| || Study of Brass Obturator Design for Combustible Cartridge Case for 105mm Tank Gun Ammunition
Author : Narr, P.S. ;Syal, R.K.
Source : Defence Science Journal ; Vol:47(3) ; 1997 ; pp 373-381
Subject : 623.4 Armaments and Ballistics
Keywords : High explosive squash heat (HESH)
Abstract : Brass cartridge case provides rearward obturation in the tank gun ammunition where the gun systedt has a sliding breech mechanism. In the case of semi-combustible cartridge case (SCCC) ammunition, obturation is provided by a smal1 metal stub. The mechanism of obturation and obturator design for kinetic energy and high explosive squash heat (HESH), SCCC ammunition of 105mm tank gun have been studied. The dynamic firing results for SCCC ammunition for 105 mm tank gun reveal height 115 mm provides perfect obturation. The ballistic performance of SCCC ammunition is comparable with that of the brass-cartridged round in the pressure range 150-450 MPa.