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Congressional Research Service Reports
1,510
Office of Scientific & Technical Information Technical Reports
1,448
Technical Report Archive and Image Library
336
National Advisory Committee for Aeronautics Collection
201
Government Accountability Office Reports
140
TRAIL Microcard Collection
105
Texas State Publications
40
John F. Kennedy Memorial Collection
19
John F. Kennedy, Dallas Police Department Collection
19
Harris and Eliza Kempner
18
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Report of the Comptroller of Public Accounts of the State of Texas: 1888
Annual report of the Texas Comptroller of Public Accounts documenting financial records including disbursements and transactions made by the office during fiscal year 1888. Index starts on page iii.
Date:
November 5, 1888
Creator:
Texas. Comptroller's Office.
System:
The Portal to Texas History
Life Zones and Crop Zones of New Mexico
Discusses geography, climate, agricultural practices, and crops of each life zone in New Mexico. Provides mammal, breeding bird, reptile, amphibian, and plant species list for each zone. Includes a life zone map.
Date:
September 5, 1913
Creator:
Bailey, Vernon
System:
The UNT Digital Library
Revision of the American Harvest Mice: (Genus Reithrodontomys)
Discusses history, specimens, habits, economic status, food, and pelages of American harvest mice. Lists locations and provides a key to species and subspecies, and provides species descriptions.
Date:
June 5, 1914
Creator:
Howell, Arthur H.
System:
The UNT Digital Library
On a New Exogyra From the Del Rio Clay and Some Observations on the Evolution of Exogyra in the Texas Cretaceous
Report describing a newly discovered type of oyster in the Texas Cretaceous stratigraphical zone.
Date:
January 5, 1919
Creator:
Böse, Emil, 1868-1927
System:
The UNT Digital Library
Formulas, Tables and Curves for Computing the Mutual Inductance of Two Coaxial Circles
Scientific paper issued by the Bureau of Standards over the mutual inductance of two coaxial circles. As stated in the abstract, "a number of examples are given to show the methods of computation by the different formulas, tables, and charts" (p. 541). This paper includes tables, and illustrations.
Date:
August 5, 1924
Creator:
Curtis, Harvey L. & Sparks, C. Matilda
System:
The UNT Digital Library
Motor-Vehicle Headlighting
A report on the necessity of improved motor-vehicle lighting.
Date:
August 5, 1925
Creator:
Carlson, R. E.
System:
The UNT Digital Library
Annual Report of the Boy Scouts of America: 1925
Annual report submitted by the Boy Scouts of America to Congress describing highlights from 1926, activities, finance, organizational leadership, and other information about scouting programs.
Date:
June 5, 1926
Creator:
Boy Scouts of America
System:
The Portal to Texas History
Tests on Models of Three British Airplanes in the Variable Density Wind Tunnel
"This report contains the results of tests made in the National Advisory Committee for Aeronautics variable density wind tunnel on three airplane models supplied by the British Aeronautical Research Committee. These models, the BE-2E with R.A.F. 19 wings, the British Fighter with R.A.F. 15 wings, and the Bristol Fighter with R.A.F. 30 wings, were tested over a wide range in Reynolds numbers in order to supply data desired by the Aeronautical Research Committee for scale effect studies. The maximum lifts obtained in these tests are in excellent agreement with the published results of British tests, both model and full scale" (p. 451).
Date:
April 5, 1927
Creator:
Higgins, George J.; Diehl, W. S. & DeFoe, George L.
System:
The UNT Digital Library
Drag and Cooling With Various Forms of Cowling for A "Whirlwind" Radial Air-Cooled Engine - 1
"This report presents the results of an investigation undertaken in the 20-foot Propeller Research Tunnel at Langley Field on the cowling of radial air-cooled engines. A portion of the investigation has been completed, in which several forms and degrees of cowling were tested on Wright "Whirlwind" J-5 engine mounted in the nose of a cabin fuselage. The cowlings varied from the one extreme of an entirely exposed engine to the other in which the engine was entirely inclosed. Cooling tests were made and each cowling modified, if necessary, until the engine cooled approximately as satisfactorily as when it was entirely exposed" (p. 165).
Date:
October 5, 1928
Creator:
Weick, Fred E.
System:
The UNT Digital Library
Full-scale tests of metal propellers at high tip speeds
This report describes tests of 10 full-scale metal propellers of several thickness ratios at various tip speeds up to 1,350 feet per second. The results indicate no loss of efficiency up to tip speeds of approximately 1,000 feet per second. Above this tip speed the loss is at a rate of about 10 per cent per 100 feet per second increase relative to the efficiency at the lower speeds for propellers of pitch diameter ratios 0.3 to 0.4. Propellers having sections of small thickness ratio can be run at slightly higher speeds than thick ones before beginning to lose efficiency.
Date:
November 5, 1930
Creator:
Wood, Donald H.
System:
The UNT Digital Library
Wind-Tunnel Research Comparing Lateral Control Devices, Particularly at High Angles of Attack 3: Ordinary Ailerons Rigged Up 10 Degrees When Neutral
This report presents the results of wind-tunnel tests made on three model wings having different sizes of ordinary ailerons rigged up 10 degrees when neutral, the same models having previously been tested with the ailerons rigged even with the wings in the usual manner. One of the wings had ailerons of medium size, 25 per cent of the wing chord by 40 per cent of the semispan, one had long, narrow ailerons, and one had short, wide ones. These tests are part of a general investigation on lateral control devices, with particular reference to the control at high angles of attack, in which all the devices are being subjected to the same series of tests in the 7 by 10 foot wind tunnel of the National Advisory Committee for Aeronautics.
Date:
February 5, 1932
Creator:
Weick, Fred E. & Wenzinger, Carl J.
System:
The UNT Digital Library
Characteristics of Clark Y airfoils of small aspect ratios
This report presents the results of a series of wind tunnel tests showing the force, moment, and autorotational characteristics of Clark Y airfoils having aspect ratios varying from 0.5 to 3. An airfoil of rectangular plan form was tested with rectangular tips, flared tips, and semicircular tips. Tests were also made on one airfoil of circular plan form and two airfoils of elliptical plan form. The tests revealed a marked delay of the stall and a decided increase in values of maximum lift coefficient and maximum resultant force coefficient for aspect ratios of the order of 1 as compared with values for aspect ratios of 2 and 3.
Date:
May 5, 1932
Creator:
Zimmerman, C. H.
System:
The UNT Digital Library
Stability of Thin-Walled Tubes Under Torsion
"In this report a theoretical solution is developed for the torsion on a round thin-walled tube for which the walls become unstable. The results of this theory are given by a few simple formulas and curves which cover all cases. The differential equations of equilibrium are derived in a simpler form than previously found, it being shown that many items can be neglected" (p. 3).
Date:
May 5, 1933
Creator:
Donnell, L. H.
System:
The UNT Digital Library
The interference between struts in various combinations
This report presents the results of wind tunnel tests made to determine the interference drag arising from various arrangements of streamline struts and round struts, or cylinders. Determinations were made of the interference drag of struts spaced side by side, struts in tandem, tandem struts encased in a single fairing, a strut intersecting a plane, and struts intersecting to form a v. Three sizes of struts were used for most of the tests. These tests show that the interference drag arising from struts in close proximity may be of considerable magnitude, in some instances amounting to more than the drag of the struts themselves.
Date:
June 5, 1933
Creator:
Biermann, David & Herrnstein, William H., Jr.
System:
The UNT Digital Library
Manual of Fire-Loss Prevention
Principles of fire-resistance classifications of building types and materials, general methods for controlling the spread of fire, and general fire-prevention measures.
Date:
November 5, 1934
Creator:
unknown
System:
The UNT Digital Library
Reduction of hinge moments of airplane control surfaces by tabs
This report presents the results of an investigation conducted in the NACA 7 by 10-foot wind tunnel of control surfaces equipped with tabs for reducing the control forces or trimming the aircraft. Two sizes of ordinary ailerons with several sizes of attached and inset tabs were tested on a Clark y wing. Tabs were also tested in combination with auxiliary balances of the horn and paddle types, and with a frise balance aileron.
Date:
February 5, 1935
Creator:
Harris, Thomas A.
System:
The UNT Digital Library
Ector County, Texas: Records of wells, driller's logs, water analyses, and map showing location of wells
Data complied regarding wells and other water resources, including water quality analysis, measurements, and other relevant information.
Date:
August 5, 1937
Creator:
United States. Work Projects Administration.
System:
The Portal to Texas History
Auto-Ignition and Combustion of Diesel Fuel in a Constant-Volume Bomb
Report presents the results of a study of variations in ignition lag and combustion associated with changes in air temperature and density for a diesel fuel in a constant-volume bomb. The test results have been discussed in terms of engine performance wherever comparisons could be drawn. The most important conclusions drawn from this investigation are: the ignition lag was essentially independent of the injected fuel quantity. Extrapolation of the curves for the fuel used shows that the lag could not be greatly decreased by exceeding the compression-ignition engines. In order to obtain the best combustion and thermal efficiency, it was desirable to use the longest ignition lag consistent with a permissible rate of pressure rise.
Date:
October 5, 1937
Creator:
Selden, Robert F.
System:
The UNT Digital Library
Design of NACA Cowlings for Radial Air-Cooled Engines
"The information on the propeller-cowling-nacelle combinations, presented in Technical Reports nos. 592, 593, and 596 and in Technical Note 620, is applied to the practical design of NACA cowlings. The main emphasis is placed on the method of obtaining the dimensions of the cowling; consequently, the physical functioning of each part of the cowling is treated very briefly. A practical method of designing cowlings and some examples are presented" (p. 383).
Date:
March 5, 1938
Creator:
Stickle, George W.
System:
The UNT Digital Library
Interference of Tail Surfaces and Wing and Fuselage from Tests of 17 Combinations in the N.A.C.A. Variable-Density Tunnel
"An investigation of the interference associated with tail surfaces added to wing-fuselage combinations was included in the interference program in progress in the NACA variable-density tunnel. The results indicate that, in aerodynamically clean combinations, the increment of the high-speed drag can be estimated from section characteristics within useful limits of accuracy. The interference appears mainly as effects on the downwash angle and as losses in the tail effectiveness and varies with the geometry of the combination" (p. 689).
Date:
November 5, 1938
Creator:
Sherman, Albert
System:
The UNT Digital Library
Cooling on the front of an air-cooled engine cylinder in a conventional engine cowling
Measurements were made of the cooling on the fronts of model cylinders in a conventional cowling for cooling in both the ground and the cruising conditions. The mechanisms of front and rear cooling are essentially different. Cooling on the rear baffled part of the cylinders continually increases with increasing fin width. For the front of the cylinder, an optimum fin width was found to exist beyond which an increase in width reduced the heat transfer. The heat transfer coefficient on the front of the cylinders was larger on the side of the cylinder facing the propeller swirl than on the opposite side. This effect became more pronounced as the fin width was increased. These results are introductory to the study of front cooling and show the general effect of several test parameters.
Date:
April 5, 1939
Creator:
Brevoort, M. J. & Joyner, U. T.
System:
The UNT Digital Library
Roberts County, Texas: Records of wells and springs, drillers' logs, water analyses, and map showing location of wells and springs
Data complied regarding wells and other water resources, including water quality analysis, measurements, and other relevant information.
Date:
November 5, 1940
Creator:
United States. Work Projects Administration.
System:
The Portal to Texas History
An Approximate Method of Calculation of Relative Humidity Required to Prevent Frosting on Inside of Aircraft Pressure Cabin Windows, Special Report
This report has been prepare in response to a request for information from an aircraft company. A typical example was selected for the presentation of an approximate method of calculation of the relative humidity required to prevent frosting on the inside of a plastic window in a pressure type cabin on a high speed airplane. The results of the study are reviewed.
Date:
December 5, 1940
Creator:
Jones, Alun R.
System:
The UNT Digital Library
[Business and Legislation Report, Confidential Analysis and Recommendations for Members]
Business and Legislation report from the Research Institute of America containing a confidential analysis and recommendations for its members. The report contains an outline for dealing with inflation and instructions for operation under a new tax law.
Date:
June 5, 1943
Creator:
Cherne, Leo M.
System:
The Portal to Texas History