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N-17, A Delayed Neutron Emitter

Description: The decay scheme of a 4.2 second neutron emitter has been investigated in detail. Chemical and physical evidence shows that it is N{sup 17}, which emits beta rays to a broad excited state of O{sup 17}, which then breaks up into a neutron plus O{sup 16}. The energy spectrum of the neutrons is determined by measuring the energies of the O{sup 16} recoils in a proportional counter. The neutrons have a most probable energy of 0.9 Mev, a 'half width' of less than .5 Mev, and an upper limit of about … more
Date: November 5, 1948
Creator: Alvarez, L. W.
Item Type: Refine your search to only Report
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The Activity Coefficient of Plutonium(IV) Salts in Acidic Solutions

Description: Summary: The activity coefficient of Pu(Cl04)4 was measured in perchloric acid solutions. The procedure used was to measure the extraction of the neutral plutonium(IV)-TTA chelate into benzene-TTA solutions at different perchloric acid concentrations. Equations are presented which show the relation of the extraction coefficients, obtained in the above manner, to the activity coefficient of plutonium(IV) per-chlorate. The activity coefficient of Pu(Cl0~)4 is similar to that of a strong acid, e.… more
Date: November 1948
Creator: Connick, R. E. & Reas, W. H.
Item Type: Refine your search to only Report
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Activity of fission products

Description: This report compares the activity and disintegration energy of fission products from metal under two conditions of exposure: 200 Megawatt-days integrated exposure over a period of 180 days, and 400 Megawatt-days integrated exposure over a period of 360 days. (JL)
Date: November 11, 1948
Creator: Garbrecht, M. & Gillette, P. R.
Item Type: Refine your search to only Report
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Additional free-flight tests of the rolling effectiveness of several wing-spoiler arrangements at high subsonic, transonic, and supersonic speeds

Description: From Introduction: "The purpose of the present paper is to present results obtained recently relating to the characteristics of a full-span sharp-edge spoiler with an 0.02-chord projection above the wing surface at several chordwise positions and also to the relative effectiveness of the sharp-edge spoiler and a wedge-type spoiler located at the 80-percent-chord line."
Date: November 24, 1948
Creator: Strass, H. Kurt
Item Type: Refine your search to only Report
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Aerodynamic characteristics at subsonic and supersonic Mach numbers of a thin triangular wing of aspect ratio 2 1: maximum thickness at 20 percent of the chord

Description: From Summary: "This report presents the results of a wind-tunnel investigation conducted to determine the effects of Mach number on the aerodynamic characteristics of a wing of triangular plan form."
Date: November 19, 1948
Creator: Berggren, Robert E. & Summers, James L.
Item Type: Refine your search to only Report
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Altitude-wind-tunnel investigation of operational characteristics of Westinghouse X24C-4B axial flow turbojet engine

Description: From Summary: "An investigation has been conducted in the NACA Cleveland altitude wind tunnel to evaluate the operational characteristics of a 3000-pound-thrust axial-flow turbojet engine over a range of simulated altitudes from 2000 to 50,000 feet and simulated flight Mach numbers from 0 to 1.04 throughout the operable range of engine speeds. Operational characteristics investigated include engine operating range, acceleration, deceleration, starting, altitude and flight-Mach-number compensati… more
Date: November 23, 1948
Creator: Hawkins, W. Kent & Meyer, Carl L.
Item Type: Refine your search to only Report
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Altitude-Wind-Tunnel Investigation of Westinghouse 19B-2 19B-8, and 19XB-1 Jet-Propulsion Engines, Part 1, Operational Characteristics

Description: From Summary: "An investigation was conducted in the NACA Cleveland altitude wind tunnel to determine the operational characteristics of the Westinghouse 19B-2, 19B-8, and 19XB-l jet-propulsion engines. The 19B engine is one of the earliest experimental Westinghouse axial flow engines. The 19XB-1 engine is an experimental prototype of the Westinghouse 15 series, having a rated thrust of 1400 pounds. Improvements in performance and operational characteristics have resulted in the 19XB-2B engine … more
Date: November 22, 1948
Creator: Fleming, William A.
Item Type: Refine your search to only Report
open access

Analysis for C{sup 14} and S{sup 35} in urine

Description: On June 1, 1948, a fire in the neoprene seal at 100-F Area potentially exposed nine to radioactive. An overnight collection of urine was made from these men and the samples submitted, along with a piece of neoprene seal, to the H.I. Development Laboratory for analysis. It is the purpose of this report to present the results of our investigation as to the type of contamination from the burning neoprene and the amount of contamination found in the urine sample.
Date: November 18, 1948
Creator: Thornburn, R. C.
Item Type: Refine your search to only Report
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Analysis of Effects of Inlet Pressure Losses on Performance of Axial-Flow Type Turbojet Engine

Description: From Introduction: "An analytical evaluation of the effects of inlet losses on the net thrust and the fuel economy of an axial-flow-compressor type turbojet engine with a two-stage turbine is presented herein. The analysis is based on engine performance characteristics that were determined from experiments in the NACA Cleveland altitude wind tunnel (references 1 and 2). The experimental investigation did not include tests in which inlet losses were systematically varied, but the effects of thes… more
Date: November 24, 1948
Creator: Sanders, Newell D. & Palasics, John
Item Type: Refine your search to only Report
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An analysis of the airspeed and normal accelerations of Douglas DC-2 airplanes in commercial transport operation

Description: From Introduction: "This paper summarizes the results of an analysis of V-G records taken on Douglas DC-2 airplanes during the period from June 1935 to December 1940. The operational life is compared with the operational lives of other airplanes flown on different routes during the corresponding period."
Date: November 1948
Creator: Walker, Walter G.
Item Type: Refine your search to only Report
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Analysis of urine samples for iron and S{sup 35}

Description: On August 21, 1948, several smear samples of contamination from the inner rod room at 100-F Area were submitted for beta identification. This contamination was spread as a result of maintenance work on the horizontal rods. Urine sample were deemed advisable for two men who had been exposed while working on the rods. These urine samples were also submitted for beta analyses. The analyses of the smears showed the contamination to consist of primarily S{sup 35} (65%) and Fe{sup 59} (30%)and minor … more
Date: November 23, 1948
Creator: Thornburn, R. C.
Item Type: Refine your search to only Report
open access

Automotive Antifreezes

Description: From abstract: "A report on when antifreeze should be installed, what strength should be used, and what kind of antifreeze is best suited to the service involved."
Date: November 10, 1948
Creator: Brooks, Donald B. & Streets, Ronald E.
Item Type: Refine your search to only Report
open access

Berkeley Proton Linear Accelerator

Description: Construction of a linear accelerator which increases the energy of protons from a 4 Mev Van de Graaff injector to a final energy of 31.5 Mev.
Date: November 30, 1948
Creator: Alvarez, Luis W.; Bradner, Hugh; Gordon, Hayden; Panofsky, Wolfgang K. H.; Richman, Chaim & Woodyard, John R.
Item Type: Refine your search to only Report
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Biology Seminar : methods of assaying for plutonium in biological materials

Description: From introduction: "Since plutonium is manufactured at the Hanford Works, a study of its effect on biological materials is important. To determine the amount of plutonium deposited in a biological sample, it is necessary to have an accurate method for extracting plutonium from these samples. Some of the different methods for plutonium assay are reviewed and given in this paper."
Date: November 1948
Creator: Case, A. C.
Item Type: Refine your search to only Report
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Buckling of a Long Square Tube in Torsion and Compression

Description: "The buckling of an infinitely long square tube under combined torsion and compression is investigated by means of an exact energy method utilizing Lagrangian multipliers. An interaction curve is obtained from which it is possible to determine the amount of one loading required to produce buckling when a given amount of the other loading is present" (p. 1).
Date: November 1948
Creator: Budiansky, Bernard; Stein, Manuel & Gilbert, Arthur C.
Item Type: Refine your search to only Report
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Buckling Tests of Flat Rectangular Plates Under Combined Shear and Longitudinal Compression

Description: Note presenting an experimental investigation made to validate a theoretical parabolic interaction curve for the elastic buckling of flat rectangular plates under combined shear and longitudinal compression loads. The four flat rectangular plates tested formed the sides of a square box with corner angles.
Date: November 1948
Creator: Peters, Roger W.
Item Type: Refine your search to only Report
open access

The calculation of downwash behind supersonic wings with an application to triangular plan forms

Description: A method is developed consistent with the assumptions of small perturbation theory which provides a means of determining the downwash behind a wing in supersonic flow for a known load distribution. The analysis is based upon the use of supersonic doublets which are distributed over the plan form and wake of the wing in a manner determined from the wing loading. The equivalence in subsonic and supersonic flow of the downwash at infinity corresponding to a given load distribution is proved.
Date: November 9, 1948
Creator: Lomax, Harvard; Sluder, Loma & Heaslet, Max A.
Item Type: Refine your search to only Report
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Calculation of Tunnel-Induced Upwash Velocities for Swept and Yawed Wings

Description: Report presenting a study of tunnel-induced upwash field for a point element of lift in a rectangular tunnel, which is shown to consist of three superimposed fields that, except for relative position, are independent of the lateral or longitudinal location of the lift element in the tunnel. A contour chart is given of the first field. For tunnels that are not rectangular, the corresponding procedure requires the preparation of a chart for each of several spanwise locations of the lifting elemen… more
Date: November 1948
Creator: Katzoff, S. & Hannah, Margery E.
Item Type: Refine your search to only Report
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Calorimetry research progress report

Description: This document is a November 1948 Calorimetry Research Progress Report from the Mound Laboratory. Updates are given in the following areas: (1) development of micro and macrocalorimeters of the resistance-bridge type, (2) study and design of a rod calorimeter, (3) half-life of Postum, (4) evaluation of various calorimeter types, (5) applied mathematics, (6) materials, and (7) future efforts.
Date: November 1, 1948
Creator: Haring, M. M.
Item Type: Refine your search to only Report
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Charts of Compressibility Factors and Charts Showing Quantities Delivered by Commercial Cylinders for Hydrogen, Nitrogen, and Oxygen

Description: Two charts are given for each of the gases hydrogen, nitrogen, and oxygen. The first gives directly the number of standard cubic feet of the gas which a cylinder will deliver. The second chart gives values of the compressibility factor and of the density.
Date: November 17, 1948
Creator: Hoge, Harold J.; Meyers, Cyril H. & McCoskey, Robert E.
Item Type: Refine your search to only Report
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Control requirements and control parameters for a ram jet with variable-area exhaust nozzle

Description: Report presenting control requirements and parameters for a ram jet with a variable-area exhaust nozzle, which have been analyzed from calculated performance charts covering flight Mach numbers from 0.6 to 3.0 and altitudes from sea level to 30,000 feet. Requirements for maximum efficiency, safe and stable operation, maximum range of thrust at a given flight Mach number, and control of fuel flow are discussed and control parameters are selected.
Date: November 17, 1948
Creator: Boksenbom, Aaron S. & Novik, David
Item Type: Refine your search to only Report
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