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Office of Scientific & Technical Information Technical Reports
224
Congressional Research Service Reports
75
Texas Patents
66
Texas Attorney General Opinions
42
Technical Report Archive and Image Library
41
National Advisory Committee for Aeronautics Collection
27
Government Accountability Office Reports
16
Texas State Publications
11
Texas Register
10
TRAIL Microcard Collection
10
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493 Matching Results
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A flight investigation of the effect of leading-edge camber on the aerodynamic characteristics of a swept-wing airplane
Report presenting flight measurements on a swept-wing jet aircraft to determine the effects of adding forward camber and an increased leading-edge radius on the low-speed stalling characteristics, the high-speed static longitudinal stability, and the airplane drag. The modified leading edge produced values of maximum lift somewhat greater than the slats on a normal airplane, but the stall was unacceptable because of an abrupt roll-off.
Date:
February 18, 1953
Creator:
Anderson, Seth B.; Matteson, Frederick H. & Van Dyke, Rudolph D., Jr.
Object Type:
Report
System:
The UNT Digital Library
Performance of Supersonic Scoop Inlets
A brief summary is made of the performance of a series of variable-geometry type scoop inlets investigated at the Lewis Laboratory on a model of the X-3 airplane fuselage. Data are presented for a range of inlet mass-flow ratios over a Mach number range from 0 to 2 and from 0 degrees to 12 degrees angle of attack. Rounded-lip inlets are found to give satisfactory performance to a Mach number of 1.5. Use of sharp rather than blunt lip configurations is shown to provide considerable gains in available thrust at Mach number 2.0 but penalize take-off performance to the extent that auxiliary air intakes may be required.
Date:
February 18, 1952
Creator:
Weinstein, M. I.
Object Type:
Report
System:
The UNT Digital Library
Effect of vertical position of the wing on the aerodynamic characteristics of three wing-body combinations
Report presenting the results of an experimental investigation of three plane wings in combination with a body, which represented both low- and high-wing arrangements. The three wings had different plan forms: a tapered unswept plan form, a tapered 45 degree sweptback plan form, and a triangular plan form. Results regarding the effect of Reynolds number and effect of vertical position of the wing are provided.
Date:
February 18, 1953
Creator:
Heitmeyer, John C.
Object Type:
Report
System:
The UNT Digital Library
Performance of two air-cooled turbojet engines determined analytically from engine component performance for a range of cooling-air weight flows
Report presenting an analysis of two turbojet engines, including the component performance of the compressors and turbines, in order to determine the effect on engine performance and operation of bleeding the compressor to furnish cooling air for the turbine rotor blades. Results regarding the compressor and turbine performance characteristics and engine performance characteristics are provided.
Date:
February 18, 1954
Creator:
Ziemer, Robert R.; Schafer, Louis J., Jr. & Heaton, Thomas R.
Object Type:
Report
System:
The UNT Digital Library
Ignition-delay determinations of furfuryl alcohol and mixed butyl mercaptans with various white fuming nitric acids using modified open-cup and small-scale rocket engine apparatus
Report presenting ignition-delay determinations of furfuryl alcohol and mixed butyl mercaptans with various white fuming nitric acids were made at several temperatures with a modified open-cup apparatus and a small-scale rocket engine of approximately 30-pounds thrust.
Date:
February 18, 1955
Creator:
Ladanyi, Dezso J.; Miller, Riley O. & Hennings, Glen
Object Type:
Report
System:
The UNT Digital Library
Measured Data Pertaining to Buffeting at Supersonic Speeds of the Douglas D-558-II Research Airplane
Report presenting data obtained from an investigation of the Douglas-D558-II airplane to determine its buffeting characteristics at high lift and supersonic speeds. From Summary: "Buffeting was encountered at normal-force coefficients greater than about 0.7 in the Mach number range from 0.96 to 1.27 but at Mach number of 1.57, a peak normal-force coefficient of 0.80 was attained with no indication of buffeting. The increase in buffet intensity with lift is very gradual at supersonic speed compared with the buffet intensity-lift variation at subsonic Mach numbers."
Date:
February 18, 1954
Creator:
Baker, Thomas F.
Object Type:
Report
System:
The UNT Digital Library
Effects of several geometric variables on internal performance of short convergent-divergent exhaust nozzles
Report presenting an investigation to determine the effects on internal performance of several geometric variables intended to produce a short, high-performance convergent-divergent nozzle. Some of the characteristics investigated included variations in the throat-contour radius, combinations of the shape of the convergent section and throat-contour radius, divergence angle, and shape of the divergent section.
Date:
February 18, 1955
Creator:
Steffen, Fred W.; Krull, H. George & Schmiedlin, Ralph F.
Object Type:
Report
System:
The UNT Digital Library
Preliminary Investigation of a Technique of Producing a Heated Core in a Supersonic Wind-Tunnel Stream
Report presenting an investigation at Mach numbers 1.9 and 3.0 to demonstrate that a central core of air of high stagnation temperature can be produced in the test section of a supersonic wind tunnel. This makes performing wind tunnel testing cheaper and controls for more variables. Results regarding the core studies at Mach number 1.9 and 3.0 and diffuser performance at Mach number 1.9 are provided.
Date:
February 18, 1955
Creator:
Rousso, Morris D. & Beheim, Milton A.
Object Type:
Report
System:
The UNT Digital Library
Preliminary investigation of some internal boundary-layer-control systems on a side inlet at Mach number 2.96
Report presenting an investigation performed at Mach number 2.96 to study the effects of some internal boundary-layer-control systems on the pressure recovery and stability characteristics of a side inlet with half a double-shock external compression surface. Counterbody bleed did not appreciably improve the performance of the inlet, and the maximum pressure recovery obtained was 62 percent. Results regarding the inlet performance with internal bleed and inlet performance with flow injection on external compression surface are provided.
Date:
February 18, 1955
Creator:
Piercy, Thomas G.
Object Type:
Report
System:
The UNT Digital Library
Thrust and drag characteristics of simulated variable-shroud nozzles with hot and cold primary flows at subsonic and supersonic speeds
Report presenting an experimental investigation of a series of fixed-geometry exhaust nozzles which simulated a variable exit, which was conducted in the 8- by 6-foot supersonic wind tunnel at Mach numbers 0, 0.6, 1.5, 1.7, and 2.0. Gross thrust performance of the long-shroud exit configurations was considerably better than the short-shroud. Results regarding flow coefficients, thrust characteristics, flight performance analysis of data, and shroud drag are provided.
Date:
February 18, 1955
Creator:
Beke, Andrew & Simon, Paul C.
Object Type:
Report
System:
The UNT Digital Library
Note on the Scavenge of 6-Inch-Diameter Ram-Jet Exhaust in Mach 3.1, 1- by 1-Foot Supersonic Tunnel
From Summary: "The exhaust of a 6-inch-diameter ram-jet engine mounted in the Lewis 1- by 1-foot, Mach 3.1 supersonic tunnel was scavenged successfully with a 6.6-inch-diameter scoop. Limiting values of exhaust-to-stream static-pressure ratios and scavenge-system total-pressure ratios were determined for complete scavenging of the products of combustion. The scavenge-system operation influenced the engine exhaust-nozzle pressures under conditions of unstable scavenge flow."
Date:
February 18, 1955
Creator:
Burgess, Warren C., Jr. & Baughman, L. Eugene
Object Type:
Report
System:
The UNT Digital Library
A method for rapid selection of design characteristics of 1-, 1 1/2-, and 2-stage turbines with optimum annulus taper
Report presenting a method for the rapid selection of a turbine design within specified aerodynamic limits. Tables are provided with the overall design parameters and velocity-diagram variables of each design. Detailed design information is also included for ranges of blade-speed parameter and exit radius ratio.
Date:
February 18, 1958
Creator:
Yohner, Peggy L. & English, Robert E.
Object Type:
Report
System:
The UNT Digital Library
Effect of Forging Temperature and Heat Treatment on the Performance of Inconel 700 Buckets at 1625 Degrees F in a J33-9 Turbojet Engine
Report presenting an investigation to determine the effects of forging temperatures and solution treatments on the engine performance of Inconel 700 buckets. The buckets were tested in a J33-9 turbojet engine at 1625 degrees F in 20-minute cycles. Testing demonstrated that the buckets are capable of operating for more than 450 hours at rated speed.
Date:
February 18, 1958
Creator:
Gyorgak, C. A.; Springsteen, D. F. & Johnston, J. R.
Object Type:
Report
System:
The UNT Digital Library
Investigation of Reynolds number effect on performance of an eight-stage axial-flow research compressor with long- and medium-chord lengths in the two transonic inlet stages
Report presenting an investigation of the Reynolds number effects on an axial-flow compressor with two of the transonic inlet stages doubled as compared to the original compressor. Results regarding the long-chord-compressor performance, effect of Reynolds number on compressor performance, and a comparison of long- and medium-chord compressor performance are provided.
Date:
February 18, 1958
Creator:
Sievers, Gilbert K.; Geye, Richard P. & Lucas, James G.
Object Type:
Report
System:
The UNT Digital Library
Analytical investigation of multistage-turbine efficiency characteristics in terms of work and speed requirements
From Introduction: "This report presents an analytical investigation of this aerodynamic interdependence in terms of the effect of variations in the turbine specific work output, blade speed, and stage number on turbine efficiency."
Date:
February 18, 1958
Creator:
Stewart, Warner L.
Object Type:
Report
System:
The UNT Digital Library
Experimental behavior of pentaborane-air combustion products during expansion in a convergent-divergent nozzle
Report presenting an evaluation of the postcombustion behavior of boric oxide using pentaborane-air mixtures burned to completion at a combustor pressure of 3 atmospheres expanded through a convergent-divergent nozzle. Results regarding the symmetry of flow in nozzle, behavior of liquid boric oxide in nozzle, abrupt condensation phenomena, effect of abrupt condensation on performance, and effect of oxide films are provided.
Date:
February 18, 1958
Creator:
Branstetter, J. Robert & Setze, Paul C.
Object Type:
Report
System:
The UNT Digital Library
Wind-tunnel research comparing lateral control devices, particularly at high angles of attack 4: floating tip ailerons on rectangular wings
"This report is the fourth of a series on systematic tests conducted which compares lateral control devices with particular reference to their effectiveness at high angles of attack. The present report covers tests with floating tip ailerons on rectangular Clark y wings. Ailerons of two profiles were tested - symmetrical and Clark y, both with adjustable trailing-edge flaps. Each form was tested at three hinge-axis locations, both with and without vertical end plates between the ailerons and the wing proper. The results from these tests are compared with the results from tests on a wing of the same over-all size equipped with average-sized ordinary ailerons" (p. 481).
Date:
February 18, 1932
Creator:
Weick, Fred E. & Harris, Thomas A.
Object Type:
Report
System:
The UNT Digital Library
Wind-tunnel research comparing lateral control devices, particularly at high angles of attack 2: slotted ailerons and frise ailerons
Three model wings, two with typical slotted ailerons and one with typical frise ailerons, have been tested as part of a general investigation on lateral control devices with particular reference to their effectiveness at high angles of attack, in the 7 by 10 foot wind tunnel of the National Advisory Committee for Aeronautics. Force tests, free-autorotation tests, and forced-rotation tests were made which show the effect of the various ailerons on the general performance of the wing, on the lateral controllability, and on the lateral stability, in general, rolling control at 20 degree angle of attack to plain ailerons of the same size. The adverse yawing moments obtained with the slotted and frise ailerons were, in most cases, slightly smaller than those obtained with plain ailerons of the same size and deflection. However, this improvement was small as compared to the improvement obtainable by the use of suitable differential movements with any of the ailerons, including the plain.
Date:
February 18, 1932
Creator:
Weick, Fred E. & Noyes, Richard W.
Object Type:
Report
System:
The UNT Digital Library
A phenomenological relation between stress, strain rate, and temperature for metals at elevated temperatures
Report presenting a phenomenological relation between stress, strain rate, and temperature to account for the behavior of polycrystalline metals above the equicohesive temperature. This is because the behavior of metals at elevated temperatures is constantly becoming a more important problem. The validity of the relation suggested in the equation appears to be accurate for 7075-T6 aluminum alloy.
Date:
February 18, 1957
Creator:
Stowell, Elbridge Z.
Object Type:
Report
System:
The UNT Digital Library
Northern Ireland: The Peace Process
For years, the British and Irish governments sought to facilitate a peaceful settlement to the conflict in Northern Ireland. This report provides a brief overview of the continuing peace talks and efforts in Northern Ireland, including the deal reached in February 2010 between the Democratic Unionist Party (DUP) and Sinn Fein, the political wing of the Irish Republican Army (IRA). The report also discusses the United States' active support of the Northern Ireland peace process, including the future of the International Fund for Ireland (IFI).
Date:
February 18, 2011
Creator:
Archick, Kristin
Object Type:
Report
System:
The UNT Digital Library
The Carbon Cycle: Implications for Climate Change and Congress
Congress is considering several legislative strategies that would reduce U.S. emissions of greenhouse gases—primarily carbon dioxide (CO2)—and/or increase uptake and storage of CO2 from the atmosphere. Both approaches are viewed by many observers as critical to forestalling global climate change caused, in part, by the buildup of greenhouse gases in the atmosphere from human activities.
Date:
February 18, 2009
Creator:
Folger, Peter
Object Type:
Report
System:
The UNT Digital Library
Whales and Sonar: Environmental Exemptions for the Navy's Mid-Frequency Active Sonar Training
This report discusses laws related to the protection of marine mammals when using mid-frequency active sonar including the Marine Mammal Protection Act (MMPA), the Endangered Species Act (ESA), the National Environmental Policy Act (NEPA), and the Coastal Zone Management Act (CZMA). The report discusses each of the laws generally, and then reviews the litigation surrounding the Navy's compliance with these laws in the context of using the sonar for training purposes off California's coast.
Date:
February 18, 2009
Creator:
Alexander, Kristina
Object Type:
Report
System:
The UNT Digital Library
Texas Register, Volume 11, Number 13, Pages 879-924, February 18, 1986
A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date:
February 18, 1986
Creator:
Texas. Secretary of State.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Texas Register, Volume 8, Number 12, Pages 543-580, February 18, 1983
A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date:
February 18, 1983
Creator:
Texas. Secretary of State.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History