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51 mm smoke bomb
Region
India
Category
Ammunition, Missiles and precision weapons
Armament UK pattern 51 mm mortar. Development By Indian Ordnance Factory Board, based upon British Bomb, Smoke, 2 in Mortar Mk II. Description The bomb consists of a tubular steel body, closed at the head by a steel cap, and a light-alloy tail unit attached to the rear end. The body is filled with a hexachloroethane/zinc smoke mixture; in the centre rear is a filling of priming mixture and a central filling of ignition composition. The tailcone is perforated with two holes. The tail unit carries the usual central
propelling cartridge; no secondary charges are used. On firing, the flash from the propelling cartridge passes through the holes in the tailcone and fires the ignition composition. This, in turn, fires the priming mixture which takes a small time to burn through, thus allowing the bomb to pass its vertex before the ignition of the smoke mixture. The smoke then escapes through the holes in the tailcone as the bomb falls to the ground and after it has landed. Manufacturer Indian Ordnance Factory Board, 10A Auckland Road, Calcutta.