On 12 September 1962, an experimental wall- and ceiling-mounted, energy-absorbing troop seat was dynamically tested by being subjected to an actual aircraft crash. The seat was installed as a sidemounted seat, and its occupant was a standard 95thpercentile, 200 pound anthropomorphic dummy. Accelerations were measured in the vertical and longitudinal directions within the dummy and at the passenger cabin floor. An experimental seat-belt tiedown strap was used, and the loads transmitted to the shoulder harness and seat belt were recorded. Postcrash evaluation revealed that no failures in the seat, the energy-absorbing assembly, or the tiedown chain occurred. The seat, through its energy-absorbing capability and its design to utilize to best advantage the natural deformation of the aircraft structure, limited the occupant acceleration to 25G in an impact having an initial velocity in excess of 40 ft./sec. in the vertical direction. The restraint system used was found to prevent the occupant from shifting position within the seat during impact, yet allowed the occupant and seat together to displace with respect to the airframe. (Author)


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    Title :

    Dynamic Test of an Experimental Troop Seat Installation in an H-21 Helicopter


    Contributors:

    Publication date :

    1963


    Size :

    39 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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