Stock material or miscellaneous articles – Structurally defined web or sheet – Honeycomb-like
Patent
1984-12-31
1986-07-15
Epstein, Henry F.
Stock material or miscellaneous articles
Structurally defined web or sheet
Honeycomb-like
156173, 156292, B32B 312
Patent
active
046006192
ABSTRACT:
An engine inlet sound diffusion structure for use with a turbofan engine is constructed of nonmetallic composite materials. An inner perforated skin of the diffuser is made up of continuously wound composite material filaments. A honeycomb core is sandwiched between the inner porous skin and a nonporous outer skin also comprised of continuously wound filaments. The perforations in the inner skin are formed directly in the skin by programmed placement of the filaments during the winding process. The formation of the perforations can be assisted by the use of a mandrel having spikes formed on its outer surface.
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Chee Wan T.
Quigley George W.
Epstein Henry F.
The Boeing Company
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