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DEADMANS CURVE [1 record]
Record 1 - internal organization data 2017-11-16
Record 1, English
Record 1, Subject field(s)
- Helicopters (Military)
- Aircraft Maneuvers
- Aircraft Piloting and Navigation
Record 1, Main entry term, English
- deadman's curve
1, record 1, English, deadman%27s%20curve
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
- deadmans curve 2, record 1, English, deadmans%20curve
correct
Record 1, Textual support, English
Record number: 1, Textual support number: 1 CONT
All helicopters incorporate a one-way clutch system that allows the rotor blades to continue to rotate under the effects of inertia and autogiro-type flight in the event of engine failure. ... the flow of the airstream through the helicopter rotor disk is reversed. The force of gravity continues the operation of the rotor blade, thereby reducing the rate of descent and allowing a successful emergency landing. Because of the time required to effect this change and the necessity for other flight maneuvers, these characteristics led to the development of a restricted area of operations of the helicopter known as the deadman's curve, bounding that area of height and speed in which the helicopter should not be operated. 1, record 1, English, - deadman%27s%20curve
Record 1, French
Record 1, Domaine(s)
- Hélicoptères (Militaire)
- Manœuvres d'aéronefs
- Pilotage et navigation aérienne
Record 1, Main entry term, French
- zone critique
1, record 1, French, zone%20critique
correct, feminine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
[...] si le moteur vient à s'arrêter [... la voilure tournante, conservant son mouvement de giration, va permettre à l'hélicoptère de regagner le sol en quelque sorte en vol plané. [...] Le pilote doit réduire immédiatement et à fond le pas collectif afin que les pales du rotor [...] puissent attaquer l'air sous l'angle de moindre résistance et conserver ainsi [...] un régime de rotation suffisant pour maintenir la sustentation [...] Toutes ces manœuvres [...] ne sont [...] efficaces que si l'hélicoptère ne se trouve pas dans la zone d'évolution qu'on est convenu d'appeler la «zone critique», soit qu'il se tienne en vol stationnaire ou à très faible vitesse à une altitude insuffisante (entre 100 et 3 m du sol), soit qu'il vole à quelque 25 ou 30 m de haut à grande vitesse, et cela afin que le pilote puisse dans le premier cas avoir le temps de mettre l'appareil en translation, dans le second cas réduire son allure et régler sa position par rapport au terrain où il doit se poser. 1, record 1, French, - zone%20critique
Record 1, Spanish
Record 1, Textual support, Spanish
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