Helicopter blade emergency detachment system

Details Helicopter blade emergency detachment system Helicopter blade emergency detachment system

2007-03-27

2007-03-27

Dinh, Tien (Department: 3644)

Aeronautics and astronautics

Aircraft, heavier-than-air

Helicopter or auto-rotating wing sustained, i.e., gyroplanes

Reexamination Certificate

active

11211923

ABSTRACT:
A method and system for a helicopter blade emergency detachment system that has an activator in the cockpit to initiate the system, an ignition train to provide the detonation signal, a transfer system at the base of the main rotor shaft to move the signal from the stationary helicopter to the rotating blades, and explosive charges located at the root of each main bearing-less rotor blade to separate the composite blade from the main rotor. These four components interact in the way described to enable the blades of the helicopter to be detached during an emergency, thus increasing the stability of the aircraft during a hard landing and/or allowing for the use of an occupant ejection seat or parachute while the helicopter is still in flight.

REFERENCES:
patent: 3229931 (1966-01-01), Larsen
patent: 3778008 (1973-12-01), Ingham et al.
patent: 3912200 (1975-10-01), Foral
patent: 3926388 (1975-12-01), Johnson et al.
Lawrence J. Bement, Rotor Systems Research Aircraft Emergency Escape System, 1978, Proceedings from the 34thAnnual National Forum of the American Helicopter Society, Washington, D.C., May 1978.
In-Flight Escape Systems for Helicopters Should be Developed to Prevent Fatalities, 1973, United States General Accounting Office, Nov. 10, 2003, <http://archive.gao.gov/f0202/094114.pdf>.
KA-50 Black Shark Attack Helicopter, Net Resources International Limited, Oct. 17, 2003, <http://www.airforce-technology.com/projects/ka50/>.
KA-52 Hokum B “Alligator”, Razorworks, Oct. 16, 2003, <http://www.razorworks.com/enemyengaged/hokum/>.

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