Patent ID: 9574497
Date: 2017-02-21
CPC Classifications: B64D,F02C,Y10T

Claim:
1. A plenum assembly for a rotorcraft, the plenum assembly comprising: a plenum duct having an inlet flange and an outlet flange at opposing ends of the plenum duct; the inlet flange defining an inlet to flow air into a barrier filtration system, the inlet flange configured to be substantially aligned with an outer surface of a closed cowl door assembly of the rotorcraft, wherein a gap between the inlet flange and the closed cowl door assembly allows relative motion of the plenum assembly and the rotorcraft; the outlet flange defining an outlet to flow air filtered by the barrier filtration system into an engine of the rotorcraft, wherein an inlet of the engine is connected to the cowl door assembly and the outlet flange is positioned between the inlet of the engine and the engine; and the plenum duct configured to flow air from the inlet to the outlet of the barrier filtration system and to be hard mounted to the engine of the rotorcraft.