Multiple auxiliary power unit system inlet ducts controlled...

Details Multiple auxiliary power unit system inlet ducts controlled... Multiple auxiliary power unit system inlet ducts controlled...

2006-06-23

2009-06-02

Cuff, Michael (Department: 3741)

Power plants

Combustion products used as motive fluid

Cooling of auxiliary components

C244S05300R, C244S058000, C137S015100, C137S015200

Reexamination Certificate

active

07540142

ABSTRACT:
An auxiliary power unit (APU) compartment air inlet system seals, via one or more inlet doors driven by a single actuator, an APU compartment, and isolates the APU inlet and cooling system inlets from each other. The system includes either one or two inlet doors, depending on the number of ram air inlets formed in the APU compartment. In either instance, however, a single actuator is used to move the inlet door(s) between open and closed positions.

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