Method for manufacturing a composite fan inlet housing

Methods for manufacturing a composite fan inlet housing are disclosed. The methods include inserting a first piece (110) of composite material and a second piece of composite material (120) into a molding tool (300), inserting an inflatable bladder (320) between the first piece and the second piece, and pressurizing (322) the inflatable bladder to a curing pressure for a length of time sufficient to allow the first piece and second piece to cure and injecting foam (130) between the cures first piece and second piece.