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Texas Attorney General Opinions
575
Technical Report Archive and Image Library
561
National Advisory Committee for Aeronautics Collection
423
World War Two Collection
115
TRAIL Microcard Collection
95
Office of Scientific & Technical Information Technical Reports
77
World War Two Newsmaps
52
Government Documents A to Z Digitization Project
44
USGS Topographic Map Collection
37
World War Poster Collection
30
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NACA Wartime Reports
310
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119
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72
NACA Advanced Confidential Reports
70
Atomic Energy Commission Reports
60
Newsmap
52
NACA Technical Reports
47
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46
Chicago University Reports
46
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42
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1,419 Matching Results
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The Effects of Roughness at High Reynolds Numbers on the Lift and Drag Characteristics of Three Thick Airfoils
"In connection with studies of airfoils applicable to large high-speed aircraft, the effects of roughness on three 22-percent-thick airfoils were investigated. The tests were made over a range of Reynolds number from about 6 to 26 x 10(exp 6) for the airfoils smooth and with roughness strips applied to the surfaces. The results indicated that for the roughened models the scale effect was generally favorable" (p. 1).
Date:
August 1944
Creator:
Abbott, Frank T., Jr. & Turner, Harold R., Jr.
Object Type:
Report
System:
The UNT Digital Library
The Theory of a Free Jet of a Compressible Gas
"In the present report the theory of free turbulence propagation and the boundary layer theory are developed for a plane-parallel free stream of a compressible fluid. In constructing the theory use was made of the turbulence hypothesis by Taylor (transport of vorticity) which gives best agreement with test results for problems involving heat transfer in free jets" (p. 1).
Date:
March 1944
Creator:
Abramovich, G. N.
Object Type:
Report
System:
The UNT Digital Library
Coal-Mine Accidents in the United States, 1942
Report compiled by the U.S. Bureau of Mines including statistics on fatal and non-fatal accidents in coal mines located in the United States as well as data regarding the various operations (e.g., number of miners employed and average production). The information is organized into tables for comparison and the text draws some overall conclusions in the summary.
Date:
1944
Creator:
Adams, W. W. & Geyer, L. E.
Object Type:
Report
System:
The UNT Digital Library
Metal- and Nonmetal-Mine Accidents in the United States During the Calendar Year 1941 (Excluding Coal Mines)
Report published by the U.S. Bureau of Mines regarding accidents at mines located in the United States for all operations except coal mines. The report includes statistics about the number and kinds of accidents as well as information about the mining operations (i.e., number of persons employed, average amount of work performed per person, etc.).
Date:
1944
Creator:
Adams, W. W. & Kennedy, F. J.
Object Type:
Report
System:
The UNT Digital Library
Coal-Mine Accidents in the United States, 1941
Report compiled by the U.S. Bureau of Mines including statistics on fatal and non-fatal accidents in coal mines located in the United States as well as data regarding the various operations (e.g., number of miners employed and average production). The information is organized into tables for comparison and the text draws some overall conclusions in the summary.
Date:
1944
Creator:
Adams, William W. & Geyer, L. E.
Object Type:
Report
System:
The UNT Digital Library
Quarry Accidents in the United States During the Calendar Year 1942
Report published by the U.S. Bureau of Mines which is a compilation of accidents in quarries located in the United States with data regarding the number and kinds of accidents as well as information about the mining operations (e.g., number of men employed, kinds of quarries, amount of work performed, etc.).
Date:
1944
Creator:
Adams, William W. & Wrenn, Virginia E.
Object Type:
Report
System:
The UNT Digital Library
Metallurgical Laboratory, Chemical Research - Radiation Chemistry, the Effect of Radiation on Water and Aqueous Solutions of Inorganic Substances
Technical report summarizing our knowledge of the chemical effects of ionizing radiation upon water and upon aqueous solutions of inorganic compounds. The types of radiation considered are beta rays, gamma and X rays, and heavy particles, notably neutrons, deuterons, alpha rays and fission recoils.
Date:
February 22, 1944
Creator:
Allen, A. O.
Object Type:
Report
System:
The UNT Digital Library
The Effect of Radiation on the Corrosion of Metals by Water
Technical report. Long-time tests have been made on the effect of various types of radiation on the corrosion of 2S aluminum in simulated W water. In no case was any acceleration of corrosion by the radiation observed; the effect of radiation, if any, appeared to be a protective one. Deuteron irradiation did accelerate the corrosion of mild steel at low flow rates in hot water of pH 6 to 7, but no appreciable effect was observed with copper, stainless steel, or tuballoy. The general theory of the effect of radiation on corrosion is discussed, with the conclusion that no acceleration of corrosion by radiation is to be expected in most cases of practical interest.
Date:
July 6, 1944
Creator:
Allen, A. O. (Augustine O.); Bowman, M. C.; Goldowski, Nathalie; Larson, R. G. & Treiman, L.
Object Type:
Report
System:
The UNT Digital Library
The Effect of Radiation on the Corrosion of Metals by Water. (Problem No. 322 MLC 2213)
Long-time tests have been made on the effect of various types of radiation on the corrosion of 2S aluminum in simulated W water. In no case was any acceleration of corrosion by the radiation observed; the effect of radiation, if any, appeared to be a protective one. Deuteron irradiation did accelerate the corrosion of mild steel at low flow rates in hot water of pH 6 to 7, but no appreciable effect was observed with copper, stainless steel, or tuballoy. The general theory of the effect of radiation on corrosion is discussed, with the conclusion that no acceleration of corrosion by radiation is to be expected in most cases of practical interest. (auth)
Date:
July 6, 1944
Creator:
Allen, A. O.; Bowman, M. C.; Goldowski, N.; Larson, R. G. & Treiman, L.
Object Type:
Report
System:
The UNT Digital Library
The sky's the limit! : keep buying war bonds.
Color poster of a female mechanic and two male mechanics maintaining or building an airplane. Other military airplanes can be seen on the ground in the background. A "6th War Loan" seal in the upper right corner of the poster depicts a bomb about to strike a Japanese flag.
Date:
1944
Creator:
Allen, Courtney, 1896-1969
Object Type:
Poster
System:
The UNT Digital Library
Wall interference in a two-dimensional-flow wind tunnel with consideration of the effect of compressibility
Report presenting tunnel-wall corrections for an airfoil of finite thickness and camber in a two-dimensional-flow wind tunnel. The theory takes account of the effects of the wake of the airfoil and of the compressibility of the fluid and is based on the assumption that the chord of the airfoil is small in comparison with the height of the tunnel. The theoretical results are compared with the small amount of low-speed experimental data available and agreement is seen to be satisfactory, even for relatively large values of the chord-height ratio.
Date:
December 1944
Creator:
Allen, H. Julian & Vincenti, Walter G.
Object Type:
Report
System:
The UNT Digital Library
Wall interference in a two-dimensional-flow wind tunnel, with consideration of the effect of compressibility
From Summary: "Theoretical tunnel-wall corrections are derived for an airfoil of finite thickness and camber in a two-dimensional-flow wind tunnel. The theory takes account of the effects of the wake of the airfoil and of the compressibility of the fluid, and is based upon the assumption that the chord of the airfoil is small in comparison with the height of the tunnel. Consideration is given to the phenomenon of choking at high speeds and its relation to the tunnel-wall corrections. The theoretical results are compared with the small amount of low-speed experimental data available and the agreement is seen to be satisfactory, even for relatively large values of the chord-height ratio."
Date:
1944
Creator:
Allen, H. Julian & Vincenti, Walter G.
Object Type:
Report
System:
The UNT Digital Library
The Knock-Limited Performance of Several Fuels Blended With S-2 Reference Fuel
Report discussing the results of testing conducted to determine the knock-limited performance of fuel blends containing 80 percent of S-2 reference fuel and 20 percent of several exploratory fuels. Butyl acetate, sec-butyl acetate, isopropyl acetate, sec-butyl alcohol, tert-butyl alcohol, isopropyl alcohol, cyclohexanol, methylcyclohexanol, isobutylcarbinol, sec-butylcarbinol, triethyl borate, and dimethylfuran were examined.
Date:
November 1944
Creator:
Alquist, Henry E.
Object Type:
Report
System:
The UNT Digital Library
Trends in Surface-Ignition Temperatures
Report discusses the variation of surface-ignition temperature with charge density, fuel-air ratio, and surface-ignition advance. Tests on several fuels were conducted on a supercharged CFR engine to determine surface-ignition temperature as a function of the three variables. It was concluded that surface-ignition temperature is not a satisfactory criterion for differentiating between preignition characteristics of different fuels.
Date:
September 1944
Creator:
Alquist, Henry E. & Male, Donald W.
Object Type:
Report
System:
The UNT Digital Library
The Effect of Compression Ratio on Knock Limits of High-Performance Fuels in a CFR Engine 1: Blends of Triptane and 28-R Fuel
Report discussing the knock-limited performance of blends of triptane and 28-R fuel in an F-4 engine at three sets of conditions and three compression ratios. The knock limits of the triptane blends were more sensitive to compression ratio than the 28-R fuel, and the sensitivities of the blends increased as the severity of other engine conditions increased.
Date:
October 1944
Creator:
Alquist, Henry E. & Tower, Leonard K.
Object Type:
Report
System:
The UNT Digital Library
Knock-limited performance of blends of AN-F-28 fuel containing 2 percent aromatic amines 3
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.
Object Type:
Report
System:
The UNT Digital Library
Knock-Limited Performance of Blends of AN-F-28 Fuel Containing 2 Percent Aromatic Amines 4
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.
Object Type:
Report
System:
The UNT Digital Library
Chemical Research — General Chemistry: Report for Period of February 1 to March 10, 1944
A report which investigated vacuum distilation, entrainer gas distillation, and entrainer gas plus bromine vapor distillation.
Date:
1944
Creator:
Ames Project
Object Type:
Report
System:
The UNT Digital Library
Tests of NACA 65(216)-420 and 66(218)-420 Airfoils at High Speeds
Report presenting wind tunnel tests of NACA 65(216)-420 and 66(218)-420 airfoils at speeds up to and slightly above the critical. Section coefficients of lift, drag, and pitching-moment and extensive pressure-distribution data are presented. The critical speed for these airfoils at their design life coefficient of 0.4 is shown to be about 460 miles per hour at seal level and about 415 miles per hour at 25,000 feet altitude.
Date:
April 10, 1944
Creator:
Anderson, Joseph L.
Object Type:
Report
System:
The UNT Digital Library
Sealing of Holes in Aluminum Sheet by Oxidation
Aluminum oxide occupies a larger volume than the aluminum it contains would fill as metal, consequently, the assumption has been made that holes in metallic aluminum would close by a sufficient amount of oxidation. Therefore, we were asked to investigate the rate of plug formation under conditions to be expected in the pile. For the latter we were requested to approach the pile conditions as nearly as we could by employing the Chicago cyclotron. It seems to us that the problem divides itself into two separate questions: (1) under what conditions may holes be expected to close? (2) if holes do close how much corrosion of uranium may be expected before the closure becomes impervious to water vapor? In this report only the first question is considered. The experiments and theory coupled with the data collected by other workers on the project definitely define the limits within which pores in the aluminum cans may be expected to close by an oxidation process. Under the most favorable conditions only small holes may be sealed in this manner. In the large majority of the cases the holes not only fail to close but become larger.
Date:
July 15, 1944
Creator:
Anderson, S. & Goldowski, N.
Object Type:
Report
System:
The UNT Digital Library
Maximum Lift Coefficients of Airplanes Based on Sum of Wing and Tail Areas
Report discusses the maximum lift coefficients for conventional and tailless airplanes in the gliding and landing conditions. Three areas are used to calculate the coefficients: wing area alone, wing area plus horizontal-tail area, and wing area plus horizontal- and vertical-tail areas.
Date:
March 1944
Creator:
Ankenbruck, Herman O.
Object Type:
Report
System:
The UNT Digital Library
Preparation of U233
Technical report. The object of the research is to determine the procedure and equipment for the preparation of U233 on a semi-works scale. The general proposed procedure is that thorium carbonate in aluminum cans will be irradiated with pile neutrons. The Pa233 resulting from neutron absorption the Th232 and the decay of Th233 will be extraction from 99% of the thorium and the natural U in thorium by MnO2 precipitations. The Pa233 will then be allowed to decay to U233 which in turn will be isolated from the remaining Th and partially decayed Pa233 by ether extraction.
Date:
May 16, 1944
Creator:
Apple, R. S.
Object Type:
Report
System:
The UNT Digital Library
Neutron Emission by Polonium Oxide Layers
The following report calculates how many neutrons are produced by the O-16([alpha]-n) reaction in a thin and uniform polonium oxide layer.
Date:
August 8, 1944
Creator:
Argo, M. & Teller, E.
Object Type:
Report
System:
The UNT Digital Library
Analyses of Pennsylvania Anthracitic Coals
Report issued by the Bureau of Mines discussing the anthracite coal fields of Pennsylvania. History, geology, and mining methods of the anthracite fields are presented. This report includes tables, illustrations, and maps.
Date:
1944
Creator:
Ashley, George H.; Toenges, Albert L.; McElroy, G. E.; Siclen, M. Van; Buch, J. W.; Snyder, N. H. et al.
Object Type:
Report
System:
The UNT Digital Library