Control system for rotorcraft for preventing the vortex ring...

Details Control system for rotorcraft for preventing the vortex ring... Control system for rotorcraft for preventing the vortex ring...

2005-04-19

2005-04-19

Poon, Peter M. (Department: 3643)

Aeronautics and astronautics

Aircraft, heavier-than-air

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

C244S017250

Reexamination Certificate

active

06880782

ABSTRACT:
A flight control system for a rotorcraft to prevent the adverse effects of the vortex ring state is disclosed. In the flight control system of the present invention, selected control inputs are sent the rotorcraft prior to the onset of the vortex ring state. In the preferred embodiment, the control inputs are transient, do not require input from the pilot, and do not affect the flight path of the rotorcraft.

REFERENCES:
patent: 6260796 (2001-07-01), Klingensmith
patent: 6340133 (2002-01-01), Capanna
patent: 6457672 (2002-10-01), Tai
patent: 6644588 (2003-11-01), King et al.
patent: 6655631 (2003-12-01), Austen-Brown
patent: 6695264 (2004-02-01), Schaeffer et al.
http://www.fas.org/man/dod-101/sys/ac/v-22.htm.
http://198.65.138.161/military/systems/aircraft/v-22-cockpit.htm.
http://www.boeing.com/rotorcraft/military/v22/w22160-01.html.

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