Color and markings: Torpedo tube – brown with red band inboard of externally threaded end, white triangle near midpoint of tube and eleven inches in-board of red band on op-posite side from whit triangle is .

Description: The igniter system consists of two pull igniters screwed into an igniter hol-der which fits into the igniter locking collar. The rings of the igniters are connected by lines to the lanyard holder. The igniters are simple match composition pull igniters with a black powder delay of 8 seconds, an initiant, and a base charge of tetryl. When shipping, the steel nose cap is threaded onto the igniter as shown in drawing.

The torpedo proper is a steel tube with shoulders welded to both ends. One end is inter-nally threaded to take the igniter locking collar and the other end is threaded externally to take the pointed nose cover. When shipped the tube has a cap screwed over one end and a male plug threaded into the other.

Employment: The bangalore torpedo is used by the Japanese to demolish barbed-wire entanglements. It can also be used as a booby trap, actuated by pull.

Operation: The caps are removed from the ends of the tube, the pointed nose cover is screwed onto one end, and the igniter locking collar into the other end. The torpedo is now ready for use. When the torpedo is placed the safety pin is removed and the firing lanyard is pulled sharply. Personnel can take cover in the 8 seconds delay period.

The pulling of the firing lanyard pulls the match composition through the abrasive. The flash starts the black powder which after 8 seconds delay fires the inititant and tetryl base charge and the torpedo charge.

Figure 162 – Bangalore Torpedo and Igniter.