Accession Number:

ADA017753

Title:

ICBM Overtest Technology. Volume I

Descriptive Note:

Final rept.

Corporate Author:

HERCULES INC MAGNA UT BACCHUS WORKS

Personal Author(s):

• Daniels, A. S.
• Browning, S. C.
• Smartt, K. D.
• Pavelka, T. D.

Report Date:

1975-10-01

Pagination or Media Count:

254.0

Abstract:

This is the final report on the ICBM Overtest Technology Program which was performed by Hercules Incorporated for the Air Force. The primary objective of the program was to develop overtest technology for the prediction of ICBM motor service life. An important secondary objective was to make predictions of the M57A1 motor life. The most critical failure modes were shown by analysis and verified by analog subscale and full-scale motor tests to be wing slot cracking and aft centerport debonding in response to the ignition transient. Event gages were developed for detecting time of failure and to verify gage response. Since no aging effects on the grain were determined, an indefinite service life was projected for the Minuteman 2 Stage 3 motor. A manual of recommended practice for incorporating overtest concepts in surveillance programs has been prepared.

Descriptors:

• *LIFE EXPECTANCY(SERVICE LIFE)
• *SURFACE TO SURFACE MISSILES
• *THIRD STAGE ENGINES
• AGING(MATERIALS)
• CRACKING(FRACTURING)
• LIFE TESTS
• PROPELLANT GRAINS
• SOLID ROCKET PROPELLANTS

Subject Categories:

• Surface-Launched Guided Missiles
• Solid Propellant Rocket Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE