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Serial/Series Title
NACA Research Memorandums
364
NACA Technical Notes
184
Atomic Energy Commission Reports
122
United States Geological Survey Reports
109
Trace elements investigations report
62
Hanford Works Reports
50
University of California Radiation Laboratory Reports
44
HW (Series)
36
Oak Ridge National Laboratory Reports
28
NACA Technical Reports
22
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988 Matching Results
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988
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An analysis of the normal accelerations and airspeeds of a four-engine airplane type in postwar commercial transport operations on trans-Pacific and Caribbean-South American routes
Report presenting an analysis of normal-acceleration and airspeed data on several transport airplanes of a four-engine type during postwar commerical operations on trans-Pacific and Caribbean-South American routes of the same airlines. The results indicate that the acceleration increment corresponding to the limit-gust-load-factor increment may be exceed about twice in all of the flight miles for each route. Results regarding accelerations, flight loads, gust encounters, and speeds are provided.
Date:
August 1950
Creator:
Coleman, Thomas L. & Schumacher, Paul W. J.
Object Type:
Report
System:
The UNT Digital Library
Burning Anthracite Barley on a Chain-Grate Stoker in a Two-Arch Furnace
Report issued by the U.S. Bureau of Mines on the use of anthracite barley as a fuel for a chain-grate stoker in a two-arch furnace. The efficiency and capacity of the anthracite barley as fuel is presented. Tables, graphs, and illustrations are included in the report.
Date:
August 1950
Creator:
Burdick, L. R. & Morgan, R. E.
Object Type:
Report
System:
The UNT Digital Library
Calculated Engine Performance and Airplane Range for Variety of Turbine-Propeller Engines
Note presenting an analysis of the performance of basic, reheat, regenerative, and regenerative-plus-reheat turbine-propeller engines. The analysis covered an overall range of flight speeds, altitudes, and turbine-inlet temperatures for a range of compressor pressure ratios.
Date:
August 1950
Creator:
Nagey, Tibor F. & Martin, Cecil G.
Object Type:
Report
System:
The UNT Digital Library
Charts for Estimating Downwash Behind Rectangular, Trapezoidal, and Triangular Wings at Supersonic Speeds
Note presenting charts for estimating the downwash behind wings in a supersonic stream. The wing plan forms for which compositions are made include rectangular wings with reduced aspect ratios of 2, 4, 8, and 12; trapezoidal wings with reduced aspect ratios ranging from 2 to 12.8 and taper ratios of 1/2 and 1/4; and triangular wings with reduced aspect ratios of 8 and 12. A procedure is indicated to correct for the displacement and the distortion of the trailing vortex sheet.
Date:
August 1950
Creator:
Haefeli, Rudolph C.; Mirels, Harold & Cummings, John L.
Object Type:
Report
System:
The UNT Digital Library
Chattanooga Shale of the Eastern Highland Rim, Tennessee
Report discussing a geological study of the Chattanooga Shale of the Eastern Highland Rim area of Tennessee in 1947, 1948, and 1949 to determine its availability as a source of uranium.
Date:
August 1950
Creator:
Conant, L. C.; Brown, Andrew & Hass, W. H.
Object Type:
Report
System:
The UNT Digital Library
Comparison of the Experimental Pressure Distribution on an NACA 0012 Profile at High Speeds With That Calculated by the Relaxation Method
Note presenting pressure-distribution measurements made on a 5-inch-chord NACA 0012 airfoil at zero angle of attack in the Langley rectangular high-speed tunnel, a 4- by 18-inch closed-throat tunnel, and compared with results calculated by Emmons for an equivalent airfoil-channel configuration by using the relaxation method.
Date:
August 1950
Creator:
Amick, James L.
Object Type:
Report
System:
The UNT Digital Library
Contribution to the Problem of Buckling of Orthotropic Plates, With Special Reference to Plywood
Planar stress-strain relations and bending stress-strain relations are presented for elastic orthotropic plates and specialized to plywood. These relations are used to derive the differential equation and energy expression for the buckling of orthotropic rectangular plates whose principal stiffness directions are not parallel to the plate edges. Buckling analyses are made for the case of pure compression and pure shear of a long plate-strip.
Date:
August 1950
Creator:
Thielemann, Wilhelm
Object Type:
Report
System:
The UNT Digital Library
Critical stress of plate columns
Report presenting solutions for the elastic buckling stress of flat rectangular plates with simply supported or fixed ends when loaded as columns. The procedure for determining the critical stress of plate columns with intermediate end fixities is also given.
Date:
August 1950
Creator:
Houbolt, John C. & Stowell, Elbridge Z.
Object Type:
Report
System:
The UNT Digital Library
Density fields around a sphere at Mach numbers 1.30 and 1.62
From Summary: "Interferograms were taken of the flow around a sphere at Mach numbers of 1.30 and 1.62. The results of the evaluation of these interferograms are shown as plots of contours of constant density ratio in the flow field around the sphere and as the distribution of flow variables along the axis of symmetry between the shock wave and the sphere. In appendixes the theory of the analysis is reviewed, sources of error are discussed, and the detailed procedure used in the evaluation of interferograms is described."
Date:
August 1950
Creator:
Gooderum, Paul B. & Wood, George P.
Object Type:
Report
System:
The UNT Digital Library
Dependence of the Elastic Strain Coefficient of Copper on the Pre-Treatment
The effect of various pre-treatments on the elastic strain coefficient (alpha) (defined as the reciprocal of the modulus of elasticity E) (Epsilon) and on the mechanical hysteresis of copper has been investigated. Variables comprising the pre-treatments were pre-straining by stretching in a tensile testing machine and by drawing through a die, aging at room and elevated temperatures and annealing. The variation of the elastic strain coefficient with test stress was also investigated.
Date:
August 1950
Creator:
Kuntze, Wilhelm
Object Type:
Report
System:
The UNT Digital Library
Effect of an unswept wing on the contribution of unswept-tail configuration to the low-speed static and rolling-stability derivatives of a midwing airplane model
Report presenting an investigation conducted in the stability tunnel to determine the effect of an unswept wing on the contribution of unswept-tail configurations to the low-speed-static- and rolling-stability derivatives of a midwing airplane model. The results show that there tend to be only small differences in the tail contributions to the static-lateral-stability derivatives for configurations with the wing on and wing off.
Date:
August 1950
Creator:
Letko, William & Riley, Donald R.
Object Type:
Report
System:
The UNT Digital Library
Effect of chemical reactivity of lubricant additives on friction and surface welding at high sliding velocities
Report presenting an investigation of the effect of chemical reactivity of lubricant additives on friction at high sliding velocities. The investigation was conducted with a kinetic-friction apparatus consisting of an elastically restrained spherical rider specimen sliding on a rotating steel disk lubricated with cetane containing lubricant additives of different chemical reactivities. Results regarding chlorine compounds and sulfur compounds are provided.
Date:
August 1950
Creator:
Bisson, Edmond E.; Swikert, Max A. & Johnson, Robert L.
Object Type:
Report
System:
The UNT Digital Library
Effect of heat and power extraction on turbojet-engine performance 2: effect of compressor-outlet air bleed for specific modes of engine operation
Report presenting the calculation of the effect of air bleed from the compressor outlet on the performance of turbojet engines with variable-area and rated-area tail-pipe nozzles using generalized performance charts. The effect of altitude, compressor-inlet temperature, and flight Mach number on engine performance with air bleed are provided.
Date:
August 1950
Creator:
Rom, Frank E. & Koutz, Stanley L.
Object Type:
Report
System:
The UNT Digital Library
Effect of Initial Mixture Temperature on Flame Speeds and Blow-Off Limits of Propane - Air Flames
Report presenting the effect of initial mixture temperature on flame speeds in the laminar flow region and on blow off limits in both laminar and turbulent-flow regions was investigated for Bunsen type flames of propane and air. Flame speeds were determined at various mixture compositions at a range of temperatures and by measuring the area of the Bunsen cone from shadowgraphs.
Date:
August 1950
Creator:
Dugger, Gordon L.
Object Type:
Report
System:
The UNT Digital Library
Effect of Oil-Base Drilling Fluid Filtrate on Analysis of Cores from South Coles Levee, California, and Rangely, Colorado Fields
Report issued by the U.S. Bureau of Mines on the study of contamination of cores obtained with conventional core barrels. The effect of the oil-based drilling fluid and analysis of the cores are presented. The report includes tables, graphs, and illustrations.
Date:
August 1950
Creator:
Gates, Gates L.; Morris, Frank C. & Caraway, W. Hodge
Object Type:
Report
System:
The UNT Digital Library
Examination for Radioactivity in a Copper-Lode Prospect on Ruby Creek Kobuk River Valley, Alaska
The following report covers investigations on radioactivity in copper-bearing iron oxide mineralization fissures and fractures in narrow zones within Kobuk River Valley, Alaska.
Date:
August 1950
Creator:
White, M. G.
Object Type:
Report
System:
The UNT Digital Library
Experimental Investigation of Air-Cooled Turbine Blades in Turbojet Engine 2: Rotor Blades With 15 Fins in Cooling-Air Passages
Report presenting an investigation to experimentally determine the effectiveness of air-cooling several configurations of turbine blades in a turbojet engine. The results of the second blade configuration, which consists of a hollow blade shell with 15 fins inserted, are provided. The factors involved in the design of the blade configuration are also included.
Date:
August 1950
Creator:
Hickel, Robert O. & Ellerbrock, Herman H., Jr.
Object Type:
Report
System:
The UNT Digital Library
Experimental investigation of the effect of vertical-tail size and length of fuselage shape and length on the static lateral stability characteristics of a model with 45 degree sweptback wing and tail surfaces
Report presenting an investigation to determine the effects of vertical-tail size and length and of fuselage shape and length on the lateral static stability characteristics of a model with a wing and vertical tails with the quarter-chord line swept back 45 degrees. Results indicated that the directional instability of the fuselage was about two-thirds as large as that predicted by classical theory. Results regarding wing characteristics, fuselage characteristics, vertical-tail effectiveness, and interference effects are provided.
Date:
August 1950
Creator:
Queijo, M. J. & Wolhart, Walter D.
Object Type:
Report
System:
The UNT Digital Library
Exploration of the Big Boulder Prospect, Larimer County, Colorado
From introduction: The Big Boulder prospect is in SE 1/4 sec. 36, T.7N., R.,72W., in Tarimer County, Colorado. The prospect has been opened by four irregular trenches and shallow cuts, and a 10-foot discovery shaft. Hanley 1/4 states that 10.5 tons of beryl were produced from the Big Boulder prospect in 1936, and about 600 pounds in 1941.
Date:
August 1950
Creator:
Thurston, W. R.
Object Type:
Report
System:
The UNT Digital Library
Flight investigation of the effect of transient wing response on measured accelerations of a modern transport airplane in rough air
Report presenting a flight investigation on a transport airplane to determine the effect of transient wing response in rough air on acceleration measurements at the center of gravity of the airplane. Flights were made in clear-air turbulence over a range of altitudes for two speed conditions and different wing weights. Results indicate that the peak recorded center-of-gravity acceleration increments were over 20 percent higher than the true airplane acceleration increments.
Date:
August 1950
Creator:
Shufflebarger, C. C. & Mickleboro, Harry C.
Object Type:
Report
System:
The UNT Digital Library
The Fluorimetric Determination of Aluminum in Phosphate Rock With S-Hydroxyquinoline
From abstract: "A method is described whereby aluminum in phosphate rock is determined by the fluorescence of aluminum hydroxyquinolate in chloroform solution."
Date:
August 1950
Creator:
Grimaldi, F. S. & Levine, Harry
Object Type:
Report
System:
The UNT Digital Library
Forty-Niner, King Solomon Ridge, and West End Claims Near Clancy, Jefferson County, Montana
Abstract: Secondary minerals of the uranite group occur in dense quartz veins and in altered aplitic granite along and near the crest of the east-trending ridge about one mile west of Clancy, Montana. Brief examination suggests that the radioactive minerals are erratically distributed, but a more thorough study of the area will be made by the Geological Survey during the coming field season.
Date:
August 1950
Creator:
Klepper, M. R.
Object Type:
Report
System:
The UNT Digital Library
A General Integral Form of the Boundary-Layer Equation for Incompressible Flow With an Application to the Calculation of the Separation Point of Turbulent Boundary Layers
Note presenting a general integral form of the boundary-layer equation that is derived from the Prandtl partial-differential boundary-layer equation. The general integral equation, valid for either laminar or turbulent incompressible boundary-layer flow, contains the Von Karman momentum equation, the kinetic-energy equation, and the Loitsianskii equation as special cases.
Date:
August 1950
Creator:
Tetervin, Neal & Lin, Chia Chiao
Object Type:
Report
System:
The UNT Digital Library
The Heat of Solution of Neptunium Metal and the Heats of Formation of some Neptunium Chlorides ; A Microcalorimeter for Heat of Solution Measurements
Due to a need of precise thermodynamical and thermochemical data on these elements and their compounds for the understanding and correlation of the chemical behavior of these substances, this report measures the heat of the solution of neptunium metal and the heats of formation of the neptunium chlorides using a microcalorimeter to measure the heat.
Date:
August 1950
Creator:
Westrum, Edgar F., Jr. & Eyring, LeRoy
Object Type:
Report
System:
The UNT Digital Library