AVIATION SAFETY ENGINEERING AND RESEARCH PHOENIX AZ
Strength requirements set forth in military specifications governing the design and fabrication of troop seats currently utilized in Army aircraft were analyzed. The analysis was made in light of accident experience with this seat, human tolerance as presently known, and accelerations and forces which may be anticipated in potentially survivable accidents. The analysis revealed that the strength requirements quoted in current military specifications are considerably lower than those which would be dictated by the upper limit of accelerations which can be tolerated by the occupants of the seats. It is recommended that the troop seat specifications be revised and that dynamic load factors of 25G for 0.20 second plus 45G for 0.10 second be adopted for troop seat design in the longitudinal and lateral directions and 25G for 0.10 second for the vertical direction.