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Jet effects on pressure loading of all-movable horizontal stabilizer

Description: Report presenting an investigation in the 8- by 6-foot supersonic tunnel to determine the effects of a cold exhaust jet on the pressure loadings of an all-movable, 45 degree sweptback horizontal stabilizer located in a region influenced by the jet. Results indicated that at jet pressure ratios of 1 to 9, the exhaust jet did not appreciably affect the pressure loadings of the stabilizer.
Date: June 10, 1954
Creator: Valerino, Alfred S.
open access

Kinetic study of mass transfer by sodium hydroxide in nickel under free-convection conditions

Description: An investigation was conducted using static capsules fabricated from "L" nickel tubing to determine the effect of temperature level, temperature gradient, and test duration on corrosion and mass transfer by molten sodium hydroxide under free-convection conditions. A base temperature range from 1000 degrees to 1600 degrees F with temperature differences to 500 degrees was studied. The rate of mass transfer was found to be strongly dependent on both temperature level and gradient. The rate shows … more
Date: March 10, 1954
Creator: Mosher, Don R. & Lad, Robert A.
open access

Kinetic Treatment of the Nucleation in Supersaturated Vapors

Description: The equations of the individual processes of self nucleation are utilized through an electrical analogy to obtain the nucleation frequency. This process is shown to be shorter and less subject to error than that of previous investigators since the appearance of indeterminant integration constants is completely avoided. With the nucleation frequencies of crystals and spheres the Ostwald law of stages is reviewed and modified.
Date: September 1954
Creator: Becker, R. & Döring, Werner
open access

Laboratory Development of an Electromagnetic Test for Uranium Quality

Description: An electromagnetic instrument similar to the Multitest was built and used to test 2200 uranium slugs. It was found that the equipment could be used to detect inclusions and cracks in the uranium, but that small cracks are not readily detectable on a production basis unless the material is absolutely uniform in inclusion content. The instrument can be used, however, to sort out hidden defects of a reasonable size and to reject grossly dirty uranium.
Date: March 30, 1954
Creator: Headrick, H. B. & Wood, E. C.
open access

Laboratory Scale Abrasive Tests on Ion Exchange Resins

Description: A laboratory scale test was devised to determine the relative physical stability of ion exchange resins designed for use in the resin-in-pulp process. The test was applied to four samples of resins.
Date: July 28, 1954
Creator: Ladner, Hugh A. & Lower, George W.
open access

The Laplace Transform Method of Obtaining X-ray Spectral Energy Distributions

Description: This method essentially consists of analyzing x-ray filtration data in terms of Laplace transforms and obtaining the spectral energy distribution in terms of a sum of the corresponding inverse Laplace transforms. Some of the functions which are especially suited for this application are given and a graphical method of analyzing filtration data in terms of these functions is described. Examples of the practical application of this method to several low energy x-ray machines are included with a d… more
Date: November 20, 1954
Creator: Emigh, C. Robert
open access

Large-scale low-speed wind-tunnel tests of a model having a 60 degree delta horizontal canard control surface and wing to obtain static-longitudinal-stability and canard surface hinge-moment data

Description: Report presenting a wind-tunnel investigation of a model equipped with a 60 degree delta wing and a 60 degree delta horizontal all-movable canard control surface to determine the stability, control, and canard-surface hinge-moment characteristics at low speeds and at a Reynolds number of 9 x 10(exp 6). Two longitudinal positions of the canard surface were tested. Results regarding lift and pitching moment, drag, and hinge moment are provided.
Date: June 17, 1954
Creator: Burrows, Dale L.
open access

Lateral control characteristics of two structural similar flexible wings with 45 degrees sweep: a sweptback wing and a wing with M plan form

Description: Report presenting a low-speed wind-tunnel investigation to determine the static longitudinal control characteristics of flap-type and retractable spoiler-type ailerons on a rigid sweptback wing, a flexible sweptback wing, and a flexible M-wing. Results regarding the rigid-wing and flexible-wing characteristics for each plan form are also provided.
Date: April 26, 1954
Creator: Naeseth, Rodger L.; Croom, Delwin R. & McKee, John W.
open access

Lateral Motions Encountered with the Douglas D-558-II All-Rocket Research Airplane During Exploratory Flights to a Mach Number of 2.0

Description: Memorandum presenting flight tests performed with the Douglas D-558-II research airplane in order to determine the lateral handling characteristics in straight flight at supersonic speeds. It primarily describes the lateral motions obtained at moderate and low angles of attack during a preliminary survey in pushovers and straight flight at supersonic Mach numbers up to about 2.0 at altitudes between 50,000 and 70,000 feet.
Date: December 17, 1954
Creator: Ankenbruck, Herman O. & Wolowicz, Chester H.
open access

Lawrence Radiation Laboratory Medical and Health Physics Quarterly Report: April - June 1954

Description: The following quarterly report covers the period between April, May and June of 1954. The reports presented in this document discusses subjects of medical health and physics such as: biological studies of radiation effects, the metabolic properties of various tracer materials, radiation chemistry, health chemistry, and health physics.
Date: July 29, 1954
Creator: Lawrence Radiation Laboratory
open access

Lawrence Radiation Laboratory Medical and Health Physics Quarterly Report: October - December 1953

Description: The following quarterly report covers a period between October, November, December of 1953 to April of 1954. The document provides reports on medical and health physics, particularly on the biological studies of radiation effects, the metabolic properties of various materials, radiation chemistry, health chemistry, and health physics.
Date: April 1954
Creator: Lawrence Radiation Laboratory
open access

Lawrence Radiation Laboratory Physics Division Quarterly Report: November 1953 - January 1954

Description: The following report is a quarterly report done by the Physics Division of the University of California's Radiation Laboratory, covering the period of November and December of 1953, and January of 1954. This report discusses general physics research and the development and operation of the accelerator.
Date: March 11, 1954
Creator: Lawrence Radiation Laboratory. Physics Division.
open access

Lift and drag characteristics of the Douglas X-3 research airplane obtained during demonstration flights to a Mach number of 1.20

Description: Report presenting lift and drag data obtained during the Douglas X-3 airplane. The data covered the Mach number range from 0.82 to 1.20 with considerable variation in lift. A comparison of the flight data with data from wind-tunnel and rocket-model tests shows that the model tests adequately predict the performance of the airplane.
Date: December 6, 1954
Creator: Bellman, Donald R. & Murphy, Edward D.
open access

Lift and moment coefficients expanded to the seventh power of frequency for oscillating rectangular wings in supersonic flow and applied to a specific flutter problem

Description: From Summary: "Linearized theory for compressible unsteady flow is used to derive the velocity potential and lift and moment coefficients in the form of oscillating rectangular wing moving at a constant supersonic speed. Closed expressions for the velocity potential and lift and moment coefficients associated with pitching and translation are given to seventh power of the frequency. These expressions extend the range of usefulness of NACA report 1028 in which similar expressions were derived to… more
Date: April 1954
Creator: Nelson, Herbert C.; Rainey, Ruby A. & Watkins, Charles E.
open access

Lift and Moment Equations for Oscillating Airfoils in an Infinite Unstaggered Cascade

Description: Aerodynamic coefficients similar to those of the isolated airfoil are obtained as functions of the cascade geometry and the phasing between successive blades; the phasings considered are zero, 90 degrees, and 180 degrees. These aerodynamic coefficients are plotted for the special case when all the airfoils are vibrating in bending in phase (360 degree phasing). It is shown that the effect of cascading for this case is to reduce greatly the aerodynamic damping.
Date: October 1954
Creator: Mendelson, Alexander & Carroll, Robert W.
open access

Lift and Pitching Moment at Supersonic Speeds Due to Constant Vertical Acceleration for Thin Sweptback Tapered Wings With Streamwise Tips: Supersonic Leading and Trailing Edges

Description: Note presenting the nondimensional lift derivative and the corresponding pitching-moment derivative resulting from constant vertical acceleration as evaluated for a family of thin sweptback tapered wings with streamwise tips traveling at supersonic speeds. The analysis is applicable at those speeds for which the wing leading and trailing edges are both supersonic, provided that the Mach lines from the wing apex intersect the trailing edge and that the Mach line from the leading edge of one tip … more
Date: July 1954
Creator: Cole, Isabella J. & Margolis, Kenneth
open access

Lift Developed on Unrestrained Rectangular Wings Entering Gusts at Subsonic and Supersonic Speeds

Description: "The object of this report is to provide an estimate, based on theoretical calculations, of the forces induced on a wing that is flying at a constant forward speed and suddenly enters a vertical gust. The calculations illustrate the effects of Mach number (from 0 to 2) and aspect ratio (2 to infinity), and solutions are given by means of which the response to gusts having arbitrary distributions of velocity can be calculated. The effects of pitching and wing bending are neglected and only wings… more
Date: 1954
Creator: Lomax, Harvard
open access

A Linear, Transparent Beam Integrator

Description: Abstract: "A fast, linear air-ionization chamber has been developed for integrating and monitoring external heavy-particle beams. It consists of a thin-windowed air chamber in which the beam ionization light is viewed by a photomultiplier whose output is fed directly to a standard electrometer."
Date: February 12, 1954
Creator: Kitchen, Sumner W.
open access

Liquefaction of air in the Langley 11-inch hypersonic tunnel

Description: Report presenting pressure and scattered-light measurements in the 11-inch hypersonic tunnel to determine the effect of stagnation temperature on the flow in two Mach number 7 nozzles and to determine the nature of the condensation process occurring at low stagnation temperatures. Results regarding the static-pressure measurements, Mach number effect, particle size and concentration, and general discussion are provided.
Date: October 1954
Creator: McLellan, Charles H. & Williams, Thomas W.
open access

Lithium Resources of North America

Description: Report discussing the various resources of lithium for the United States and Canada. The report contains information regarding the geology of lithium in the U.S. and Canada, lithium reserves and resources, and the future of the lithium mining industry.
Date: October 1954
Creator: Norton, James J. & Schlegel, Dorothy McKenney
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