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Preliminary Memorandum, East Slope Area, Marysvale, Utah

Description: From introduction: Preliminary field data have been assembled as a background for laboratory investigations directed toward interpretation of alteration features in the East Slope area. Such data constitute one of several units which should improve our understanding of the pattern of uranium distribution.
Date: November 1951
Creator: Green, Jack & Kerr, Paul F.
Partner: UNT Libraries Government Documents Department

Preliminary Memorandum on the Trinity Mines, Marysvale, Utah

Description: This report provides results from a preliminary study to determine rock types and alteration products that are responsible for an observed abundance of radioactive gas at the Trinity Gold Mine in Utah. It includes an overview of the study and the location, description of the methods and general statements, details about the structure, petrography and mineralogy, and a discussion of findings.
Date: September 1978
Creator: Green, Jack & Kerr, Paul F.
Partner: UNT Libraries Government Documents Department

Preliminary Model Tests of a Wing-Duct Cooling System for Radial Engines, Special Report

Description: Wind-tunnel tests were conducted on a model wing-nacelle combination to determine the practicability of cooling radial engines by forcing the cooling air into wing-duct entrances located in the propeller slipstream, passing the air through the engine baffles from rear to front, and ejecting the air through an annular slot near the front of the nacelle. The tests, which were of a preliminary nature, were made on a 5-foot-chord wing and a 20-inch-diameter nacelle. A 3-blade, 4-foot-diameter propeller was used. The tests indicated that this method of cooling and cowling radial engines is entirely practicable providing the wing of the prospective airplane is sufficiently thick to accommodate efficient entrance ducts , The drag of the cowlings tested was definitely less than for the conventional N.A.C.A. cowling, and the pressure available at low air speed corresponding to operation on the ground and at low flying speeds was apparently sufficient for cooling most present-day radial engines.
Date: February 1, 1939
Creator: Biermann, David & Valentine, E. Floyd
Partner: UNT Libraries Government Documents Department

A preliminary motion-picture study of combustion in a compression-ignition engine

Description: Motion pictures were taken at 1,850 frames per second of the spray penetration and combustion occurring in the N.A.C.A. combustion apparatus arranged to operate as a compression-ignition engine. Indicator cards were taken simultaneously with the motion pictures by means of the N.A.C.A. optical indicator. The motion pictures showed that when ignition occurred during injection it started in the spray envelope. If ignition occurred after injection cut-off, however, and after considerable mixing had taken place, it was impossible to predict where the ignition would start. The pictures also showed that ignition usually started at several points in the combustion chamber. With this apparatus, as the injection advance angle increased from 0 degrees to 40 degrees before top center, the rate of flame spread increased and the duration of the burning decreased.
Date: April 1, 1934
Creator: Buckley, E. C. & Waldron, C. D.
Partner: UNT Libraries Government Documents Department

Preliminary Note on a Correlation of a Boundary-Layer Transition Results on Highly Cooled Blunt Bodies

Description: Transition data on highly cooled blunt bodies are correlated in terms of the ratio of wall to local-stream enthalpy, Reynolds number based on displacement thickness, and location of transition. The proposed correlation, although not sensitive enough to predict the exact location of transition does predict the enthalpy ratio below which very early transition on blunt bodies is expected. The correlation is not altered by moderate amounts of surface roughness; however, the location of transition may well be affected by roughness.
Date: October 14, 1957
Creator: Wisniewski, Richard J.
Partner: UNT Libraries Government Documents Department

Preliminary Notes on the 1951-52 Investigations of the Thomas Range Fluorite District, Juab County, Utah

Description: From page 3: Uraniferous fluorspar pipes cut Paleozoic dolomite in the western part of the Thomas Range, along a ridge known locally as "Spor's Mountain". The fluorspar district (fig. 1) is approximately 50 miles northwest of Delta, Utah, and is in Tps. 12, 13 N., R. 12 W., Salt Lake principal meridian. From July to September 1952 approximately 10 man-months were spent in the district. During this time, field work started in 1951 was completed. Mapping and sampling the fluorspar deposits was done in 1950 (reported in TEI-136). The entire uraniferous fluorspar district has now been mapped at a scale of 1 inch to 1, 000 feet, the complete stratigraphic section of the district has been measured in detail, and additional mine mapping and sampling has been done.
Date: 1950
Creator: Osterwald, Frank W.
Partner: UNT Libraries Government Documents Department

Preliminary Performance Data on General Electric Integrated Electronic Control Operating on J47 RX1-3 Turbojet Engine in NACA Altitude Wind Tunnel

Description: Performance data obtained with recording oscillographs are presented to show the transient response of the General Electric Integrated Electronic Control operating on the J47 RXl-3 turbo-Jet engine over a range of altitudes from 10,000 to 45,000 feet and at ram pressure ratios of 1.03 and 1.4. These data represent the performance of the final control configuration developed after an investigation of the engine transient behavior in the NACA altitude wind tunnel. Oscillograph traces of controlled accelerations (throttle bursts),oontrolled decelerations (throttle chops), and controlled altitude starts are presented.
Date: January 1, 1950
Creator: Blivas, Darnold & Taylor, Burt L., III
Partner: UNT Libraries Government Documents Department

Preliminary Performance Data on Westinghouse Electronic Power Regulator Operating on J34-WE-32 Turbojet Engine in Altitude Wind Tunnel

Description: The behavior of the Westinghouse electronic power regulator operating on a J34-WE-32 turbojet engine was investigated in the NACA Lewis altitude wind tunnel at the request of the Bureau of Aeronautics, Department of the Navy. The object of the program was to determine the, steady-state stability and transient characteristics of the engine under control at various altitudes and ram pressure ratios, without afterburning. Recordings of the response of the following parameters to step changes in power lever position throughout the available operating range of the engine were obtained; ram pressure ratio, compressor-discharge pressure, exhaust-nozzle area, engine speed, turbine-outlet temperature, fuel-valve position, jet thrust, air flow, turbine-discharge pressure, fuel flow, throttle position, and boost-pump pressure. Representative preliminary data showing the actual time response of these variables are presented. These data are presented in the form of reproductions of oscillographic traces.
Date: October 11, 1950
Creator: Ketchum, James R.; Blivas, Darnold & Pack, George J.
Partner: UNT Libraries Government Documents Department

Preliminary photomicrographic studies of fuel sprays

Description: Photomicrographs were taken of fuel sprays injected into air at various densities for the purpose of studying the spray structure and the stages in the atomization of the fuel. The photomicrographs were taken at magnifying powers of 2.5, 3.25, and 10, using a spark discharge of very short duration for illumination. The results indicate that the theory advanced by Dr. R. A. Castleman, Jr., on the atomization of fuel in carburetors may also be applied to the atomization of fuel sprays of the solid-injection type. The fuel leaves the nozzle as a solid column, is ruffled and then torn into small, irregular ligaments by the action of the air. These ligaments are then quickly broken up into drops by the surface tension of the fuel. The photomicrographs also show that the dispersion of a fuel spray at a given distance from the nozzle increases with an increase in the jet velocity or an increase in the air density. The first portions of fuel sprays injected from an automatic injection valve into air at atmospheric density have a much greater dispersion than the later portions, but this difference decreases rapidly as the air density is increased.
Date: July 1, 1932
Creator: Lee, Dana W & Spencer, Robert C
Partner: UNT Libraries Government Documents Department

Preliminary Plan for Treating Mixed Waste

Description: A preliminary waste treatment plan was developed for disposing of radioactive inorganic liquid wastes that contain hazardous metals and/or hazardous acid concentrations at Argonne National Laboratory. This plan, which involves neutralization and sulfide precipitation followed by filtration, reduces the concentration of hazardous metals and the acidity so that the filtrate liquid is simply a low-level radioactive waste that can be fed to a low-level waste evaporator.
Date: June 1993
Creator: Vandegrift, G. F.; Conner, C.; Hutter, Joseph C.; Leonard, R. A.; Nuñez, Luis; Sedlet, J. et al.
Partner: UNT Libraries Government Documents Department

Preliminary Plasma Spectrometric Analyses for Selected Elements in some Geothermal Waters from Cerro Prieto, Mexico

Description: Abstract: As part of a cooperative study with the Geologic Division of the U.S. Geological Survey, water samples collected from geothermal power production wells at Cerro Prieto, Mexico, were analyzed for selected elements by d.c. argon plasma emission spectroscopy. Spectral interferences due to the presence of high concentrations of Ca, Si, Na, and K in these waters affected the apparent concentration values obtained. These effects were evaluated and correction techniques were developed and applied to the analytical values. Precipitates present in the samples at the time of analysis adversely affected the accuracy, precision and interpretability of the data.
Date: 1983
Creator: Ball, James W.
Partner: UNT Libraries Government Documents Department

Preliminary Reconnaissance for Uranium in the Green River Basin and the Rock Springs Uplift, Sweetwater and Fremont Counties, Wyoming

Description: Abstract: Preliminary reconnaissance for uranium in the Green River Basin and the Rock Springs Uplift revealed anomalous radioactivity northwest of Oregon Buttes in the Tipton tongue of the Green River formation and in the Cathedral Bluffs tongue of the Wasatch formation, and in the Tipton tongue in Red Creek Basin.
Date: March 25, 1954
Creator: Winterhalder, E. C.
Partner: UNT Libraries Government Documents Department