page_title: Type 11 70 mm infantry mortar
section_title: Design
hierarchical_section_title: Type 11 70 mm infantry mortar / Design
caption_attribution_description: English: Type 11 Infantry mortar of the Imperial Japanese Army with carrying handles, 1925
context_page_description: The Type 11 70 mm infantry mortar, was a muzzle-loading, rifled bore infantry mortar used by the Japanese. The Type 11 designation was given to this gun as it was accepted in the 11th year of Emperor Taishō's reign. It was first used in 1922 and was the first mortar to be introduced by the Imperial Japanese Army. The mortar was later replaced by the Type 92 battalion gun.
context_section_description: The Model 11 (1922) 70 mm mortar is exceptional among Japanese mortars in that, although a muzzle-loading weapon, it has a rifled bore. The Japanese marking is "11th year model high-angle infantry gun". A monopod, similar to the support of the US 4.2-inch chemical mortar, is another distinguishing feature. The total weight of the weapon is 133.75 lb (60.7 kg), of which 99.5 lb (45.1 kg) represents the weight of the base plate. The traverse of the piece is 410 mils (23 degrees), and its elevation is 661 to 1,370 mils (37 to 77 degrees). A gunner's quadrant is used to lay in the weapon. It has a level vial, actuated by a knob, a movable arm, and a fixed elevation scale. The elevation scale is graduated in half-degree units from 0 to 55 degrees. The movable arm has a vernier scale which permits readings of 1/16th degree. Before the weapon can be fired, by means of a lanyard attached to a striker arm, a latch pin on the breech end of the tube must be set in its recess.
caption: Type 11 infantry mortar with carrying handles
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