Uniformity Of Output From A Low-Amplitude Plane-Wave Nitroguanidine Explosive System (open access)

Uniformity Of Output From A Low-Amplitude Plane-Wave Nitroguanidine Explosive System

In the Plowshare Program many calculations of the effects of underground explosions are made. Usually these are done on high-speed digital computers. The effects are calculated for ranges up to hundreds of meters from the explosion; at these ranges pressures become less than one kilobar. In order to make these calculations, information about the properties of the materials involved is required. Benedick [13] has developed a low-pressure, plane-wave lens using nitroguanidine. It was decided to use a similar lens in the Plowshare Program. A number of lenses were built using Benedick's technique. This report is of a study of simultaneity and pressure uniformity of these lenses, with some attempts at development of a reflection pressure vs particle velocity curve for them.
Date: May 12, 1964
Creator: Hearst, Joseph R. & Geesaman, L. B.
System: The UNT Digital Library
Photodisintegration Cross Section of Beryllium Near Threshold (open access)

Photodisintegration Cross Section of Beryllium Near Threshold

Abstract. The cross section of photoneutron production in Be9 at energies of 1.692, 1.720, and 1.78 Mev has been investigated using radioisotope gamma-ray sources. Neutron counting was by manganous sulfate bathe and a long counter. Gamma-ray counting was by a scintillation spectrometer consisting of a NaI(T1) scintillation crystal and a 256 channel pulse-height analyzer. A theoretical treatment of the P [right arrow] S transition near threshold using square-well potentials is also presented.
Date: May 12, 1960
Creator: Prosser, John M. & John, Walter, Jr.
System: The UNT Digital Library
Plutonium Oxide- Plastic Mixtures for Critical Mass Studies (open access)

Plutonium Oxide- Plastic Mixtures for Critical Mass Studies

Critical mass experiments to be conducted at HAPO will require dilute and concentrated plutonium solutions. Since very high plutonium concentrations (~2,000 g/l) cannot be attained in pumpable solutions, solid plutonium compounds will be utilized for this phase of the work. Mixtures of plutonium oxide and polyethylene, methyl methacrylate or paraffin compacted in containers have been considers for use in highly-concentrated plutonium systems of known hydrogen to plutonium atomic ratio (H/Pu).
Date: May 12, 1960
Creator: Crocker, H. W.
System: The UNT Digital Library
Design Criteria of a Consumable Electrode Welder for Water Mixing Fuel Elements (open access)

Design Criteria of a Consumable Electrode Welder for Water Mixing Fuel Elements

During the period when the writer mixing fuel element was being evaluated, a small Litton glass lathe and a General Electric Fillerarc welder were used to weld the mixing spool to the fuel element. Due to the condition of these units and to the numerous difficulties encountered with them, it was deemed necessary to design and procure a semi automatic welding unit which could weld in excess of three hundred fuel elements per day.
Date: May 12, 1959
Creator: Hanson. G. R.
System: The UNT Digital Library
An Acceleration Schedule Control for Accelerating a Turbojet Engine and Its Use With a Speed Control (open access)

An Acceleration Schedule Control for Accelerating a Turbojet Engine and Its Use With a Speed Control

Memorandum presenting a study of an acceleration-limiting control on a turbojet engine in order to determine its feasibility as an acceleration control. A proportional-plus-integral type of controller was used in the investigation. Results regarding the one-loop control and two-loop control are provided.
Date: May 12, 1958
Creator: Gerus, Theodore F.; Powers, Albert G. & Heppler, Herbert J.
System: The UNT Digital Library
An Acceleration Schedule Control for Accelerating a Turbojet Engine and Its Use With a Speed Control (open access)

An Acceleration Schedule Control for Accelerating a Turbojet Engine and Its Use With a Speed Control

Memorandum presenting an acceleration-limiting control used on a turbojet engine to study the feasibility of its use as an acceleration control. A proportional-plus-integral type of controller was used in this investigation. Results regarding one-loop control and two-loop control are provided.
Date: May 12, 1958
Creator: Gerus, Theodore F.; Powers, Albert G. & Heppler, Herbert J.
System: The UNT Digital Library
High Mach Number, Low-Cowl-Drag, External-Compression Inlet With Subsonic Dump Diffuser (open access)

High Mach Number, Low-Cowl-Drag, External-Compression Inlet With Subsonic Dump Diffuser

Low cowl drag, external compression inlet with subsonic dump diffuser for high Mach number application.
Date: May 12, 1958
Creator: Connors, James F. & Flaherty, Richard J.
System: The UNT Digital Library
High Mach Number, Low-Cowl-Drag, External-Compression Inlet With Subsonic Dump Diffuser (open access)

High Mach Number, Low-Cowl-Drag, External-Compression Inlet With Subsonic Dump Diffuser

Report presenting an investigation of a zero-cowl-drag, all-external-compression inlet with an abrupt area discontinuity or subsonic dump diffuser for high Mach number application. Results regarding the diffuser performance characteristics, effect of spike retraction, a comparison with other inlets, and some theoretical calculations related to the results are provided.
Date: May 12, 1958
Creator: Connors, James F. & Flaherty, Richard J.
System: The UNT Digital Library
Preliminary survey of possible methods for hypersonic aircraft (open access)

Preliminary survey of possible methods for hypersonic aircraft

Report presenting an investigation conducted to determine the relative advantages and limitations of a number of fluids for use as either heat sinks or coolants for hypersonic aircraft. The feasibility of the fluids tested as heat sinks and cooling in the high-level and low-level regions is described.
Date: May 12, 1958
Creator: Esgar, Jack B.; Hickel, Robert O. & Stepka, Francis S.
System: The UNT Digital Library
Theoretical Performance of Liquid Ammonia With Liquid Oxygen as a Rocket Propellant (open access)

Theoretical Performance of Liquid Ammonia With Liquid Oxygen as a Rocket Propellant

Memorandum presenting theoretical rocket performance for both equilibrium and frozen composition during expansion, which was calculated for the propellant combination of liquid ammonia with liquid oxygen at two chamber pressures and a wide range of pressure ratios and oxidant-fuel ratios. Some of the performance parameters explored include specific impulse, specific impulse in vacuum, combustion-chamber temperature, nozzle-exit temperature, molecular weight, molecular-weight derivatives, characteristic velocity, coefficient of thrust, ratio of nozzle-exit area to throat area, specific heat at constant pressure, isentropic exponent, viscosity, thermal conductivity, Mach number, and equilibrium gas compositions.
Date: May 12, 1958
Creator: Gordon, Sanford & Glueck, Alan R.
System: The UNT Digital Library
Neutron Production in the Pinch Due to Instability Breakup (open access)

Neutron Production in the Pinch Due to Instability Breakup

Abstract: "The neutrons from the linear pinch in Berkeley have been shown to originate from deuteron collisions with a large net center-of-mass velocity in one direction along the axis of the pinch tube. The interpretation of this result is that the neutron production associated with the pinch is non-thermonuclear in origin. The object of this paper is to review the experimental evidence and discuss a possible source of the neutron production."
Date: May 12, 1956
Creator: Colgate, Stirling A.
System: The UNT Digital Library
Extrapolation techniques applied to matrix methods in neutron diffusion problems (open access)

Extrapolation techniques applied to matrix methods in neutron diffusion problems

"A general matrix method is developed for the solution of characteristic-value problems of the type arising in many physical applications. The scheme employed is essentially that of Gauss and Seidel with appropriate modifications needed to make it applicable to characteristic-value problems. An iterative procedure produces a sequence of estimates to the answer; and extrapolation techniques, based upon previous behavior of iterants, are utilized in speeding convergence. Theoretically sound limits are placed on the magnitude of the extrapolation that may be tolerated" (p. 747).
Date: May 12, 1955
Creator: McCready, Robert R.
System: The UNT Digital Library
Flight Tests of a 0.13-Scale Model of the Convair XFY-1 Vertically Rising Airplane with the Lower Vertical Tail Removed, TED No. DE 368 (open access)

Flight Tests of a 0.13-Scale Model of the Convair XFY-1 Vertically Rising Airplane with the Lower Vertical Tail Removed, TED No. DE 368

"An experimental investigation has been conducted to determine the dynamic stability and control characteristics in hovering and transition flight of a 0.13-scale flying model of the Convair XFY-1 vertically rising airplane with the lower vertical tail removed. The purpose of the tests was to obtain a general indication of the behavior of a vertically rising airplane of the same general type as the XFY-1 but without a lower vertical tail in order to simplify power-off belly landings in an emergency. The model was flown satisfactorily in hovering flight and in the transition from hovering to normal unstalled forward flight (angle of attack approximately 30deg)" (p. 1).
Date: May 12, 1954
Creator: Lovell, Powell M., Jr.
System: The UNT Digital Library
The Metabolism of Chyle Cholesterol in the Rat (open access)

The Metabolism of Chyle Cholesterol in the Rat

Abstract: "Observations on the metabolism of chyle cholesterol in the rat show that exogenous cholesterol entering the systemic circulation in chyle exists in lipoproteins of low density (including chylomicrons) migrating with a high Sf rate (i.e.>400) in the ultracentrifuge. Following entry into the systemic circulation these molecules are rapidly removed from the plasma. This "clearing" of serum chyle cholesterol is a tissue phenomenon, the liver being the predominant site. Within the liver the chyle cholesterol esters are at least partially hydrolyzed; hydrolysis apparently does not occur in the plasma to any appreciable extent. After its entry into the liver exogenous cholesterol, if normally metabolized, presumably mixes with and becomes indistinguishable from cholesterol produced by endogenous synthesis."
Date: May 12, 1954
Creator: Biggs, Max William & Nichols, Alexander V.
System: The UNT Digital Library
Chemical Engineering Division Summary Report : January, February, And March 1953 (open access)

Chemical Engineering Division Summary Report : January, February, And March 1953

Dissolution of the large number of samples obtained from the natural uranium blanket of the Experimental Breeder Reactor after approximately 485,000 kw.-hr. of operation has been completed, and analysis of these samples for uranium consumed and plutonium formed is well along. An attempt is being made to distinguish quantitatively between uranium-238 and uranium-235 fission in the blanket area by determining the ratio of ruthenium-106 to cesium-137 in the fission products.
Date: May 12, 1953
Creator: Lawroski, Stephen & Stevenson, C. E.
System: The UNT Digital Library
Energy Per Fission and Power of the Bulk Shielding Reactor (open access)

Energy Per Fission and Power of the Bulk Shielding Reactor

Due to some lack of knowledge of the energy per fission, there has been some uncertainty over the absolute power of the Bulk Shielding Reactor. This report analyzes measurements to state the absolute power of the BSR within a few percent.
Date: May 12, 1953
Creator: Meen, J. L.; Johnson, E. B. & Hungerford, H. E.
System: The UNT Digital Library
The Furnace Spectrum of Plutonium (open access)

The Furnace Spectrum of Plutonium

Abstract: "The spectrum of plutonium has been observed over the temperature range of 2000 to 2600 C and a wavelength coverage of 3476 to 6888 A. The spectrum was excited in a modified King furnace."
Date: May 12, 1953
Creator: Conway, John G.
System: The UNT Digital Library
Calibration of AWS instrument shelter in Langley 300 MPH 7- by 10-foot tunnel (open access)

Calibration of AWS instrument shelter in Langley 300 MPH 7- by 10-foot tunnel

From Summary: "Tests and calibrations of an AWS instrument shelter were made in the Langley 300 MPH 7- by 10-foot tunnel for the Signal Corps, U.S. Army. The behavior of the wind vane, the 3-cup anemometer, and the shelter cover was determined in wind speeds up to 150 miles per hour. It was discovered that the rotational speed of the anenometer was greatly influenced by the location, with respect to the wind direction, of three spacer posts that held two upper bays of instruments above the anenometer."
Date: May 12, 1952
Creator: McKee, John W.
System: The UNT Digital Library
Further Studies on Control of the Converter Reactor (open access)

Further Studies on Control of the Converter Reactor

Introduction: "This report is an extension of NAA-SR-Memo-178. The results show the number of control rods as a function of the amount of reactivity to be controlled. Numerical solutions are given for a typical example and are readily obtainable for other cases."
Date: May 12, 1952
Creator: Robinson, L. B.
System: The UNT Digital Library
Preliminary Leaching Investigation of Babrosco and Afrikander Lease Residues (open access)

Preliminary Leaching Investigation of Babrosco and Afrikander Lease Residues

Leaching and filtration tests were conducted on dump samples and current residues from Afrikander Lease and Babrosco properties on the Witwatersrand, South Africa.
Date: May 12, 1952
Creator: Hollis, R. F. & Lynch, J. T.
System: The UNT Digital Library
Flight Investigation of Longitudinal Stability and Control Characteristics and Stalling Characteristics of a C-54D Airplane (open access)

Flight Investigation of Longitudinal Stability and Control Characteristics and Stalling Characteristics of a C-54D Airplane

Report presenting the flying qualities of a C-54D airplane measured as a preliminary to an investigation to determine the necessity of additions or revisions to flying-quality requirements in view of the problems associated with making instrument approaches to low altitudes. Results regarding control friction, dynamic longitudinal stability, static longitudinal stability, maneuvering stability, take-off and landing characteristics, effectiveness of the trim tabs, trim changes, and stalling characteristics are provided.
Date: May 12, 1950
Creator: Talmage, Donald B.; Reeder, John P. & Matthews, Ruth G.
System: The UNT Digital Library
High-Speed Wind-Tunnel Tests of a 1/16-Scale Model of the D-558 Research Airplane Basic Longitudinal Stability of the D-558-1 (open access)

High-Speed Wind-Tunnel Tests of a 1/16-Scale Model of the D-558 Research Airplane Basic Longitudinal Stability of the D-558-1

Report presenting the results of testing on a model of the D-558-1 in order to determine its pitching-moment, lift, and drag characteristics with no nose-inlet flow, and with the tail removed and at a constant setting. Only a limited analysis is provided.
Date: May 12, 1948
Creator: Wright, John B.
System: The UNT Digital Library
The Neutron Energy Distribution in the Center of the Los Alamos Plutonium Reactor (open access)

The Neutron Energy Distribution in the Center of the Los Alamos Plutonium Reactor

The following report examines the fission counter, fission plates and activation results of the neutron energy distribution in the center of the Los Alamos plutonium reactor.
Date: May 12, 1948
Creator: Hall, Jane H.; Hall, David B.; Spano, Alfred; Williams, Clarke & Griffin, David L.
System: The UNT Digital Library
Preliminary Investigation of Two Full-Scale Propellers to Determine the Effect of Swept-Back Blade Tips on Propeller Aerodynamic Characteristics (open access)

Preliminary Investigation of Two Full-Scale Propellers to Determine the Effect of Swept-Back Blade Tips on Propeller Aerodynamic Characteristics

Report presenting an investigation of two 10-foot-diameter three-blade propellers to determine the effect of swept-back blade tips on propeller aerodynamic characteristics. Results regarding the effect of swept-back tips on maximum efficiency and constant-power propeller operation are provided.
Date: May 12, 1947
Creator: Evans, Albert J. & Klunker, E. Bernard
System: The UNT Digital Library