Resource Type
Collection
Technical Report Archive and Image Library
69
National Advisory Committee for Aeronautics Collection
48
Office of Scientific & Technical Information Technical Reports
26
TRAIL Microcard Collection
10
Texas Attorney General Opinions
6
Government Documents A to Z Digitization Project
2
Environmental Policy Collection
1
Texas State Publications
1
Serial/Series Title
NACA Research Memorandums
27
Atomic Energy Commission Reports
10
NACA Technical Notes
8
NACA Technical Memorandums
7
NACA Technical Reports
6
United States Bureau of Mines Reports
5
Hanford Works Reports
4
Report of investigations (United States. Bureau of Mines)
4
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3
Agriculture information series
2
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104 Matching Results
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8 steps in grading soybeans : under revised standards, effective September 1, 1949.
An explanation of the process used by U.S. federal grain inspectors to grade soybeans. Factors include odor, weevil or garlic infestation, moisture, weight per bushel, foreign material, mixed colors, splits, and damage.
Date:
June 1949
Creator:
United States. Extension Service.
Object Type:
Book
System:
The UNT Digital Library
The aerodynamic characteristics throughout the subsonic speed range of a thin, sharp-edged horizontal tail of aspect ratio 4 equipped with a constant-chord elevator
From Introduction: "Recent investigations have indicated several wing plan forms, wing sections, and wing-body-tail combinations suitable for flight at supersonic speeds. One such lifting surface, a thin, sharp-edged without sweep of aspect ratio 4 and taper ratio 0.5, has been the subject of an investigation in the Ames 12-foot pressure wind tunnel. The aim of the investigation was to determine the aerodynamic characteristics of such a wing plan form throughout the range of subsonic Mach numbers up to 0.94."
Date:
June 30, 1949
Creator:
Bandettini, Angelo & Reed, Verlin D.
Object Type:
Report
System:
The UNT Digital Library
Aerodynamic Properties of Cruciform-Wing and Body Combinations at Subsonic, Transonic, and Supersonic Speeds
From Introduction: "Although the aerodynamic characteristics of the components of such configurations may be well known, the mutual interference resulting from combining the wings, as well as the wings and body, may be so great that is desirable to study the aerodynamic properties of the complete configurations. Two methods of handling this problem are presented in this report. The first method is essentially an extension of the theory for slender wing-body combinations of reference 1 to determine the load distribution, forces, and moments exerted on slender cruciform-wing and body combinations inclined simultaneously at small angles in pitch and yaw. "
Date:
June 1949
Creator:
Spreiter, John R.
Object Type:
Report
System:
The UNT Digital Library
Airfoil Measurements in the DVL High-Speed Wind Tunnel (2.7-Meter Diameter)
Report is a brief summary of investigations on symmetrical and cambered airfoils in the DVL high-speed tunnel. Some information on the effects of low aspect ratio are also included.
Date:
June 1949
Creator:
Göthert, B.
Object Type:
Report
System:
The UNT Digital Library
Altitude-Test-Chamber Investigation of McDonnell Afterburner on J34 Engine
"An altitude-test-chamber investigation was conducted to determine the operational and performance characteristics of a McDonnell afterburner with a fixed-area exhaust nozzle on a J34 engine. At rated engine speed, the altitude limit, as determined by combustion blow-out, occurred as a band of unstable operation of about 6000-foot altitude in width with minimum altitude limits from 31,000 feet at a simulated flight Mach number of 0.40 to about 45,500 feet at a simulated flight Mach number of 1.00. Considerable difficulty was experienced in attempting to establish or maintain balanced-cycle engine operation at altitudes above 36,000 feet" (p. 1).
Date:
June 2, 1949
Creator:
Reller, John O. & Dowman, Harry W.
Object Type:
Report
System:
The UNT Digital Library
Analyses of Decay Curves of Irradiated Plastics
The following report covers the results of a general program that was conducted at the Oak Ridge National Laboratory to investigate the effects on plastic materials of exposure to radiation in the pile. In the investigation, several plastics were irradiated, and on removal from the pile, their rates of decay were determined by measurement of gamma activity in an ionization chamber.
Date:
June 22, 1949
Creator:
Saleeby, R. N.; Cheshire, J. R. & Jensen, W. P.
Object Type:
Report
System:
The UNT Digital Library
An Analysis of the Transition of a Helicopter From Hovering to Steady Autorotative Vertical Descent
"This report is the second phase of a broad program of study of the transient motions of helicopters in autorotative flight. The first phase (reference 1) dealt with the steady-state condition of autorotative vertical descent. This report is concerned with the the transition from the steady condition of hovering to the steady autorotative descent" (p. 1).
Date:
June 1949
Creator:
Nikolsky, A. A. & Seckel, Edward
Object Type:
Report
System:
The UNT Digital Library
An Analytical Study of the Steady Vertical Descent in Autorotation of Single-Rotor Helicopters
"This report is the result of the first part of a broad program to analyze the transient motions of a helicopter, which occur in the various phases of flight following power failure" (p. 1).
Date:
June 1949
Creator:
Nikolsky, A. A. & Seckel, Edward
Object Type:
Report
System:
The UNT Digital Library
Atomic Displacements Produced by Fission Fragments and Fission Neutrons in Matter
About four-fifths of the energy of the fission process is shared by the two heavy fragments into which the nucleus splits. This energy, of about 80 Mev. per fragment, is transferred to the medium in which the fission takes place in two ways. First, because each fragment is stripped of about half of its electrons during most of its path, it will interact strongly with electrons and thus lose energy through ionizing collisions with other atoms. Secondly, the fragments will lose energy by elastic collisions with atoms as a whole. Each fragment leaves in its wake a cloud of moving electrons and atoms. This cloud will roughly resemble a cylinder whose radius will increase with time on account of the motion of the struck electrons and atoms. They may now investigate two features of the slowing down process. First as it affects the fragment, i.e. we calculate its range, straggling, etc. And secondly they may work out the motion of the cylinder of moving particles, its effect on the medium, etc.
Date:
June 29, 1949
Creator:
Ozeroff, J.
Object Type:
Report
System:
The UNT Digital Library
Bare Beryllium Extrusion Using Graphite Introductory Cones
The following document describes the process of rare beryllium extrusion using graphite introductory cones with the purpose of finding a lubricant which would decrease excessive friction between the billet and prose parts.
Date:
June 28, 1949
Creator:
Arnold, Samuel V.
Object Type:
Report
System:
The UNT Digital Library
Boundary-layer and stalling characteristics of the NACA 63-009 airfoil section
Report presenting a wind-tunnel investigation to determine the boundary-layer and stalling characteristics of the NACA 63-009 airfoil section. Pressure distributions, tuft studies, and boundary-layer measurements were obtained. A localized region of flow separation was found to develop on the upper surface of the airfoil near the leading edge.
Date:
June 1949
Creator:
Gault, Donald E.
Object Type:
Report
System:
The UNT Digital Library
Carbon deposition from AN-F-58 fuels in a J33 single combustor
Report presenting an investigation using a single combustor from a 4600-pound-thrust turbojet engine to determine the amount of carbon deposition of AN-F-58 fuels and the effect of carbon formations in the combustor on the altitude operational limits. Three fuel blends conforming to AN-F-58 specification were prepared in order to determine the influence of boiling temperature and of aromatic content on carbon deposition. Results regarding carbon deposition and effect of carbon formations on altitude operational limits are provided.
Date:
June 24, 1949
Creator:
Wear, Jerrold D. & Douglass, Howard W.
Object Type:
Report
System:
The UNT Digital Library
Comparison of performance of AN-F-58 and AN-F-32 fuels in J33-A-23 turbojet engine
Report presenting an investigation using a 4600 pound-thrust turbojet engine as part of a program to determine the comparative performance of fuels conforming to specifications AN-F-58 and AN-F-32. Results regarding the altitude performance, altitude low-speed blow-out limits, idling limits of fuel-metering control, altitude windmilling starts, carbon-deposition rates, and iron oxide contamination are provided.
Date:
June 2, 1949
Creator:
Wilsted, H. D. & Armstrong, J. C.
Object Type:
Report
System:
The UNT Digital Library
Computation of Thin-Walled Prismatic Shells
"We consider a prismatic shell consisting of a finite number of narrow rectangular plates and having in the cross-section a finite number of closed contours (fig. 1(a)). We shall assume that the rectangular plates composing the shell are rigidly joined so that there is no motion of any kind of one plate relative to the others meeting at a given connecting line. The position of a point on the middle prismatic surface is considered to be defined by the coordinate z, the distance to a certain initial cross-section z = O, end the coordinate s determining its position on the contour of the cross-section" (p. 1).
Date:
June 1949
Creator:
Vlasov, V. Z.
Object Type:
Report
System:
The UNT Digital Library
Contribution to the Problem of Flow at High Speed
Report divided into two sections about flow problems encountered at high speeds. The topics include: 1) A Few General Remarks Covering the Prandtl-Busemann Method; and 2) Effect of Compressibility in Axially Symmetrical Flow around an Ellipsoid.
Date:
June 1949
Creator:
Schmieden, C. & Kawalki, K. H.
Object Type:
Report
System:
The UNT Digital Library
Correlation of Physical Properties With Molecular Structure for Some Dicyclic Hydrocarbons Having High Thermal-Energy Release Per Unit Volume
"As part of a program to study the correlation between molecular structure and physical properties of high-density hydrocarbons, the net heats of combustion, melting points, boiling points, densities, and kinematic viscosities of some hydrocarbons in the 2-n-alkylbiphenyl, 1,1-diphenylalkane, diphenylalkane, 1,1-dicyclohexylalkane, and dicyclohexylalkane series are presented" (p. 55).
Date:
June 20, 1949
Creator:
Wise, P. H.; Serijan, K. T. & Goodman, I. A.
Object Type:
Report
System:
The UNT Digital Library
Correlation of Soil Properties with Geologic Information: Report Number 1, Simplification of the Liquid Limit Test Procedure
Introduction: The general project of correlating soil properties with geologic information, one phase of which is described in this report, consists in comparing soil properties with soil types and with their geologic history and environment in order to determine what correlations are possible.
Date:
June 1949
Creator:
Waterways Experiment Station (U.S.)
Object Type:
Report
System:
The UNT Digital Library
The Coulometric Titration of 8-Hydroxyquinoline
Abstract: "A new method of determining 8-hydroxyquinoline by titration with electrolytucally-generated bromine has been developed. Results show good precision in the range 0.4 mg. to 1.6 mg. total 8-hydroxyquinoline, with 99% confidence limits of less than +/- 2%. An electronically-regulated constant current source, required by the method, is described. A new indicator system with high sensitivity to free bromine is discussed."
Date:
June 16, 1949
Creator:
Carson, W. N.
Object Type:
Report
System:
The UNT Digital Library
A design for a removable floor-drain grill and trap for use in radioactive risk areas
A design is proposed for a removable drainage grill and trap for floor drains in radioactive risk areas. One simple element provides free liquid run off, an air and fume barrier, and ready access for cleaning or replacement in event of contamination. Application may be made to existing and future untrapped drains.
Date:
June 15, 1949
Creator:
Olt, R.G.
Object Type:
Report
System:
The UNT Digital Library
Determination of Centrifugal-Compressor Performance on Basis of Static-Pressure Measurements in Vaneless Diffuser
Note presenting an investigation of the use of measured static pressures in a vaneless-diffuser passage for determining centrifugal-compressor performance. The general effects of diffuser-wall-surface friction were studied to locate the regions in the vaneless-diffuser passage where the most valid evaluation can be made by the static-pressure method.
Date:
June 1949
Creator:
Ginsburg, Ambrose; Johnsen, Irving A. & Redlitz, Alfred C.
Object Type:
Report
System:
The UNT Digital Library
Determination of Organic Acids in Process Solutions
Abstract: "A method has been established for the estimation of volatile organic acids in aqueous process solutions containing UNH, nitric acid, ANN, sodium dichromate and small amounts of hexone. The practice is to distill a 400 ul or 500 ul sample in the presence of an excess of phosphoric acid and ferrous sulfate under a high vacuum; a special apparatus utilizing a receiver cooled with a dry ice-isopropanol mixture is employed. The distillate is taken up in isopropanol and then titrated potentiometrically with standard potassium hydroxide solution. Since nitric acid and organic acids are present, two end points are observed. The potassium hydroxide added between these end points is equivalent to the organic acids. In the titration, CO2 from the atmosphere or in the potassium hydroxide is a source of error. The former was avoided and correction was made for the latter."
Date:
June 29, 1949
Creator:
Brouns, R. J. & Pollock, C. W.
Object Type:
Report
System:
The UNT Digital Library
Diamond Drilling in the Metaline District, Pend Oreille County, Washington
Report issued by the Bureau of Mines on exploration by diamond drilling in Pend Oreille County. Results of the exploration are presented. This report includes tables, maps, illustrations, and photographs.
Date:
June 1949
Creator:
Wimmler, Norman L. & Cole, W. B.
Object Type:
Report
System:
The UNT Digital Library
A Direct Quantitative Fluorimetric Method for the Determination of Small Amounts of Uranium in the Field and Laboratory
From abstract: "This paper describes a quantitative fluorimetric method for the determination of small amounts of uranium..., useful for field and laboratory."
Date:
June 1949
Creator:
Grimaldi, Frank; Ward, F. N. & Kreher, Ruth
Object Type:
Report
System:
The UNT Digital Library
Effect of Air Cooling of Turbine Disk on Power and Efficiency of Turbine from Turbo Engineering Corporation TT13-18 Turbosupercharger
"An investigation was conducted to determine the effect of turbine-disk cooling with air on the efficiency and the power output of the radial-flow turbine from the Turbo Engineering Corporation TT13-18 turbosupercharger. The turbine was operated at a constant range of ratios of turbine-inlet total pressure to turbine-outlet static pressure of 1,5 and 2.0, turbine-inlet total pressure of 30 inches mercury absolute, turbine-inlet total temperature of 12000 to 20000 R, and rotor speeds of 6000 to 22,000 rpm, Over the normal operating range of the turbine, varying the corrected cooling-air weight flow from approximately 0,30 to 0.75 pound per second produced no measurable effect on the corrected turbine shaft horsepower or the turbine shaft adiabatic efficiency" (p. 1).
Date:
June 9, 1949
Creator:
Berkey, William E.
Object Type:
Report
System:
The UNT Digital Library