Resource Type
Collection
Technical Report Archive and Image Library
87
National Advisory Committee for Aeronautics Collection
67
Office of Scientific & Technical Information Technical Reports
56
Texas Attorney General Opinions
26
TRAIL Microcard Collection
5
Texas State Publications
4
Government Documents A to Z Digitization Project
3
USDA Farmers' Bulletins
1
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NACA Research Memorandums
38
NACA Technical Notes
27
Atomic Energy Commission Reports
15
AEC research and development report
9
Oak Ridge National Laboratory Reports
4
TID
4
NACA Technical Memorandums
2
Report (U.S. Atomic Energy Commission)
2
UC (Series)
2
Union Carbide Corporation Reports
2
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176 Matching Results
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Don't give fire a place to start!
Describes steps to take for spring cleaning to prevent fires and accidents in the home.
Date:
February 1958
Creator:
United States. Department of Agriculture.
Object Type:
Book
System:
The UNT Digital Library
Production of Turnips and Rutabagas.
Describes varieties of turnips and rutabagas and effective methods of production and marketing.
Date:
February 1958
Creator:
Beattie, W. R. (William Renwick), b. 1870
Object Type:
Book
System:
The UNT Digital Library
Tobacco diseases and their control.
Describes different types of diseases that threaten tobacco crops, and methods for their control.
Date:
February 1958
Creator:
Clayton, Edward E. & McMurtrey, J. E. (James Edward), 1893-
Object Type:
Book
System:
The UNT Digital Library
Roll Cladding Uranium-Zirconium and Uranium-Zirconium-Niobium Alloys with Zircaloy-2 for Plate-Type Fuel Elements
From Abstract: "Investigations were made of alternate methods of bonding fuel shapes and the use of alternate core alloys in flat plates. Alternations and additions were made to development facilities needed to fabricate roll-clad plates for the EBWR core. Pilot production of EWBR-type plates proved that the plate cladding process could be adapted to production facilities."
Date:
February 1958
Creator:
Bean, C. H.; Macherey, R. E. & Lindgren, J. R.
Object Type:
Report
System:
The UNT Digital Library
Aerodynamic Effects Caused by Icing of an Unswept NACA 65A004 Airfoil
From Summary: "The effects of ice formations on the section lift, drag, and pitching-moment coefficients of an unswept NACA 65A004 airfoil section of 6-foot chord were studied.. The magnitude of the aerodynamic penalties was primarily a function of the shape and size of the ice formation near the leading edge of the airfoil. The exact size and shape of the ice formations were determined photographically and found to be complex functions of the operating and icing conditions."
Date:
February 1958
Creator:
Gray, Vernon H. & von Glahn, Uwe H.
Object Type:
Report
System:
The UNT Digital Library
A Preliminary Study of the Effect of Boric Oxide Deposits on the Performance of Two Selected Turbine Stator-Blade Shapes
Report discussing testing on the performance of two stator-blade shapes with and without boric oxide deposits. The deposits were found to cause total pressure losses and decreases in the blade-exit flow angle. Information about the cascade throat area, boundary-layer momentum thickness, total pressure ratio, and exit flow angle and tangential component of velocity is provided.
Date:
February 25, 1958
Creator:
Setze, Paul C. & Nusbaum, William J.
Object Type:
Report
System:
The UNT Digital Library
Correlations Among Ice Measurements, Impingement Rates Icing Conditions, and Drag Coefficients for Unswept NACA 65A004 Airfoil
"An empirical relation has been obtained by which the change in drag coefficient caused by ice formations on an unswept NACA 65A004 airfoil section can be determined from the following icing and operating conditions: icing time, airspeed, air total temperature, liquid-water content, cloud droplet impingement efficiencies, airfoil chord length, and angles of attack. The correlation was obtained by use of measured ice heights and ice angles. These measurements were obtained from a variety of ice formations, which were carefully photographed, cross-sectioned, and weighed" (p. 1).
Date:
February 1958
Creator:
Gray, Vernon H.
Object Type:
Report
System:
The UNT Digital Library
A Wind Tunnel Investigation of Several Wingless Missile Configurations at Supersonic Speeds
Report presenting an investigation of several wingless missile configurations for a range of Mach numbers to determine their lift, drag, and pitching-moment coefficients. Results for missiles having nose controls and missiles having tail controls are provided. The results were also compared to a conventional missile with wings.
Date:
February 3, 1958
Creator:
Reese, David E., Jr.
Object Type:
Report
System:
The UNT Digital Library
Buffet Tests of an Attack-Airplane Model With Emphasis on Analysis of Data From Wind-Tunnel Tests
Memorandum presenting the buffet characteristics of a scale model of an attack airplane over a range of Mach numbers. The wing had a modified delta plan form with an NACA 0008 airfoil section at the root and an NACA 0005 airfoil section at the tip, a leading-edge sweep of 41.11 degrees, an aspect ratio of 2.91, and a taper ratio of 0.226. Results regarding the frequency spectrum of bending moment, effect of density on root-mean-square bending moment, system damping coefficients, and buffet input force are provided.
Date:
February 21, 1958
Creator:
Davis, Don D., Jr. & Wornom, Dewey E.
Object Type:
Report
System:
The UNT Digital Library
An Investigation of Supersonic Store Interference in the Vicinity of a 22 Degree Swept Wing Fuselage Configuration at Mach Numbers of 1.61 and 2.01
Pressure tunnel investigation of supersonic store interference in vicinity of 22 degree swept wing fuselage configuration at Mach numbers 1.61 and 2.01.
Date:
February 24, 1958
Creator:
Geier, Douglas J.
Object Type:
Report
System:
The UNT Digital Library
Experimental Behavior of Pentaborane-Air Combustion Products During Expansion in a Convergent Divergent Nozzle
"In order to evaluate the post combustion behavior of boric oxide, pentaborane-air mixtures, burned to completion at a combustor pressure of 3 atmospheres, were expanded through a 7.1-inch-long convergent-divergent nozzle having a 4-inch-diameter throat and an exit-to-throat area ratio of 1.68. The experimentally determined thrust performance was in good agreement with the ideal equilibrium performance at stagnation temperatures of 3300 deg R and lower. The boric oxide vapor at the combustor exit required about 400 degrees F supercooling before any condensed phase was observed" (p. 1).
Date:
February 18, 1958
Creator:
Branstetter, J. Robert & Setze, Paul C.
Object Type:
Report
System:
The UNT Digital Library
Impact on a Compressible Fluid
"Upon impact of a solid body on the plane surface of a fluid, there occurs on the vetted surface of the body an abrupt pressure rise which propagates into both media with the speed of sound. Below, we assume the case where the speed of propagation of sound in the body which falls on the surface of the fluid may be regarded as infinitely large in comparison with the speed of propagation of sound in the fluid; that is, we shall assume that the falling body is absolutely rigid. IN this case, the entire relative speed of the motion which takes place at the beginning of the impact is absorbed by the fluid" (p. 1).
Date:
February 1958
Creator:
Egorov, I. T.
Object Type:
Report
System:
The UNT Digital Library
Evaporation, Heat Transfer, and Velocity Distribution in Two-Dimensional and Rotationally Symmetrical Laminar Boundary-Layer Flow
The fundamental boundary layer equations for the flow, temperature and concentration fields are presented. Two dimensional symmetrical and unsymmetrical and rotationally symmetrical steady boundary layer flows are treated as well as the transfer boundary layer. Approximation methods for the calculation of the transfer layer are discussed and a brief survey of an investigation into the validity of the law that the Nusselt number is proportional to the cube root of the Prandtl number is presented.
Date:
February 1958
Creator:
Frössling, Nils
Object Type:
Report
System:
The UNT Digital Library
Investigation of Incipient Spin Characteristics of a 1/35-Scale Model of the Convair F-102A Airplane, Coord. No. AF-AM-79
From Summary: "Incipient spin characteristics have been investigated on a 1/35-scale dynamic model of the Convair F-102A airplane. The model was launched by a catapult apparatus into free flight with various control settings, and the motions obtained were photographed. The model was ballasted for the combat loading. All tests were made with the speed brakes and landing gear retracted, and engine effects were not simulated."
Date:
February 11, 1958
Creator:
Healy, Frederick M.
Object Type:
Report
System:
The UNT Digital Library
Transonic-Wind-Tunnel Tests of the Aerodynamic Characteristics of a 0.15-Scale Model of the North American Aviation 255-Inch Fin-Stabilized External Store, Coord No. AF-AM-4
"An investigation has been made in the Langley 8-foot transonic tunnels on the aerodynamic characteristics of a 0.15-scale model of the North American Aviation 255-inch fin-stabilized external store over a maximum Mach number range of 0.60 to 1.2 and on the effects of mounting lugs, of fin orientation, of fin aspect ratio, and of fixed-transition. The Reynolds number (based on a body length of 37.50 inches) varied from 9.8 x 10(exp 6) to 13.1 x 10(exp 6). The results indicate that the static margin of the finned store at low lift coefficients was only 9 percent of body length at subsonic Mach numbers and was reduced to zero at a Mach number of 1.0" (p. 1).
Date:
February 9, 1958
Creator:
Fischetti, Thomas L.
Object Type:
Report
System:
The UNT Digital Library
Qualitative Simulator Study of Longitudinal Stick Forces and Displacements Desirable During Tracking
In this study in which an airplane simulator with one degree of freedom (pitch) was used, results were determined for three conditions of airplane dynamics. For an undamped natural frequency of 1/2 cps with a damping ratio of 0.18 and for an undamped natural frequency of 1 cps with a damping ratio of 0.11, moderate longitudinal stick forces and displacements were desired.
Date:
February 1958
Creator:
Faber, Stanley
Object Type:
Report
System:
The UNT Digital Library
Flight Investigation of Effects of Atmospheric Turbulence and Moderate Maneuvers on Bending and Torsional Moments Encountered by a Helicopter Rotor Blade
Note presenting flight tests conducted with a medium-size single-rotor helicopter, of which one blade was equipped with strain gages, to determine the relative effects of atmospheric turbulence and moderate maneuvers on the periodic rotor blade moments. The results indicate no significant increase in the total blade moments due to atmospheric turbulence of moderate pull-up maneuvers which produced center-of-gravity acceleration increments of less than about 0.15g. Results regarding moment records, maximum vibratory moments, harmonic analysis of moment records, and applicability of NACA helicopter VGHN recorder surveys are provided.
Date:
February 1958
Creator:
Ludi, LeRoy H.
Object Type:
Report
System:
The UNT Digital Library
Temperature-Pressure-Time Relations in a Closed Cryogenic Container
Note presenting an experimental study using liquid nitrogen made to verify the existence of a temperature gradient as the factor causing the increase in pressure and to investigate the effect on pressure of altering the temperature gradient. The effect on pressure of different heat-leak rates into the container and different quantities of liquid was also investigated. Results regarding the typical pressure history and temperature gradient, effect of stirring liquid on pressure, effect of heat-leak rate and liquid content on pressure, and effect of vapor mixing on pressure are provided.
Date:
February 1958
Creator:
Huntley, Sidney C.
Object Type:
Report
System:
The UNT Digital Library
Creep of Aluminum-Copper Alloys During Age Hardening
Note presenting a study of the interrelation of aging during creep and of creep during aging in polycrystalline aluminum alloys containing 1 to 4 percent copper. Experimental procedures included interrupted creep tests, tensile tests of crept specimens, quantitative metallographic determination of the percent precipitation during creep, hardness measurements on unstressed and stressed aged alloys, X-ray studies of deformation in the crystalline lattice, and microscopic examination of the surface-deformation markings.
Date:
February 1958
Creator:
Underwood, E. E.; Marsh, L. L. & Manning, G. K.
Object Type:
Report
System:
The UNT Digital Library
Experimental Thermal Conductivities of the N2D4 Is in Equilibrium to 2NO2 System
Report presenting an investigation of direct measurements of the thermal conductivity of reacting gas systems. The hot-wire measurement technique was used at a range of temperatures and pressures. A comparison of the theoretical and experimental results are provided.
Date:
February 1958
Creator:
Coffin, Kenneth P. & O'Neal, Cleveland, Jr.
Object Type:
Report
System:
The UNT Digital Library
Drag Minimization for Wings in Supersonic Flow, With Various Constraints
Report presenting a study of the minimization of inviscid fluid drag for thin aerodynamic shapes subject to imposed constraints on lift, pitching moment, base area, or volume. The problem is transformed to one or determining a two-dimensional potential flow satisfying either Laplace's or Poisson's equations with boundary values fixed by the imposed conditions.
Date:
February 1958
Creator:
Heaslet, Max A. & Fuller, Franklyn B.
Object Type:
Report
System:
The UNT Digital Library
Charts Relating the Compressive and Shear Buckling Stresses of Longitudinally Supported Plates to the Effective Deflectional Stiffness
"A stability analysis is made of long flat rectangular plates subjected to both shear and compressive loads. The edges of the plates are taken to be simply supported and the plates are supported along one or two intermediate longitudinal lines by lines of deflectional springs (elastic line supports). The results of the analysis are presented in the form of charts that are useful in the determination of the buckling load of plates stiffened by stringers or webs" (p. 1).
Date:
February 1958
Creator:
Johnson, Aldie E., Jr.
Object Type:
Report
System:
The UNT Digital Library
Turbulent Flow Through Porous Resistances Slightly Inclined to the Flow Direction
"Analytical and experimental studies have been made of the channel flow of air through porous resistances inclined at an angle of 3.5 degrees to the axis of the channel with the air discharging to the atmosphere. These studies determine the channel wall shape that would yield a uniform discharge through the porous resistance" (p. 1).
Date:
February 1958
Creator:
Loeffler, Albert L., Jr. & Perlmutter, Morris
Object Type:
Report
System:
The UNT Digital Library
Comparison of hydrodynamic-impact acceleration and response for systems with single and with multiple elastic modes
Report presenting hydrodynamic impact testing made with a multimode elastic model consisting of a rigid prismatic float and a flexible wing and a comparison with similar experimental results for a single-mode system and with theoretical solutions. Testing was conducted in smooth water at two fixed trims and two flight-path angles over a range of velocities. Results regarding accelerations, time histories, oscillatory accelerations, elastic-body acceleration data, and rigid-body acceleration data are provided.
Date:
February 1958
Creator:
Miller, Robert W.
Object Type:
Report
System:
The UNT Digital Library