In the early 1900's, the American Machinist Magazine published an article titled "Determining Design Constants from Practice'. This article proposed that design parameters for many devices could be determined by sampling, and averaging the parameters used by contemporary manufacturers of such devices. Then in it 1904 it published an article titled "Gas Engine Design Constants and Formula" This article, as well as many others, has been re-published by the famous house, LINDSAY PUBPILCTIONS INC,. in their publication titled Selected Articles from American Machinist Magazine January-June 1904. This article can be viewed via the links below.
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