37 Matching Results

Search Results

Results: 1 - 24 next
open access

Physics of Solids Institute Quarterly Progress Report [for] Period Ending April 30, 1951

Description: Technical report outlining the building status, crystal physics, solid state reactions, radiation metallurgy, engineering properties, and liquid fuels activities of the Physics of Solids Institute in period ending April 30, 1951. [From Introduction and Summary]
Date: November 26, 1951
Creator: Billington, D. S. & Howe, J. T.
Partner: UNT Libraries Government Documents Department
open access

Some effects of frequency on the contribution of a vertical tail to the free aerodynamic damping of a model oscillating in yaw

Description: The damping in yaw and the directional stability of a model freely oscillating in yaw were measured tail-off and tail-on and compared with the values obtained by theoretical consideration of the unsteady lift associated with an oscillating vertical tail. A range of low frequencies comparable to those of the lateral motions of airplanes was covered. The analysis includes the effects of vertical-tail aspect ratio and the two-dimensional effects of compressibility.
Date: November 26, 1951
Creator: Bird, John D.; Fisher, Lewis R. & Hubbard, Sadie M.
Partner: UNT Libraries Government Documents Department
open access

Calcining-Amenability Testing of Rand Precipitates

Description: Test work on two samples of high-grade Rand uranium precipitate indicated the desirability of calcining it at 400' to 500'C. to cut shipping costs and provide a refinery feed quite amenable to treatment by the nitric acid digestion-TBP process.
Date: November 26, 1951
Creator: Bloecher, F. W.
Partner: UNT Libraries Government Documents Department
open access

Note on the Doppler Effect

Description: The following report notes a general formula for the determination of the effect of atomic motion on nuclear cross sections, and evaluate the expression exactly in a few cases of interest.
Date: November 26, 1951
Creator: Coveyou, R. R.
Partner: UNT Libraries Government Documents Department
open access

Calculated Performance of a Mercury-Compressor-Jet Powered Airplane Using a Nuclear Reactor as an Energy Source

Description: Memorandum presenting an analysis of a system consisting of a mercury turbine-driven air compressor a mercury condenser wherein heat was added to the compressed air. The heat addition to the mercury is accomplished in an intermediate heat exchanger (mercury boiler) which has a liquid metal, other than mercury, circulating through the opposite side and through a nuclear reactor. Results regarding the turbine-exhaust pressure, turbine-inlet pressure, condenser-inlet Mach number, effect of nacelle… more
Date: September 26, 1951
Creator: Doyle, R. B.
Partner: UNT Libraries Government Documents Department
open access

Effect of Surface Finish on Fatigue Properties at Elevated Temperatures 1: Low-Carbon N-155 With Grain Size of A.S.T.M. 1

Description: Effect of three surface finishes of roughness 4 to 5, 20 to 25, and 70 to 80 micro inches rms on fatigue properties were determined for low-carbon N-155 alloy of grain size A.S.T.M. 1 at temperatures of 80 , 1000, 1350, and 1500 F. The fatigue properties for the various finishes differed appreciably at room temperature; however, after short periods at 1000 F and for all periods investigated at temperatures above 1000 F, the specimen finishes had the same fatigue strength. It was concluded that … more
Date: June 26, 1951
Creator: Ferguson, Robert R.
Partner: UNT Libraries Government Documents Department
open access

The Origin of Aerodynamic Instability of Supersonic Inlets at Subcritical Conditions

Description: Memorandum presenting an investigation of the phenomenon of the starting of aerodynamic instability or buzz in supersonic inlets with external compression. The starting of the buzz has been related to the existence in the flow field of a velocity discontinuity across a vortex sheet which originates at a shock intersection. Results regarding the inlets without separation on the central body, inlets with separation on the central body, the regulation of entering volume flow at angles of attack, e… more
Date: January 26, 1951
Creator: Ferri, Antonio & Nucci, Louis M.
Partner: UNT Libraries Government Documents Department
open access

The Synthetic Liquid Fuel Potential of Arizona

Description: Report documenting the suitability of Arizona for plant locations to produce synthetic liquid fuels, based on raw materials, water sources, and local interest. In this report, they analyze the state primarily for coal deposits suitable for synthetic liquid fuels.
Date: February 26, 1951
Creator: Ford, Bacon, and Davis
Partner: UNT Libraries Government Documents Department
open access

Carbonate Cleavage in the Hydrolysis of Diethyla-Naphthylmalonate

Description: A kinetic product study of the carbonate cleavage of malonic ester has been made, and it is shown that the formation of carbonate from malonic ester in alkaline solution involves the direct fission of the half acid ester.
Date: November 26, 1951
Creator: Fry, Arthur & Calvin, Melvin
Partner: UNT Libraries Government Documents Department
open access

Resistance of Various Materials to Attack by Molten Bismuth-Lead Eutectic at Elevated Temperatures

Description: "The resistance of 40 materials including alloys, ceramics, ceramals, and pure metals to attack by bismuth-lead eutectic at temperatures between 1500 and 2000 F was investigated. A velocity of 15 feet per second was maintained between the material surface and the bismuth-lead eutectic. Those materials found to be resistant to this attack included 17 of the ceramals and ceramics, graphite, and arc-cast molybdenum" (p. 1).
Date: September 26, 1951
Creator: Gangler, James J. & Engel, Walter J.
Partner: UNT Libraries Government Documents Department
open access

A Study of Thorium-Base Alloys

Description: Report discussing studies testing various thorium alloys consisting of either Ames thorium and up to 5% of various additions or Ames thorium and up to 50% uranium. Effects of molybdenum additions for fusion welding, and cold-work strengthening were also tested. Methods, experimental data, and discussion is included.
Date: December 26, 1951
Creator: Goldhoff, R. M.; Ogden, Horace R. & Jaffee, Robert Isaac, 1917-
Partner: UNT Libraries Government Documents Department
open access

The Effect of Raking the Aileron Tips on the Lateral-Control and Hinge-Moment Characteristics of a 20-Percent-Chord Partial-Span Outboard Aileron on a Wing With Leading-Edge Swept Back 51.3 Degrees

Description: Report presenting an investigation at low speed to determine the lateral-control and hinge-moment characteristics of a 20-percent-chord unsealed partial-span outboard aileron with several plan forms. Results regarding the wing aerodynamic characteristics are also provided.
Date: November 26, 1951
Creator: Hammond, Alexander D.
Partner: UNT Libraries Government Documents Department
open access

Mathematics Panel Quarterly Progress Report [for] the Period Ending July 31, 1951

Description: Technical report describing work on two special projects: (1) the Oak Ridge Computer; and (2) numerical integration of differential equations; multipoint boundary problems. The reports also describes work on thirty special problems.
Date: November 26, 1951
Creator: Householder, A. S.
Partner: UNT Libraries Government Documents Department
open access

Free-Spinning Tunnel Investigation of a 1/20-Scale Model of the Douglas X-3 Airplane

Description: Report discussing the spin and spin-recovery characteristics of a model of the Douglas X-3 airplane in a free-spinning tunnel. The pitching-moment characteristics of the scale model were not found to be typical of larger scale results. The results indicated that at an altitude range of 15,000 to 30,000 feet, the X-3 will not exhibit unusual trim tendencies and it will be difficult to obtain erect spins unless the ailerons are full with the spin.
Date: December 26, 1951
Creator: Hultz, Burton E.
Partner: UNT Libraries Government Documents Department
open access

Investigation of wear and friction properties under sliding conditions of some materials suitable for cages of rolling-contact bearings

Description: "An investigation of wear and friction properties of a number of materials sliding against SAE 52100 steel was conducted. These materials included brass, bronze, beryllium copper, monel, nichrome v, 24S-T aluminum, nodular iron, and gray cast iron. The metals investigated may be useful as possible cage (separator or retainer) materials for rolling-contact bearings of high-speed turbine engines. The ability of materials to form surface films that prevent welding is a most important factor in bot… more
Date: March 26, 1951
Creator: Johnson, Robert L.; Swikert, Max A. & Bisson, Edmond E.
Partner: UNT Libraries Government Documents Department
open access

A summary of lateral-stability derivatives calculated for wing plan forms in supersonic flow

Description: "A compilation of theoretical values of the lateral-stability derivatives for wings at supersonic speeds is presented in the form of design charts. The wing plan forms for which this compilation has been prepared include a rectangular, two trapezoidal, two triangular, a fully-tapered swept-back, a sweptback hexagonal, an unswept hexagonal, and a notched triangular plan form. A full set of results, that is, values for all nine of the lateral-stability derivatives for wings, was available for the… more
Date: June 26, 1951
Creator: Jones, Arthur L. & Alksne, Alberta
Partner: UNT Libraries Government Documents Department
open access

Base pressures measured on several parabolic-arc bodies of revolution in free flight at Mach numbers from 0.8 to 1.4 and at large Reynolds numbers

Description: Report presenting base pressures measured on several fin-stabilized bodies of parabolic-arc profile in free flight at a range of Mach and Reynolds numbers. The bodies varied in length but had the same afterbody ratios. Results regarding base pressure coefficients, side pressure coefficients, effect of afterbody length, and drag are provided.
Date: October 26, 1951
Creator: Katz, Ellis & Stoney, William E., Jr.
Partner: UNT Libraries Government Documents Department
open access

A Spectrophotometric Determination of Multimicrogram Amounts of Plutonium

Description: A spectrophotometric method for the determination of plutonium wing sodium alizarin sulfonate has been developed. The red plutonium-alizarin sulfonate color is developed in solutions having a pH of about three in the presence of a formic acid-sodium formate buffer, and the resulting absorption is measured at 530 millimicrons. Most interfering cations, particularly iron(III), are removed from the plutonium solutions by means of electrolysis using a mercy cathode. Aluminum(III), in quantities up… more
Date: January 26, 1951
Creator: King, Glendall L.
Partner: UNT Libraries Government Documents Department
open access

Acenaphthene solvents for use in Building 313 Frost Test operation

Description: Acenaphtheno is a low-melting organic compound, C{sub 10}H{sub 6}(CH{sub 2}){sub 2}, used as a temperature indicating coating for slugs tested in the Frost Test induction coil. In preparation for this test, slugs are coated by spraying a 12 to 24 per cent by weight solution of acenaphthene in a high vapor pressure solvent on the rotating slug. The solvent evaporate leaving a thin, adherent coating of acenaphthene. This process is completely described in reference 1. To be entirely satisfactory … more
Date: June 26, 1951
Creator: Kratzer, W. K.
Partner: UNT Libraries Government Documents Department
open access

Effect of a deflectable wing-tip control on the low-speed lateral and longitudinal characteristics of a large-scale wing with the leading edge swept back 47.5 degrees

Description: Report presenting an investigation of the effect of a 20-percent-semispan deflectable wing-tip control on the low-speed lateral and longitudinal characteristics of a wing with the leading edge swept back 47.5 degrees, an aspect ratio of 3.5, and circular-arc-airfoil sections. The results indicate that the 20-percent-semispan wing-tip control should provide adequate lateral control over the angle-of-attack range investigated. Results regarding the effect of tip control on lateral characteristics… more
Date: April 26, 1951
Creator: Lange, Roy H. & Fink, Marvin P.
Partner: UNT Libraries Government Documents Department
Back to Top of Screen