|국가/구분||United States(US) Patent 등록|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 17 인용 특허 : 22|
An inlet door assembly and method for reducing noise from an auxiliary power unit (APU) contained within an aircraft housing is provided. The inlet assembly includes an inlet duct, an actuator, and a door. The inlet duct is configured to extend from the auxiliary power unit to the aircraft housing and has a sidewall that defines a flow passage through which APU noise propagates. The actuator is disposed at least partially within the inlet duct. The door coupled to the actuator. The actuator is also configured to selectively rotate the door between at lea...
The invention claimed is: 1. A method for reducing noise from an auxiliary power unit (“APU”) located within an aircraft housing of an aircraft said aircraft having a forward section, the method comprising: rotating a first door away from a duct into an open position while a second door is in a flush position with respect to the first door to scoop ram air into the duct, wherein the first door, the second door, and the duct form portions of an inlet door assembly, and wherein the first door has an aft side and a forward side, the aft side ...