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Technical Report Archive and Image Library
1,250
National Advisory Committee for Aeronautics Collection
775
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326
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263
Texas State Publications
6
Harris and Eliza Kempner
4
John J. Herrera Papers
2
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2
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2
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1
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NACA Research Memorandums
440
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236
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227
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93
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59
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57
Hanford Works Reports
49
HW (Series)
47
Trace elements investigations report
42
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41
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Results:
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Lignite in Greece
From Summary and Conclusions: "The objective of this investigation has been stated above in the Introduction. Studies were made of mining operations in the Athens Basin, Rafina and Oropos districts; the Kimi and Aliveri areas on the island of Euboea; and the Peloponnese in the vicinity of Kalamai. (See fig. 2). Mining practices at mines in these areas are summarized briefly in this report. Samples of lignite were shipped to Bureau of Mines experiment stations at Pittsburgh, Pa., and Golden, Colo., for washability and utilization studies."
Date:
1951
Creator:
Toenges, Albert L.; Crentz, W. L.; Parks, B. C. & Abernethy, R. F.
System:
The UNT Digital Library
The Bureau of Mines Routine Method for the Analysis of Crude Petroleum (In Three Parts): [Part] 1. The Analytical Method
From Scope of Report: "The present report is part I of a bulletin that describes and interprets the analyses of crude oils. It gives details of the procedure, describes the apparatus, and discuses briefly the ancillary methods used to obtain pertinent information regarding the characteristics of the samples."
Date:
1951
Creator:
Smith, N. A. C.; Smith, H. M.; Blade, O. C. & Garton, E. L.
System:
The UNT Digital Library
Methods of Analyzing Coal and Coke
From Introduction: "The Bureau of Mines has received many requests for information concerning the methods its laboratories use for analyzing coal and coke and determining their heating value."
Date:
1951
Creator:
Fieldner, A. C. & Selvig, W. A.
System:
The UNT Digital Library
Helium-Bearing Natural Gases of the United States: Analyses and Analytical Methods
Report published by the U.S. Bureau of Mines containing the results of a survey of the natural gas resources available in the United States. From the summary:"The Results of a Bureau of Mines survey of helium resources are given in this report and comprise gas analyses and accompanying data on more than 2,100 samples that have been collected in 30 States. The survey to determine the Nation's helium resources has been carried on in all natural-gas-producing areas of the United States since the inception of the Government's helium program in 1917. The primary purpose of the report is to present the results of this work in a tabulated form. A secondary purpose is to make public the historical background of the helium survey and to describe the methods of collecting gas samples and analyzing them. Detailed descriptions are given of the analytical equipment and procedures used in making the analyses" (p. 1).
Date:
1951
Creator:
Anderson, C. C. & Hinson, H. H.
System:
The UNT Digital Library
Aviation Gasoline and its Component Hydrocarbons: Wartime Research (1940-45)
From Scope and Plan: "As the table of contents indicates, the present report summarizes the important data obtained from the research on aviation gasoline during the period 1940-45, exclusive of the data on jet-propulsion fuels. The report is divided into an introduction giving the historical background for the work, two chapters, and an appendix. The first chapter presents the data in a series of 15 tables carefully cross-indexed and supplemented by 19 charts showing the composition of as many straight-run naphthas. The second chapter discusses in general the equipment, procedures, and methods used in the experimental work and is supplemented by illustrations when necessary."
Date:
1951
Creator:
Smith, H. M.; Kraemer, A. J. & Thorne, H. M.
System:
The UNT Digital Library
Lurgi Process: Use for Complete Gasification of Coals with Steam and Oxygen Under Pressure
From Introduction: "The United States Department of the interior, Bureau of Mines, is not only interested in coal gasification for the manufacture of gaseous fuels but also in the raw gas as a possible source of materials for the Synthetic Liquid Fuels program."
Date:
1951
Creator:
Cooperman, J.; Davis, J. D.; Seymour, W. & Ruckes, W. L.
System:
The UNT Digital Library
Fluid Flow Through Packed and Fluidized Systems
From Introduction: "Examination of published correlations revealed that considerable uncertainty existed in the correlation of the operating variables of such equipment with the pressure drops which could be expected through packaged and fluidized systems; correlations proposed in the literature differed from each other frequently by as much as 75 to 100 percent. The following study was begun in 1946 to develop correlations that would be suitable for the design of new equipment in which fluids are brought into contact with granular materials."
Date:
1951
Creator:
Leva, M.; Weintraub, M.; Grummer, M.; Pollchik, M. & Storch, H. H.
System:
The UNT Digital Library
Studies of the Extraction and Coking of Coal and their Significance in Relation to its Structure
From Summary: "This Paper is concerned with two aspects of the behavior of coal: (1) Dispersion by solvents at atmospheric pressure and high temperature and (2) the destruction and regeneration of the coking properties of coal."
Date:
1951
Creator:
Orchin, M.; Golumbic, C.; Anderson, J. E. & Storch, H. H.
System:
The UNT Digital Library
Carbonizing Properties: Chilton Coal from Lorado Number 5 Mine, Lorado, Logan County, West Virginia
From Forward: "The value of this survey of the carbonizing properties of American coals by a standard method lies in the comparability of the results on different coals. A secondary objective of the Bureau of Mines carbonization studies is to obtain information on the chemical and physical properties of different coals that may effect the yield and nature of the gas, coke, and byproducts."
Date:
1951
Creator:
Davis, J. D.; Reynolds, D. A.; Wolfson, D. E.; Naugle, B. W. & Ode, W. H.
System:
The UNT Digital Library
Acid-Mine-Drainage Problems: Anthracite Region of Pennsylvania
Report from the U.S. Bureau of Mines discussing the anthracite region of Pennsylvania and the efforts to prevent coal-mine drainage into nearby streams. According to the introduction, "The purpose of this report is not to develop a practicable or feasible method or process of treating acid mine water but rather to present available factual and deduced data that may be useful in showing pH range over which the treatment is to take place and the sludge products most likely to be handled" (p. 2).
Date:
1951
Creator:
Ash, S. H. (Simon Harry), b. 1889; Felegy, E. W.; Kennedy, D. O. & Miller, P. S.
System:
The UNT Digital Library
United States Earthquakes, 1951
Report discussing earthquake activity in the United States during 1951. The report is broken down by regions and has sections for specific earthquakes.
Date:
1951
Creator:
unknown
System:
The UNT Digital Library
Method for Estimating Lift Interference of Wing-Body Combinations at Supersonic Speeds
Memorandum presenting the use of the modified slender-body method to predict the lift and moment interference of triangular wing-body combinations adapted to combinations with other than triangular wings. The methods are applied to the prediction of the lit-curve slopes of nearly 100 triangular, rectangular, and trapezoidal wing-body configurations.
Date:
December 31, 1951
Creator:
Nielsen, Jack N. & Kaattari, George E.
System:
The UNT Digital Library
NACA Investigations of Icing-Protection Systems for Turbojet-Engine Installations
"Investigations have been made in flight and in wind tunnels to determine which components of turbojet installations are most critical in icing conditions, and to evaluate several methods of icing protection. From these studies, the requirements necessary for adequate icing protection and the consequent penalties on engine performance can be estimated. Because investigations have indicated that the compressor-inlet screen constitutes the greatest icing hazard and is difficult to protect, complete removal or retraction of the screen upon encountering an icing condition is recommended" (p. 1).
Date:
May 2, 1951
Creator:
von Glahn, Uwe; Callaghan, Edmund E. & Gray, Vernon H.
System:
The UNT Digital Library
X-Ray Diffraction Study of the Internal Structure of Supercooled Water
From Summary: "A Bragg X-ray spectrometer equipped with a volume-sensitive Geiger counter and Soller slits and employing filtered molybdenum Ka radiation was used to obtain a set of diffracted intensity curves as a Punction of angle for supercooled water. Diffracted intensity curves in the temperature region of 21 to -16 C were obtained. The minimum between the two main diffraction peaks deepened continuously with lowering temperature, indicating a gradual change in the internal structure of the water. No discontinuity in this trend was noted at the melting point. The internal structure of supercooled water was concluded to become progressively more ice-like as the temperature is lowered."
Date:
October 1951
Creator:
Dorsch, Robert G. & Boyd, Bemrose
System:
The UNT Digital Library
Effectiveness of Thermal-Pneumatic Airfoil-Ice-Protection System
From Summary: "Icing and drag investigations were conducted in the NACA Lewis icing research tunnel employing a combination thermal-pneumatic de-icer mounted on a 42-inch-chord NACA 0018 airfoil. The de-icer consisted of a 3-inch-wide electrically heated strip symmetrically located about the leading edge with inflatable tubes on the upper and lower airfoil surfaces aft of the heated area. The entire de-icer extended to approximately 25 percent of chord. A maximum power density of 9.25 watts per square inch was required for marginal ice protection on the airfoil leading edge at an air temperature of 00 F and an airspeed of 300 miles per hour."
Date:
April 13, 1951
Creator:
Gowan, William H., Jr. & Mulholland, Donald R.
System:
The UNT Digital Library
Calculated Performance of a Direct-Air Nuclear Turbojet-Powered Airplane Using a Split-Flow Reactor and a Separated-Type Shield
Memorandum presenting an analysis made to estimate the performance of a direct-air nuclear turbojet-powered airplane using a split-flow reactor and a separated-type shield. The analysis was for flight Mach numbers of 0.9 and 1.5 and covered a range of altitudes, reactor-wall temperatures, turbine-inlet temperatures, compressor pressure ratios, and airplane lift-drag ratios.
Date:
February 1951
Creator:
Doyle, R. B.
System:
The UNT Digital Library
An Empirical Method Permitting Rapid Determination of the Area, Rate and Distribution of Water-Drop Impingement on an Airfoil of Arbitrary Section at Subsonic Speeds
"An empirical method for the determination of the area, rate, and distribution of water-drop impingement on airfoils of arbitrary section is presented. The procedure represents an initial step toward the development of a method which is generally applicable in the design of thermal ice-prevention equipment for airplane wing and tail surfaces. Results given by the proposed empirical method are expected to be sufficiently accurate for the purpose of heated-wing design, and can be obtained from a few numerical computations once the velocity distribution over the airfoil has been determined" (p. 1).
Date:
September 1951
Creator:
Bergrun, Norman R.
System:
The UNT Digital Library
Flight Instrument for Measurement of Liquid-Water Content in Clouds at Temperatures Above and Below Freezing
"A principle formerly used in an instrument for cloud detection was further investigated to provide a simple and rapid means for measuring the liquid-water content of clouds at temperatures above and below freezing. The instrument consists of a small cylindrical element so operated at high surface temperatures that the impingement of cloud droplets creates a significant drop in the surface temperature. The instrument is sensitive to a wide range of liquid-water content and was calibrated at one set of fixed conditions against rotating multicylinder measurements. The limited conditions of the calibration Included an air temperature of 20 F, an air velocity of 175 miles per hour, and a surface temperature in clear air of 475 F" (p. 1).
Date:
March 6, 1951
Creator:
Perkins, Porter J.
System:
The UNT Digital Library
A Simplified Instrument for Recording and Indicating Frequency and Intensity of Icing Conditions Encountered in Flight
Memorandum presenting an instrument for recording and indicating the frequency and intensity of aircraft icing conditions to obtain statistical icing data over worldwide air routes during routine airline operations. Data of this type is needed to provide pertinent meteorological information necessary for the optimum design of ice-protection systems. The features that make this particular instrument desirable include the simplicity of operation, freedom from maintenance and operating problems, automatic operation upon encountering an icing condition, visual indications of icing intensity available to the pilot, total weight of 18 pounds, and continuous recorded data.
Date:
July 3, 1951
Creator:
Perkins, Porter J.; McCullough, Stuart & Lewis, Ralph D.
System:
The UNT Digital Library
An Instrument Employing a Coronal Discharge for the Determination of Droplet-Size Distribution in Clouds
From Summary: "A flight instrument that uses electric means for measuring the droplet-size distribution in above-freezing clouds has been devised and given preliminary evaluation in flight. An electric charge is placed on the droplets and they are separated aerodynamically according to their mass. Because the charge placed on the droplets is a. function of the droplet size, the size spectrum can 'be determined by measurement of the charge deposited on cylinders of several different sizes placed to intercept the charged droplets. An expression for the rate of charge acquisition by a water droplet in a field of coronal discharge is derived."
Date:
September 1951
Creator:
Brun, Rinaldo J.; Levine, Joseph & Kleinknecht, Kenneth S.
System:
The UNT Digital Library
Adaptation of a Cascade Impactor to Flight Measurement of Droplet Size in Clouds
"A cascade impactor, an instrument for obtaining the size distribution of droplets borne in a low-velocity air stream, was adapted for flight cloud droplet-size studies. The air containing the droplets was slowed down from flight speed by a diffuser to the inlet-air velocity of the impactor" (p. 1).
Date:
September 18, 1951
Creator:
Levine, Joseph & Kleinknecht, Kenneth S.
System:
The UNT Digital Library
Comparison of Heat Transfer from Airfoil in Natural and Simulated Icing Conditions
"An investigation of the heat transfer from an airfoil in clear air and in simulated icing conditions was conducted in the NACA Lewis 6- by 9-foot icing-research tunnel in order to determine the validity of heat-transfer data as obtained in the tunnel. This investigation was made on the same model NACA 65,2-016 airfoil section used in a previous flight study, under similar heating, icing, and operating conditions. The effect of tunnel turbulence, in clear air and in icing was indicated by the forward movement of transition from laminar to turbulent heat transfer" (p. 1).
Date:
September 1951
Creator:
Gelder, Thomas F. & Lewis, James P.
System:
The UNT Digital Library
A General Correlation of Temperature Profiles Downstream of a Heated-Air Jet Directed Perpendicularly to an Air Stream
"An experimental investigation was conducted to determine the temperature profile downstream of a heated-air jet directed perpendicularly to an air stream. The profiles were determined at several positions downstream of the jet as functions of jet density, jet velocity, free-stream density, free-stream velocity, jet temperature, and orifice flow coefficient. A method is presented which yields a good approximation of the temperature profile in terms of dimensionless parameters of the flow and geometric conditions" (p. 1).
Date:
September 1951
Creator:
Callaghan, Edmund E. & Ruggeri, Robert S.
System:
The UNT Digital Library
Theoretical Investigation of Submerged Inlets at Low Speeds
From Summary: "The general characteristics of the flow field in a submerged air inlet are investigated by theoretical, wind-tunnel, and visual-flow studies. Equations are developed for calculating the laminar and turbulent boundary-layer growth along the ramp floor for parallel, divergent, and convergent ramp walls, and a general equation is derived relating the boundary-layer pressure losses to the boundary-layer thickness. It is demonstrated that the growth of the boundary layer on the floor of the divergent-ramp inlet is retarded and that a vortex pair is generated in such an inlet."
Date:
August 1951
Creator:
Sacks, Alvin H. & Spreiter, John R.
System:
The UNT Digital Library