A Bangalore torpedo is an explosive charge placed within one or several connected tubes. It is used by combat engineers to clear obstacles that would otherwise require them to approach directly, possibly under fire. It is sometimes colloquially referred to as a "Bangalore mine", "banger" or simply "Bangalore". The primary use of the torpedo is clearing paths through wire obstacles and heavy undergrowth. It will clear a 3- to 4-metre wide path through wire obstacles.
The Bangalore torpedo was first devised by Captain R. L. McClintock, of the Royal Engineers while attached to the Madras Sappers and Miners unit of the Indian Army at Bangalore, India, in 1912. He invented it as a means of blowing up booby traps and barricades left over from the Second Boer War and the Russo-Japanese War. The Bangalore torpedo could be exploded over a mine without a sapper having to approach closer than about 3 m (10 ft).
By the time of WW1 the Bangalore torpedo was primarily used for clearing barbed wire before an attack. It could be used while under fire, from a protected position in a trench. The torpedo was standardized to consist of a number of externally identical 1.5 m (5 ft) lengths of threaded pipe, one of which contained the explosive charge. The pipes would be screwed together using connecting sleeves to make a longer pipe of the required length, somewhat like a chimney brush or drain clearing rod.
A smooth nose cone would be screwed on the end to prevent snagging on the ground. It would then be pushed forward from a protected position and detonated, to clear a 1.5 m (5 ft) wide hole through barbed wire. During the 1917 Battle of Cambrai, British Royal Engineers used them as diversions to distract the enemy from where the real battle was to be fought.
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