Accession Number:

AD0261677

Title:

MODIFICATION OF FUZE TO PREVENT PREMATURE ACTION

Descriptive Note:

Corporate Author:

LAKE CITY ARSENAL INDEPENDENCE MO

Personal Author(s):

Report Date:

1961-04-01

Pagination or Media Count:

1.0

Abstract:

The work conducted by Lake City Arsenal to eliminate those premature functions of the 20mm Fuze, PD, M505 due to loss of the fuze cover is reported. Investigatory tests verified that premature functioning was related to loss of the fuze cover during flight air impingement driving the firing pin into the detonator. The firing pin was modified by addition of a shear flange around the head which prevented rearward movement except upon impact with a solid object. Minor modifications were also made to the fuze firing pin guide hole. Ballistic firing tests of the M505 Fuze with various firing pin flange thicknesses, were conducted against aluminum alloy plate of various thicknesses set at different obliquities and ranges to determine functioning sensitivity. Ballistic tests indicated that prematures due to loss of the fuze covers had been eliminated. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE