Technical Report Archive & Image Library (TRAIL) - 32,772 Matching Results

Search Results

Tank tests of a 1/8-size powered dynamic model of the Martin PBM-5 seaplane equipped with a single Edo hydro-ski : TED No. NACA AD3110: Report presenting an investigation of the hydrodynamic characteristics of a powered dynamic model of the Martin PBM-5 seaplane equipped with a single Edo hydro-ski. Various hydro-ski positions were investigated. Results regarding aerodynamic and hydrodynamic characteristics, including excess thrust, smooth-water landings, smooth-water take-offs, rough-water take-offs, and spray are provided.
A Miniature Mixer Settler: Unit developed at Knolls Atomic Power Laboratory for extraction and overcomes the disadvantages of the batch countercurrent units currently in use.
A Transistorized GM Survey Instrument: A portable GM survey instrument was designed and developed which consists of a single transistor blocking-oscillator high voltage supply, a dual transistor multivibrator count-rate meter and a standard 30 mg/cm² glass-wall GM tube.
Effect of an Adjustable Supersonic Inlet on the Performance Up to Mach Number 2.0 of a J34 Turbojet Engine: "A J34 turbojet engine was investigated at free-stream Mach numbers of 0.12 and 1.6 to 2.0 to determine the effect of supersonic inlet operation on engine performance. With the exception of ideal jet thrust, the use of generalized engine parameters correlated the engine data satisfactorily when the exit nozzle was choked. Large total-pressure distortions did not affect compressor efficiency" (p. 1).
Effects of a J34 Turbojet Engine on Supersonic Diffuser Performance: Report presenting testing of a translating cone inlet with a variable bypass at Mach numbers 1.6, 1.8, and 2.0 with both a choked exit plug and a J34 turbojet engine. The main difference between the two options was increased inlet subcritical stability with the engine. Results regarding basic diffuser performance, inlet stability, buzz amplitude and frequency, and diffuser-exit profiles are provided.
An experimental investigation of a flat ram-jet engine on a helicopter rotor: Report presenting the propulsive and aerodynamic characteristics of a flat ramjet engine suitable for use on a helicopter rotor and compared with previous tests of an equivalent engine with a circular cross section. The results indicate that the flat engine has higher values of propulsive thrust plus power-off drag than the circular engine. The power-off and drag characteristics indicate that the flat engine has lift-drag ratios about 3 times those obtained with the circular engine.
Flight investigation of the effectiveness of an automatic aileron trim control device for personal airplanes: "A flight investigation to determine the effectiveness of an automatic aileron trim control device installed in a personal airplane to augment the apparent spiral stability has been conducted. The device utilizes a rate-gyro sensing element in order to switch an on-off type of control that operates the ailerons at a fixed rate through control centering springs. An analytical study using phase-plane and analog-computer methods has been carried out to determine a desirable method of operation for the automatic trim control" (p. 505).
Investigation of a continuous normal-shock positioning control on the bypass of a supersonic inlet in combination with the J34 turbojet engine: Report presenting an investigation of a normal-shock positioning control which utilized the bypass of a supersonic inlet to set the required air flow for a J34 turbojet engines to Mach number 2.0 in the supersonic tunnel. Continuous control without oscillations was obtained by use of the pressure signal from the small static probe. Calculated response time generally agreed with measured values.
Static Lateral-Directional Stability Characteristics of Five Contemporary Airplane Models From Wind-Tunnel Tests at High Subsonic and Supersonic Speeds: Memorandum presenting the static lateral-directional stability characteristics of several airplane models recently investigated which cover many of the geometric arrangements of high-speed airplane components of current interest. The results are limited to the most pertinent aerodynamic phenomena contributing to the lateral-directional characteristics of each airplane type. Results for five different models are provided.
Static lateral-directional stability characteristics of five contemporary airplane models from wind-tunnel tests at high subsonic and supersonic speeds: Report presenting the static lateral-directional stability characteristics of several airplane models that cover many of the geometric arrangements of high-speed airplane components of current interest. The results are presented for a subsonic Mach number of 0.9 and for supersonic Mach numbers ranging from 1.2 to 1.9. Five different models are described and tested.
Static Shear Strength of 2117-T4 (A17S-T4) Aluminum-Alloy Rivets at Elevated Temperatures: Report presenting static single shear tests of 3/16-inch-diameter 2117-T4 (A17S-T4) aluminum-alloy rivets at elevated temperatures. The maximum temperature tested was 800 degrees Fahrenheit and the time at temperature prior to testing range from 1/2 hour to 720 hours.
The Adsorption of He3 and He4 on Activated Charcoal: The adsorption on activated charcoal of pure He3 at 2.5 and 3°K, and of pure He4 at 4°K has been measured. The volume of gas necessary to form a monolayer is approximately the same for the two isotopes. It is shown that capillary condensation does not occur in this adsorbent at low saturations. The data have been analyzed by a number of methods with consistent results.
Aerodynamic Characteristics at Mach Numbers of 1.61 and 2.01 of Various Tip Controls on the Wing Panel of a 0.05-Scale Model of a Martin XASM-N-7 (Bullpup) Missile: TED No. NACA AD 3106: "An investigation has been conducted in the Langley 4- by 4-foot supersonic pressure tunnel to determine the control effectiveness and hinge-moment characteristics of the Martin XASM-N-7 (Bullpup) missile. A half-scale wing panel was tested with a tip control having three different hinge-line locations. The tests were made over an angle-of-attack range from -10 to 10 degrees and a control-deflection range of -15 to 3 degrees" (p. 1).
Air, Precipitation, and Surface Contamination at Certain Localities in New Mexico from Operation Teapot, Spring 1955: The following report describes the findings of air samplings taken that followed the Wasp detonation of Operation Teapot.
Airfield Pavement Evaluation: Report Number 8, Ardmore Air Force Base, Ardmore, Oklahoma: Summary: results of flexural strength, CBR, and plate bearing tests, moisture and density determinations, mechanical analysis, and Atterburg limits tests conducted on the pavements, bases, and subgrades of the various landing facilities at this airfield are used in this report to evaluate the load-carrying capacity of the pavements with respect to various landing-gear assemblies and operational-life categories.
Analyses of Ash from United States Coals: Report summarizing analyses done on ash of coal from the United States.
An analysis of the stability and ultimate compressive strength of short sheet-stringer panels with special reference to the influence of the riveted connection between sheet and stringer: A method of strength analysis of short sheet-stringer panels subjected to compression is presented which takes into account the effect that the riveted attachments between the plate and the stiffeners have on the strength of panels. An analysis of experimental data shows that panel strength is highly influenced by rivet pitch, diameter, and location and that the degree of influence for a given riveting depends on the panel configuration and panel material.
Annual Report of the National Advisory Committee for Aeronautics (40th). Administrative Report Including Technical Report Nos. 1158-1209: Report includes the National Advisory Committee for Aeronautics letter of submittal to the President, summaries of the committee's activities and research accomplished, bibliographies, and financial report.
Argonne National Laboratory Annual Report: 1956: Report issued by the Argonne National Laboratory discussing the variety of work done at the laboratory during the year of 1956. This report includes tables, illustrations, and photographs.
Bibliography of Bureau of Mines Health and Safety Publications: January 1947-June 1955: From Introduction: "While the basic purpose of this bulletin is to describe health and safety reports for the period January 1947 through 1955, a selected number of earlier publications that are believed pertinent for reference purposes are included."
Birth and Development of Parícutin Volcano, Mexico: From introduction: In this report the authors have attempted to present a strictly factual account of the birth and development of Paricutin volcano and avoid any interpretive opinions that might break the true narrative of events.
Cloud-droplet ingestion in engine inlets with inlet velocity ratios of 1.0 and 0.7: Report presenting the paths of cloud droplets into two engine inlets for a wide range of meteorological and flight conditions. The amount of water in droplet form ingested by the inlets and the amount and distribution of water impinging on the inlet walls is obtained from droplet-trajectory configurations. Results regarding an inlet with velocity ratio of 1.0 and a ratio of 0.7 are provided.
Coincident Measurement of the Velocities of Fission Fragments from U²³⁵: The following document describes an investigation that was undertaken to determine the velocities of the fragment pairs formed by slow neutron induced binary fission of U²³⁵.
Compressive Crippling of Structural Sections: "A method is presented for calculating crippling stresses of structural sections as a function of material properties and the proportions of the section. The presence of formed or anisotropic material is accounted for by the use of an effective stress-strain curve. The method of analysis applies to many sections for which a procedure for calculating crippling was not previously available" (p. 1).
Contributions to Economic Geology 1955: A report about phosphates found in the Permian Phosphoria formation of the Rocky Mountains. This area constitutes one of the worlds largest reserves of phosphate.
Correlation of Crippling Strength of Plate Structures With Material Properties: "A correlation approach to the crippling-strength analysis of plate structures in new materials and at elevated temperatures is presented. Appropriately defined crippling-strength moduli and correlation procedures are given for predicting the effect of a change in material properties on the strength of a structure. The strength moduli are readily calculated from the effective compressive stress-strain curve for the structural material" (p. 1).
Corrosion Characteristics of Uranium : An Electron Diffraction Study: Abstract: "The initial product formed on relatively oxide-free uranium has been shown by electron diffraction to be the alpha or low temperature form of uranium hydride. Such as oxide-free surface has been prepared by polishing the metal within the electron diffraction unit while maintaining a vacuum of 10^-7 mm Hg. Uranium dioxide lines appear later and grow in intensity. Electron diffraction studies are reported on vacuum annealed metal."
Critical Masses of Mildly Diluted U²³⁵ Systems Derived from Reactivity Contribution Data: Abstract: "Radioactivity contribution data, obtained from U²³⁵ critical assemblies at Pajerito can be used to predict the effects of diluents on critical mass. The radioactivity contribution data versus radius for diluents in a given assembly may be expressed as a single functional relationship between integral absorption and transport cross sections of the diluents. Using this relation, there can be obtained a general expression for the dependence of critical mass upon volume fraction and the effective absorption and transport cross sections of the diluent."
Design Criteria for Axisymmetric and Two-Dimensional Supersonic Inlets and Exits: Report presenting design charts for single- and double-oblique-shock inlets and isentropic axisymmetric and two-dimensional surfaces with theoretically focused Mach lines for Mach numbers up to 4.0. The requirement of internally and externally attached shocks at the cowl lip is also considered.
The Detection of Short Circuits in Thermocouples by a Radio-Frequency Measurement of Inductance: Abstract: "The development of a portable battery-operated instrument capable of detecting a short-circuit four or more inches from the hot junction of a five-foot-long thermocouple is described. The accuracy of measurement is inversely proportional to the length of the thermocouple and is not affected by changes in thermocouple temperature. A signal having a wave length much greater than the electrical length of the thermocouple is used to measure thermocouple inductance. The instrument consists of a radio-frequency ocillator, a bridge, five stages of amplification, and a director. Theoretical considerations are presented in support of a radio-frequency measurement."
The Determination of Thorium in the Presence of Uranium, Titanium and Tungsten: Abstract: "Thorium is separated from uranium, titanium and tungsten by precipitation as fluoride. The precipitate is ignited to oxide, dissolved in nitric acid, evaporated with perchloric acid, neutralized to a pH between 2.0 and 2.5 and titrated with the disodium salt of ethylene-ddiamine tetrascetic acid, using Eriochrome Cyanide as indicator. If less than 30 milligrams of thorium is present, lanthanum is added as a carrier."
Directional Stability of Towed Airplanes: "So far, very careful investigations have been made regarding the flight properties, in particular the static and dynamic stability, of engine-propelled aircraft and of untowed gliders. In contrast, almost no investigations exist regarding the stability of airplanes towed by a towline. Thus, the following report will aim at investigating the directional stability of the towed airplane and, particularly, at determining what parameters of the flight attitude and what configuration properties affect the stability" (p. 1).
Dispersion of the Neutron Emission in U235 Fission: The following report discusses experiments made during 1944 to develop the theory for the neutron intensity fluctuations of a water boiler.
Distribution of Uranium in the Bisbee District, Cochise County, Arizona: Report discussing a reconnaissance study performed in September and October 1954 of the Bisbee district in Cochise County, Arizona. The purpose of the study was to determine the area's suitability for a detailed study of the relation between uranium and hypogene mineral zoning.
Effect of climb technique on jet-transport noise: From Summary: "A theoretical investigation of jet-transport climb technique was made to determine the effect of variations in engine thrust and airspeed on sound-pressure levels heard by a ground observer. Reducing either thrust or climb airspeed results in reduced sound-pressure levels. Reducing thrust decreases the sound power radiated; decreasing climb airspeed permits the initiation of climb sooner and hence results in increasing the source to observer distance."
The Effects of Chemical Impurities on the Quality of Rolled Uranium Rod: Abstract: "The effects of nitrogen, slag, and hydrogen additions on the surface quality of rolled uranium rod were studied. The addition of 400 ppm of nitrogen resulted in severe striations. Slag inclusions elongated during rolling and produced short open seams in the etched surface. The effects of 9 to 10 ppm of hydrogen were obscured by defects in the original costings. These defects were caused by oxide films entrapped in the ingot."
Estimated Critical Masses of Diluted Oralloy: The following report describes a modification of Hensen's simple formula for critical masses of partially moderated oralloy assemblies that has been used for a survey of bare spheres of nonhydrogenous diluted oralloy.
Experimental and calculated temperature and mass histories of vaporizing fuel drops: Report presenting a comparison of experimental and calculated mass and temperature histories of drops vaporizing with a constant velocity relative to the air. The results indicate that the unsteady state or time required for the drop to reach the wet-bulb temperature is an appreciable portion of the total vaporization time. Results regarding the measurement of surface and center temperature of drops, internal circulation in drops, heat transfer from thermocouple to drop, experimental temperature and mass histories, binary mixtures, and burning drops are provided and compared to theoretical results.
Experimental investigation of air-flow uniformity and pressure level on wire cloth for transpiration-cooling applications: Report presenting an investigation of the problem of producing uniform air flow through a calendered or cold-rolled sheet of brazed stainless-steel corduroy wire cloth on 20x250 mesh cloth in regions of low permeability. The effect of exit level was determined at several exit level pressures on three different types of mesh wire cloth. Results regarding airflow uniformity for calendered wire cloth, effect of exit pressure or pressure level on air flow, and permeability and strength of 20x200 mesh wire cloth are provided.
The Extraction of Uranium from Phosphate Solutions: Abstract: "A process for the extraction and depoisoning of uranium in strong phosphoric acid solution with tributyl phostphate (TBP) is described. The formation of a complex between uranyl and phosphate ions necessities the use of a salting agent which is capable of destroying this complex and releasing the uranyl ion into an organic extractable species. Of various salting agents tried, ferric nitrate was the most successful. It not only provides nitrate ion for the formation of uranyl nitrate but also forms a very stable ferric-phosphate complex, thus completely tying up the phosphate ion when added in equi-molar quantities. Stripping of the enriched solvent is accomplished with phosphoric acid."
Final Hazards Summary Report to the Advisory Committee on Reactor Safeguards on a Research Reactor for the Massachusetts Institute of Technology: From summary: Report on the location, final design, and hazards analysis of the Massachusetts Institute of Technology Reactor Facility. It is hoped that the reactor plans described in this report may be approved from the safety standpoint, so that a license and construction permit for the facility may be granted and construction started.
Flammability of Hydrogen-Air-Nitrogen Oxide Mixtures. Final Report: Limit-of-flammability test were conducted on various hydrogen-air-nitric oxide-nitrous oxide mixtures at one atmosphere pressure and at 28 degree C. The data used to define the limits of flammability of the above mixtures are presented in tabular and graphic form and are used to construct a flammable volume in a regular tetrahedron in which the apices are pure H2, air, NO and H2O.
Flood Prevention in Anthracite Mines: Anthracite Region of Pennsylvania, Projects Numbers 4 and 5: From Scope of Reports: "This report covers the following: (a) A brief description of the work proposed under Projects Nos. 4 and 5; (b) the topography, geology and hydrology of the area into which the sections of the proposed tunnel are to be driven; (c) plans, costs, and construction schedules of the projects; and (d) conclusions and recommendations."
Flow studies on drooped-leading-edge delta wings at supersonic speed: Report presenting an investigation to study the flow over delta wings with drooped leading edges. The vapor-screen, pressure-distribution, and ink-flow tests on delta wings with drooped leading edges and at several semiapex angles are provided.
General Geology of Central Cochise County, Arizona: From abstract: This report describes the comprising the western two-thirds of the Pearce quadrangle and the eastern two-thirds of the Benson quadrangle of the Geological Survey's Topographic Atlas of the United States and includes about 1,400 square miles in the west-central part of Cochise County, Arizona.
Geochemical Studies in the Southwestern Wisconsin Zinc-Lead Area: From introduction: This report describes the work done and the results obtained during a study of the distribution of zinc and lead in soils, rocks, and natural waters of the southwestern Wisconsin zinc-lead area.
Geography, Geology, and Water Resources of the National Reactor Testing Station, Idaho: Part 1 Purpose, History, and Scope of Investigations: Central subject is the ground-water geology and hydrology of the National Reactor Testing Station, with special reference to problems of water supply, water use, and waste disposal, and to the relation of these to water supply and use on the Snake River Plain.
Geography, Geology, and Water Resources of the National Reactor Testing Station, Idaho : Part 2, Geography and Geology: Geologic factors in the physical environment of the National Reactor Testing Station control the amount and availability of the water supply, the methods and efficiency of obtaining water, and the behavior of waste materials that are disposed on the ground or beneath the land surface.
Geology of Devils Tower National Monument, Wyoming: From abstract: Devils Tower is a steep-sided mass of igneous rock that rises above the surrounding hills and the valley of the Belle Fourche River in Crook County, Wyo. It is composed of a crystalline rock, classified as phonolite porphyry, that when fresh is gray but which weathers to green or brown. Vertical joints divide the rock mass into polygonal columns that extend from just above the base to the top of the Tower.
Geology of the Christmas Copper Mine, Gila County, Arizona: From introduction: The exploration project at Christmas was carried on cooperatively by the Geological Survey and U. S. Bureau of Mines. Mr. 0. M. Bishop, Engineer for the Bureau of Mines, examined the property and in his report of June 6, 1942 recommended that six holes be drilled from the 800 level of the mine. The Bureau of Mines began drilling in September 1942, and the Survey investigations began a month later. Since any ore bodies discovered below the 800 level would be inaccessible until a deeper level could be developed, the Bureau and Survey decided to explore from higher levels where resulting benefits could be more quickly realized. Drilling from the upper levels was begun early in 1943.

Technical Report Archive & Image Library (TRAIL) - 32,772 Matching Results

Search Results

Add Filters

Applied Filters