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  Partner: UNT Libraries Government Documents Department
 Collection: Technical Report Archive and Image Library
Spark ignition of flowing gases III : effect of turbulence promoter on energy required to ignite a propane-air mixture

Spark ignition of flowing gases III : effect of turbulence promoter on energy required to ignite a propane-air mixture

Date: January 14, 1953
Creator: Swett, Clyde C , Jr & Donlon, Richard H
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Spark ignition of flowing gases V : application of fuel-air-ratio and initial-temperature data to ignition theory

Spark ignition of flowing gases V : application of fuel-air-ratio and initial-temperature data to ignition theory

Date: November 1, 1955
Creator: Swett, Clyde C , Jr
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Spark plug defects and tests

Spark plug defects and tests

Date: January 1, 1920
Creator: Silsbee, F B; Loeb, L B; Sawyer, L G; Fonseca, E L; Dickinson, H C & Agnew, P G
Description: The successful operation of the spark plug depends to a large extent on the gas tightness of the plug. Part 1 of this report describes the method used for measuring the gas tightness of aviation spark plugs. Part 2 describes the methods used in testing the electrical conductivity of the insulation material when hot. Part 3 describes the testing of the cold dielectric strength of the insulation material, the resistance to mechanical shock, and the final engine test.
Contributing Partner: UNT Libraries Government Documents Department
Spark-Source Mass Spectrometric Analysis of Common and Radiogenic Lead

Spark-Source Mass Spectrometric Analysis of Common and Radiogenic Lead

Date: June 11, 1965
Creator: Franklin, John C.
Description: Analysis that is fast and has extremely low levels of detection for more than forty elements that may be present in lead.
Contributing Partner: UNT Libraries Government Documents Department
Spark-timing control based on correlation of maximum-economy spark timing, flame-front travel, and cylinder-pressure rise

Spark-timing control based on correlation of maximum-economy spark timing, flame-front travel, and cylinder-pressure rise

Date: January 1, 1947
Creator: Cook, Harvey A; Heinicke, Orville H & Haynie, William H
Description: An investigation was conducted on a full-scale air-cooled cylinder in order to establish an effective means of maintaining maximum-economy spark timing with varying engine operating conditions. Variable fuel-air-ratio runs were conducted in which relations were determined between the spark travel, and cylinder-pressure rise. An instrument for controlling spark timing was developed that automatically maintained maximum-economy spark timing with varying engine operating conditions. The instrument also indicated the occurrence of preignition.
Contributing Partner: UNT Libraries Government Documents Department
Spark-timing control based on correlation of maximum-economy spark timing, flame-front travel, and cylinder pressure rise

Spark-timing control based on correlation of maximum-economy spark timing, flame-front travel, and cylinder pressure rise

Date: February 1, 1947
Creator: Cook, Harvey A; Heinicke, Orville H & Haynie, William H
Description: None
Contributing Partner: UNT Libraries Government Documents Department
The sparking voltage of spark plugs

The sparking voltage of spark plugs

Date: January 1, 1925
Creator: Silsbee, F B
Description: This report has been prepared in order to collect and correlate into convenient and useful form the available data on this subject. The importance of the subject lies in the fact that it forms the common meeting ground for studies of the performance of spark generators and spark plugs on the one hand and of the internal combustion engines on the other hand. While much of the data presented was obtained from various earlier publications, numerous places were found where necessary data were lacking, and these have been provided by experiments in gasoline engines at the Bureau of Standards.
Contributing Partner: UNT Libraries Government Documents Department
Spartan "Cruiser" commercial airplane (British) : a six-seat low-wing cantilever monoplane

Spartan "Cruiser" commercial airplane (British) : a six-seat low-wing cantilever monoplane

Date: August 1, 1932
Creator: unknown
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Spatial buckling of various types of airplane strut systems

Spatial buckling of various types of airplane strut systems

Date: November 1, 1931
Creator: Teichmann, Alfred
Description: Equations are presented for two and three dimensional strut systems along with tables of equations.
Contributing Partner: UNT Libraries Government Documents Department
Spatial Burnout in Water Reactors with Nonuniform Startup Distributions of Uranium and Boron

Spatial Burnout in Water Reactors with Nonuniform Startup Distributions of Uranium and Boron

Date: March 23, 1955
Creator: Fox, Thomas A. & Bogart, Donald
Description: Spatial burnout calculations have been made of two types of water moderated cylindrical reactor using boron as a burnable poison to increase reactor life. Specific reactors studied were a version of the Submarine Advanced Reactor (sAR) and a supercritical water reactor (SCW) . Burnout characteristics such as reactivity excursion, neutron-flux and heat-generation distributions, and uranium and boron distributions have been determined for core lives corresponding to a burnup of approximately 7 kilograms of fully enriched uranium. All reactivity calculations have been based on the actual nonuniform distribution of absorbers existing during intervals of core life. Spatial burnout of uranium and boron and spatial build-up of fission products and equilibrium xenon have been- considered. Calculations were performed on the NACA nuclear reactor simulator using two-group diff'usion theory. The following reactor burnout characteristics have been demonstrated: 1. A significantly lower excursion in reactivity during core life may be obtained by nonuniform rather than uniform startup distribution of uranium. Results for SCW with uranium distributed to provide constant radial heat generation and a core life corresponding to a uranium burnup of 7 kilograms indicated a maximum excursion in reactivity of 2.5 percent. This compared to a maximum excursion of 4.2 percent obtained for ...
Contributing Partner: UNT Libraries Government Documents Department