Study of Bra~s Obturator Design for Combustible Cartridge Case for i 105 mm Tank Gun Ammunition I

.Brass cartridge case provides rea~atd obturation in the tank gun ammunition where the gun systedt has a sliding breec ~ mechanism. In the case of lsemi-combustible cartridge case (SCCC) ammunition, obturation is provided by a small metal stub. The mechanism of obturation and obturator pesign for kinetic energy and high explosive squash heat (HESH), SCCC ammunition of 105'mm tank Igun have been studied. The dynamic firing.results for SC ~ ammunition for 105 mm tank ~n reveal that brass obturating cup of height 115 mm provides perfect obturation. The ballistic perfonhance of SCC;C ammuniti~n is comparable with that of the brass-cartridged round in the pressure range 15(}.450 MPa. I Cartridge case is. an importan ~ component of any gun ammunition jsystem. Its functions are to serve as a container f?r the propellant, as an obturating device and as a means for assemblin