Resource Type
Serial/Series Title
NACA Research Memorandums
269
NACA Technical Notes
133
Atomic Energy Commission Reports
113
NACA Technical Reports
54
NACA Technical Memorandums
50
United States Bureau of Mines Reports
48
Hanford Works Reports
33
Report of investigations (United States. Bureau of Mines)
30
HW (Series)
29
United States Geological Survey Reports
27
39 More
States
Year
Month
Language
741 Matching Results
Results open in a new window/tab.
Flutter of a uniform wing with an arbitrarily placed mass according to a differential-equation analysis and a comparison with experiment
Report presenting a method for the calculation of flutter speed of a uniform wing carrying an arbitrarily placed concentrated mass. The method involves the solution of the differential equations of motion of the wing at flutter speed and does not require the assumption of specific normal modes of vibration.
Date:
March 1949
Creator:
Runyan, Harry L. & Watkins, Charles E.
Object Type:
Report
System:
The UNT Digital Library
The influence of blade-width distribution on propeller characteristics
Report presenting combined force and wake survey tests on three-blade model propellers in order to determine the effects of blade-width distribution on constant-speed efficiency characteristics. The most important result is the demonstration that blade-width distribution has a marked influence on the constant-speed efficiency characteristics of propellers.
Date:
March 1949
Creator:
Reid, Elliott G.
Object Type:
Report
System:
The UNT Digital Library
Investigation at low speeds of the effect of aspect ratio and sweep on rolling stability derivatives of untapered wings
Report presenting a wind-tunnel investigation conducted in rolling flow to determine the effects of aspect ratio and sweep on the rolling stability derivatives for a series of untapered wings. The results indicated that when the aspect ratio is held constant, an increase in sweepback angle causes a significant reduction in the damping in roll at low lift coefficients for only the higher aspect ratios tested.
Date:
March 1949
Creator:
Goodman, Alex & Fisher, Lewis R.
Object Type:
Report
System:
The UNT Digital Library
Critical shear stress of infinitely long, simply supported plate with transverse stiffeners
From Summary: "A theoretical solution is given for the critical shear stress of an infinitely long, simply supported, flat plate with identical, equally spaced, transverse stiffeners of zero torsional stiffness. Results are obtained by means of the Lagrangian multiplier method and are presented in the form of design charts. Experimental results are included and are found to be in good agreement with the theoretical results."
Date:
April 1949
Creator:
Stein, Manuel & Fralich, Robert W.
Object Type:
Report
System:
The UNT Digital Library
Reinforced Circular Cutouts in Plane Sheets
Note presenting an attempt to design the reinforcement of a cutout in a plane sheet in such a way that it is as nearly as possible equivalent to the part of the structure which has been cut out. A perfect equivalence would mean that the stresses and displacements of the structure remain the same as those which would have appeared without the cutout.
Date:
April 1949
Creator:
Reissner, H. & Morduchow, M.
Object Type:
Report
System:
The UNT Digital Library
Effect of Increase in Afterbody Length on the Hydrodynamic Qualities of a Flying-Boat Hull of High Length-Beam Ratio
Report presenting an investigation to determine the effects of increased afterbody length on the hydrodynamic qualities of a model of a flying boat with a hull with a length-beam ratio of 15. Results regarding longitudinal stability, spray characteristics, excess thrust for take-off, landings in waves, and a summary chart are provided.
Date:
April 1949
Creator:
Kapryan, Walter J. & Clement, Eugene P.
Object Type:
Report
System:
The UNT Digital Library
The Response of Pressure Measuring Systems to Oscillating Pressures
Note presenting a method for calculating the response and lag in pressure measuring systems subjected to steady-state sinusoidally varying pressures. The pressure system is assumed to consist of an inlet restriction, tubing length, and connected instrument volume. Results of the phase-shift determination are provided.
Date:
February 1949
Creator:
Taback, Israel
Object Type:
Report
System:
The UNT Digital Library
Strength analysis of stiffened thick beam webs
Report presenting a method for the strength analysis of stiffened beam webs as applied to beams with ratios of applied shear to buckling shear less than 2.5. Results regarding critical shear stress, forced crippling failure in uprights, and web failures are provided.
Date:
March 1949
Creator:
Levin, L. Ross & Sandlin, Charles W., Jr.
Object Type:
Report
System:
The UNT Digital Library
Ambient Pressure Determination at High Altitudes by Use of Free-Molecule Theory
"Several methods (references 1 and 2) based on gas-dynamic principles are available for reducing such measurements. The results obtained by these methods are subject to the limitation of the gas-dynamic theory which is that the mean free path of the molecules between impacts, is small with respect to the measuring device. Inasmuch as no information on the subject is to present known to be available, the purpose of the present paper is to present a method based on the concept of free-molecule theory for use in connection with this problem" (p. 1).
Date:
March 1949
Creator:
Wiener, Bernard
Object Type:
Report
System:
The UNT Digital Library
Dynamometer-stand investigation of a group of mufflers
Report presenting an experimental investigation of a series of exhaust mufflers installed on a typical six-cylinder light-airplane engine mounted on a ground dynamometer sound. Several conclusions regarding muffler design are drawn from this testing. Since engine and propeller noise are about equal for this power-plant installation, both engine-exhaust and propeller noises must be reduced to obtain a sizable reduction in overall sound-pressure level.
Date:
March 1949
Creator:
Davis, Don D., Jr. & Czarnecki, K. R.
Object Type:
Report
System:
The UNT Digital Library
Lectures on Nuclear Science and Engineering, November 16, 1948 to February 1, 1949
Technical report including multiple lectures on nuclear science and engineering, planned to survey the theories, designs, operations, and experimental facilities of the Brookhaven Nuclear Reactor.
Date:
1949
Creator:
Brookhaven National Laboratory
Object Type:
Report
System:
The UNT Digital Library
Thermal Conductivity of Graphite
Technical report outlining the differences in conductivity of AGOT graphite and AGHT graphite.
Date:
November 28, 1949
Creator:
Garth, R. C. & Sailor, V. L.
Object Type:
Report
System:
The UNT Digital Library
Uranium Possibilities in Arizona Exclusive of the Colorado Plateau
From introduction: This report represents an effort to assemble, relate, and evaluate available information about possible primary uranium mineralization in the state of Arizona. This is the initial step in preparation for a system ratio field study of the state.
Date:
December 1949
Creator:
Wright, Robert J.
Object Type:
Report
System:
The UNT Digital Library
Refrigeration System Used in Mercury Isotope Collections
From introduction: During 1948, the Isotope Research and Production Division undertook to obtain small quantities of nearly pure mercury isotopes by electromagnetic isotope separation. The possible use of a mercury isotope of even-numbered mass to establish an international standard of length required an isotopic purity greater than 99 per cent. It, became apparent that this degree of separation could only be achieved by preventing random diffusion of un-ionized mercury which otherwise would contaminate the isotope collectors.
Date:
December 19, 1949
Creator:
Duncan, F. R. & Cobb, W. G.
Object Type:
Report
System:
The UNT Digital Library
Magnets and Magnetic Measuring Techniques
Preface: The existence of adequate experimental equipment, in particular the two operating cyclotrons of the Radiation Laboratory and the large 184-inch unit under construction, together with a nucleus of trained personnel, made it inevitable that work in connection with the war effort would be prosecuted vigorously at the University of California.
Date:
June 1949
Creator:
Wakerling, R. K. & Guthrie, Andrew
Object Type:
Report
System:
The UNT Digital Library
Electrical Circuits for Calutrons
Preface: The existence of adequate experimental equipment, in particular the two operating cyclotrons of the Radiation Laboratory and the large 184-inch unit under construction, together with a nucleus of trained personnel, made it inevitable that work in connection with the war effort would be prosecuted vigorously at the University of California.
Date:
June 1949
Creator:
Wakerling, R. K. & Guthrie, Andrew
Object Type:
Report
System:
The UNT Digital Library
Correlation of Soil Properties with Geologic Information: Report Number 1, Simplification of the Liquid Limit Test Procedure
Introduction: The general project of correlating soil properties with geologic information, one phase of which is described in this report, consists in comparing soil properties with soil types and with their geologic history and environment in order to determine what correlations are possible.
Date:
June 1949
Creator:
Waterways Experiment Station (U.S.)
Object Type:
Report
System:
The UNT Digital Library
Supplemental Technical Report on an Improved Process for the Manufacture of High Purity Calcium, Period Covered November 10, 1948 to January 31, 1949
Abstract. Experimental work was carried out to improve material conversion efficiency and to reduce handling costs inherent in the present process for production of high purity calcium. Charges up to 54 pounds were handled successfully in the equipment available. Material losses were reduced and more complete removal of alkali and alkaline earth metals was effected by controlled pressures of inert gas and by melting under positive pressure of Argon.
Date:
January 31, 1949
Creator:
Brown, H. & Woodberry, P.
Object Type:
Report
System:
The UNT Digital Library
Decomposition of Water at High Temperatures and Pressures Under Reactor Irradiation
Partial abstract: "The investigation of the high temperature and pressure dissociation of water under irradiation was undertaken by the Power Pile Division of Oak Ridge National Laboratory in an effort to determine the degree of importance of the phenomenon with respect to the design of a high temperature water-cooled power reactor. Theory and past experimentation indicate that net steady-state dissociation is determined by the rates of the dissociation and recombination reactions under the imposed conditions, the dissociation rate being essentially a function of flux and the recombination rate essentially a function of temperature" (p. 3).
Date:
September 16, 1949
Creator:
Fromm, L. W.
Object Type:
Report
System:
The UNT Digital Library
Fast Neutron Irradiation Procedure
This report discusses a series of investigations for biological and biochemical study of chronic exposures of animals to neutrons through an irradiation procedure.
Date:
1949
Creator:
McDonald, Ellice, 1876-
Object Type:
Report
System:
The UNT Digital Library
The Spectrochemical Analysis of Hafnium and Zirconium
Abstract: "The analysis of hafnium and zirconium by the copper spark technique is presented for solutions of HCl, HF, and HClO4 acids. The special techniques of electrode protection and vacuum drying of perchloric acid samples are outlined. Also given are the working curves and deviations of both elements."
Date:
March 16, 1949
Creator:
Conway, John G. & Moore, Milton F.
Object Type:
Report
System:
The UNT Digital Library
The Preparation and Properties of Uranium Trifluoride
From abstract: "The means of preparing uranium trifluoride are discussed. The most practical method is the reduction of uranium tetrafluoride with uranium although reduction with hydrogen or atomic hydrogen may also be feasible...A literature survey and discussion of other means of preparation are given."
Date:
1949
Creator:
Warf, James C.
Object Type:
Report
System:
The UNT Digital Library
Remote Control for Continuous Liquid Extractors
Abstract: An electronic device has been developed for indication at a distance and simultaneous automatic correction of changes in density, temperature, and interface level of polyphase solutions.
Date:
1949
Creator:
Schenck, Remsen T.
Object Type:
Report
System:
The UNT Digital Library
Direct calorimetric study of fission product decay in active slugs
Report describing the radioactive energy output of U slugs from the Clinton pile. Outputs were measured in a calorimeter. Results have been calculated to watts per gram and compared with previous reports.
Date:
1949
Creator:
Day, R. A. & Cannon, C. V.
Object Type:
Report
System:
The UNT Digital Library