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STOPPING POWER AND ENERGY FOR ION PAIR PRODUCTION FOR 340 MEVPROTONS

Description: The relative stopping powers for 300 Mev protons of H, Li, Be, C, Al, Fe, Cu, Ag, Sn, W, Pb, and U have been measured. The results are shown in Table I. The energy spent per ion-pair production in the gases H{sub 2}, He, N{sub 2}, O{sub 2}, and A at 340 Mev proton energy has also been measured. The results are shown in Table II.
Date: August 3, 1950
Creator: Bakker, C.J. & Segre, E.
Partner: UNT Libraries Government Documents Department
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"25" Critically Consultation with J. W. Morfitt : April 3, 1950

Description: Summary: "Criticality was considered impossible in any contingency encountered in practice under either of the following conditions which include no safety factor: (a) In any isolated cylinder not more than 5 in. in disruptor, if the total amount of U235 present does not exceed 7.5 Eg. (b) In an isolated vessel of any shape and size, if the total amount of U235 present does not exceed 880 g. An "isolated" vessel is one which does not "see" more than 0.1 [...] other vessels containing fissionabl… more
Date: April 3, 1950
Creator: Merrill, E. T. & Sege, G.
Partner: UNT Libraries Government Documents Department
open access

Radioactive contamination in the environs of the Hanford Works for the period April, May, June 1949

Description: This report summarizes the measurements made for radioactive contamination in the environs of the Hanford Works for the quarter April through June 1949. This belated document is issued for the records to fill in the gap for the quarterly reports not issued in 1949 because of personnel shortage at that time. Although the data summarized in this report were already reported in the H. I. Evirons Reports for the months involved, it is still of value to study the data combining the three months of d… more
Date: April 3, 1950
Creator: Paas, H.J. & Singlevich, W.
Partner: UNT Libraries Government Documents Department
open access

Carbon Dioxide Fixation by Green Plants

Description: Since the end of the war when the long-lived isotope of carbon, C{sup 14} became available a new tool has been applied in the study of photosynthesis. Because of the interest evoked by the tracer method, research in all areas of photosynthesis has expanded. There have been reviews on various aspects of photosynthesis such as the primary photochemical reaction, quantum efficiency products, and comparative biochemistry, many discussions of which were included in the monograph of The American Soci… more
Date: January 3, 1950
Creator: Benson, A. A. & Calvin, M.
Partner: UNT Libraries Government Documents Department
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Effects of leading-edge radius and maximum thickness-chord ratio on the variation with Mach number of the aerodynamic characteristics of several thin NACA airfoil sections

Description: Report presenting a wind-tunnel investigation to determine the effects of leading-edge radius and maximum thickness-chord ratio on the variation with Mach number of the aerodynamic characteristics of several thin symmetrical NACA 4-digit-series airfoil sections. The variations with Mach number of the lift, drag, and pitching moment for a 4-percent-chord-thick airfoil section are not significantly affected by a change of leading-edge radius from 0.18 to 0.53 percent of the chord. Results regardi… more
Date: July 3, 1950
Creator: Berggren, Robert E. & Graham, Donald J.
Partner: UNT Libraries Government Documents Department
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An Investigation of a Supersonic Aircraft Configuration Having a Tapered Wing With Circular-Arc Sections and 40 Degree Sweepback: Static Longitudinal Stability and Control Characteristics at a Mach Number of 1.40

Description: Memorandum presenting an investigation conducted in the 4- by 4-foot supersonic tunnel to determine the longitudinal stability and control characteristics of a model of a supersonic airplane configuration at Mach number 1.40. The model had a 40 degree sweptback wing with 10-percent-thick circular-arc sections normal to the quarter-chord line. The results indicated a high degree of longitudinal stability that was fairly constant throughout the trim-lift-coefficient range.
Date: April 3, 1950
Creator: Spearman, M. Leroy
Partner: UNT Libraries Government Documents Department
open access

Correlation of laboratory smoke test with carbon deposition in turbojet combustors

Description: Report presenting a correlation of carbon deposition of 19 fuels in a turbojet combustor as a function of the boiling point and of the flame height at the sooting point of the fuels in a simple wick lamp for a particular combustor operating at a single set of conditions. Two similar investigations with different combustors, operating conditions, and nine different fuels yielded similar correlations on the same graph.
Date: February 3, 1950
Creator: Busch, Arthur M.
Partner: UNT Libraries Government Documents Department
open access

The effect of aspect ratio on the subsonic aerodynamic characteristics of wings with NACA 65(sub 1)-210 sections

Description: Report presenting the results of tests of four model wings of aspect ratios 1, 2, 4, and 6 and with NACA 65(sub 1)-210 sections. The experimental lift-curve slope is compared with predictions from theory. Results regarding lift, drag, and pitching moment, lift-curve slope, drag divergence, minimum drag, and pitching moment are provided.
Date: February 3, 1950
Creator: Nelson, Warren H. & Erickson, Albert L.
Partner: UNT Libraries Government Documents Department
open access

Altitude-wind-tunnel investigation of operational characteristics of J47 turbojet engine

Description: Report presenting an investigation in the altitude wind tunnel to determine the operational characteristics of a J47 turbojet engine over a wide range of simulated flight conditions at a range of altitudes. Operational characteristics investigated include operating range, starting, altitude and airspeed compensation of the fuel regulator, and acceleration.
Date: August 3, 1950
Creator: Bloomer, Harry E.
Partner: UNT Libraries Government Documents Department
open access

Fundamental flame velocities of pure hydrocarbons 2: alkadienes

Description: Data are presented for the fundamental flame velocities of 10 pure alkadienes that have isolated, conjugated, or cumulative double-bond systems. On the basis of this limited amount of data and the flame velocities previously reported, it is concluded that unsaturation changes the flame velocity in the order alkanes ? alkenes ? alkadienes with isolated double bonds ?= alkadienes with conjugated double bonds ? alkadienes with cumulative double bonds ?= alkynes. There were no significant differenc… more
Date: November 3, 1950
Creator: Levine, Oscar; Wong, Edgar L. & Gerstein, Melvin
Partner: UNT Libraries Government Documents Department
open access

Preliminary investigation of constant-geometry, variable Mach number, supersonic tunnel with porous walls

Description: Report presenting a method of generating variable Mach number supersonic flow in a channel of fixed geometry by the removal of air through uniform porous walls. Calculated porosity distributions are presented for several minimum-length nozzles designed to operate at Mach numbers up to 2.0. Experimental and analytical data is presented.
Date: May 3, 1950
Creator: Nelson, William J. & Klevatt, Paul L.
Partner: UNT Libraries Government Documents Department
open access

Experimental investigation of thrust augmentation of 4000-pound-thrust centrifugal-flow-type turbojet engine by bleedoff

Description: Report presenting an experimental investigation of thrust augmentation by bleedoff using a 4000-pound-thrust turbojet engine at zero flight-speed, sea-level conditions. Secondary combustion air was bled off from combustion chambers and discharged from an exhaust nozzle and water was then injected into the combustion chambers to replace the bleed-off air. Results regarding the thrust characteristics, engine power, and augmented thrust ratio are provided.
Date: July 3, 1950
Creator: Jones, William L. & Bogdan, Louis J.
Partner: UNT Libraries Government Documents Department
open access

Approximate relative-total-pressure losses of an infinite cascade of supersonic blades with finite leading-edge thickness

Description: From Summary: "By application of a hyperbolic approximation to the form of the bow waves caused by blunt leading edges on an infinite cascade of supersonic blades, the approximate losses in relative total pressure due to the external bow-wave system arising from blunt edges and subsonic axial entrance velocities were computed. The losses increase linearly with leading-edge radius for any given relative Mach number. For a relative Mach number of 1.60, leading-edge radii may be approximately 1.5 … more
Date: March 3, 1950
Creator: Klapproth, John F.
Partner: UNT Libraries Government Documents Department
open access

Effects of sweep on the maximum-lift characteristics of four aspect-ratio-4 wings at transonic speeds

Description: Report presenting an investigation at transonic speeds in the high-speed 7- by 10-foot tunnel to determine the effect of wing sweep on the maximum-lift characteristics of a series of wings with aspect ratio 4, taper ratio 0.6, and NACA 65A006 airfoil sections. Testing occurred over a range of Mach and Reynolds numbers. Maximum lift coefficients were found to increase with increased sweep at lower Mach numbers but decreased with increase sweep at higher Mach numbers.
Date: October 3, 1950
Creator: Turner, Thomas R.
Partner: UNT Libraries Government Documents Department
open access

Wing-flow measurements of longitudinal stability and control characteristics of a supersonic airplane configuration having a 42.8 degree sweptback circular arc wing with aspect ratio 4.0, taper ratio 0.50, and sweptback tail surfaces

Description: Report presenting the results of an investigation at transonic speeds by the wing-flow method of the longitudinal stability characteristics of a 42.8 degree sweptback supersonic airplane configuration. Lift, pitching-moment, and rolling-moment characteristics of the semispan model as well as stabilizer hinge moments and effective downwash at the tail were measured over a range of Mach numbers. The wing-flow data is compared to data for the same configuration from other research facilities.
Date: April 3, 1950
Creator: Crane, Harold L. & Adams, James J.
Partner: UNT Libraries Government Documents Department
open access

Effect of inlet temperature and humidity on thrust augmentation of turbojet engine by compressor-inlet injection

Description: Report presenting an investigation at conditions of zero ram and seal-level pressure to determine the effect of inlet temperature and humidity on turbojet engine performance with injection of water and water-alcohol mixtures at the compressor inlet.
Date: July 3, 1950
Creator: Shillito, Thomas B. & Harp, James L., Jr.
Partner: UNT Libraries Government Documents Department
open access

Altitude-Chamber Performance of British Roll-Royce Nene II Engine 4: Effect of Operational Variables on Temperature Distribution at Combustion-Chamber Outlets

Description: "Temperature surveys were made at the combustion-chamber outlets of a British Rolls-Royce Nene II engine. The highest mean nozzle-vane and mean gas temperatures were found to occur at a radius approximately 75% of the nozzle-vane length from the inner ring of the nozzle-vane assembly. Variations in engine speed, jet-nozzle area, simulated altitude, and simulated flight speed altered the temperature level but did not materially affect the pattern of radial temperature distribution" (p. 1).
Date: July 3, 1950
Creator: Huntley, Sidney C.
Partner: UNT Libraries Government Documents Department
open access

Comparison between theory and experiment for wings at supersonic speeds

Description: This paper presents a critical comparison made between experimental and theoretical results for the aerodynamic characteristics of wings at supersonic flight speeds. As a preliminary, a brief, nonmathematical review is given of the basic assumptions and general findings of supersonic wing theory in two and three dimensions. Published data from two-dimensional pressure-distribution tests are then used to illustrate the effects of fluid viscosity and to assess the accuracy of linear theory as com… more
Date: May 3, 1950
Creator: Vincenti, Walter G.
Partner: UNT Libraries Government Documents Department
open access

Laboratory Survey of Deoxidants for Uranium Chips

Description: Summary: "Six different types of solutions of various concentrations were used to deoxidize uranium chips on a laboratory scale. None of the solutions tested appears to be more desirable than 50% nitric acid for deoxidizing uranium chip on a production scale."
Date: August 3, 1950
Creator: Kattner, W. T.
Partner: UNT Libraries Government Documents Department
open access

Number of effective tubes in the ``G`` pile

Description: The method for calculating relative heat generation as a function of radius of an equivalent ``G`` type cylindrical pile for specified inhours of ideal flattening is given in INDC-3833. The report has been extended to include flattening curves for the range of zero to 800 inhours. Equations have been integrated to determine average relative power per tube for a fixed amount of flattening. Average relative power per tube, number of effective tubes, kw per effective tube, and maximum temperature … more
Date: April 3, 1950
Creator: Sege, C. A.
Partner: UNT Libraries Government Documents Department
open access

Part A. An X-ray Spectrometer for Use in Radioactivity Measurements, the L X-rays of Neptunium and Plutonium. Part B. Some Lighter Isotopes of Astatine

Description: The following report contains two parts on the analysis of astatine, neptunium and plutonium. Part A discusses a bent crystal focusing X-ray spectrometer that has been designed and built for the observation of the X-and gamma-rays emitted in association with radioactive decay. The instrument uses proportional counter detection and is described, as well as associated electronic circuits. The plutonium L X-rays from Cm-242 and the neptunium L X-rays from Am-241 have been measures. Values of the e… more
Date: May 3, 1950
Creator: Barton, George Wendell
Partner: UNT Libraries Government Documents Department
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