Aviation engines; design--construction--operation and repair; (1919)
Pagé, Victor Wilfred, 1885-1947 · New York, The Norman W. Henley publishing co. · leaf 194
erials sometimes used are glass, K0( Slning of thelesi9n and Use 195 steatite (which i* A soapstone) and lava. Mica and porcelain are i- ^o common materials used becausethey give the best results. Glass is liable to crack, whilelava or the soapstone insulating bushings absorb oil.The spark gap of… … #8-32 \y4mm..75 p.) **■{ 25nfm.Across Flats 16.9 Threads per inch : 1.5 millimeters pitchRoot diameter 633 inch.: I6.09.mil/imetersPitch diameter 678± inch : 17.22+02millfmetersOutside diameter 7/7.inch •* 18.2 millimeters Fig. 73.—Standard Airplane Engine Plug Suggested by S. A. E. Standards…
Airplanes
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