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- W842431821 abstract "NACA EM L55E1Ob NATIONAL ADVISORY COMMITTEE FOR AERONAUTICS RESEARCH MEMORANDUM EXPERIMENTAL ANALYSIS OF MULTICELL WINGS BY MEANS OF PLASTIC MODELSBy George W. Zender SUMMARY The stresses and deflections of a plastic model of a delta multicell wing are presented and compared with theoretical results obtained by the use of the Cal-Tech analog computer. The comparison indicates that valu-able information may be obtained for experimental structural analyses from tests of plastic models.INTRODUCTION The problems associated with low aspect ratio and high sweep have introduced difficulties which require extensive theoretical analyses and the use of intricate automatic computing machines in the structural analysis of aircraft wings. Such complications introduce considerable theoretical uncertainty and increase the demands for experimental eval-uation of the structure. A method of experimental analysis which has been useful in the past involves the testing of scaled models made of plastic. Such a method has been used by Redshaw and Palmer (ref. 1) to obtain results directly applicable to a full-scale aircraft, whereas other investigators have obtained information useful in the analysis of various components of the structure. Nevertheless, the plastic-model approach is often rejected because of the peculiar properties of the plastic material. The National Advisory Committee for Aeronautics has made some tests using plastic models, and it is the purpose of this paper to show the methods which were employed to account for the pecu-liarities of the material and to present some of the results which have been obtained.DISCUSSION OF TECHNIQUES Considerable inforznatiQn on the properties of thermoplastic materials has been published by manufacturers. In general, such data indicate that for experimental purposes the temperature should be relatively low and closely controlled, and the humidity should be maintained reasonably" @default.
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- W842431821 date "1955-06-21" @default.
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- W842431821 title "Experimental analysis of multicell wings by means of plastic models" @default.
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