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The Government of Canada’s terminology and linguistic data bank.
UNFEATHER [2 records]
Record 1 - internal organization data 2011-10-24
Record 1, English
Record 1, Subject field(s)
- Aeronautical Engineering and Maintenance
- Aircraft Piloting and Navigation
Record 1, Main entry term, English
- Unfeather
1, record 1, English, Unfeather
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record 1, French
Record 1, Domaine(s)
- Aérotechnique et maintenance
- Pilotage et navigation aérienne
Record 1, Main entry term, French
- Dévirer
1, record 1, French, D%C3%A9virer
correct
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 OBS
(...) "Feather" (mettre en drapeau), signifie placer les pales de l'hélice de telle façon qu'elles ne produisent pas de travail, donc n'offrent que le minimum de résistance à l'écoulement; pour remettre les pales en position on les dévire; l'action de repositionner les pales est le "unfeathering", le dévirage (...) 1, record 1, French, - D%C3%A9virer
Record 1, Spanish
Record 1, Textual support, Spanish
Record 2 - internal organization data 1999-02-04
Record 2, English
Record 2, Subject field(s)
- Aircraft Propulsion Systems
Record 2, Main entry term, English
- unfeather
1, record 2, English, unfeather
correct, verb
Record 2, Abbreviations, English
Record 2, Synonyms, English
Record 2, Textual support, English
Record number: 2, Textual support number: 1 CONT
Unfeathering is accomplished by repositioning the governor control to the normal flight range and restarting the engine ... As soon as the engine cranks over a few turns the governor starts to unfeather the blades and soon wind-milling takes place, which speeds up the process of unfeathering. 2, record 2, English, - unfeather
Record number: 2, Textual support number: 2 CONT
The function of the distributor valve is to direct high-pressure oil to the rear of the piston in the dome when it is desired to unfeather the propeller. 3, record 2, English, - unfeather
Record 2, French
Record 2, Domaine(s)
- Propulsion des aéronefs
Record 2, Main entry term, French
- dévirer
1, record 2, French, d%C3%A9virer
correct
Record 2, Abbreviations, French
Record 2, Synonyms, French
Record 2, Textual support, French
Record number: 2, Textual support number: 1 CONT
La turbine étant arrêtée, ou tournant lentement en autorotation, le ressort chasse le tiroir vers le bas, mettant ainsi la chambre grand pas de l'hélice en communication avec le retour à l'aspiration de la pompe. Dans cette configuration, l'hélice aurait tendance à dévirer et à prendre de la vitesse. Il est donc nécessaire de maintenir le tiroir en position haute; pour obtenir ce résultat, il suffit de placer le levier de commande du régulateur sur la position "drapeau mécanique". 2, record 2, French, - d%C3%A9virer
Record number: 2, Textual support number: 2 CONT
L'hélice perd du pas et, si les électrovalves sont également alimentées, l'hélice dévirera jusqu'au pas nul. 2, record 2, French, - d%C3%A9virer
Record number: 2, Textual support number: 3 CONT
Pour dévirer, il suffit de relâcher l'action sur le levier [de commande du régulateur]. 3, record 2, French, - d%C3%A9virer
Record 2, Spanish
Record 2, Textual support, Spanish
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