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Serial/Series Title
NACA Research Memorandums
55
Atomic Energy Commission Reports
33
United States Geological Survey Reports
31
National Bureau of Standards Reports
28
Argonne National Laboratory Reports
24
United States Bureau of Mines Reports
22
U.S. Waterways Experiment Station Reports
19
United States Fish and Wildlife Service Reports
16
NBS monograph
13
TID
13
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280 Matching Results
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The Effects of Increasing the Leading-Edge Radius and Adding Forward Camber on the Aerodynamic Characteristics of a Wing With 35 Degrees of Sweepback
Report presenting a wind-tunnel investigation to determine the effects of a section modification on the aerodynamic characteristics of a wing with 35 degrees of sweepback. The wing was modified by increasing the leading-edge radius of the NACA 64A010 section and adding a small amount of camber to the forward portion of the chord. Lift, drag, pitching-moment, and trailing-edge-flap hinge-moment characteristics of the modified wing are compared with results from the original wing.
Date:
February 9, 1951
Creator:
Demele, Fred A. & Sutton, Fred B.
Object Type:
Report
System:
The UNT Digital Library
Characteristics of a Hot Jet Discharged from a Jet-Propulsion Engine
From Summary: "An investigation of a heated jet was conducted in conjunction with tests of an axial-flow jet-propulsion engine in the Cleveland altitude wind tunnel. Pressure and temperature surveys were made across the jet 10 and 15 feet behind the jet-nozzle outlet of the engine. Surveys were obtained at pressure altitudes of 10,000, 20,000, 30,000, and 40,000 feet with test-section velocities from 30 to 110 feet per second and test-section temperatures from 60 F to -50 F. From measurements taken throughout the operable range of engine speeds, tail-pipe outlet temperatures from 500 F to 1250 F and jet velocities from 400 to 2200 feet per second were obtained."
Date:
December 27, 1946
Creator:
Fleming, William A.
Object Type:
Report
System:
The UNT Digital Library
Experiments With a Wing From Which the Boundary Layer Is Removed by Pressure or Suction
With an unsymmetrical wing and a rotating Magnus cylinder, the lift is produced by the superposition of parallel and circulatory flows. An explanation of the circulatory flow is furnished by the boundary-layer theory of Prandtl and the consequent vortex formation. According to this explanation, it must evidently be possible to increase the circulation either by increasing the size of the stronger (lower) vortex or by decreasing the size of the weaker (upper) vortex.
Date:
July 1928
Creator:
Wieland, K.
Object Type:
Report
System:
The UNT Digital Library
Some possibilities of using gas mixtures other than air in aerodynamic research
A study is made of the advantages that can be realized in compressible-flow research by employing a substitute heavy gas in place of air. The present report is based on the idea that by properly mixing a heavy monatomic gas with a suitable heavy polyatomic gas, it is possible to obtain a heavy gas mixture which has the correct ratio of specific heats and which is nontoxic, nonflammable, thermally stable, chemically inert, and comprised of commercially available components. Calculations were made of wind-tunnel characteristics for 63 gas pairs comprising 21 different polyatomic gases properly mixed with each of three monatomic gases (argon, krypton, and zenon).
Date:
1956
Creator:
Chapman, Dean R.
Object Type:
Report
System:
The UNT Digital Library
Effect of Inlet-Air Parameters on Combustion Limit and Flame Length in 8-Inch-Diameter Ram-Jet Combustion Chamber
Report presenting an investigation with a ram-jet combustion chamber to determine the effect of fuel-air ratio and the inlet-air parameters of pressure, temperature, and velocity on combustion limit, combustion efficiency, and flame length.
Date:
July 22, 1948
Creator:
Cervenka, A. J. & Miller, R. C.
Object Type:
Report
System:
The UNT Digital Library
The Status of Meteorological Knowledge as a Factor in Air Pollution Control
The first national Technical Conference on Air Pollution (1) held in this city in 1950 included eight papers on meteorology; the present session contains one. On this basis, one night conclude that recent progress in meteorology has been virtually nonexistent or that the importance of meteorological factors has been diminishing, Neither could be further from the truth, as the number and quality of papers relating to air pollution meteorology in recent scientific and technical sessions will attest. It is particularly appropriate to review the status of meteorological "know-how" at this time, because of the many situations in which the ultimate capability of the atmosphere to absorb pollution is in question. Both in connection with highly toxic materials on the one hand and the "megalopolis" on the other, estimates of the "atmospheric sewer capacity" are becoming increasingly necessary to industrial and municipal planning.
Date:
1968
Creator:
Smith, Maynard E.
Object Type:
Report
System:
The UNT Digital Library
Wind-Tunnel Investigation of Horizontal Tails 1: Unswept and 35 Degrees Swept-Back Plan Forms of Aspect Ratio 3
Memorandum presenting the results of a wind-tunnel investigation of the low-speed characteristics of horizontal tails of aspect ratio 3 with unswept and swept-back plan forms. Two models were tested which had identical areas, aspect ratio, taper ratio, and airfoil section, differing only in the angle of sweepback and elevator area ratios. The major effect of sweepback was to increase the rate of change of hinge-moment coefficient with angle of attack, to reduce the rate of change with elevator deflection, and to reduce the elevator effectiveness.
Date:
April 22, 1948
Creator:
Dods, Jules B., Jr.
Object Type:
Report
System:
The UNT Digital Library
The effects of high-lift devices on the low-speed stability of a tapered 37.5 degree sweptback wing of aspect ratio 3 in straight and rolling flow
Contains results of tunnel tests to determine effects of various combinations of split flaps, slats, and nose slats on the stability characteristics of a tapered 37.5 degree sweptback wing of aspect ratio 3 in straight and rolling flow.
Date:
November 9, 1948
Creator:
Queijo, M. J. & Lichtenstein, Jacob H.
Object Type:
Report
System:
The UNT Digital Library
Hazardous Materials - Redox Plant
The Redox process uses or produces only a very few materials that are hazardous for reasons other than radioactivity. The conditions under which these materials become hazardous were carefully taken into consideration in the development of the process and design of the equipment. A considerable about of information on the hazardous properties of the process materials was obtained so that the pertinent material could be incorporated into the process specifications. Providing the equipment is operating properly and the process is being carried out within specification limits, no hazardous conditions can be created by the process. The purpose of this report is to assemble in a single, readily available document all of the information on the normal concentration limits and safe handling procedures needed to adequately control the use and storage of these materials. This report should be helpful in preparing safety bulletins and provide guidance in case of unusual incidents, malfunctioning of equipment, or contemplated changes in either the process or equipment. It is important to remember that a maximum allowable concentration (MAC) is only a limit on the concentration of a toxic material which cannot be exceeded in the air to which workers are constantly exposed to every working …
Date:
May 22, 1956
Creator:
Underwood, J. W.
Object Type:
Report
System:
The UNT Digital Library
Bibliography of Clays and the Ceramic Arts
A bibliography of information about various clays, kaolins, and the ceramic arts.
Date:
1896
Creator:
Branner, John Casper
Object Type:
Report
System:
The UNT Digital Library
Carbon deposition of 19 fuels in an annular turbojet combustor
Report presenting the effects of fuel properties and change in simulated engine operating conditions on carbon deposition in an annular turbojet combustor. The fuel properties examined included specific gravity, volumetric average boiling temperature, hydrocarbon type, and hydrogen-carbon weight ratio. The fuels included hydrocarbons of the paraffinic, olefinic, and aromatic types as well as fuel mixtures.
Date:
February 3, 1949
Creator:
Wear, Jerrold D. & Jonash, Edmund R.
Object Type:
Report
System:
The UNT Digital Library
Performance investigation of can-type combustor 1: instrumentation, altitude operational limits and combustion efficiency
Report presenting an investigation of the performance of a single can-type combustor designed for a turbojet engine equipped with an 11-stage axial-flow compressor and a single-stage turbine. The investigation was conducted to determine the altitude operational limits of the engine for two fuels, combustion efficiencies at various simulated conditions of altitude and engine speed, combustor-outlet temperature distribution for several altitudes at constant engine speed, and combustor total-pressure drop.
Date:
September 16, 1948
Creator:
Cook, William P. & Zettle, Eugene V.
Object Type:
Report
System:
The UNT Digital Library
A Preliminary Investigation of the Usefulness of Camber in Obtaining Favorable Airfoil-Section Drag Characteristics at Supercritical Speeds
Report presenting an investigation to determine the possibility of delaying at moderate or large lift coefficients the onset of the abrupt supercritical drag rise of an airfoil section by the use of camber. Results indicated that the addition of camber to the NACA 0010 airfoil leads to significant improvements in the drag characteristics at moderately supercritical speeds .
Date:
October 7, 1949
Creator:
Nitzberg, Gerald E.; Crandall, Stewart M. & Polentz, Perry P.
Object Type:
Report
System:
The UNT Digital Library
Study of stress states in gas-turbine disk as determined from measured operating-temperature distributions
Report presenting results of an experimental investigation to determine the temperature distribution in an aircraft-engine gas-turbine disk. Calculated stresses based on the measured temperature distributions are presented. Results regarding stresses in the inner region of the disk and stresses in the rim of the disk are provided.
Date:
July 21, 1948
Creator:
Farmer, J. Elmo; Millenson, M. B. & Manson, S. S.
Object Type:
Report
System:
The UNT Digital Library
Experimental investigation of the drag of 30 degree, 60 degree, and 90 degree cone cylinders at Mach numbers between 1.5 and 8.2
Report presenting the total drag coefficients of 60 degree cone cylinders of fineness ratio 2.07 measured in free flight from Mach numbers of 1.5 to 8.2. Results regarding the smooth 60 degree cone cylinder, rifled models, and discontinuity lines in the shadowgraph pictures are provided.
Date:
April 25, 1952
Creator:
Seiff, Alvin & Sommer, Simon C.
Object Type:
Report
System:
The UNT Digital Library
A Preliminary Investigation of High-Speed Impact the Penetration of Small Spheres Into Thick Copper Targets
Small metal spheres of various densities were fired at high speed into thick targets of copper and lead. In general, it was found that all of the penetrations could be correlated quite well for engineering purposes by a function relating the depth of penetration to the impact momentum per unit volume.
Date:
May 28, 1958
Creator:
Charters, A. C. & Locke, G. S., Jr.
Object Type:
Report
System:
The UNT Digital Library
An Ecological Characterization of Coastal Maine (North and East of Cape Elizabeth): Volume 6. Atlas
The Atlas of a report regarding an ecological characterization of coastal Maine, North and East of Cape Elizabeth.
Date:
October 1980
Creator:
Fefer, Stewart I. & Schettig, Patricia A.
Object Type:
Report
System:
The UNT Digital Library
Status Review of Hawaiian Insular False Killer Whales (Pseudorca crassidens) under the Endangered Species Act
Report on the status of Hawaiian insular false killer whales in relation to the Endangered Species Act and its status evaluation.
Date:
August 2010
Creator:
Oleson, Erin M.; Boggs, Christofer H.; Forney, Karin A.; Hanson, M. Bradley; Kobyashi, Donald R.; Taylor, Barbara L. et al.
Object Type:
Report
System:
The UNT Digital Library
Computers, Health Records, and Citizen Rights
Report issued by the Bureau of Standards over studies on the benefits of computerized record-keeping. Medical records were chosen for the studies, and they also focus on patient privacy and rights. This report includes tables, and illustrations.
Date:
December 1976
Creator:
Westin, Alan F.; Baker, Michael A.; Annas, George J.; Silberberg, Richard; Broder, Jamie; Isbell, Florence et al.
Object Type:
Report
System:
The UNT Digital Library
Medical and Health Physics Quarterly Report: October, November, and December, 1952
Report of progress on the metabolic properties of various materials, biological studies of radiation effects, health chemistry and physics.
Date:
February 18, 1953
Creator:
University of California Radiation Laboratory
Object Type:
Report
System:
The UNT Digital Library
Biological Effects of Thermal Neutrons and the B10 (n,c) Li7 Reaction
Boron-10 has a high thermal neutron capture cross section (3880 barns). Following neutron capture, the subsequent nuclear disintegration produces an alpha particle and a lithium-7 nucleus with the release of an average of 2.34 MeV for the particle irradiation, and in 93% of the reactions there is also the emission of an 0.48 MeV gamma ray: [equation not transcribed]. The kinetic energy is divided between the lithium-7 nucleus and the alpha particle giving the equal and opposite momentums with a range in tissue of about 8-14μ or approximately 1 cell diameter (1). This fact and the reported favorable partition of boron between tumor and the normal brain suggested a possible therapeutic usefulness which has been investigated clinically. The object of our study is to document the biological effects of the B10 (n,α) Li7 reaction on the brain of dogs injected with boron-10 30 minutes prior to irradiation with thermal neutrons. For this, we felt it desirable to estimate a dose for the boron-10 reaction which if exceeded, produces destruction of normal tissue. This dose could then be a reference dose to be utilized as a maximal limit for the irradiation of normal tissue. We have assured that the largest fluence …
Date:
January 13, 1964
Creator:
Archambeau, J. O.; Alcober, V; Calvo, W. & Brenneis, H.
Object Type:
Report
System:
The UNT Digital Library
The Flora of Healthy Dogs: [Part] 1. Bacteria and Fungi of the Nose, Throat, and Lower Intestine
Report documenting the isolation and identification of microorganisms found in the noses, throats, and lower intestines of twenty two dogs. The most frequently observed organisms were E. coli and S. viridans.
Date:
September 1962
Creator:
Clapper, W. E. & Meade, G. H.
Object Type:
Report
System:
The UNT Digital Library
Status of Uranium Exploration in Turkey
Field evaluations made of uranium deposits located in and near southwestern Turkey
Date:
October 1961
Creator:
Kratchman, Jack
Object Type:
Report
System:
The UNT Digital Library
Coastal Cliff Sediments, San Diego Region, Dana Point to the Mexican Border
From Summary: This study documents the temporally episodic cliff and bluff erosion occurs; namely, at San Onofre State Park, Camp Joseph Pendleton Marine Reservation, and Torrey Pines City and State Parks.
Date:
June 1987
Creator:
Inman, D.
Object Type:
Report
System:
The UNT Digital Library