Accession Number : ADD006956

Title :   Multi-Layer Ram Air Parachute Canopy.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Matsuo,Jon T

Report Date : 27 Aug 1979

Pagination or Media Count : 8

Abstract : Maximum lifting force is achieved in a dome-shaped parachute by fabricating the 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 chamber or angle of attack, and therfor the parachute drag. (Author)

Descriptors :   *Patent applications, *Parachutes, High lift, Parachute canopies, Cells, Air flow, Membranes, Dual mode

Subject Categories : Gliders and Parachutes

Distribution Statement : APPROVED FOR PUBLIC RELEASE