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.
Date: January 1, 1920
Creator: Silsbee, F B; Loeb, L B; Sawyer, L G; Fonseca, E L; Dickinson, H C & Agnew, P G
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