Method and a device for detecting and signaling that a...

Details Method and a device for detecting and signaling that a... Method and a device for detecting and signaling that a...

2011-03-15

2011-03-15

Swarthout, Brent (Department: 2612)

Communications: electrical

Aircraft alarm or indicating systems

Nonairplane

C073S17800T, C244S017110, C340S945000, C340S963000, C340S968000, C701S009000, C701S014000, C702S144000

Reexamination Certificate

active

07907066

ABSTRACT:
A method and a device (D) for detecting and signaling the approach to a vortex domain by a rotorcraft, the device includes:first elements (1) for measuring the instantaneous vertical speed v of a rotorcraft;second elements (2) for measuring the instantaneous proper airspeed VPof a rotorcraft;third elements (3) constituting a database BDD relating to representing at least one instantaneous vortex domain;fourth elements (4) connected via first, second, and third connections (l1, l2, l3) respectively to the first, second, and third elements, the fourth elements being designed to detect the approach to a vortex domain by the rotorcraft; andfifth elements (5) for signaling the approach to a vortex domain by the rotorcraft, the fifth elements being connected to the fourth elements (4) via a connection (l4).

REFERENCES:
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patent: 2003/0222795 (2003-12-01), Holforty et al.
patent: 2004/101358 (2004-11-01), None
Varnes, David J., “Development of a Helicopter Vortex Ring State Warning System Through a Moving Map Display Computer”, THESIS, Sep. 1, 1999, XP009100651, pp. 1-135.
Johnson, Wayne, “Model for Vortex Ring State Influence on Rotorcraft Flight Dynamics”, NASA Technical Pulbication, No. 2005-213477, Dec. 2005, XP002481739, pp. 1-64.

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