Accession Number:

AD0281710

Title:

SPINNING THIN-WALL SECOND-STAGE MINUTEMAN NOZZLE THROAT INSERTS OF UNALLOYED TUNGSTEN,

Descriptive Note:

Corporate Author:

AEROJET-GENERAL CORP SACRAMENTO CALIF

Personal Author(s):

Report Date:

1962-07-31

Pagination or Media Count:

18.0

Abstract:

The feasibility of fabricating full-scale second-stage Minuteman nozzle throat inserts of unalloyed W by a combination of shear and conventional spinning was investigated. Replacing the present forged-and-machined nozzle throat insert with a spun thin-wall insert would significantly reduce nozzle weight. Thin wall 0.060-in.-thick convergent-divergent nozzle throat inserts were successfully fabricated from 0.250-in.-thick unalloyed W plate by a combination of shear and conventional spinning. Tungsten plates were shear-spun into 60-degree-included-angle cones with a wall-thickness reduction of 50. These cones were then spun to an included angle of 30 degrees wall-thickness reduction was again 50, for a total reduction of 75. The 30-degree cones were conventionally spun to an 8-degree included angle and then to a convergent-divergent configuration conforming to the second-stage Minuteman nozzle throat-insert design. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE