TERMIUM Plus®

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PROPELLER FEATHERING CONTROL [2 records]

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Filter results by subject field

Alphabetical list of terms

Record 1 2017-06-09

English

Subject field(s)
  • Aircraft Propulsion Systems
CONT

Unfeathering is accomplished by holding the feathering button in the OUT position for about 2s. This creates an artificial underspeed condition at the governor and causes high-pressure oil from the feathering pump to be directed to the rear of the propeller piston. As soon as the piston has moved outward a short distance, the blades will have sufficient angle to start rotation of the engine. When this occurs, the unfeathering switch can be released and the governor will assume control of the propeller.

Key term(s)
  • unfeathering operation

French

Domaine(s)
  • Propulsion des aéronefs
CONT

L'action consistant à passer de la position «drapeau» à la position de fonctionnement normal constitue le dévirage du moteur.

CONT

Le dévirage consiste à commander, par l'électro-pompe de drapeau, la diminution de pas, jusqu'au pas nul s'il y a lieu. Le dévirage peut être exécuté, soit automatiquement - et partiellement au début des séquences de mise en route, soit comme une manœuvre indépendante de toute autre.

CONT

Pour assurer le retour en drapeau on utilise les circuits auxiliaires de mise en drapeau puisque le moteur, qui est arrêté, ne peut plus fournir d'énergie de servitude.

OBS

Bien que l'on parle presque toujours de dévirage d'une hélice, c'est par métonymie que certains auteurs parlent de dévirage d'un moteur.

Spanish

Save record 1

Record 2 1985-08-02

English

Subject field(s)
  • Aircraft Propulsion Systems
CONT

Similarly, the output of the pilot valve to either low or high pitch is routed through the feather valve. When the valve is positioned for feathering, the pump manifold is connected directly to the high-pitch line. This isolates the propeller lines from the rest of the control system and closes off the standby pump bypass.

CONT

The NTS-feather valve responds to either an NTS signal [negative torque signal] or a feather signal by porting all fluid pumped by the hydraulic pumps to increase beta (blade angle) passages. Thus a rapid rate of blade-angle change required for feathering or NTS response can be effected.

French

Domaine(s)
  • Propulsion des aéronefs
CONT

[S'il y a augmentation du pas] la force centrifuge des masselottes est supérieure à celle du ressort. Le tiroir du régulateur se déplace vers le haut. Le conduit grand pas est en communication directe avec la pompe [du régulateur] alors que le conduit petit pas est en communication avec le retour à l'aspiration de la pompe.

Spanish

Save record 2

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