Dynamic Test of an Aircraft Litter Installation

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Dynamic Test of an Aircraft Litter Installation

J. Schamadan / J. W. Turnbow / L. W. T. Weinberg

The report presents an analysis of the crashworthiness characteristics of a standard litter/patient restraint system as installed in an H-21 helicopter which was subjected to a dynamic crash test. Several personnel restraint systems were installed in the aircraft to permit evaluation of performance under impact conditions. Included was a standard litter installation. Anthropomorphic dummies were placed on the litters. Accelerometers were mounted in the pelvic areas of the dummies, and tensiometer links were mounted on the litter support straps. A high-speed camera was positioned in the helicopter to record the action of the litter installation during the crash sequence. Although the crash was considered to be survivable, the litter/patient restraint system failed completely. The details of the failures are discussed; and it is concluded that the military specifications covering litter/patient restraint systems are not realistic and, therefore, litter/patient restraint systems produced in accordance with these specifications do not provide adequate protection for the occupant. (Author)