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This paper presents the methodology employed to measure the T-46 nose landing gear shimmy parameters. In the course of the presentation, the experimental test set-up using the T-46 static test article is described, the parameters to be measured are defined, tables of force-deflection data are presented, the data reduction techniques are described, the final calculated values are given, and the experimental measurement of the torsional freeplay of the gear is discussed.

This paper reviews the current state-of-the-art in aircraft landing gear dynamics and presents recommendations for new areas of research in this field. The paper begins by reviewing some of the shortcomings the author has experienced in conducting shimmy investigations on various aircraft. Included in this review are the problems associated with obtaining both landing gear structural parameters and aircraft tire parameters. Some discussion is also made of the problems with current landing gear dynamics mathematical models. On the basis of all of these problems, recommendations are then made for future research. The main content of these recommendations are to develop three documents that will completely define a general landing gear dynamics mathematical/computer model that will be able to analyze the problems of gear walk, shimmy, dynamic response to rough runways, antiskid brake induced oscillations, tire-out-of-round, and wheel imbalance.