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Identification of knock in NACA high-speed photographs of combustion in a spark-ignition engine

Description: Report presents the results of a study of combustion in a spark-ignition engine given in NACA Technical Reports 704 and 727. The present investigation was made with the NACA high-speed motion-picture camera, operating at 40,000 photographs a second, and with a cathode-ray oscillograph operating on a piezoelectric pick-up in the combustion chamber. Photographs are presented showing that the origin of knock is not necessarily in the end gas. The data obtained indicates that knock takes place only… more
Date: November 14, 1942
Creator: Miller, Cearcy D. & Olsen, H. Lowell
Partner: UNT Libraries Government Documents Department
open access

Establishing Site X: Letter, Arthur H. Compton to Enrico Fermi, September 14, 1942

Description: This letter from Compton to Fermi describes developments bearing on the establishment of ``site X`` (which, as of the letter date, is definitely determined as at the Tennessee Valley) for the construction of a pile and associated pilot plant buildings, describes the situation as of the letter date, and offers counsel as to how to proceed.
Date: September 14, 1942
Creator: Compton, A. H.
Partner: UNT Libraries Government Documents Department
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