Helicopter warning system

Details Helicopter warning system Helicopter warning system

1975-03-18

1976-09-07

Kunin, Stephen G.

Communications: electrical

Selective

Having indication or alarm

73178H, 2351502, 244 1713, 343 7TA, G01C 500

Patent

active

039797171

ABSTRACT:
To prevent inadvertent ground contact of the tail of a helicopter during a landing operation without providing a continuous warning signal for normal landings the altitude and attitude signals are scaled such that when they are equal and opposite in voltage and phase compared to a ground contact curve the comparator will energize a relay for actuating a pilot warning signal. A rate of descent signal biases the altitude signal upward varying in proportion to rate of descent as to enable the pilot to have sufficient warning time to take corrective action.

REFERENCES:
patent: 2871699 (1959-02-01), Kenyon
patent: 3040568 (1962-06-01), Markusen et al.
patent: 3080546 (1963-03-01), Deschamps et al.
patent: 3295795 (1967-01-01), Meek, Jr. et al.
patent: 3417729 (1968-12-01), Gilday et al.
patent: 3489378 (1970-01-01), Watson et al.
patent: 3617848 (1971-11-01), Friday et al.
patent: 3658280 (1972-04-01), McDonnell
patent: 3715718 (1973-02-01), Astengo

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