Airborne Radioactivity Survey of the Red Desert Region, Sweetwater County, Wyoming (open access)

Airborne Radioactivity Survey of the Red Desert Region, Sweetwater County, Wyoming

From abstract: An airborne radioactivity survey of a selected area in the Red Desert, Sweetwater County, Wyoming, containing outcrops of radioactive lignites and shales of known surface extent and uranium content, was flown on flight lines at three levels, respectively 250, 500, and 1,000 feet above the ground and spaced at one-quarter mile intervals. Measurements from three identical dual-channel radiation detectors were simultaneously recorded to obtain data at various distances from natural radioactive sources of known configuration. The radiation intensity measurements were fully corrected for all extraneous effects and were compiled as profiles of radiation intensity, as an isoradioactivity contour map, and as curves showing the relationship between radiation intensity and distance from the source.
Date: July 1951
Creator: Nelson, R. A.; Sharp, William N. & Stead, Frank W.
Object Type: Report
System: The UNT Digital Library
Altitude-Test-Chamber Investigation of Performance of a 28-Inch Ram-Jet Engine 4: Effect of Inlet-Air Temperature, Combustion-Chamber-Inlet Mach Number, and Fuel Volatility on Combustion Performance (open access)

Altitude-Test-Chamber Investigation of Performance of a 28-Inch Ram-Jet Engine 4: Effect of Inlet-Air Temperature, Combustion-Chamber-Inlet Mach Number, and Fuel Volatility on Combustion Performance

Report presenting testing of the effects of the following variables on combustion performance are determined: inlet-air temperature, combustion-chamber-inlet Mach number and pressure, and fuel density and volatility.
Date: July 27, 1951
Creator: Kahn, Robert W.; Nakanishi, Shigeo & Harp, James L., Jr.
Object Type: Report
System: The UNT Digital Library
Analysis of Meteorological Data Obtained During Flight in a Supercooled Stratiform Cloud of High Liquid-Water Content (open access)

Analysis of Meteorological Data Obtained During Flight in a Supercooled Stratiform Cloud of High Liquid-Water Content

"Flight icing-rate data obtained in a dense and abnormally deep supercooled stratiform cloud system indicated the existence of liquid-water contents generally exceeding values in amount and extent previously reported over the midwestern sections of the United States. Additional information obtained during descent through a part of the cloud system indicated liquid-water contents that significantly exceeded theoretical values, especially near the middle of the cloud layer. The growth of cloud droplets to sizes that resulted in sedimentation from the upper portions of the cloud is considered to be a possible cause of the high water contents near the center of the cloud layer" (p. 1).
Date: July 11, 1951
Creator: Perkins, Porter J. & Kline, Dwight B.
Object Type: Report
System: The UNT Digital Library
Analytical Investigation of Fully Developed Laminar Flow in Tubes With Heat Transfer With Fluid Properties Variable Along the Radius (open access)

Analytical Investigation of Fully Developed Laminar Flow in Tubes With Heat Transfer With Fluid Properties Variable Along the Radius

"In the analytical investigation reported herein, which was conducted in the NACA Lewis laboratory, both velocity and temperature distribution are obtained for fully developed laminar flow in tubes of gases and of liquid metals with variable fluid properties" (p. 1).
Date: July 1951
Creator: Deissler, Robert G.
Object Type: Report
System: The UNT Digital Library
Analytical results on leachings from Nutsche Filters (open access)

Analytical results on leachings from Nutsche Filters

This report describes results of an investigation to determine whether plutonium nitrates and lanthanum compounds were being entrained on the filter aid and filter block of the Nutsche Filters in Cell 2 of Bldg. 231. Leach samples were analyzed for La, Pu, phosphate, fluoride, Pu{sup 240}, and Am. From the data the authors concluded that the holdup on the Nutsche Filter is due to insoluble plutonium compounds either filtered from solution, or more likely, formed on the filter. These compounds would have a relatively low solubility in 25% nitric acid and would dissolve slowly, thus permitting a gradual buildup of material on the filter which was not detected until leaching with 60% nitric acid was instituted.
Date: July 2, 1951
Creator: Barton, G.B.
Object Type: Report
System: The UNT Digital Library
Apparatus for obtaining a supersonic flow of very short duration and some drag measurements obtained with its use (open access)

Apparatus for obtaining a supersonic flow of very short duration and some drag measurements obtained with its use

From Introduction: "The auxiliary apparatus described in this paper was constructed to meet this need and has been developed to a point where satisfactory measurements of relative drag can be obtained. In this paper, the apparatus is described and some comparisons are made between the results obtained with this apparatus and the measurements of free-fall, rocket, and supersonic-tunnel techniques."
Date: July 23, 1951
Creator: Yeates, John E., Jr.; Bailey, F. J., Jr. & Voglewede, T. J.
Object Type: Report
System: The UNT Digital Library
Application of X-Ray Absorption to Measurement of Small Air-Density Gradients (open access)

Application of X-Ray Absorption to Measurement of Small Air-Density Gradients

Report presenting an analysis of two x-ray absorption methods for determining small air-density gradients. One method uses a Geiger-Mueller counter for detection and the other uses photographic film for detection. Both of the methods are found to have some advantages and disadvantages.
Date: July 1951
Creator: Weltmann, Ruth N.; Fairweather, Steven & Papke, Daryl
Object Type: Report
System: The UNT Digital Library
Approximate design method for high-solidity blade elements in compressors and turbines (open access)

Approximate design method for high-solidity blade elements in compressors and turbines

Note presenting an approximate blade-element design method for compressible or incompressible nonviscous flow in high-solidity stators or rotors of axial-, radial-, or mixed-flow compressors, turbines, or two-dimensional cascades. The method is based upon channel-type flow between blade elements on a specified surface of revolution that lies between the hub and shroud and is concentric with the axis of the compressor turbine.
Date: July 1951
Creator: Stanitz, John D.
Object Type: Report
System: The UNT Digital Library
Axial-Momentum Theory for Propellers in Compressible Flow (open access)

Axial-Momentum Theory for Propellers in Compressible Flow

Note presenting the development of the axial-momentum theory for compressible flow as a step in the formulation of a rational propeller theory for compressible flow. The simple theory neglects some properties but predicts flow conditions through a propeller that are significantly different from the conditions predicted by the incompressible-flow theory.
Date: July 1951
Creator: Vogeley, Arthur William
Object Type: Report
System: The UNT Digital Library
Bench-Test Investigation of the Transient-Response Characteristics of Several Simulated Airplanes Incorporating an Autopilot Sensitive to Yawing Accelerations (open access)

Bench-Test Investigation of the Transient-Response Characteristics of Several Simulated Airplanes Incorporating an Autopilot Sensitive to Yawing Accelerations

Note presenting testing of an autopilot sensitive to yawing acceleration, which was used to control four simulated airplane (mass-spring) configurations, and a series of bench tests to determine the response characteristics of the combinations.
Date: July 1951
Creator: Howard, Donald A.
Object Type: Report
System: The UNT Digital Library
Carbon Dioxide Fixation by Microorganisms (open access)

Carbon Dioxide Fixation by Microorganisms

Resting cells of eleven microorganisms were exposed to radioactive carbon dioxide for 40 minutes. The radioactive compounds formed during this time were separated and identified by paper chromatography. Resting cells of Lactobacillus casei fixed no carbon dioxide and growing cells fixed carbon dioxide primarily in malic and aspartic acids. All of the radioactive compounds formed could have become radioactive by reversal of known decarboxylation reactions.
Date: July 24, 1951
Creator: Lynch, Victoria H. & Calvin, Melvin
Object Type: Report
System: The UNT Digital Library
Carnotite Resources of the Upper Group Area, San Miguel County, Colorado (open access)

Carnotite Resources of the Upper Group Area, San Miguel County, Colorado

Report discussing the exploration of the Upper group area in San Miguel County, Colorado, and the investigation of carnotite ores produced from this area.
Date: July 1951
Creator: Withington, Charles F.
Object Type: Report
System: The UNT Digital Library
Characteristics throughout the subsonic speed range of a plane wing and of a cambered and twisted wing, both having 45 degrees of sweepback (open access)

Characteristics throughout the subsonic speed range of a plane wing and of a cambered and twisted wing, both having 45 degrees of sweepback

Report presenting a wind-tunnel investigation of two semispan wing models with 45 degrees of sweepback, an aspect ratio of 5, and a taper ratio of 0.565. One wing had no camber or twist while the other was cambered for a design lift coefficient of 0.4 and twisted to relieve loading at the tip. Results regarding the plane wing, cambered and twisted wing, wing-body combinations, effect of camber and twist, effect of fences, effect of surface roughness, and lift-drag ratio are provided.
Date: July 12, 1951
Creator: Johnson, Ben H., Jr. & Shibata, Harry H.
Object Type: Report
System: The UNT Digital Library
Charts Giving Critical Compressive Stress of Continuous Flat Sheet Divided Into Parallelogram-Shaped Panels (open access)

Charts Giving Critical Compressive Stress of Continuous Flat Sheet Divided Into Parallelogram-Shaped Panels

"Charts giving the compressive-buckling stress coefficients for sheet panels of a shape occurring in swept-wing plan forms are presented. The panels are assumed to be a part of a continuous flat sheet divided by nondeflecting supports into parallelogram-shaped areas. The stability analysis was performed by the energy method and the results show that, over a wide range of panel aspect ratio, such panels are decidedly more stable than equivalent rectangular panels of the same area" (p. 1).
Date: July 1951
Creator: Anderson, Roger A.
Object Type: Report
System: The UNT Digital Library
Compilation and review of effects of design parameters on ditching characteristics (open access)

Compilation and review of effects of design parameters on ditching characteristics

From Summary: "This paper supplements a previously published one on the effect of design parameters on ditching characteristics. The supplementary information is based on additional data available from both model tests and full-scale experience. In addition, summary tables compiled from the NACA model ditching investigations are presented."
Date: July 10, 1951
Creator: Fisher, Lloyd J. & Hoffman, Edward L.
Object Type: Report
System: The UNT Digital Library
Constant chemical addition to reduction operation in the 234-5 Building (open access)

Constant chemical addition to reduction operation in the 234-5 Building

At the request of the ``S`` Division, a study has been made regarding the feasibility of simplifying operations by standardizing the amounts of chemical additions made at the reduction step as is the current practice in the purification operation. The investigation included a study of the following items, which are discussed under separate headings: (1) variation in feed; (2) maximum variation in booster ratios and per cent excess calcium using the method; and (3) chemicals handling and storage procedures. The process reduces plutonium fluoride to the metal.
Date: July 29, 1951
Creator: Quinn, F.J.
Object Type: Report
System: The UNT Digital Library
Construction and Use of Charts in Design Studies of Gas Turbines (open access)

Construction and Use of Charts in Design Studies of Gas Turbines

"A method is presented for the computation and graphic representation of a series of possible turbine designs for any specific application. The use of a preliminary design chart is suggested for determining the number of stages and the effects of exit whirl and annular-area divergence on possible configurations. A specific design chart can then be made to aid in the study of the relations between turbine radius ratio, diameter, and significant design parameters such as Mach numbers, turning angles, and blade root stresses" (p. 1).
Date: July 1951
Creator: Alpert, Sumner & Litrenta, Rose M.
Object Type: Report
System: The UNT Digital Library
A Continuous Fission Product Separation Process; I. Removal of the Rare Earths (Lanthanum Cerium, Praseodymium, and Neodymium) From a Typical Liquid Bismuth-Uranium Reactor Fuel by Contact with Fused LiCl-KCl Mixtures (open access)

A Continuous Fission Product Separation Process; I. Removal of the Rare Earths (Lanthanum Cerium, Praseodymium, and Neodymium) From a Typical Liquid Bismuth-Uranium Reactor Fuel by Contact with Fused LiCl-KCl Mixtures

Technical report investigating the distribution of rare earth elements between a liquid bismuth-uranium solution and fused KCI-LiCi mixtures. Report warrants further research on the liquid bismuth-uranium-fused salt system due to the benefit of continuous fission removal processes.
Date: July 1, 1951
Creator: Bareis, D. W.
Object Type: Report
System: The UNT Digital Library
Contributions of wing, tail, and fuselage to the aerodynamic characteristics of a semispan model of a supersonic airplane configuration at transonic speeds from tests by the NACA wing-flow method (open access)

Contributions of wing, tail, and fuselage to the aerodynamic characteristics of a semispan model of a supersonic airplane configuration at transonic speeds from tests by the NACA wing-flow method

Report presenting an investigation using the NACA wing-flow method at transonic speeds to determine the contributions of wing, tail, and fuselage to the aerodynamic characteristics of a semispan airplane model with a long slender fuselage and straight wing and tail of low aspect ratio with faired symmetrical double-wedge airfoil sections 4.6 percent of the chord in thickness. Results regarding the drag, pitching moment, downwash, and lift are provided.
Date: July 11, 1951
Creator: Silsby, Norman S. & McKay, James M.
Object Type: Report
System: The UNT Digital Library
Control of the Garden Webworm in Alfalfa. (open access)

Control of the Garden Webworm in Alfalfa.

Describes the characteristics of the garden webworm, the damage it causes to alfalfa crops, and methods of control.
Date: July 1951
Creator: Poos, F. W.
Object Type: Book
System: The UNT Digital Library
Cutting for profit in Southern pine woodlands. (open access)

Cutting for profit in Southern pine woodlands.

A guide to managing farm woodlands as a source of income, with a focus on loblolly and shortleaf pine and hardwoods.
Date: July 1951
Creator: Bond, W. E. (Walter Edwin), 1891-
Object Type: Book
System: The UNT Digital Library
Design of two-dimensional channels with prescribed velocity distributions along the channel walls (open access)

Design of two-dimensional channels with prescribed velocity distributions along the channel walls

"A general method of design is developed for two-dimensional unbranched channels with prescribed velocities as a function of arc length along the channel walls. The method is developed for both compressible and incompressible, irrotational, nonviscous flow and applies to the design of elbows, diffusers, nozzles, and so forth. In part I solutions are obtained by relaxation methods; in part II solutions are obtained by a Green's function. Five numerical examples are given in part I including three elbow designs with the same prescribed velocity as a function of arc length along the channel walls but with incompressible, linearized compressible, and compressible flow" (p. 153).
Date: July 25, 1951
Creator: Stanitz, John D.
Object Type: Report
System: The UNT Digital Library
Effects of Design Details on the Fatigue Strength of 355-T6 Sand-Cast Aluminum Alloy (open access)

Effects of Design Details on the Fatigue Strength of 355-T6 Sand-Cast Aluminum Alloy

Note presenting static and fatigue tests made on 355-T6 sand-cast plate-type aluminum-alloy specimens incorporating holes, bosses, and ribs. In the static tests, the tensile strength of the plain plate-type specimen agreed within 3 percent with the strength of separately cast test bars. Of the design details studied, the unreinforced hole was the most effective stress-raiser for fatigue lives from 10,000 to 25,000,000 cycles.
Date: July 1951
Creator: Holt, M. & Eaton, I. D.
Object Type: Report
System: The UNT Digital Library
Effects of double-slotted flaps and leading-edge modifications on the low-speed characteristics of a large-scale 45 degrees swept-back wing with and without camber and twist (open access)

Effects of double-slotted flaps and leading-edge modifications on the low-speed characteristics of a large-scale 45 degrees swept-back wing with and without camber and twist

Report presenting an investigation of two large-scale, semispan, wing-fuselage models with the 0.25-chord line swept back 45 degrees to determine and compare the effects of partial-span, double-slotted flaps on the characteristics of a 45 degree sweptback wing with and without camber and twist. A secondary investigation was also conducted to determine the effects of various full-span, leading-edge modifications on the characteristics of the models with and without the flaps.
Date: July 23, 1951
Creator: James, Harry A. & Dew, Joseph K.
Object Type: Report
System: The UNT Digital Library