Aeronautics and astronautics – Safety lowering devices – Parachutes
Patent
1986-10-23
1988-06-21
Barefoot, Galen
Aeronautics and astronautics
Safety lowering devices
Parachutes
244149, B64D 1736
Patent
active
047520507
ABSTRACT:
A single multi-line cutter is connected to each of a cluster of parachutes by a separate short tether line that holds the parachutes, initially reefed by closed loop reefing lines, close to one another. The closed loop reefing lines and tether lines, one from each parachute, are disposed within the cutter to be simultaneously cut by its actuation when a central line attached between the payload and the cutter is stretched upon deployment of the cluster. A pyrotechnic or electronic time delay may be included in the cutter to delay the actual simultaneous cutting of all lines until the clustered parachutes attain a measure of stability prior to being disreefed. A second set of reefing lines and second tether lines may be provided for each parachute, to enable a two-stage, separately timed, step-by-step disreefing.
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W. J. Everett et al., "Recovery of 60,000 Lbs. Using a Cluster of Six 137 Ft. Dia. Parachutes", AIAA 8th Aerodynamic Decelerator and Balloon Tech. Conf., AIAA Paper 84-0800-CP, Hyannis, MA, Apr. 2-4, 1984.
R. W. Rodier et al., "136-Foot Main Parachute for Recovery of Space Shuttle Solid Rocket Boosters", AIAA 8th Aerodynamic Decelerator & Balloon Tech. Conf., AIAA Paper 84-0804-CP, Hyannis, MA, Apr. 2-4, 1984.
Johnson, Donald W., "F/FB111 Crew Module Recovery Parachute Redesign Feasibility Study Report", Sandia Report, SAND 85-0468, May 1985.
Barefoot Galen
Chafin James H.
Corl Rodney
Daniel Anne D.
Hightower Judson R.
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