Accession Number : AD0700965

Title :   NOTES ON THE HEATING AND EROSION CAUSED BY RAPID FIRE IN 3 INCH A.A. GUN T9 NO. 1,

Corporate Author : BALLISTIC RESEARCH LABS ABERDEEN PROVING GROUND MD

Personal Author(s) : Balleisen,C. E.

Report Date : 12 JAN 1939

Pagination or Media Count : 14

Abstract : The subject gun was subjected to two extended bursts of extremely rapid fire. The temperature existing at the surface of the bore at the conclusion of these firings was computed to be near 750 F(400 C). Several star-gage records of this gun are compared and an estimate made from them of its probable accuracy life. It is estimated that the accuracy life will be 1068 rounds instead of 2500 rounds, if erosion continues to progress at the same rate as during the rapid firings. (Author)

Descriptors :   (*ANTIAIRCRAFT GUNS, LIFE EXPECTANCY), FIRING TESTS(ORDNANCE), CYCLIC RATE, BREECH MECHANISMS, RECOIL MECHANISMS, TEMPERATURE, EROSIVE BURNING, EROSION, INTERIOR BALLISTICS

Subject Categories : Ballistics

Distribution Statement : APPROVED FOR PUBLIC RELEASE