Serial/Series Title
NACA Research Memorandums
33
NACA Technical Notes
20
Atomic Energy Commission Reports
7
NACA Technical Reports
6
United States Geological Survey Reports
6
United States Bureau of Mines Reports
5
HW (Series)
3
Hanford Works Reports
3
Oak Ridge National Laboratory Reports
3
Report of investigations (United States. Bureau of Mines)
3
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Investigation of Manganese Deposits in the Philipsburg Mining District, Granite County, Montana
Report issued by the U.S. Bureau of Mines on the manganese deposits near Granite County, Montana. It reviews the mining history and geology of the Philipsburg district. The report includes maps and tables.
Date:
October 1950
Creator:
Lorain, S. H.
System:
The UNT Digital Library
Estimate of Known Recoverable Reserves of Coking Coal in Cambria County, Pennsylvania
Report issued by the U.S. Bureau of Mines on estimates of known deposits of coking coal in Cambria County, Pennsylvania. Studies on the properties of coal and coal blends from the area are presented. The report includes maps and tables.
Date:
October 1950
Creator:
Dowd, James J.; Turnbull, Louis A.; Toenges, Albert L.; Cooper, H. M.; Abernethy, R. F.; Reynolds, D. A. et al.
System:
The UNT Digital Library
Some Innovations in Equipment For Scaling High Roofs and Mine Walls
Report issued by the U.S. Bureau of Mines describing the methods and equipment developed at the oil-shale mine near Rifle, Colorado. This report includes photographs and illustrations documenting this equipment.
Date:
October 1950
Creator:
Brown, Brinton C.; Wright, Fred D. & Ballinger, Homer J.
System:
The UNT Digital Library
Zirconium Research and Development : Progress Report
From introduction: "This is the ninth monthly report, BMI-514, under Contract No. AT(30-1)-771 on "Zirconium Research and Development". The report covers the work period from September 15, 1950, to October 15, 1950. Work is continuing on the preparation of large-diameter zirconium crystal bars in the 16-inch-diameter de Boer unit. Crystal bars up to 1-5/16 inches in diameter and 8 feet long have been prepared in this unit."
Date:
October 15, 1950
Creator:
Bulkowski, H. H.; Sebenick, J. J.; Campbell, Ivor E. & Gonser, B. W.
System:
The UNT Digital Library
Pitchblende Deposits at the Wood and Calhoun Mines, Central City Mining District, Gilpin County, Colorado
From introduction: The purpose of this work was to determine the distribution and reserves of pitchblende in the veins. These particular mines were selected because the other mines that had produced pitchblende in the east were either inaccessible, or accessible under such adverse conditions as to make detailed mapping impracticable.
Date:
October 1950
Creator:
Moore, Frank B. & Butler, C. R.
System:
The UNT Digital Library
Electrodeposition of Aluminum and Zirconium on Uranium
Technical report outlining a method for the electrodeposition of adherent deposits of both aluminum and zirconium on uranium. Report finds that current efficiencies are good for aluminum deposition but low for the zirconium baths. [From Abstract]
Date:
October 12, 1950
Creator:
Lietzke, M. H.
System:
The UNT Digital Library
The Preparation and Properties of Mammalian Ribonucleic Acids
"A method for the preparation of mammalian ribonucleic acids employing high concentrations of guanidine hydrochloride in the fractionation procedure is reported in this paper. Aside from the facility of preparation the method has the advantage of avoiding conditions of acidity and alkalinity which might degrade tissue ribonucleic acids and, by virtue of the protein denaturant action of guanidine salts, of minimizing the possibility for enzymatic degradation" (p. 3).
Date:
October 12, 1950
Creator:
Volkin, E. & Carter, C. E.
System:
The UNT Digital Library
Pressure Distribution and Damping in Steady Pitch at Supersonic Mach Numbers of Flat Swept-Back Wings Having All Edges Subsonic
Note presenting a method for calculating the pressure distribution and damping in steady pitch at supersonic Mach numbers of thin, flat, sweptback wings with all edges straight and subsonic. The two steps of the method are described and applied to wings with streamwise tips. The analysis showed that abrupt changes in pressure should occur along the various primary and reflected Mach lines on the wing, especially those originating at the tips of the leading edge.
Date:
October 1950
Creator:
Walker, Harold J. & Ballantyne, Mary B.
System:
The UNT Digital Library
Sintering mechanism between zirconium carbide and columbium
Report presenting an investigation of the sintering process and sintering mechanism of a zirconium carbide-columbium ceramal. Results regarding the study of the bonding specimen and study of the sintering specimens are provided.
Date:
October 1950
Creator:
Hamjian, H. J. & Lidman, William G.
System:
The UNT Digital Library
Wind-Tunnel Investigation at Low Speed of the Lateral Control Characteristics of an Unswept Untapered Semi-Span Wing of Aspect Ratio 3.13 Equipped With Various 25-Percent-Chord Plain Ailerons
Report presenting a wind-tunnel investigation at low speed to determine the lateral control characteristics of an unswept untapered semispan wing of aspect ratio 3.13 equipped with 25-percent-chord plain unsealed ailerons with various spans and spanwise locations. Results regarding wing aerodynamic characteristics and aileron control characteristics are provided.
Date:
October 1950
Creator:
Johnson, Harold S. & Hagerman, John R.
System:
The UNT Digital Library
Measurement of the moments of inertia of an airplane by a simplified method
Report presenting a simplified method for the experimental determination of the moments of inertia, product of inertia, and inclination of the principal axes, the associated equipment and techniques, and the application of this method to a conventional airplane.
Date:
October 1950
Creator:
Turner, Howard L.
System:
The UNT Digital Library
Effect of heat and power extraction on turbojet-engine performance 3: analytical determination of effects of shaft-power extraction
Report presenting an analysis of the performance of an axial-flow-type turbojet engine operating with shaft-power extraction by matching experimentally determined component characteristics of a typical axial-flow engine. General working charts are provided to investigate engine performance with variable and rated tail-pipe-nozzle area operation at constant turbine-inlet temperature, engine speed, and thrust.
Date:
October 1950
Creator:
Koutz, Stanley L.; Hensley, Reece V. & Rom, Frank E.
System:
The UNT Digital Library
Boundary-layer measurements in 3.84- by 10-inch supersonic channel
Report presenting boundary-layer measurements in the transonic and supersonic regions of a channel with maximum cross-sectional dimensions 3.84 by 10 inches and designed by potential-flow methods for a uniform Mach number of 2.08. Results regarding the Mach number distribution along the channel, temperature recovery and Prandtl number, boundary layer development, skin-friction coefficient, and secondary flows are provided.
Date:
October 1950
Creator:
Brinich, Paul F.
System:
The UNT Digital Library
Gust-tunnel investigation of a wing model with semichord line swept back 60 degrees
Report presenting an investigation in the gust tunnel of a 60 degree sweptback-wing model to determine the effect of a large angle of sweep on gust loads. A simplified method of analysis, which uses a slope of the lift curve derived by the cosine law and which uses strip theory to estimate the penetration effect, appears to be applicable to the prediction of gust loads on wings swept as much as 60 degrees.
Date:
October 1950
Creator:
Pierce, Harold B.
System:
The UNT Digital Library
Theoretical supersonic characteristics of inboard trailing-edge flaps having arbitrary sweep and taper: Mach lines behind flap leading and trailing edges
Report presenting generalized expressions for closed form by means of linearized theory for the aerodynamic characteristics due to the deflection of inboard trailing-edge flaps. The analysis considers the effects of Mach number and flap aspect ratio, taper ratio, and sweep for conditions where Mach lines lie behind the flap leading and trailing edges. Design charts are presented for rapid estimation of the aerodynamic characteristics due to flap deflection.
Date:
October 1950
Creator:
Kainer, Julian H. & Marte, Jack E.
System:
The UNT Digital Library
Analysis of shear strength of honeycomb cores for sandwich constructions
From Introduction: "In the present report an analysis was undertaken to arrive at a mathematical formula by which the shear strengths of honeycomb core materials could be calculated. Experimental verification of the formula of the present paper was obtained by tests of honeycomb-type sheets of resin-impregated paper; two groups of specimens were tested, each of which represented a different resin-impregation treatment of the basic paper."
Date:
October 1950
Creator:
Werren, Fred & Norris, Charles Brazer
System:
The UNT Digital Library
Free Oscillations of an Atmosphere in Which Temperature Increases Linearly With Height
Note presenting the concept that when the temperature in the atmosphere increases linearly with height, the speed of propagation of long waves does not approach a limit with increasing wave length, as in the case of an atmosphere in which the temperature at great heights is assumed to be constant or decreasing, but increases linearly with the period.
Date:
October 1950
Creator:
Pekeris, C. L.
System:
The UNT Digital Library
Impact-Pressure Interpretation in a Rarefied Gas at Supersonic Speeds
Note presenting a summary of the interpretation of measured impact pressures in a rarefied gas. Experimental results are presented for source-shaped impact tubes for Mach numbers between 2.3 and 3.6 and Reynolds numbers from 25 to 804.
Date:
October 1950
Creator:
Kane, E. D. & Maslach, G. J.
System:
The UNT Digital Library
An approximate method of calculating pressures in the tip region of a rectangular wing of circular-arc section at supersonic speeds
From Introduction: "The present paper introduces the approximate method by means of which it is possible to calculate the pressures in the tip region of a rectangular with a symmetrical circular-arc section to a higher degree of accuracy than is possible with the usual linear methods."
Date:
October 1950
Creator:
Czarnecki, K. R. & Mueller, James N.
System:
The UNT Digital Library
Aerodynamic coefficients for an oscillating airfoil with hinged flap, with tables for a Mach number of 0.7
From Introduction: "The fundamental integral equation for the pressure distribution on an oscillating thin airfoil moving at subsonic speed has been derived by Possio in reference 1. Collocation procedures have been used by Possio, Frazer, and Skan, and others to obtain lift and moment on an oscillating first plate. An important contribution has been made by Dietze (see reference 2 and 3), who has developed an iterative procedure for numerical solution of Possio's integral equation."
Date:
October 1950
Creator:
Turner, M. J. & Rabinowitz, S.
System:
The UNT Digital Library
Theory of helicopter damping in pitch or roll and a comparison with flight measurements
Report presenting calculations and flight-test measurements on a single-main-rotor helicopter indicate that the damping moment about the helicopter center of gravity produced during pitching or rolling by a rotor which has flapping hinges on the rotor shaft, which depends primarily on four quantities: rotor speed, blade mass factor, height of the rotor hub above the helicopter center of gravity, and the ratio of collective pitch to the thrust coefficient - solidity ratio.
Date:
October 1950
Creator:
Amer, Kenneth B.
System:
The UNT Digital Library
Theoretical investigation and application of transonic similarity law for two dimensional flow
Report presenting an investigation of the use of the transonic similarity law for two-dimensional flow by an iteration procedure. The results indicated that potential can be expressed as a power series in a single parameter that depends on Mach number, thickness ratio, and ratio of specific heats.
Date:
October 1950
Creator:
Perl, William & Klein, Milton M.
System:
The UNT Digital Library
Effect of Heat-Capacity Lag on a Variety of Turbine-Nozzle Flow Processes
Note presenting the computation of the effect of heat-capacity lag in the adiabatic expansion of a gas through a turbine nozzle computed using a one-dimensional analysis of a representative flow process. A number of parameter variations in the flow process are considered to determine the factors that amplify this effect and to show the magnitude of the deviation from equilibrium conditions.
Date:
October 1950
Creator:
Spooner, Robert B.
System:
The UNT Digital Library
The NACA Oil-Damped V-G Recorder
Note presenting the development of a NACA oil-damped V-G recorder in which viscous damping of accelerometer results in improved frequency response, reduces susceptibility to vibration, and eliminates the necessity for field adjustments of damping.
Date:
October 1950
Creator:
Taback, Israel
System:
The UNT Digital Library