Accession Number : ADD007811

Title :   Method of Fabricating a Ducted Blanket for a Rotor Spar.

Descriptive Note : Patent Application,


Personal Author(s) : Anton,John ; Bush,Edward

Report Date : 17 Jul 1980

Pagination or Media Count : 9

Abstract : A method for fabricating an impervious fiberglass blanket having a plurality of spaced-apart slots on its inner side, such as for overlaying and venting a pressurized helicopter rotor spar, includes the steps of positioning a thin metal forming grid of spaced-apart strips, corresponding to the desired slots, on a forming table over a sacrificial layer of peelable material. Sheets of resin-impregnated fiberglass material are positioned over the grid, another sacrificial layer is applied, and a flat caul plate is placed over the lay-up. The laid-up assembly is placed in a vacuum bag, the bag is evacuated, and the assembly is cured in an autoclave. (Author)

Descriptors :   *Patent applications, *Helicopter rotors, *Spars, Fiberglass, *Blankets, Fabrication, Composite structures, Vents, Venting, Ducts, Inventions

Subject Categories : Helicopters
      Ceramics, Refractories and Glass
      Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE