Comparison of tests on experimental 15-inch metal spars and 11-foot chord metal wing ribs. Parts 1 and 2 (airplane section report)
Newell, J. S.
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DescriptionEarly in 1923 contracts were let for the design and construction of five types of experimental metal wing beams and seven types of wing ribs. Each type of spar and rib was tested under identically the same conditions as the other types, so that the test data would be truly compatible and afford a positive means of determining the merits of each type. The purpose of this report is to scrutinize the data collected during the tests for the purpose of rating the various spars and ribs as to their desirability for use in airplane wings, and if possible to develop means for analyzing and designing the various types of spars. In this report certain conclusions have been drawn as to the merits of the spars and ribs and methods are suggested for taking care of some of the more difficult points in the design of the metal spars, but it must be borne in mind that the data on which the conclusions and the methods of analysis are based are very meager, so that both may be revised if further tests are made and more data accumulated. The report is given in two parts, the first of which deals with the wing spars, the second with the wing ribs.
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