles S.; Lubahn, Jack D.; Davis, Gordon E. & Ebert, Lynn J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Properties of some expanded plastics and other low-density materials

Description: Report presenting an investigation of various mechanical and physical properties of several expanded plastics and other low-density materials of interest for aircraft applications, such as heat insulation or the core of a sandwich material. The materials in the investigation included cellulose acetate plastic, polystyrene, a urea-formaldehyde resin, a zein product, hard rubber, balsa wood, and cellular glass.
Date: September 1945
Creator: Axilrod, Benjamin M. & Koenig, Evelyn
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Design and calibration of a total-temperature probe for use at supersonic speeds

Description: Report presenting a study of the factors involved in the design of total-temperature probes for use at supersonic speeds as applied to the design of an instrument to be used in wind-tunnel calibrations. Tests of the probe showed that the calibration factor required in the conversion of the measured temperature to the true total temperature was 0.992 for a range of Mach numbers.
Date: May 1949
Creator: Goldstein, David L. & Scherrer, Richard
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of detonation detector suitable for use in flight

Description: Report presenting an apparatus for making quantitative measurements of the vibrations excited by detonation in the cylinder head of an aircraft engine. The apparatus consisted of pick-up units, an amplifying system, and a cathode-ray oscillograph with a high-speed-camera recording system. A large number of records were taken under various operating conditions in a single-cylinder aircraft engine.
Date: December 1944
Creator: Draper, C. S.; Taylor, E. S.; Lancor, J. H. & Coffey, R. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Velocity Distribution on Wing Sections of Arbitrary Shape in Compressible Potential Flow 1: Circulatory Flows Obeying the Simplified Density-Speed Relation

Description: "As a first step toward the computation of the velocity distribution along a wing profile of arbitrary shape in a compressible fluid, the circulation-free flow around a symmetrical profile is treated under the assumption of the simplified density-speed relation due to Tchaplygin, Karman, and Tsien. The velocity distribution problem is reduced to a non-linear integral equation which is solved by a fairly rapidly convergent iteration method. Numerical examples are given" (p. 1).
Date: April 1946
Creator: Bers, Lipman
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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