Accession Number : AD0779069

Title :   S-3A Graphite/Epoxy Spoiler Development Program.

Descriptive Note : Interim technical rept. no. 1, 29 Jun-31 Dec 73.


Report Date : JAN 1974

Pagination or Media Count : 162

Abstract : Material selection, structural analysis, manufacturing and tool development and verification testing results are presented for an S-3A graphite spoiler. The spoiler is designed to be a cost competitive lightweight replacement for the metal spoiler, and is to be fit and functionally interchangeable with the existing part. The spoiler will be of sandwich construction with graphite/epoxy faces and non-metallic core. Narmco 5209/T300 graphite/epoxy tape material which has a 260F curing temperature was selected for the skins and fiberglass (HRP) core will be used. Problems encountered during the fabrication of 12 manufacturing development specimens and 118 design verification specimens are outlined and solutions explained. A manufacturing operational sequence describes the major fabrication operations. Design verification testing resulted in a design modification to the spoiler because of loss of strength and stiffness when the sandwich specimens were co-cured. Detail assembly drawings are included.

Descriptors :   *Fiber reinforced composites, *Carbon fibers, *Spoilers, Fabrication, Test methods, Loads(Forces), Aircraft

Subject Categories : Aircraft
      Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE