This paper discusses experimental data collected by the Naval Air Systems Command (NAVAIR) during dynamic qualification testing of five individual crashworthy passenger seats designed and produced by three different manufacturers for use in forward, aft and side facing applications in U.S. Navy, Marine Corps and Air Force rotary wing aircraft platforms. This data is comprised of seat fitting reaction loads measured during the dynamic qualification testing of each of these seats. The loads are drawn upon to reinforce known facts, substantiate general assumptions and refute common misconceptions regarding the affects on the airframe resulting from the performance of energy attenuating seat systems under dynamic crash loading conditions. The collected airframe reaction loads are examined and dynamic overshoot factors (DOFs) for each of the aircraft loading directions are presented and discussed. Reaction loads measured on structural variations of similar seats are evaluated and conclusions are drawn regarding the plausibility of qualification of future modifications by similarity to previous designs. Multiple seat installations are evaluated for measured reaction loads and effect of occupant positioning on the dynamic test fixture. NAVAIR static strength requirements for integration of crashworthy seats are compared to the measured reaction loads and recommendations are made regarding adjustments to NAVAIR's structural design crash load factors to bridge the gap between static and dynamic criteria and facilitate application of the requirements to future rotary wing airframe design.
A contemporary survey of the structural performance standards for rotary wing aircraft crashworthy passenger seating
2006
25 Seiten, 16 Quellen
Aufsatz (Konferenz)
Englisch
British Library Conference Proceedings | 2006
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