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NACA Research Memorandums
485
Atomic Energy Commission Reports
266
NACA Technical Notes
259
United States Geological Survey Reports
221
Trace elements investigations report
109
Hanford Works Reports
55
NACA Technical Reports
54
HW (Series)
53
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50
Oak Ridge National Laboratory Reports
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1,501 Matching Results
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Electromagnetic Flowmeter
The following report documents progress the development of an electromagnetic flowmeter that measures the flow of half alloy, covering the period for March 1 to November 30, 1947.
Date:
1952
Creator:
Barnes, A. H.; Whitham, G. K. & Smith, F. A.
Object Type:
Report
System:
The UNT Digital Library
Electromagnetic Research Division Quarterly Progress Report, Part I for Period Ending March 31, 1952
From abstract: "Relocation of the ion source in the 86-inch cyclotron has increased the available beam energy substantially. Modifications have also been made to permit the use of targets of 100 square inches. Proton currents of one milliampere can now be obtained readily at ~24 Mev. The 63-inch cyclotron has been completely assembled and checked. In rf tests a 75 kv dee-to-dee voltage has been maintained, under vacuum, for long periods without evidences of failures, thus exceeding the 60 kv design specification. In an investigation of proton beam distribution on the 22-inch cyclotron it has been shown that almost all of the loss of protons form the beam occurs within one-half of the maximum radius. The ration of H3+ to H1+ ions in the beam increases at lower at lower arc intensities in the ion source. Accelerated corrosion was found in an Inconel tube containing #14 eutectic (ARE) after a six-hour bombardment with 20 Mev protons at 4,500 watts/cc. Installation of facilities for the preparation of plutonium isotopes is nearing completion; preliminary tests are being made."
Date:
1952
Creator:
Livingston, Robert S.
Object Type:
Report
System:
The UNT Digital Library
Equal-Strength Design of Tension-Field Webs and Uprights
Note presenting a method for proportioning thin-web beams to attain equal strength of web and uprights which may in turn be employed toward optimum design of these components. Improved empirical formulas for this purpose are developed the results checked by experimental loading of six beams.
Date:
January 1952
Creator:
Upson, Ralph H.; Phelps, George M. & Liu, Tung-Sheng
Object Type:
Report
System:
The UNT Digital Library
Equilibria and Reaction Rates in the Disproportionation of Pu(IV)
Abstract: "The equilibrium quotients and the specific rate constants for the disproportionation of Pu(IV) have been measured as a function of hydrogen and plutonium ion concentrations in perchloric acid solutions of unit ionic strength at 25.00 +/- 0.02. Instead of obtaining the plutonium ion concentrations spectrophotometrically as has been done by previous workers, measurements of the mean oxidation number of the solutions were combined with electromotive force measurements of the Pu(III)-Pu(IV) 'couple and the total plutonium ion concentrations. From these data it is possible to calculate the concentrations of Pu(III), Pu(IV) and Pu(VI) present in the solutions at any time. The equilibrium quotient for the disproportionation reaction has been found to be directly dependent upon the fourth power of the hydrogen ion concentration, thus supporting the existence of the plutonyl ion, PuO2++, in these solutions. A weighted mean value of 0.0089 was found for the Pu(IV) disproportionation equilibrium quotient in perchloric acid solutions of unit ionic strength at 25. The rate of the forward (disproportionation) reaction has been found to exhibit an inverse third power hydrogen ion concentration dependence and the most probable rate determining step of this reaction is PuOH++++ + Pu(OH)2++ --> Pu+++ + PuO2+ + H2O + …
Date:
1952
Creator:
Rabideau, Sherman W.
Object Type:
Report
System:
The UNT Digital Library
Estimate of Known Recoverable Reserves of Coking Coal in Jefferson County, Pennsylvania
Report of investigations issued by the U.S. Bureau of Mines evaluating the known reserves of coking coal in Jefferson County, Pennsylvania. The properties of coal and coal blends from the area are analyzed. This report includes tables, and maps.
Date:
January 1952
Creator:
Dowd, James J.; Toenges, Albert L.; Abernethy, R. F. & Reynolds, D. A.
Object Type:
Report
System:
The UNT Digital Library
Estimate of Slip Effect on Compressible Laminar-Boundary-Layer Skin Friction
Note presenting a consideration of Rayleigh's problem for a compressible viscous gas, subject to slip at the wall. Expressions for slip velocity and skin friction are derived with the gas temperature at the wall and the product of viscosity times density assumed constant, or nearly so. The results of the solution are interpreted to define the border region between continuum and slip flow and to estimate the effect of slip.
Date:
January 1952
Creator:
Mirels, Harold
Object Type:
Report
System:
The UNT Digital Library
Estimates of Minimum Critical Volumes
Introduction: "A study has been made of the available high assay criticality data for materials of 93.4% and 95.3% U-235, 1, 2, 3 and minimum critical volumes have been estimated for several conditions."
Date:
1952
Creator:
Rohr, R. C. & Henry, Hugh F.
Object Type:
Report
System:
The UNT Digital Library
Examination of the Uranus Claim, near Summit Diggings, Kern County, California
Discussing and investigation with the purpose of examining a uranium prospect which was reported to be in active development
Date:
January 1952
Creator:
Anderson, T. P. & Waddell, G. G.
Object Type:
Report
System:
The UNT Digital Library
Experimental Aerodynamic Derivatives of a Sinusoidally Oscillating Airfoil in Two-Dimensional Flow
"Experimental measurements of the aerodynamic reactions on a symmetrical airfoil oscillating harmonically in a two-dimensional flow are presented and analyzed. Harmonic motions include pure pitch and pure translation, for several amplitudes and superimposed on an initial angle of attack, as well as combined pitch and translation. The apparatus and testing program are described briefly and the necessary theoretical background is presented" (p. 1).
Date:
1952
Creator:
Halfman, Robert L.
Object Type:
Report
System:
The UNT Digital Library
Experimental Determination of the Effect of Horizontal-Tail Size, Tail Length, and Vertical Location on Low-Speed Static Longitudinal Stability and Damping Pitch of a Model Having 45 Degree Sweptback Wing and Tail Surfaces
Report presents the results of an investigation conducted in the Langley stability tunnel to determine the effects of horizontal tails of various sizes and at various tail lengths (when loaded on the fuselage center line) and also the effects of vertical location of the horizontal tail relative to the wing on the low-speed static longitudinal stability and on the steady-state rotary damping in pitch for a complete-model configuration. The wing and tail surfaces had the quarter-chord lines swept back 45 degrees and had aspect ratios of 4.
Date:
1952
Creator:
Lichtenstein, Jacob H.
Object Type:
Report
System:
The UNT Digital Library
Experimental Determination of Time Constants and Nusselt Numbers for Bare-Wire Thermocouples in High-Velocity Air Streams and Analytic Approximation of Conduction and Radiation Errors
Report presenting the results of experiments conducted to determine time constants of several bare-wire thermocouples mounted in cross flow to an air stream. Four pairs of common thermocouple materials with three different wire diameters were used. Results regarding the time constants, Nusselt numbers, effective gas temperature, and some numerical calculations are provided.
Date:
January 1952
Creator:
Scadron, Marvin D. & Warshawsky, Isidore
Object Type:
Report
System:
The UNT Digital Library
An Experimental Investigation of Transonic Flow Past Two-Dimensional Wedge and Circular-Arc Sections Using a Mach-Zehnder Interferometer
Report presents the results of interferometer measurements of the flow field near two-dimensional wedge and circular-arc sections of zero angle of attack at high-subsonic and low-supersonic velocities. Both subsonic flow with local supersonic zone and supersonic flow with detached shock wave have been investigated. Pressure distributions and drag coefficients as a function of Mach number have been obtained.
Date:
1952
Creator:
Bryson, Arthur Earl, Jr.
Object Type:
Report
System:
The UNT Digital Library
An Experimental Study of the Performance of a Cavity Type Ionization Chamber
Abstract: "Comparisons between calorimetric and ionization chamber measurements of the power generated in graphite by absorption of energetic gamma rays have been carried out. The results serve as a calibration of the chamber. They also serve to test the consistency between the theoretical performance of this type of chamber and previously determined values for the factors which relate ionization in the chamber to energy absorption in the walls."
Date:
1952
Creator:
Jenks, G. H.
Object Type:
Report
System:
The UNT Digital Library
Fabrication and Properties of Extruded Silver-Cadmium Control Rods
The production of cross-type control rods having a span of 4-7/8 in., and an arm thickness of 1/8 in., was studied. Extrusion techniques were developed for producing cross-type control rods from each of two alloys; one containing 75% silver-25% cadmium, and the other containing 67% silver-30% cadmium-3% copper. Fabrication of the extruded crosses into clad control rods for the Mark I naval reactor was attempted. A set of unclad control rods for the Zero Power Reactor was produced. The effect of copper, nickel, aluminum, palladium, and indium, singly and in various combinations, on the physical and mechanical properties of silver cadmium was studied. Data are given on the work hardening and annealing of binary silver-cadmium alloys, and on the precipitation hardening of certain complex silver cadmium alloys. A materials specification and suggested fabrication procedure were established for nickel-clad extruded silver-cadmium control rods.
Date:
January 1952
Creator:
Dwight, Austin E. (Austin Elbert), 1919-
Object Type:
Report
System:
The UNT Digital Library
Figures 2, 3, 5, and 6: Barrier Pillars in Lackawanna Basin, Northern Field: Anthracite Region of Pennsylvania
Maps showing the effects of barrier pillars on water flow in relation to mines in Lackawanna Basin, northern field of the Anthracite Region of Pennsylvania. Scale 1:4,500 feet.
Date:
1952
Creator:
United States. Bureau of Mines.
Object Type:
Map
System:
The UNT Digital Library
Fission Asymmetry as a Function of Excitation Energy of the Compound Nucleus
This report follows a preliminary investigation of asymmetry of frequent mass distribution from proton induced fission that has been made as a function of energy in the range 11-18 mev.
Date:
1952
Creator:
Fowler, J. L.; Jones, W. H. & Paehler, J. H.
Object Type:
Report
System:
The UNT Digital Library
Flight investigation of a mechanical feel device in an irreversible elevator control system of a large airplane
Report presents the results of measurements of the longitudinal stability and control characteristics of a large airplane using a mechanical feel device in combination with a booster incorporated in the elevator-control system. Tests were made to investigate the feasibility of eliminating the aerodynamic control forces through use of a booster and of providing control-feel forces mechanically. The feel device consisted of a centering spring which restrained the control stick through a linkage which was changed as a function of the dynamic pressure. Provisions were made for trimming and for manual adjustment of the force gradient. The system was designed to approximate the control-force characteristics that would result with a conventional elevator control with linear hinge-moment characteristics.
Date:
1952
Creator:
Brown, B. Porter; Chilton, Robert G. & Whitten, James B.
Object Type:
Report
System:
The UNT Digital Library
Free-Spinning-Tunnel Investigation of a 1/24-Scale Model of the Grumman F9F-6 Airplane: TED No. NACA DE 364
From Summary: "An investigation of a 1/24-scale model of the Grumman F9F-6 airplane has been conducted in the Langley 20-foot free-spinning tunnel. The erect and inverted spin and recovery characteristics of the model were determined for the normal flight loading with the model in the clean condition. The effect of loading variations was investigated briefly. Spin-recovery parachute tests were also performed."
Date:
1952
Creator:
Klinar, Walter J. & Healy, Frederick M.
Object Type:
Report
System:
The UNT Digital Library
Fundamental effects of cold-work on some cobalt-chromium-nickel-iron base creep-resistant alloys
Report presenting an investigation of the influence of cold-working on the creep properties of an alloy containing 20 percent cobalt, 20 percent chromium, 20 percent nickel, and balance iron and on the same alloy modified by small additions of tungsten alone or tungsten, molybdenum, and columbium in combination. The effects of cold-working were the same on all alloys studied. Results regarding the amount of cold reduction for maximum creep resistance, diffraction lines, stress relaxation properties, and properties of similarity across all alloys are provided.
Date:
January 1952
Creator:
Frey, D. N.; Freeman, J. W. & White, A. E.
Object Type:
Report
System:
The UNT Digital Library
General Consideration of Problems in Compressible Flow Using the Hodograph Method
Report presenting an investigation of the hodograph method as it is applied in general to the problem of compressible flow.
Date:
January 1952
Creator:
Chang, Chieh-Chien
Object Type:
Report
System:
The UNT Digital Library
A General Theory of Three-Dimensional Flow in Subsonic and Supersonic Turbomachines of Axial-, Radial-, and Mixed-Flow Types
Note presenting a general theory of steady three-dimensional flow of a nonviscous fluid in subsonic and supersonic turbomachines with arbitrary hub and casing shapes and a finite number of blades. The equations obtained to describe the fluid flow on these stream surfaces show clearly the several approximations involved in ordinary two-dimensional treatments.
Date:
January 1952
Creator:
Wu, Chung-Hua
Object Type:
Report
System:
The UNT Digital Library
Geological Survey's Work on Isotope Geology of Uranium, Thorium, and Their Decay Products
Report discussing a research program on the isotope geology of the uranium and thorium series. From Abstract: "Work is in progress on uranium-lead relationships in uranium ores of the Colorado Plateau region; on uranium-thorium-lead relationships in granite; on geologic variations in the isotopic composition of lead; and on radon and helium in natural gas."
Date:
January 1952
Creator:
Cannon, R. S. Jr.
Object Type:
Report
System:
The UNT Digital Library
The Geological Survey's Work on the Geology of Uranium and Thorium Deposits
From abstract: The Geological Survey has been studying the geology of uranium and thorium continuously since 1939, when it began a comprehensive investigation of the vanadium-uranium deposits of the Colorado Plateau. Greatly increased demand for uranium arising from the advent of controlled fission in 1942 resulted in widening of the study in 1944 to include other possible sources and in further expansion on behalf of the U. S. Atomic Energy Commission since 1947. The wide variety of materials investigated in this study are embraced by five somewhat arbitrary groups of related types of deposits as follows: (1) Igneous rocks, pegmatites, veins, and related deposits; (2) Deposits in sandstone of carnotite, copper-uranium, and other minerals; (3) Other consolidated sedimentary rocks; (4) Placers; and (5) Natural fluids.
Date:
1952
Creator:
Butler, Arthur P., Jr.
Object Type:
Report
System:
The UNT Digital Library
The Half-Life of Am²⁴²m for Negative Beta-Particle Emission
This report analyzes the americium-242m isotope and redetermines its half-life to yield a value of 16.01 +/- 0.02 hours, measuring its decay.
Date:
1952
Creator:
Kennan, Thomas K.; Penneman, R. A. & McInteer, B. B.
Object Type:
Report
System:
The UNT Digital Library