Access
Resource Type
Partner
Collection
Congressional Research Service Reports
140
Office of Scientific & Technical Information Technical Reports
124
Government Accountability Office Reports
34
Technical Report Archive and Image Library
27
National Advisory Committee for Aeronautics Collection
16
TRAIL Microcard Collection
8
Texas State Publications
2
D. Jack Davis Art Education Collection
1
Harris and Eliza Kempner
1
Country
Decade
Month
Day
Language
329 Matching Results
Results open in a new window/tab.
Results:
1 - 24 of
329
next
On the Use of Residue Theory for Treating the Subsonic Flow of a Compressible Fluid
"A new mathematical technique, due to Milne-Thomson, is used to obtain an improved form of the method of Poggi for calculating the effect of compressibility on the subsonic flow past an obstacle. By means of this new method, the difficult surface integrals of the original Poggi method can be replaced by line integrals. These line integrals are then solved by the use of residue theory. In this way an equation is obtained giving the second-order effect of compressibility on the velocity of the fluid" (p. 39).
Date:
September 8, 1941
Creator:
Kaplan, Carl
System:
The UNT Digital Library
The Solubility of Uranyl Oxalate and the Existence of Undissociated Uranyl Oxalate in Solution
Abstract: "The solubility of the solid, UO2C2O4 x rH2O, was measured at various acid and uranyl nitrate concentrations. The results of the measurements prove the existence of the uranyl oxalate complex - UO2C2O4, in solutions containing excess UO2^2."
Date:
September 8, 1945
Creator:
Pimentel, George C. & Stevenson, F. R.
System:
The UNT Digital Library
The Feasibility of Nuclear-Powered Rockets
None
Date:
September 8, 1948
Creator:
Redding, E. M.
System:
The UNT Digital Library
Investigation at large scale of the pressure distribution and flow phenomena over a wing with the leading edge swept back 47.5 degrees having circular-arc airfoil sections and equipped with drooped-nose and plain flaps
Report presenting an investigation of the pressure distribution over a wing with the leading-edge swept back 47.5 degrees and with symmetrical circular-arc airfoil sections in the full-scale tunnel at a designated Mach and Reynolds number. The investigation included measurements of the surface static pressures along the chord for six spanwise stations, for a large angle-of-attack range, and for several angles of yaw.
Date:
September 8, 1949
Creator:
Lange, Roy H.; Whittle, Edward F., Jr. & Fink, Marvin P.
System:
The UNT Digital Library
Progress Report on Carnotite Studies; Carbonate Processes : August 1949
This is a progress report compiled by the chemical development department of the Carbide and Carbon Chemicals Corporation's Y-12 plant, discussing work on the carbonate (Monticello) process, as well as the recovery of uranium and vanadium from carbonate liquors.
Date:
September 8, 1949
Creator:
Brown, K. B.; Coleman, C. F. & Grimes, W. R.
System:
The UNT Digital Library
Smooth-Water Landing Stability and Rough-Water Landing and Take-Off Behavior of a 1/13-Scale Model of the Consolidated Vultee Skate 7 Seaplane, TED No. NACA DE 338
A model of the Consolidated Vultee Aircraft Corporation Skate 7 seaplane was tested in Langley tank no. 2. Presented without discussion in this paper are landing stability in smooth water, maximum normal accelerations occurring during rough-water landings, and take-off behavior in waves.
Date:
September 8, 1949
Creator:
McKann, Robert F.; Coffee, Claude W. & Arabian, Donald D.
System:
The UNT Digital Library
Equations and Charts for the Rapid Estimation of Hinge-Moment and Effectiveness Parameters for Trailing-Edge Controls Having Leading and Trailing Edges Swept Ahead of the Mach Lines
"Existing conical-flow solutions have been used to calculate the hinge-moments and effectiveness parameters of trailing-edge controls having leading and trailing edges swept ahead of the Mach lines and having streamwise root and tip chords. Equations and detailed charts are presented for the rapid estimation of these parameters. Also included is an approximate method by which these parameters may be corrected for airfoil-section thickness" (p. 937).
Date:
September 8, 1950
Creator:
Goin, Kennith L.
System:
The UNT Digital Library
Free-Spinning Tunnel Tests of a 1/20-Scale Model of the McDonnell XF3H-1 Airplane : TED No. NACA DE 343
Memorandum presenting an investigation conducted in the 20-foot free-spinning tunnel with a scale model to determine the spin and recovery characteristics of the McDonnell XF3H-1 airplane. The effects of control settings and movements on the erect and inverted spin and recovery characteristics of the model were determined. Results regarding design gross weight loading, variation of loading, spin-recovery parachutes, pilot escape, landing condition, control forces, and recommended recovery technique are provided.
Date:
September 8, 1950
Creator:
Berman, Theodore
System:
The UNT Digital Library
Low-Speed Investigation of a 0.16-Scale Model of the X-3 Airplane: Longitudinal Characteristics
Report presenting a wind-tunnel investigation of the low-speed static longitudinal characteristics of a model of the X-3 airplane with the wing flaps neutral and deflected. Results regarding those characteristics with the flaps neutral, with the flaps fully deflected, in the presence of a ground plane, with the flaps partially deflected, and effect of miscellaneous changes of the model are provided.
Date:
September 8, 1950
Creator:
Delany, Noel K. & Hayter, Nora-Lee F.
System:
The UNT Digital Library
An analytical method for evaluating factors affecting application of transpiration cooling to gas turbine blades
From Introduction: "A survey of some of the advantages and problems associated with transpiration cooling of gas-turbine engines is given in reference 1, and its is shown therein that high pressure gradients around the periphery of gas-turbine blades require that the blade wall permeability be varied around the blade periphery in order for uniform cooling to be obtained over the entire blade surface. This fact is verified in experimental investigations of transpiration-cooled turbine blades mounted in a static cascade (references 2 and 3) where it is shown that although transpiration cooling results in extremely effective cooling in the midchord region of the blade, there are very large variations in the chordwise temperature distribution because of improper permeability variation."
Date:
September 8, 1952
Creator:
Esgar, Jack B.
System:
The UNT Digital Library
Dependence of Positive Pion Production Cross Sections on Atomic Number at Low Energies
A preliminary study of positive pion production from proton-nucleus collisions revealed that positive pion production cross sections agree more favorably with a Z 2/3 variation than with a variation proportional to the atomic number. A similar study on negative pion production has shown that negative pion yields from proton-nucleus collisions tend to vary in proportion to the number of neutrons in the nucleus. As a result an experiment was performed to investigate if there is a significant change in positive pion production with changing atomic number at two lower pion energies.
Date:
September 8, 1953
Creator:
Sagane, Ryokichi, 1905-1969 & Dudziak, Walter F.
System:
The UNT Digital Library
Flight Determination of Drag of Normal-Shock Nose Inlets With Various Cowling Profiles at Mach Numbers From 0.9 to 1.5
External-drag data are presented for normal-shock nose inlets with NACA 1-series, parabolic, and conic cowling profiles. The tests were made at an angle of attack of 0 degrees by using rocket-propelled models in free flight at Mach numbers from 0.9 to 1.5. The Reynolds number based on body maximum diameter varied from 2.5 x 10 sup 6 to 5.5 x 10 sup 6.
Date:
September 8, 1953
Creator:
Sears, R. I.; Merlet, C. F. & Putland, L. W.
System:
The UNT Digital Library
Fused Salt Mixtures as Potential Liquid Fuels for Nuclear Power Reactors
From introduction: "This report summarizes the work done on a study of fused-salt systems in a search for new liquid fuels suitable for use in a nuclear power reactor."
Date:
September 8, 1953
Creator:
Crooks, R. C.; Snyder, M. J. & Clegg, J. W.
System:
The UNT Digital Library
Experimental Investigation of a Five-Stage Axial-Flow Research Compressor with Transonic Rotors in All Stages 1: Compressor Design
Memorandum presenting a five-stage axial-flow compressor with all rotor rows operating with transonic relative inlet Mach numbers designed as a research unit to study the potentialities and problems arising from the compounding of transonic stages. The report presents all design values and procedures, blade-row velocity diagrams, and the selection of blade shapes.
Date:
September 8, 1954
Creator:
Sandercock, Donald M.; Kovach, Karl & Lieblein, Seymour
System:
The UNT Digital Library
Experimental Investigation of a Five-Stage Axial-Flow Research Compressor With Transonic Rotors in All Stages 2: Compressor Over-All Performance
Memorandum presenting an evaluation of the overall performance of a 20-inch-diameter five-stage compressor as the initial step in an investigation of the potential performance and problems associated with a high-stage-pressure ratio compressor. The overall performance was evaluated over a range of flows at equivalent tip speeds from 40 to 100 percent of design. Results regarding the overall performance, compressor-inlet conditions, compressor-discharge conditions, stagewise variation of static pressure, and performance evaluation are provided.
Date:
September 8, 1954
Creator:
Kovach, Karl & Sandercock, Donald M.
System:
The UNT Digital Library
Pumping Characteristics for Several Simulated Variable-Geometry Ejectors With Hot and Cold Primary Flow
Report presenting an investigation of the pumping characteristics of eight conical ejectors mounted on a fuselage portion of a supersonic airplane. The diameter ratio, spacing ratio, nozzle pressure, and ejector weight flows were varied. Results regarding the ejector pumping characteristics, comparison with previous results, comparison of data for cold and hot primary flow, and ejector air-supply requirements are provided.
Date:
September 8, 1954
Creator:
Allen, John L.
System:
The UNT Digital Library
Pumping Characteristics for Several Simulated Variablegeometry Ejectors With Hot and Cold Primary Flow
Report presenting an investigation of the pumping characteristics of eight conical ejectors mounted on a scale fuselage portion of a supersonic airplane. The configurations simulated various positions of a two-position nozzle with a fixed shroud and double-iris exit. Results regarding ejector pumping characteristics, comparison with previous results, comparison of data for cold and hot primary flow, and ejector air-supply requirements are provided.
Date:
September 8, 1954
Creator:
Allen, John L.
System:
The UNT Digital Library
Techniques for Handling and Processing Emulsion Stacks
The techniques for assembling, processing and handling large nuclear-emulsion stacks are discussed. Results of experiments varying the development procedure are presented.
Date:
September 8, 1954
Creator:
Birge, Robert W.; Kerth, Leroy T.; Richman, Chaim; Stork, DonaldH. & Whetstone, Stanley L.
System:
The UNT Digital Library
Correlation of Vibratory Root Failures and Stress Distribution in J65 Compressor Blades
Report presenting an investigation of the stress distribution in the roots of the first three stages of the J6S axial-flow compressor in order to explain root failures experienced in service. Root failures were producible in the lab when high vibratory stresses were combined with simulated centrifugal loads. Results regarding fatigue tests on the original J6S blade roots and on two redesigned blade roots as well as a comparison of the different root designs are provided.
Date:
September 8, 1955
Creator:
Meyer, André J., Jr. & Kaufman, Albert
System:
The UNT Digital Library
The Coulometric Titration of Plutonium
This work was performed to develop a general chemical method for the determination of small amounts of plutonium in solution. The work showed that a coulometric titration based on the preliminary oxidation of the plutonium to Pu (VI) followed by titration with electrolytically-generated ferrous ion to Pu (IV) was such a general method and was subject to few interferences. The significance of the work is that a chemical determination of plutonium can be made for amounts of plutonium heretofore determined only by radioassay methods, and the chemical determination of larger amounts are made more readily and with higher precision than with previous methods. The work also extends the application of coulometric titration methods to a new substance.
Date:
September 8, 1955
Creator:
Carson, Jr., W. N.; Gile, H. S. & Vanderwater, J. W.
System:
The UNT Digital Library
Interaction of a Jet and Flat Plate Located in an Airstream
Report presenting an evaluation of the interaction between a flat plate and a nearby jet issuing from a convergent nozzle over a range of pressure ratios and free-stream Mach numbers. The effect on the interaction of the presence of streamline, blunt-base, and curved-base fairings between the plate and parabolic afterbody housing the exit nozzle was also investigated.
Date:
September 8, 1955
Creator:
Englert, Gerald W.; Wasserbauer, Joseph F. & Whalen, Paul
System:
The UNT Digital Library
Investigation of the compressive strength and creep lifetime of 2024-T3 aluminum-alloy plates at elevated temperatures
The results of elevated-temperature compressive strength and creep tests of 2024-t3 (formerly 24s-t3) aluminum alloy plates supported in v-grooves are presented. The strength-test results indicate that a relation previously developed for predicting plate compressive strength for plates of all materials at room temperature is also satisfactory for determining elevated-temperature strength. Creep-lifetime results are presented for plates in the form of master creep-lifetime curves by using a time-temperature parameter that is convenient for summarizing tensile creep-rupture data. A comparison is made between tensile and compressive creep lifetime for the plates and a method that made use of isochronous stress-strain curves for predicting plate-creep failure stresses is investigated.
Date:
September 8, 1955
Creator:
Mathauser, Eldon E. & Deveikis, William D.
System:
The UNT Digital Library
Performance Characteristics of Several Divergent-Shroud Aircraft Ejectors
Report presenting an investigation of ten divergent- and two cylindrical-shroud ejectors to determine internal ejector performance over a range of pressure ratios and expansion area ratios for Mach numbers up to about 3. Results regarding jet-thrust and air-handling characteristics and net-thrust performance are provided.
Date:
September 8, 1955
Creator:
Greathouse, William K. & Beale, William T.
System:
The UNT Digital Library
[Sugarland State Bank, Cash Position, September 8, 1955]
Report of the daily cash position for Sugarland State Bank.
Date:
September 8, 1955
Creator:
Sugarland State Bank
System:
The Portal to Texas History