초록

A propeller blade spar/foam subassembly is manufactured by disposing a lamination of prepreg within a mold, closing the mold about a spar and injecting foam into mold cavities formed at the lead edge and the trailing edge of the spar.

대표청구항 ▼

Method of constructing a spar/foam subassembly for a propeller blade, comprising the steps of: lining interior molding surfaces of a pair of mold halves with a layer of prepreg material; inserting a spar having a leading edge and a trailing edge between said mold halves; applying an adhesive to said

Method of constructing a spar/foam subassembly for a propeller blade, comprising the steps of: lining interior molding surfaces of a pair of mold halves with a layer of prepreg material; inserting a spar having a leading edge and a trailing edge between said mold halves; applying an adhesive to said spar for filling in gaps between camber and face sides of the spar and said mold; after said inserting step, said lining step, and said applying step mating said mold halves to form a first cavity between the molding surfaces and the leading edge of the spar and a second cavity between the molding surfaces and the trailing edge of the spar; after said mating step, injecting a foam within said first and second cavities; and after said injecting step, simultaneously curing said foam and said prepreg material.