Ce glossaire est rédigé pour une utilisation dans le cadre d’une compagnie aérienne virtuelle et de la simulation de vol au sein de Virtual Air Canada Airline. Il ne constitue pas une référence en aviation réelle.
Le groupe auxiliaire de puissance (APU) est un petit turbomoteur à gaz situé dans la section arrière de la plupart des aéronefs commerciaux. Ses rôles principaux sont de fournir de l’énergie électrique et de l’air de prélèvement pneumatique à l’aéronef au sol, indépendamment des moteurs principaux ou de l’alimentation externe au sol. L’APU permet aux équipages d’alimenter l’avionique, l’éclairage de cabine, la climatisation et d’autres systèmes avant le démarrage moteur, et fournit de l’air de prélèvement aux démarreurs moteurs. Sur certains types d’aéronefs, l’APU peut également fournir de l’air de prélèvement en vol comme source de secours pour la pressurisation si un moteur est inopérant.L’exploitation de l’APU consomme du carburant et génère du bruit et des émissions. Les temps de fonctionnement au sol sont typiquement régis par les procédures normalisées et les politiques environnementales de la compagnie pour minimiser la consommation, l’impact sonore sur les communautés aéroportuaires et les émissions de carbone. L’APU est démarré à l’aide de la batterie et est normalement éteint une fois que l’alimentation au sol ou l’air de prélèvement des moteurs principaux est disponible.
Dans les opérations de la compagnie aérienne virtuelle
Chez Virtual Air Canada Airline, la politique environnementale limite l’utilisation de l’APU à un maximum de 30 minutes à la porte. Cela reflète les pratiques de durabilité des compagnies aériennes réelles visant à réduire la consommation de carburant et les émissions inutiles durant les opérations au sol. Les pilotes sont encouragés à se connecter à l’alimentation externe au sol (GPU) dès qu’elle est disponible et à éteindre l’APU rapidement une fois les moteurs principaux en marche et fournissant l’air de prélèvement.
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