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81 mm HC smoke bomb S5A1
Регіон
Italy
Категорія
Ammunition, Missiles and precision weapons
Armament 81 mm TDA and similar medium-pressure mortars. Development By Simmel Difesa for Italian Army mortars and for export. Description This bomb is similar to the WP smoke bomb S2A1 in appearance, but differs in the filling and in being fitted with a time fuze. Beneath the time fuze is a black powder expelling charge and a pusher plate, followed by two steel smoke canisters. These rest on a steel plate which is supported by the edge of the body tailcone, fastened to the body by shear pins. The smoke canisters
have a central perforated tube and are filled with hexachloroethane/zinc (HC) smoke composition. The bomb is drop-fired in the usual manner, the time fuze having been set to an appropriate time to produce an airburst at 400 m height at the desired range. When the fuze functions, it fires the expelling charge. The explosion pressure acts on the pusher plate, which then pushes on the smoke canisters and lower steel disc, so placing pressure on the tailcone which shears the securing pins. The tailcone and tailfin unit are thrown clear. While this is taking place, the flame from the expelling charge passes through a central hole in the pusher plate and down the central tubes of the smoke canisters, igniting a priming cloth. Thus the canisters have been ignited by the time they are ejected from the body by the action of the pusher plate. They then fall to the ground, roughly following the trajectory of the bomb, by which time the priming cloth has ignited the smoke composition. Smoke is emitted for a minimum of 40 seconds. Manufacturer Simmel Difesa SpA.