Collection
Technical Report Archive and Image Library
431
National Advisory Committee for Aeronautics Collection
366
Texas Attorney General Opinions
258
Office of Scientific & Technical Information Technical Reports
93
TRAIL Microcard Collection
44
World War Two Collection
24
Government Documents A to Z Digitization Project
23
World War Two Newsmaps
18
Texas State Publications
15
USDA Farmers' Bulletins
4
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841 Matching Results
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Compressibility and Heating Effects on Pressure Loss and Cooling of a Baffled Cylinder Barrel
Report presenting testing to obtain experimental confirmation of the effect of air compressibility on cooling and pressure loss of a baffled cylinder barrel and to evaluate various methods of analysis. Testing occurred over a wide range of air flows and density altitudes.
Date:
July 1944
Creator:
Goldstein, Arthur W. & Ellerbrock, Herman H., Jr.
Object Type:
Report
System:
The UNT Digital Library
NACA Mach number indicator for use in high-speed tunnels
Report presenting a description of a device for indicating stream Mach number in a high-speed tunnel. It consists of a mechanism for determining the pressure ratio that Mach number is a function of. The instrument is in service in the 8-foot high-speed tunnel and its accuracy has been found adequate for wind-tunnel requirements.
Date:
July 1943
Creator:
Smith, Norman F.
Object Type:
Report
System:
The UNT Digital Library
On a New Method for Calculating the Potential Flow Past a Body of Revolution
Report presenting a new method for obtaining the velocity potential of the flow about a solid of revolution moving uniformly in the direction of its axis of symmetry in a fluid otherwise at rest. The method is based essentially on the fact that the form of the differential equation for the velocity potential is invariant with regard to conformal transformations in a meridian plane. The general results are applied to a body of revolution obtained by revolving a symmetrical Joukowski profile about its axis of symmetry.
Date:
July 1942
Creator:
Kaplan, Carl
Object Type:
Report
System:
The UNT Digital Library
The development and application of high-critical-speed nose inlets
From Summary: "An analysis of the nose-inlet shapes developed in previous investigations to represent the optimum from the standpoint of critical speed has shown that marked similarity exists between the nondimensional profiles of inlets which have widely different proportions and critical speeds. With the nondimensional similarity of such profiles established, the large differences in the critical speeds of these nose inlets must be a function of their proportions. An investigation was undertaken in the Langley 8-foot high-speed tunnel to establish the effects of nose-inlet proportions on critical Mach number and to develop a rational method for the design of high-critical-speed nose inlets to meet desired requirements."
Date:
July 1945
Creator:
Baals, Donald D.; Smith, Norman F. & Wright, John B.
Object Type:
Report
System:
The UNT Digital Library
Wind-Tunnel Investigation of the Effects of Spoilers on the Characteristics of a Low-Drag Airfoil Equipped With a 0.25-Chord Slotted Flap
Report discussing the effects of circular-arc spoilers on the section characteristics of an NACA 66,2-216 airfoil with a 0.25-chord slotted flap. Spoilers were tested on the upper surface of the airfoil, on the lower surface, and on both simultaneously. Only the simultaneous placement of spoilers was found to provide satisfactory results as a lateral control device.
Date:
July 23, 1945
Creator:
Holtzclaw, Ralph W.
Object Type:
Report
System:
The UNT Digital Library
Determination of General Relations for the Behavior of Turbulent Boundary Layers
Report presenting an analysis of data for turbulent boundary layers along wings and bodies of various shapes in order to determine the fundamental variables that control the development of turbulent boundary layers. Results indicate that the type of velocity distribution in the boundary layer could be expressed in terms of a single parameter.
Date:
July 1943
Creator:
von Doenhoff, Albert E. & Tetervin, Neal
Object Type:
Report
System:
The UNT Digital Library
Comparison of Vee-Type and Conventional Tail Surfaces in Combination with Fuselage and Wing in the Variable-Density Tunnel
"The pitching and the yawing moments of a vee-type and a conventional type of tail surface were measured. The tests were made in the presence of a fuselage and a wing-fuselage combination in such a way as to determine the moments contributed by the tail surfaces" (p. 1).
Date:
July 1941
Creator:
Greenberg, Harry
Object Type:
Report
System:
The UNT Digital Library
Considerations of the Total Drag of Supersonic Airfoil Sections
The results of calculations of the viscous and pressure drags of some two-dimensional supersonic airfoils at zero lift are presented. The results indicate that inclusion of viscous drag alters many previous results regarding the desirability of certain airfoil shapes for securing low drags at supersonic speeds. At certain Reynolds and Mach numbers, for instance, a circular-arc airfoil may theoretically have less drag than the previously advocated symmetrical wedge-shape profile; although under different conditions, the circular-arc airfoil may have a higher drag.
Date:
July 1947
Creator:
Ivey, H. Reese & Klunker, E. Bernard
Object Type:
Report
System:
The UNT Digital Library
Tactical employment : tank destroyer unit.
"This manual is a guide to the tactical employment of tank destroyer units both self-propelled and towed." (Page 1.)
Date:
July 18, 1944
Creator:
United States. War Department.
Object Type:
Book
System:
The UNT Digital Library
The Effect of Increased Cooling Surface on Performance of Aircraft-Engine Cylinders as Shown by Tests of the NACA Cylinder
Report presenting a method of constructing fins of nearly optimum proportions to the point where a cylinder has been manufactured and tested. Data were obtained on cylinder temperature for a wide range of inlet-manifold pressures, engine speeds, and cooling-pressure differences. Results regarding cooling equations, cylinder-temperature relationships, and a comparison of three cylinder cooling performances are provided.
Date:
July 1944
Creator:
Schey, Oscar W.; Rollin, Vern G. & Ellerbrock, Herman H., Jr.
Object Type:
Report
System:
The UNT Digital Library
Ordnance maintenance : 3-inch antiaircraft gun matériel, M2A2, M2A1, M1A2, M1A1, T1A2, and T1A1
Provides instructions for inspection, disassembly and assembly, and maintenance and repair of 3-inch antiaircraft gun matériel, including the use of special repair tools.
Date:
July 25, 1940
Creator:
United States. War Department.
Object Type:
Book
System:
The UNT Digital Library
Ordnance maintenance : prismatic compass, M1918.
Describes the Prismatic Compass, M1918 and provides instructions for its operation, maintenance, and its functions in relation to various types of field artillery.
Date:
July 17, 1941
Creator:
United States. War Department.
Object Type:
Book
System:
The UNT Digital Library
Orientation
Provides a text and reference book covering the principles of orientation. Orientation is defined as "the accurate location of datum points and the establishment of lines of known length and direction".
Date:
July 15, 1941
Creator:
United States. War Department.
Object Type:
Book
System:
The UNT Digital Library
Inspection and Preventive Maintenance Services for Kitchen Equipment.
"This Technical Manual describes the inspections and services necessary to maintain the efficiency and prolong the life of kitchen equipment."
Date:
July 1945
Creator:
United States. War Department.
Object Type:
Book
System:
The UNT Digital Library
How to Keep and Increase Black Grama on Southwestern Ranges.
Describes the benefits of having black grama on ranges in the Southwestern United States, as well as how to use and manage it.
Date:
July 1948
Creator:
Campbell, Robert S. (Robert Samuel), 1904- & Crafts, Edward C. (Edward Clayton), 1910-
Object Type:
Book
System:
The UNT Digital Library
National Motor-Gasoline Survey: Winter 1947-48
Report issued by the Bureau of Mines on the motor-fuels sold during the winter of 1947-1948. Characteristics of the fuel samples obtained are listed. This report includes tables, graphs, and a map.
Date:
July 1948
Creator:
Blade, O. C.
Object Type:
Report
System:
The UNT Digital Library
Zinc-Lead Ore Reserves of the Tri-State District, Missouri-Kansas-Oklahoma
Report issued by the Bureau of Mines over studies of zinc-lead reserves in the tri-state area. The results of the studies are presented. This report includes tables, maps, and illustrations.
Date:
July 1949
Creator:
Ruhl, Otto; Allen, Simeon A. & Holt, Stephen P.
Object Type:
Report
System:
The UNT Digital Library
National Motor-Gasoline Survey: Winter 1948-49
Report issued by the Bureau of Mines over surveys conducted on the motor fuels sold during the winter of 1948-1949. The properties of the fuels sampled are presented. This report includes tables, graphs, and maps.
Date:
July 1949
Creator:
Blade, O. C.
Object Type:
Report
System:
The UNT Digital Library
Manganese Investigations - Metallurgical Division: 14. Hydrometallurgical Studies of Manganses Ores
Report issued by the U.S. Bureau of Mines regarding laboratory tests conducted on acid leaching of manganese ore. Descriptions of the methods used in testing and results are presented. This report contains tables, and graphs.
Date:
July 1942
Creator:
Anderson, Clarence Travis
Object Type:
Report
System:
The UNT Digital Library
Use of Subaudible Noises for the Prediction of Rock Bursts
Report issued by the U.S. Bureau of Mines on testing of sub-audible noises and accuracy of rock burst predictions. The history of this study, and the results of these investigations are presented. This report includes tables, graphs, illustrations, and diagrams.
Date:
July 1942
Creator:
Obert, Leonard & Duvall, Wilbur
Object Type:
Report
System:
The UNT Digital Library
Gas Injection into the McClosky Limestone in the Griffin and New Harmony Oil Fields, Indiana and Illinois
Report issued by the U.S. Bureau of Mines conducted a study on the injection of gas into the McClosky limestone in northern Illinois and Indiana. The resulting increases in oil and gas production from this area are presented. The report includes maps, graphs, tables, and illustrations.
Date:
July 1945
Creator:
Riggs, C. H.
Object Type:
Report
System:
The UNT Digital Library
Exploration of the Avon Mica District, Latah County, Idaho
Report issued by the U.S. Bureau of Mines on the investigations conducted on the mica deposits found in Latah County, Idaho. Characteristics and properties of the mica deposits are listed. This report includes tables, and maps.
Date:
July 1946
Creator:
Reed, Glen C.
Object Type:
Report
System:
The UNT Digital Library
National Motor-Gasoline Survey: Winter 1945-46
Report issued by the U.S. Bureau of Mines on the motor fuels sold during the winter of 1945-46. The characteristics of the fuels sold, and the regions they were sold in are listed. This report includes tables, and maps.
Date:
July 1946
Creator:
Blade, O. C. & Sponsler, C. R.
Object Type:
Report
System:
The UNT Digital Library
Logging farm forest crops in the Northeast.
A step-by-step guide to logging the forests of the northeastern United States. Includes information about the tools and equipment used, including axes, saws, and tractors, as well as the use of horses.
Date:
July 1949
Creator:
Simmons, Fred C. (Fred Charles), 1905-
Object Type:
Book
System:
The UNT Digital Library