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122 mm Smoke D-462
Регіон
Egypt
China
Iran
Категорія
Боєприпаси, ракети та високоточне озброєння
The 122 mm Smoke D-462 is a separate loading round, with the projectile and cartridge case being loaded separately so that, where appropriate, the propellant charges can be altered to suit the fire mission. The body of the 122 mm Smoke D-462 projectile is forged steel with a relatively short streamlined ogive, a pronounced bourrelet and a distinct boat tail. There is a single copper drive band just over 20 mm wide. The 122 mm Smoke D-462 contains a nominal 3.6 kg of White Phosphorus (WP). A burster charge,
extending halfway down the body interior from behind the fuze well, is occupied by a burster tube containing 160 g of TNT. When the nose-mounted point detonating KTM-2 fuze functions, the burster charge detonates to break open the shell body and scatter the contents. As the White Phosphorus contents come into contact with the air they start to produce a grey/white smoke cloud. No definite information regarding the smoke production duration is available but is probably 40 to 50 seconds. The 122 mm Howitzer M1938 ( M-30 ) ammunition system uses a 'multisection' system of propelling charges. The total weight of the nitrocellulose powder charges is 2.2 kg, made up from a system of nine bags. The basic charge, Charge 8, is a single-base charge bag. The system is built up until the Charge 1 stage is reached which is formed by the base charge bag, four equal section bag charges in a lower layer and three equal section bag charges in an upper layer. The Full Charge is produced by adding one further bag charge to the upper layer, making a total of nine bags in all, which are all held in place by a fibre cup. They are all contained in a brass cartridge case, 284 mm long and weighing 3.25 kg, with a brass percussion primer housing, 25 mm long, threaded into the centre of the base. It is possible to use a cartridge case issued with the Full Charge ready packed and with no facility to alter the charges. This charge system produces a range of muzzle velocities from 205 m/s at the lower end (minimum range 5,350 m) up to the 515 m/s (maximum range 11,800 m) produced by the Full Charge.