An intake duct assembly for an auxiliary power unit system is provided. A first inlet adapter includes at least one hole through the duct wall. A fire containment apparatus forms a first passage to direct intake air between exterior wall of the aircraft and the enclosure. An inner duct mounted on the first inlet adapter at a first position downstream of the at least one hole and mounted on the second inlet adapter. An outer sheath is mounted on the first inlet adapter at a second position upstream of the at least one hole and mounted on the second inlet adapter. The outer sheath circumscribes the inner duct to form at least a portion of a barrier annulus between the inner duct and outer sheath in fluid communication with the first passage via the at least one hole in the first inlet adapter.
FIRE CONTAINMENT APPARATUSES FOR AIRCRAFT DUCT ASSEMBLIES
2016-06-09
Patent
Electronic Resource
English
IPC: | B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT |
FIRE CONTAINMENT APPARATUSES FOR AIRCRAFT DUCT ASSEMBLIES
European Patent Office | 2019
|Fire containment apparatuses for aircraft duct assemblies
European Patent Office | 2017
|