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The Effect of Artificial Aging on the Tensile Properties of Alclad 24S-T and 24S-T Aluminum Alloy

Description: "An experimental study was made to determine the effect of artificial aging on the tensile properties of alclad 24S-T and 24S-T aluminum-alloy sheet material. The results of the tests show that certain combinations of aging time and temperature cause a marked increase in the yield strength and a small increase in the ultimate strength; these increases are accompanied by a very large decrease in elongation. A curve is presented that shows the maximum yield strengths that can be obtained by aging… more
Date: August 1943
Creator: Kotanchik, Joseph N.; Woods, Walter & Zender, George W.
Partner: UNT Libraries Government Documents Department
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The Effect of Angle of Bend Between Plate Elements on the Local Instability of Formed Z-Sections

Description: "Thirty-nine Z-sections formed from 24S-T aluminum-alloy sheet with the angle of bend between the flanges and the web varying from 5 degrees to 120 degrees were tested as columns. Angles of bend from 30 degrees to 120 degrees had little or no effect on the critical stress or on the average stress at maximum load for local instability of the columns. The lengths of the columns were such that at angles of bend below 30 degrees they failed by Euler buckling" (p. 1).
Date: September 1944
Creator: Roy, J. Albert & Schuette, Evan H.
Partner: UNT Libraries Government Documents Department
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Progress Report on Fatigue of Spot-Welded Aluminum

Description: Report presenting a detailed account of approximately half of the work planned for a specified contract. The work called for fatigue tests on three simple but basic types of spot-welded test pieces made from 24S-T alclad. The primary purpose of the investigation was determining the mechanism of fatigue failures in the different types of test pieces.
Date: February 1943
Creator: Russell, H. W. & Jackson, L. R.
Partner: UNT Libraries Government Documents Department
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The Longitudinal Shear Strength Required in Double-Angle Columns of 24S-T Aluminum Alloy

Description: "Tests were made of riveted double-angle columns to determine the total rivet strength that is required to make these built-up columns develop the strength predicted by the standard column formulas. Results of the tests led to the conclusion that the required rivet strength may be calculated by the beam method of design" (p. 1).
Date: May 1943
Creator: Kuhn, Paul & Moggio, Edwin M.
Partner: UNT Libraries Government Documents Department
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Column and Plate Compressive Strengths of Aircraft Structural Materials: 24S-T Aluminum-Alloy Sheet

Description: "Column and plate compressive strengths of 24S-T aluminum-alloy sheet were determined both within and beyond the elastic range from tests of thin-strip columns and from local-instability tests of formed Z-end channel-section columns. These tests are the first of a series in an extensive research investigation to provide data on the structural strength of various aircraft materials. The results, which are presented in the form of curves and charts that may be used in the design and analysis of a… more
Date: June 1945
Creator: Lundquist, Eugene E.; Schuette, Evan H.; Heimerl, George J. & Roy, J. Albert
Partner: UNT Libraries Government Documents Department
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Column and plate compressive strengths of aircraft structural materials: extruded 24S-T aluminum alloy

Description: Report presenting column and plate compressive strengths of extruded 24S-T aluminum alloy determined both within and beyond the elastic range from tests of thin-strip columns and local-instability tests of H-, Z-, and channel-section columns. The tests are part of a research investigation to provide data on the structural strength of various aircraft materials. Results regarding compressive stress-strain curves and column and plate compressive strengths are provided.
Date: July 1945
Creator: Heimerl, George J. & Roy, J. Albert
Partner: UNT Libraries Government Documents Department
open access

Column and plate compressive strengths of aircraft structural materials: extruded 75S-T aluminum alloy

Description: Report presenting column and plate compressive strengths of extruded 75S-T aluminum alloy both within and beyond the elastic range from tests of thin-strip columns and local-instability tests of H-, Z-, and channel-section columns. The tests are part of an extensive research investigation to provide data on the structural strength of various aircraft materials. Results regarding compressive stress-strain curves and column and plate compressive strengths are provided.
Date: July 1945
Creator: Heimerl, George J. & Roy, J. Albert
Partner: UNT Libraries Government Documents Department
open access

Fatigue Characteristics of Spot-Welded 24S-T Aluminum Alloy

Description: Report presenting the results of an investigation of the fatigue characteristics of spot-welded 24S-T aluminum alloy. The static shear strength of spot welds in lap joints of 24S-T alclad increases with increasing sheet thickness for thicknesses in the range of 0.025 inch to 0.032 inch.
Date: June 1943
Creator: Russell, H. W.; Jackson, L. R.; Grover, H. J. & Beaver, W. W.
Partner: UNT Libraries Government Documents Department
open access

Tests of 10-Inch 24S-T Aluminum-Alloy Shear Panels With 1-1/2-Inch Holes

Description: Report discusses the results of testing on "10-inch shear panels of 24S-T aluminum alloy with 1.5 inch holes to determine the stress concentration at static rupture and the deformation characteristics" (from Summary). The strength of the perforated specimens is compared to the solid specimens and the critical stresses are computed. The stress at which permanent set occurs was also measured.
Date: June 1943
Creator: Kuhn, Paul & Levin, L. Ross
Partner: UNT Libraries Government Documents Department
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Knock-Limited Blending Characteristics of Blends of Triptane and 28-R Aviation Fuel

Description: "F-3 and F-4 knock data are presented for blends of 0, 20, 40, 60, and 80 percent by volume of triptane in 28-R reference fuel plus approximately 4.6 ml TEL per gallon in the final blends. For comparison of knock-limited performance, 28-R reference fuel containing 2.7 percent by volume of xylidines and leaded to 6 ml TEL per gallon is included. In order to provide information on temperature sensitivities, two sets of modified conditions were used in addition to the standard F-4 engine condition… more
Date: April 1944
Creator: Evvard, John C.; Imming, Harry S. & Genco, Russell S.
Partner: UNT Libraries Government Documents Department
open access

Knock-limited performance of blends of AN-F-28 fuel containing 2 percent aromatic amines 1

Description: Report presenting tests to investigate the effect of 2-percent additions of 11 aromatic amines on the knock-limited performance of AN-F-28 fuel. A total of 48 aromatic amines are being prepared for knock tests. Results regarding the knock-limited performance data, antiknock effectiveness, and knock-limited powers are provided.
Date: April 1944
Creator: Branstetter, J. Robert
Partner: UNT Libraries Government Documents Department
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Knock-limited performance of blends of AN-F-28 fuel containing 2 percent aromatic amines 2

Description: Report presenting testing to investigate the effects of 2-percent additions of nine aromatic amines on the knock-limited performance of AN-F-28 (28-R) fuel. The p-toluidine and p-tert-butylaniline gave the best overall improvement in the knock-limited power of the fuel.;
Date: June 1944
Creator: Tower, Leonard K.
Partner: UNT Libraries Government Documents Department
open access

Knock-limited performance of blends of AN-F-28 fuel containing 2 percent aromatic amines 3

Description: Report presenting tests to investigate the effect of 2-percent additions of nine aromatic amines on the knock-limited performance of AN-N-28 (28-R) fuel. The results of the testing of antiknock effectivneess of the 27 aromatic amines obtained to date in the program are also summarized.
Date: August 1944
Creator: Alquist, Henry E. & Tower, Leonard K.
Partner: UNT Libraries Government Documents Department
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Knock-Limited Performance of Blends of AN-F-28 Fuel Containing 2 Percent Aromatic Amines 4

Description: Report discussing tests on the effect of 2-percent additions of 13 aromatic amines on the knock-limited performance of 28-R fuel in a CFR engine. The amines tested gave good rich mixture response at standard F-4 operating conditions, but were sensitive to engine severity at lean fuel-air ratios.
Date: December 21, 1944
Creator: Alquist, Henry E. & Tower, Leonard K.
Partner: UNT Libraries Government Documents Department
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Effect of an aromatic mixture added to two 100-octane fuels on engine temperatures and fuel consumption

Description: Report presenting tests conducted with an air-cooled cylinder on two fuels rated at approximately 100-octane number by the C.F.R. aviation method with and without a 40-percent addition of an aromatic mixture. The aromatic mixture consisted of 50 percent toluene, 37.5 percent xylene, and 12.5 percent benzene. Results regarding engine performance and engine temperature are provided.
Date: June 1942
Creator: Krsek, Alois, Jr. & Jones, Anthony W.
Partner: UNT Libraries Government Documents Department
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Maximum permissible engine performance of eight representative fuels of 100-octane number

Description: Report presenting knock-limited performance tests made with eight representative fuels rated at 100-octane number using the CFR aviation method. All eight fuels were mixtures of representative blending agents and bases. Results regarding the effect of inlet-temperature air changes, effect of octane numbers in a full-scale single-cylinder engine, effect of addition of aromatics to the fuels, and type of spark plug used are provided.
Date: January 1942
Creator: Rothrock, Addison M.; Biermann, Arnold E. & Corrington, Lester C.
Partner: UNT Libraries Government Documents Department
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Effect of additions of aromatics on the knocking characteristics of several 100-octane fuels at two engine speeds

Description: Report presenting testing at two engine speeds on six representative fuels rated at 100-octane number by the C.F.R. aviation method. Blends of the fuels with benzene, toluene, xylene, and isopropyl comprise nine other fuels, leading to testing on 15 fuels. Results regarding the tests at 2000 rpm and 250 degrees Fahrenheit inlet-air temperature, at 3100 rpm and 250 degrees Fahrenheit inlet-air temperature, 2000 rpm and 150 degrees Fahrenheit inlet-air temperature, and 3100 rpm and 150 degrees Fa… more
Date: May 1942
Creator: Biermann, Arnold E.; Corrington, Lester C. & Harries, Myron L.
Partner: UNT Libraries Government Documents Department
open access

Heat-Transfer Tests of Several Engine Coolants

Description: Report presenting the relative cooling performance of water, commercial Prestone, and several ethylene-glycol and diethylene-glycol derivatives obtained from tests conducted with a small electrically heated heat exchanger.
Date: February 1945
Creator: Manganiello, E. J. & Stalder, J. R.
Partner: UNT Libraries Government Documents Department
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Foaming of Aircraft-Engine Oils as a Problem in Colloid Chemistry - 1

Description: Report presenting an investigation conducted on the foaming characteristics of representative aircraft-engine lubricants in order to arrive at an adequate theory of the foaming of such oils. Methods of measuring foaming are compared and analyzed for their significant factors.
Date: September 1944
Creator: McBain, J. W.; Ross, S.; Brady, A. P.; Robinson, J. V.; Abrams, I. M.; Thorburn, R. C. et al.
Partner: UNT Libraries Government Documents Department
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Breaking Aircraft-Engine Oil Foams by Use of Electrically Charged Condenser Plates

Description: Report presenting a determination of the effectiveness of a charged condenser for breaking oil foams and to obtain data on which to base the design of such a device for mounting at the oil-tank inlet of an airplane. Results regarding the condenser-plate area and arrangement, wet-plate design, condenser voltage, oil temperature, water in oil, and some safety considerations are provided.
Date: November 1944
Creator: Pinkel, I. Irving
Partner: UNT Libraries Government Documents Department
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Effect of Carburetor-Mixture-Control and Supercharger Characteristics on Fuel Knock Under Simulated Sea-Level Flight Conditions

Description: Report presenting knock-limit data recorded for a current 100-octane-number aviation gasoline in a full-scale single-cylinder test engine. Inlet-air temperatures were the temperatures estimated from a consideration of the temperature increase through an aircraft-engine supercharger. The data indicate that the relation of the carburetor-mixture-control characteristics to the knock characteristics of the fuel is an important factor in determining knock-free operation.
Date: March 1943
Creator: Rothrock, Addison M. & Wear, Jerrold D.
Partner: UNT Libraries Government Documents Department
open access

Supercharged-Engine Knock Tests of Methyl Tert-Butyl Ether

Description: Report presenting data that show the knock-limited performance of methyl tert-butyl ether obtained from tests made in a 17.6-cubic-inch-displacement engine under supercharged conditions. Tests for temperature sensitivity, speed sensitivity, and lead susceptibility were made on a blend of 20 percent methyl tert-butyl ether and 80 percent S-2 reference fuel.
Date: August 1944
Creator: Barnett, Henry C. & Slough, James W., Jr.
Partner: UNT Libraries Government Documents Department
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The Low-Temperature Solubility of Aniline, the Toluidines and Some of Their N-Alkyl Derivatives in Aviation Gasoline

Description: Report presenting testing to determine the solubilities in gasoline at low temperatures of 15 aromatic amines from the NACA exploratory program as antiknock additives. The solubility data is summarized in a table by interpolating or extrapolating experimental results to obtain solubility at -60 degrees Celsius.
Date: June 1944
Creator: Olson, Walter T. & Kelly, Richard L.
Partner: UNT Libraries Government Documents Department
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