Accession Number:

AD0769071

Title:

Modular Ball and Helix Setback Mechanism.

Descriptive Note:

Final rept.,

Corporate Author:

REDM CORP WAYNE N J

Personal Author(s):

• Koeberle,Lowell K.
• Overman,David L.

Report Date:

1973-08-01

Pagination or Media Count:

65.0

Abstract:

The design and performance of a ball and helix double intergrating acceleration mechanism is discussed. This device can be used to provide setback safety for projectile fuzing or mechanical and electrical functions in terradynamics penetration vehicles and long delay mine and bomb fuzes. Units were built and tested having a volume of 0.07 cubic inches, a scale factor of 14.4 to 1, a bias level of 500gs, and an operating threshold of 110 FPS velocity change and 4 inches displacement. Work under a prior contract is summarized, results of laboratory air gun and 81mm mortar field tests are given, and an advanced design is described. Mathematical analysis and correlation with experiments plus detail design drawings are presented in 2 appendices. It is concluded that the ball and helix mechanism is a feasible device and recommendations are made for a final phase of exploratory development. Author

Descriptors:

• *PROJECTILE FUZES
• FUZE FUNCTIONING ELEMENTS
• DETECTORS
• FIRING TESTS(ORDNANCE)
• COMPUTER PROGRAMS

Subject Categories:

• Ammunition and Explosives

Distribution Statement:

APPROVED FOR PUBLIC RELEASE