Inlet duct selector for tiltrotor barrier filter
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United States of America Patent
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Jul 17, 2018
Grant Date -
Feb 15, 2018
app pub date -
Aug 9, 2016
filing date -
Aug 9, 2016
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The present invention includes an air flow bypass for a tiltrotor engine comprising: a ram air inlet comprising bypass door(s) capable of at least partially or fully blocking a ram air flow through the ram air inlet; a barrier filter inlet positioned in a side, a bottom, and/or a top of a tiltrotor engine nacelle; a filter plenum; a selector duct comprising one or more openings; and one or more selector duct doors or covers over the one or more openings; wherein the barrier filter inlet, the filter plenum, the one or more openings in the selector duct, the selector duct, and an engine are in fluid communication and the bypass door(s) in the ram inlet are closed and the barrier filter inlet provides filtered air flow to the engine when the aircraft is in hover operations.
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