Multi-layer ram air parachute canopy

Details Multi-layer ram air parachute canopy Multi-layer ram air parachute canopy

1979-08-27

1981-03-03

Barefoot, Galen L.

Aeronautics and astronautics

Safety lowering devices

Parachutes

244152, B64D 1704, B64D 1718

Patent

active

042536278

ABSTRACT:
Maximum lifting force is achieved in a dome-shaped parachute by fabricating he canopy of upper and lower spaced canopy membranes. A plurality of circumferentially spaced, radially disposed, flexible rib sections are connected between the canopy membranes to form a plurality of ram air cells, each cell having a ram air inlet port at the canopy hem, and a ram air outlet port at a central vent at the canopy apex. The rib sections can be provided with porous sections to equalize the ram air pressure between adjacent cells. The bottom canopy wall in each ram air cell may also be provided with a porous section for admitting the positive air beneath the canopy into each cell. A pull down vent line can be connected to the canopy apex for changing the camber or angle of attack, and therefor the parachute drag.

REFERENCES:
patent: 1737913 (1929-12-01), Broadwick
patent: 2562799 (1951-07-01), Kowalski
patent: 2759694 (1956-08-01), Lemoigne
patent: 2764375 (1956-09-01), Lemoigne
patent: 3428277 (1969-02-01), Everette, Jr.

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