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Technical Report Archive and Image Library
136
National Advisory Committee for Aeronautics Collection
67
TRAIL Microcard Collection
33
Office of Scientific & Technical Information Technical Reports
27
Texas Attorney General Opinions
14
Government Documents A to Z Digitization Project
3
USDA Farmers' Bulletins
3
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2
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47
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27
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20
Atomic Energy Commission Reports
17
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7
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7
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7
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6
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5
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5
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182 Matching Results
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1 - 24 of
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Rice production in the southern states.
Describes the best climate, soils, and irrigation systems for producing rice successfully in the southern United States.
Date:
July 1952
Creator:
Jones, Jenkin W. (Jenkin William), 1888-; Dockins, J. O.; Walker, R. K. (Rufus K.) & Davis, W. C.
Object Type:
Book
System:
The UNT Digital Library
Control of potato insects.
Discusses various insect pests of the Irish potato and how to recognize them. Provides instructions for preparing and applying insecticides.
Date:
July 1952
Creator:
Dudley, J. E.; Landis, B. J. (Birely J.), 1904- & Shands, Wayland Arthur, 1905-
Object Type:
Book
System:
The UNT Digital Library
Diseases of Swine.
Describes the characteristics of a variety of diseases of swine, and methods for their prevention and treatment.
Date:
July 1952
Creator:
Stein, C. D. (Clarence Dinsmore), b. 1889; Manthei, C. A. (Chester Alfred), 1909-; Shuman, R. D. & Torrey, J. P.
Object Type:
Book
System:
The UNT Digital Library
A Probability Analysis of the Meteorological Factors Conducive to Aircraft Icing in the United States
Note presenting meteorological icing data obtianed in flight in the United States that is analyzed statistically and used to develop methods for the determination of the various simultaneous combinations of the three basic icing parameters and the probability of exceeding any specified group of values of liquid-water content associated simultaneously with temperature and drop-diameter values. A mathematical basis is also provided for the future statistical analysis of meteorological icing data that can be obtained throughout the world.
Date:
July 1952
Creator:
Lewis, William & Bergrun, Norman R.
Object Type:
Report
System:
The UNT Digital Library
A blade-element analysis for lifting rotors that is applicable for large inflow and blade angles and any reasonable blade geometry
Report presenting some simple approximate solutions that are derived for the relationships between rotor thrust and flight path velocity components and the rotor blade angle, torque, and in-plane forces.
Date:
July 1952
Creator:
Castles, Walter, Jr. & New, Noah C.
Object Type:
Report
System:
The UNT Digital Library
The theoretical characteristics of triangular-tip control surfaces at supersonic speeds: Mach lines behind trailing edges
Report presenting generalized expressions in closed form obtained for the characteristics due to control-surface deflection and wing angle of attack for wing plan forms with triangular-tip control surfaces at supersonic speeds. Charts are presented for the deflection characteristics for configurations having the sweep of the wing and control-surface trailing edges equal and for the location of the hinge line for balanced controls.
Date:
July 1952
Creator:
Kainer, Julian H. & King, Mary Dowd
Object Type:
Report
System:
The UNT Digital Library
Effects of Aspect Ratio on Air Flow at High Subsonic Mach Numbers
Schlieren photographs were used in an investigation to determine the effects of changing the aspect ratio from infinity to 2 on the air flow past a wing at high subsonic Mach numbers. The results indicated that the decreased effects of compressibility on drag coefficients for the finite wing are produced by a reduction in the compression shock and flow separation.
Date:
July 1952
Creator:
Lindsey, W. F. & Humphreys, Milton D.
Object Type:
Report
System:
The UNT Digital Library
Investigation of the influence of fuselage and tail surfaces on low-speed static stability and rolling characteristics of a swept-wing model
Results are presented of a wind-tunnel investigation to determine influence of the fuselage and tail on static stability and rotary derivatives in roll of a model having 45 degrees sweptback wing and tail surfaces. The wing alone and the model without the horizontal tail showed marginal longitudinal stability near maximum lift. The longitudinal stability of the complete model was satisfactory. The vertical tail produced larger increments of rate of change of lateral-force and yawing-moment coefficients with wing-tip helix angle than the fuselage or the horizontal tail.
Date:
July 1952
Creator:
Bird, John D.; Lichtenstein, Jacob H. & Jaquet, Byron M.
Object Type:
Report
System:
The UNT Digital Library
Numerical determination of indicial lift and moment functions for a two-dimensional sinking and pitching airfoil at Mach numbers 0.5 and 0.6
Report presenting the indical lift and moment functions for sinking and pitching motion at Mach numbers 0.5 and 0.6. The functions are determined from a knowledge of existing oscillatory coefficients at low reduced frequencies and from approximate expressions of the coefficients at high reduced frequencies. Results regarding determination of indical functions, considerations for indical lift due to penetration of a sharp-edge gust, and approximation of indical functions by analytic expressions are provided.
Date:
July 1952
Creator:
Mazelsky, Bernard & Drischler, Joseph A.
Object Type:
Report
System:
The UNT Digital Library
Experimental investigation of the local and average skin friction in the laminar boundary layer on a flat plate at a Mach number of 2.4
Report presenting average and local skin-friction coefficients for laminar flow on a plate plate at Mach number 2.4 and compared with the laminar-boundary-layer theory of Chapman and Rubesin. The average skin-friction coefficients were calculated by the momentum-loss method from impact-pressure surveys of the boundary layer.
Date:
July 1952
Creator:
Maydew, Randall C. & Pappas, Constantine C.
Object Type:
Report
System:
The UNT Digital Library
Plastic Stress-Strain Relations for Combined Tension and Compression
Note presenting an investigation to determine the validity of the plasticity theories and the correctness of various assumptions made in these theories. Plastic stress-strain relations for biaxial tension-compression principal stresses were determined for a 14S-T4 aluminum alloy. Since the constant-stress-ratio tests cannot distinguish between the flow and deformation theories, variable-stress-ratio tests and special biaxial tests were conducted.
Date:
July 1952
Creator:
Marin, Joseph & Wiseman, H. A. B.
Object Type:
Report
System:
The UNT Digital Library
A probability analysis of the meteorological factors conducive to aircraft icing in the United States
Report presenting an analysis of meteorological icing data obtained in flight and some methods developed for the determination of the various simultaneous combinations of the three basic icing parameters (liquid-water content, drop diameter, and temperature) which would have equal probability of being exceeded in flight, the probability of exceeding any specified group of values of liquid-water content associated with temperature and drop-diameter values in specified ranges. These methods can be used to design ice prevention equipment for aircraft.
Date:
July 1952
Creator:
Lewis, William & Bergrun, Norman R.
Object Type:
Report
System:
The UNT Digital Library
Boundary-layer development and skin friction at mach number 3.05
Experimental and theoretical results are presented for boundary layer studies consisting of Schlieren observations and momentum surveys made on hollow cylinder models with their axes aligned parallel to the stream. Results were obtained for three model diameters and for natural and artificially induced turbulent boundary layer flows.
Date:
July 1952
Creator:
Brinich, Paul F. & Diaconis, Nick S.
Object Type:
Report
System:
The UNT Digital Library
Practical Calculation of Second-Order Supersonic Flow Past Nonlifting Bodies of Revolution
"Calculation of second-order supersonic flow past bodies of revolution at zero angle of attack is described in detail, and reduced to routine computation. Use of an approximate tangency condition is shown to increase the accuracy for bodies with corners. Tables of basic functions and standard computing forms are presented. The procedure is summarized so that one can apply it without necessarily understanding the details of the theory" (p. 1).
Date:
July 1952
Creator:
Van Dyke, Milton D.
Object Type:
Report
System:
The UNT Digital Library
Influence of Chemical Composition on Rupture Test Properties at 1500 Degrees Fahrenheit of Forged Chromium-Cobalt-Nickel-Iron Base Alloys
Note presenting an investigation of the influence of systematic variations of chemical composition on rupture properties at 1500 degrees Fahrenheit for 62 modifications of a basic alloy. All of the elements in the alloy can be varied individually between quite wide limits without significantly changing the rupture properties. Results regarding carbon, nitrogen, manganese, silicon, chromium, nickel, cobalt, molybdenum, tungsten, and columbium are provided.
Date:
July 1952
Creator:
Freeman, J. W.; Ewing, J. F. & White, A. E.
Object Type:
Report
System:
The UNT Digital Library
Preview of Behavior of Grain Boundaries in Creep of Aluminum Bicrystals
Note presenting testing of the gliding of one metal crystal with respect to another, along their mutual grain boundary, during high-temperature creep tests conducted with bicrystals of pure aluminum. Stresses of from 1 to 100 psi and temperatures from 200 to 650 degrees Celsius were employed. Results regarding grain boundary glide rate, influence of orientation difference between grains, influence of temperature, influence of applied stress, structure of the operated grain boundary, and structural changes within grains are provided.
Date:
July 1952
Creator:
Rhines, F. N. & Cochardt, A. W.
Object Type:
Report
System:
The UNT Digital Library
Measurements of flying qualities of an F-47D-30 airplane to determine lateral and directional stability and control characteristics
Report presenting flight tests to determine the lateral and directional stability and control characteristics of an F-47D-30 airplane. Results regarding the physical characteristics, static directional and lateral stability and control characteristics, dynamic directional stability and control characteristics, directional and lateral trim characteristics, and aileron control characteristics are provided.
Date:
July 1952
Creator:
Goranson, R. Fabian & Kraft, Christopher C., Jr.
Object Type:
Report
System:
The UNT Digital Library
An analysis of the normal accelerations and airspeeds of a two-engine type of transport airplane in commercial operations on routes in the central United States from 1948 to 1950
Report presenting normal-acceleration and airspeed data obtained from V-G recorders installed in a two-engine type of transport airplane, employed in routine commercial operation in the United States for two years, which was analyzed to determine the gust and gust-load experiences of the airplane. Results regarding the acceleration experience, gust experience, average operating airspeed, maximum airspeed, comparison of predicted gust envelopes, and predicted gust-load envelopes are provided.
Date:
July 1952
Creator:
Walker, Walter G. & Schumacher, Paul W. J.
Object Type:
Report
System:
The UNT Digital Library
Experiments in External Noise Reduction of a Small Pusher-Type Amphibian Airplane
Note presenting a study that is part of a program to find practicable ways of reducing the external noise level of light airplanes. This particular report deals with noise measurements on a representative pusher-type amphibian airplane. Testing was made with a standard pusher-type airplane, the same airplane with a four-bladed propeller, a modified version with a geared engine and four-bladed propeller but no exhaust muffler, and a modified version with a geared engine, exhaust muffler, and propellers varying in number of blades from three to eight.
Date:
July 1952
Creator:
Roberts, John P. & Beranek, Leo L.
Object Type:
Report
System:
The UNT Digital Library
Choking of a Subsonic Induction Tunnel by the Flow from an Induction Nozzle
Note presenting experimental data demonstrating the decrease in stream Mach number observed to occur as the pressure of the inducing air in an induction nozzle was increased in the high-subsonic speed range. This performance characteristic was analytically demonstrated to be associated with choking of the induced flow.
Date:
July 1952
Creator:
Lindsey, W. F.
Object Type:
Report
System:
The UNT Digital Library
A Method of Selecting the Thickness, Hollowness, and Size of a Supersonic Wing for Least Drag and Sufficient Bending Strength at Specified Flight Conditions
Note presenting a consideration of a wing-selection problem sometimes encountered in the preliminary design of supersonic airplanes and missiles. The problem is to determine the span, section thickness ratio, and skin thickness or hollowness ratio of the wing of least drag when the plan form, section shape, wing lift requirement, and flight conditions are assumed known. An example of the application of the method to a diamond wing at Mach number 2.0 for a range of specified flight conditions is presented.
Date:
July 1952
Creator:
Amick, James L.
Object Type:
Report
System:
The UNT Digital Library
Matrix and Relaxation Solutions That Determine Subsonic Through Flow in an Axial-Flow Gas Turbine
Note presenting a method recently developed for determining the steady flow of a nonviscous compressible fluid along a relative stream surface between adjacent blades in a turbomachine, which was applied to investigate the subsonic through flow in a single-stage axial-flow gas turbine. In all solutions considered in the investigation, convergence was obtained without difficulty. Results regarding incompressible solutions and compressible solutions are provided.
Date:
July 1952
Creator:
Wu, Chung-Hua
Object Type:
Report
System:
The UNT Digital Library
Span load distributions resulting from angle of attack, rolling, and pitching for tapered sweptback wings with streamwise tips: Supersonic leading and trailing edges
Report presenting the span load distributions resulting from constant angle of attack, steady rolling, and steady pitching for a series of thin sweptback tapered wings with streamwise tips and supersonic leading and trailing edges. The results of the analysis are presented as a series of design charts.
Date:
July 1952
Creator:
Martin, John C. & Jeffreys, Isabella
Object Type:
Report
System:
The UNT Digital Library
An Investigation of the Effect of the WADC 30,000-Horsepower Whirl Rig Upon the Static Characteristics of a Propeller
"Tests have been made at the Langley Aeronautical Laboratory on a 6000-horsepower propeller dynamometer installed at a ground test facility to determine the effect of a half-scale model of the Wright Aeronautical Development Center 30,000-horsepower whirl rig upon the aerodynamic characteristics of a three-blade NACA 10-(3)(062)-045 propeller. The model of the whirl rig was mounted in front of the 6000-horsepower propeller dynamometer. Static propeller tests were made for 0deg, 5deg, 10deg, 15deg, and 20deg blade angles over a range of rotational speeds from 600 to 2200 rpm in 100-rpm increments" (p. 1).
Date:
July 2, 1952
Creator:
Salters, Leland B., Jr. & Norton, Harry T., Jr.
Object Type:
Report
System:
The UNT Digital Library