Navigational indicating system for rotary wing aircraft

Communications: electrical – Aircraft alarm or indicating systems – Aircraft beacons

Reexamination Certificate

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Details

C340S946000, C340S978000, C362S470000, C416S005000, C244S017110, C701S014000, C073S17800T

Reexamination Certificate

active

07324016

ABSTRACT:
Red, green and white colored lights are emitted from navigation orientation indicating light emitting devices mounted within a helicopter rotor blade near its tip. The light emissions from such devices are under control to respectively indicate passage of the rotor blade through limited arcuate portions of the travel path of the rotor blade end tip. Operational control over the light emitting devices is effected by data processing of outputs from air-speed responsive sensors on the blade end tip.

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Lubke, Kpt. A., Translated Excerpt from “Die geschichtliche Entwicklung der Lichterfuhrung im SeestraBenverkehr”, from “ Der Seewart—Nautische Zeitschrift Fur di Deutsche Seechiffahrt”, vol. 18, No. 3, 1957, pp. 95-105.

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