TERMIUM Plus^®

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%26rsquo%3Bs%20curve

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,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 CONT

The fenestron, [like] a conventional tail rotor, [features] spinning blades that generate a thrust force to cancel out the tendency of a helicopter fuselage to rotate. However, the fenestron rotor differs from a conventional rotor by adding several more blades.... Compared to conventional tail rotor blades, the fenestron blades are also much smaller and spin at higher speeds. Furthermore, these blades are mounted within a shroud that forms part of the vertical tail fin of the helicopter. This configuration turns the rotor into a ducted fan whose blade tips are protected from the external air.  3, record 2, English, - fantail

Record number: 2, Textual support number: 1 OBS

fenestron: This term was a trademark that has now passed into everyday language.  5, record 2, English, - fantail

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 CONT

Un fenestron est une cavité carénée hébergeant le rotor anticouple de queue d'un hélicoptère. Les rotors de queue conventionnels ont de 2 à 4 pales. Les rotors de queue dans des fenestrons ont de 8 à 18 pales de taille plus réduite. Elles ont des angles d'incidence différents qui font que le bruit est réparti sur différentes fréquences et de ce fait est moins intense. Le fenestron permet une vitesse de rotation supérieure.  2, record 2, French, - fenestron

Record number: 2, Textual support number: 2 CONT

Comme sur tous les hélicoptères qui en sont équipés, le fenestron est avant tout un équipement qui participe à l'amélioration de la sécurité de l’appareil et de ses opérateurs. En carénant le rotor anticouple, on le protège des risques de collision au sol tout en évitant les accidents qui peuvent concerner les personnels au sol. [...] Même en cas de destruction ou de panne du rotor anticouple lui-même pendant le vol, les propriétés aérodynamiques du carénage du fenestron apporteraient une sécurité additionnelle.  3, record 2, French, - fenestron

Record number: 2, Textual support number: 1 OBS

fenestron : Ce terme a été une marque de commerce, mais depuis il a passé dans la langue courante.  4, record 2, French, - fenestron

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 DEF

The blade moving in the same direction as the helicopter.  2, record 3, English, - advancing%20blade

Record number: 3, Textual support number: 1 OBS

advancing blade: term officialized by the Aeronautical Terminology Standardization Committee (ATSC) - Helicopters.  3, record 3, English, - advancing%20blade

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 OBS

pale avançante : terme uniformisé par le Comité d'uniformisation de la terminologie aéronautique (CUTA) - Hélicoptères.  2, record 3, French, - pale%20avan%C3%A7ante

Record 3,  Textual support,  Spanish

Record number: 3, Textual support number: 1 CONT

Al variar el ángulo de ataque el helicóptero sube o baja. [...] Según gira el rotor, la pala que avanza sube y la pala que retrocede baja.  1, record 3, Spanish, - pala%20que%20avanza

Record number: 3, Textual support number: 2 CONT

En vuelo horizontal, cuando el helicóptero se desplaza en una dirección determinada, [...] la velocidad de translación del desplazamiento hace que [...] en el semiplano de la pala en avance, la velocidad relativa en cada punto de la pala aumenta, respecto de la situación de vuelo estacionario sin viento.  2, record 3, Spanish, - pala%20que%20avanza

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 DEF

The load sustained by the rotor blades of a helicopter.  2, record 4, English, - blade%20loading

Record number: 4, Textual support number: 1 OBS

[The blade loading is] determined by dividing the total weight of the helicopter by the combined area of all the rotor blades.  3, record 4, English, - blade%20loading

Record number: 4, Textual support number: 2 OBS

blade loading: term officially approved by the Aeronautical Terminology Standardization Committee (ATSC) - Helicopters.  4, record 4, English, - blade%20loading

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 DEF

Charge soutenue par les pales de rotor d'un hélicoptère.  3, record 4, French, - charge%20%C3%A0%20la%20pale

Record number: 4, Textual support number: 1 OBS

La charge à la pale est déterminée en divisant le poids total de l'hélicoptère par la superficie totale de toutes les pales de rotor.  3, record 4, French, - charge%20%C3%A0%20la%20pale

Record number: 4, Textual support number: 2 OBS

charge à la pale : terme uniformisé par le Comité d'uniformisation de la terminologie aéronautique (CUTA) – Hélicoptères.  3, record 4, French, - charge%20%C3%A0%20la%20pale

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 CONT

The natural frequency of the first flap wise in bending mode.  1, record 5, English, - in%20bending%20mode

Record number: 5, Textual support number: 1 OBS

Rotor of a helicopter blade.  1, record 5, English, - in%20bending%20mode

Record 5,  Textual support,  French

Record number: 5, Textual support number: 1 CONT

La fréquence propre du premier mode de flexion en battement  1, record 5, French, - en%20battement

Record 5,  Textual support,  Spanish

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 DEF

Stall of retreating blade at high helicopter forward speeds, when angle of attack of retreating blade is excessive, especially towards tip...  2, record 6, English, - retreating%2Dblade%20stall

Record number: 6, Textual support number: 1 OBS

retreating-blade stall: term officialized by the Aeronautical Terminology Standardization Committee (ATSC) - Helicopters.  3, record 6, English, - retreating%2Dblade%20stall

Record 6,  Textual support,  French

Record number: 6, Textual support number: 1 CONT

Le décrochage de pale reculante s'accompagne de vibrations, de pertes de puissance et de contrôle.  2, record 6, French, - d%C3%A9crochage%20de%20pale%20reculante

Record number: 6, Textual support number: 1 OBS

décrochage de pale reculante : terme uniformisé par le Comité d'uniformisation de la terminologie aéronautique (CUTA) - Hélicoptères.  3, record 6, French, - d%C3%A9crochage%20de%20pale%20reculante

Record 6,  Textual support,  Spanish

Record 7,  Textual support,  English

Record number: 7, Textual support number: 1 OBS

Westland is an AgustaWestland company, which is owned by Finmeccanica of Italy. AgustaWestland is one of the largest helicopter companies in the world, offering an unrivalled range of helicopters to meet the requirements of both civil and military customers. It has primary operations in the UK, Italy and the USA.... Today Westland is a world leading aerospace company with unrivalled experience in military helicopter markets. It has developed a broad range of capabilities as a prime contractor and a collaborative partner in major aerospace contracts covering aircraft production as well as logistics support and training for a growing number of international defence programmes. Its areas of helicopter expertise include rotor blade technology, avionics and mission systems integration, transmissions development and advanced training services for aircrew and groundcrew.  3, record 7, English, - Westland%20Helicopters%20Limited

Record 7,  Textual support,  French

Record 7,  Textual support,  Spanish

Record 8,  Textual support,  English

Record number: 8, Textual support number: 1 CONT

This report presents the results of a demonstration of an experimental method of determining the flapping moment of inertia of a helicopter rotor blade.  2, record 8, English, - flapping%20moment

Record number: 8, Textual support number: 1 OBS

flapping moment: term officially approved by the Aeronautical Terminology Standardization Committee (ATSC) - Helicopters.  3, record 8, English, - flapping%20moment

Record 8,  Textual support,  French

Record number: 8, Textual support number: 1 OBS

moment de battement : terme uniformisé par le Comité d'uniformisation de la terminologie aéronautique (CUTA) - Hélicoptères.  2, record 8, French, - moment%20de%20battement

Record 8,  Textual support,  Spanish

Record 9,  Textual support,  English

Record number: 9, Textual support number: 1 CONT

With the advent of high performance rotor smoothing systems... the need to "fine-tune" rotor blade trim tabs to within a fraction of a degree has proven to be critical... Our new tab tool kits provide consistent, precise, and reliable tab bends in increments of. 001 in(. 025 mm). These new kits provide innovative features including :[a] dial indicator to provide highly accurate, repeatable adjustments; [a] tab bending tool which allows the user to directly read tab position as bends are made; mechanical provisions that retain the tab measurement tool on the blade and position the tool repeatedly in the proper measurement position; [a] zero reference tool to set the tab measurement tool to the manufacturers’ zero point [and a] protective case for transport and storage. These new tab tools kits are available for use with most helicopter models.  1, record 9, English, - tab%20measurement%20tool

Record 9,  Textual support,  French

Record 9,  Textual support,  Spanish

Record 10,  Textual support,  English

Record number: 10, Textual support number: 1 CONT

With the advent of high performance rotor smoothing systems... the need to "fine-tune" rotor blade trim tabs to within a fraction of a degree has proven to be critical... Our new tab tool kits provide consistent, precise, and reliable tab bends in increments of. 001 in(. 025 mm). These new kits provide innovative features including :[a] dial indicator to provide highly accurate, repeatable adjustments; [a] tab bending tool which allows the user to directly read tab position as bends are made; mechanical provisions that retain the tab measurement tool on the blade and position the tool repeatedly in the proper measurement position; [a] zero reference tool to set the tab measurement tool to the manufacturers’ zero point [and a] protective case for transport and storage. These new tab tools kits are available for use with most helicopter models.  3, record 10, English, - tab%20tool%20kit

Record 10,  Textual support,  French

Record 10,  Textual support,  Spanish

Record 11,  Textual support,  English

Record 11,  Textual support,  French

Record number: 11, Textual support number: 1 DEF

Type d'hélicoptère doté de 2 rotors coaxiaux contrarotatifs répartissant la portance et d'une nouvelle conception des pales.  1, record 11, French, - h%C3%A9licopt%C3%A8re%20ABC

Record 11,  Textual support,  Spanish

Record 12,  Textual support,  English

Record number: 12, Textual support number: 1 CONT

To complicate matters further, another adverse factor appears as soon as the helicopter flies in any given direction : the wing(or blade) which travels in the direction of the flight gets more lift than the one travelling downstream, inducing a roll motion to the machine, as well as vibrations from the load-unload cycle.  1, record 12, English, - downstream%20blade

Record 12,  Textual support,  French

Record number: 12, Textual support number: 1 CONT

Pour compliquer les choses, un autre facteur d'instabilité se manifeste dès que l'appareil se déplace, quelle que soit la direction de vol: la pale qui se déplace dans la direction du vol génère davantage de portance que la pale reculante parce qu'elle se déplace plus vite par rapport à l'air, d'où un mouvement de roulis et des vibrations cycliques.  1, record 12, French, - pale%20reculante

Record 12,  Textual support,  Spanish

Record 13,  Textual support,  English

Record number: 13, Textual support number: 1 CONT

To complicate matters further, another adverse factor appears as soon as the helicopter flies in any given direction : the wing(or blade) which travels in the direction of the flight gets more lift than the one travelling downstream, inducing a roll motion to the machine, as well as vibrations from the load-unload cycle.  1, record 13, English, - load%2Dunload%20cycle

Record 13,  Textual support,  French

Record number: 13, Textual support number: 1 CONT

Pour compliquer les choses, un autre facteur d'instabilité se manifeste dès que l'appareil se déplace, quelle que soit la direction de vol: la pale qui se déplace dans la direction du vol génère davantage de portance que la pale reculante parce qu'elle se déplace plus vite par rapport à l'air, d'où un mouvement de roulis et des vibrations cycliques.  1, record 13, French, - vibrations%20cycliques

Record 13,  Textual support,  Spanish

Record 14,  Textual support,  French

Record 14,  Textual support,  Spanish

Record 15,  Textual support,  English

Record number: 15, Textual support number: 1 CONT

The first helicopter simulators used a rotor map technique which calculated the total thrust vector of the main rotor on the basis of a series of stored steady states... The simulator was therefore quite realistic in steady flight states, but... [not] in transient condition... in order to achieve realism, the main rotor had to be simulated blade by blade throughout every rotation(blade element modelling), so that factors like interference and cross-coupling could be taken into account.  1, record 15, English, - blade%20element%20modelling

Record 15,  Textual support,  French

Record 15,  Textual support,  Spanish