Crashworthy helicopter seat

Details Crashworthy helicopter seat Crashworthy helicopter seat

1980-10-01

1984-01-03

Barefoot, Galen L.

Aeronautics and astronautics

Aircraft structure

Fuselage and body construction

297216, B64D 2504

Patent

active

044238487

ABSTRACT:
An improved helicopter seat primarily for combat aircraft includes at least upper, intermediate, and lower pairs of energy absorbers attached between the seat bucket and the frame of the helicopter and operable in both tension and compression. An upper pair and lower pair of steel tension rods attached between the frame and the seat bucket provide attentuation in a lateral direction. The energy absorbers comprise a plurality of telescoped tubes interfitted into one another and having coils of wire frictionally engaged between adjoining tubes such that energy is dissipated by motion of the tubes relative to one another through the plastic deformation of the coils of wire. The energy absorbers are adjusted to optimize the safety parameters of occupants of the seat under a range of potential crash conditions including the most probable crash condition, and for occupants having a substantial range of weight.

REFERENCES:
patent: 3369634 (1968-02-01), Mazelsky
patent: 4150805 (1979-04-01), Mazelsky
Mason Reilly, "Crashworthy Troop Seat Investigation", USAAMRDL--TR--74--93, Dec. 1974, pp. 53-88, 124-166.

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