Structural Analysis of Three Crash Impact Configurations in Steel Tube and Fabric Aircraft
AVIATION SAFETY ENGINEERING AND RESEARCH PHOENIX AZ
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This report covers the development of limited mathematical models to predict in qualitative terms the crashworthiness of a light airframe structure of the Piper J-3 type under three impact conditions. Two indices of crashworthiness were selected 1 the aircraft velocity required to cause structural collapse short of general cabin collapse, and 2 the maximum deceleration applied to the occupants during the crash. Engineering analysis and physical principles are applied to each appropriate mathematical model to develop the crashworthiness indices. Sample calculations were made for the Piper J-3 in three typical crash impact configurations nose impact, nose and wing impact, and impact on the landing gear considering only the vertical velocity component. The preliminary study reveals that the crashworthiness indices selected are potentially useful in evaluating structural modifications such as the eight items discussed.
- Military Aircraft Operations