THE CONDITION of the only physical engine available for study and the data readily available can form the basis for only a very meager report. The study has, however, been an interesting one and the results are recorded for what value they may have. The design comments are, of necessity, of a general nature — much the same as those which would be made on the preliminary layout of a new design. For the convenience of many of us who habitually think in term s of English units, these units are used even though a large portion of the work is apparently based on the
conversion figures in the hope that these figures will best serve the purposes intended.
The inspection indicates to the writer two possible conclusions which are presented herewith:
1. That the group responsible for the design did a very ingenious job of combining what they apparently believed to be the most desirable features of a number of products of foreign manufacture — proved features all. These features are built into a composite design of the sort that “has to work the first time” — and probably did.
2. That manufacturing methods and equipment of manufacturers whose features were appropriated
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General description of the engine
appeared in “A viation' s”report on the joint meeting of the Society of Automotive Engineering Detroit Section, and the Engineering Society of Detroit, June 8, 1942, in the article War Production of Aircraft, page 104, July, 1942. This additional material is presented through the courtesy of the SAE.