| 摘要 |
PCT No. PCT/FR91/00399 Sec. 371 Date Mar. 6, 1992 Sec. 102(e) Date Mar. 6, 1992 PCT Filed May 17, 1991 PCT Pub. No. WO92/00876 PCT Pub. Date Jan. 23, 1992.A device for protecting a helicopter and its occupants from damage during a crash or difficult landing. The device includes an inflatable bag attached to the bottom fuselage which covers a totality of the surface of the helicopter's bottom fuselage. The bag is inflatable into a trapezoidal shape having a very large volume, exceeding the helicopter's internal volume, for substantially cushioning the helicopter upon impact with the ground during a crash. The bag is equipped with distortion-control reinforcements for preventing toppling of the helicopter after a landing and bag air-pressure controlling and limiting devices.
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