Accession Number:

AD0261959

Title:

STRUCTURAL TESTS OF A CHEMICALLY MILLED LADISH D-6AC STEEL SECOND-STAGE MINUTEMAN AFT CLOSURE

Descriptive Note:

Corporate Author:

AEROJET-GENERAL CORP SACRAMENTO CALIF

Personal Author(s):

Report Date:

1961-07-01

Pagination or Media Count:

1.0

Abstract:

A study was made to determine if the structural strength requirements for the aft closure of the second-stage Minuteman engine could be met with reduced-weight, chemically milled closure of Ladish D-6ac steel. The study indicated that the chemically milled aft closure, which weighed 60 lb less than the conventional steel closure, had satisfactory structural strength. The structural tests were made with an aft closure of the Preliminary Flight Rating Test PFRT design. The closure was chemically-milled twice to reduce the thickness of part of the shell, the nozzle bosses, and the bolted joint. Stresscoat was applied to the aft closure and the unit was hydrostatically tested after each milling operation. An analysis of stress and strain data indicated that the reduced-weight closure satisfactorily withstood a pressure of 600 psig and will meet ultimate strength design criteria. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE