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Type 97 81mm


Infantry Mortar


Imperial Japan | 1937



"The Type 97 81mm infantry mortar served the Japanese Army throughout World War 2."



Authored By: Staff Writer | Last Edited: 02/17/2017 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site; No A.I. was used in the generation of this content.
The Imperial Japanese Army made use of various lobbed ordnance weapon systems throughout World War 2 in their conquest of the Pacific. Chief among these became the unique grenade dischargers that were more akin to miniature personal mortar systems firing a lesser projectile. However, like all modern armies of the time, the IJA also placed value on more conventional mortar designs and these appeared in two popular calibers - 81mm and 90mm.

The Type 97 (or Model 97) was an 81mm mortar was not unlike the American M1 system in design, scope and operation. It consisted of three major components to include the firing tube, base plate and an adjustable bipod assembly. A crank handle at the neck of the bipod allowed for elevation changes by the crew. The base plate was heavy and rectangular in shape and the 81mm projectile rounds were small enough to cup in two hands when handling. The crew adjusted all facets of the projectile's launch based on terrain and windage. Operation was via dropping the active 81mm shell down the firing tube to which the shell struck a waiting firing pin and ignited the projectile's propellant charge. This forced the projectile out of the firing tube and towards the calculated arc destination.

The Type 97 81mm mortar held an effective range out to 3,062 yards, firing at a muzzle velocity equal to 643 feet per second. The crew could elevate the firing tube from +45 to +85 degrees for attacking targets closer to the firing point. The system, as a whole, weighed in at 148lbs and required multiple crew for transport, this breaking down into several pieces. The primary 81mm projectile in use with the Type 97 was the Model 100 High-Explosive (HE) shell weighing just over 7lbs.

The Type 97 81mm mortar entered service with the IJA in 1937 and was kept operational through to the end of the war in August of 1945. The weapon saw considerable actions across the Pacific and Southeast Asia, wherever the IJA was active.

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Physical
The physical qualities of the Type 97 81mm. Information presented is strictly for general reference and should not be misconstrued as useful for hardware restoration or operation.
147.71 lb
67.00 kg
Weight
Manual; Firing Pin at Base
Action
81mm
Caliber(s)
Single-Shot; Reusable Firing Tube
Feed
Adjustable Elevation Mechanism
Sights
Performance
Performance specifications presented assume optimal operating conditions for the Type 97 81mm. Information presented is strictly for general reference and should not be misconstrued as useful for hardware restoration or operation.
9,186 ft
2,799.9 m | 3,062.0 yds
Max.Eff.Range
643 ft/sec
196 m/sec
Muzzle Velocity
Variants
Notable series variants as part of the Type 97 81mm Infantry Mortar family line.
Type 97 - Base Series Designation
Operators
Global customers who have evaluated and/or operated the Type 97 81mm. Nations are displayed by flag, each linked to their respective national small arms listing.

Contractor(s): State Factories - Imperial Japan
National flag of modern Japan

[ Imperial Japan ]
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Image of the Type 97 81mm
Two views of the Type 97 81mm infantry mortar

Design Qualities
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FIRE SUPPORT
Recognition
Some designs stand the test of time while others are doomed to never advance beyond the drawing board; let history be their judge.
Going Further...
The Type 97 81mm Infantry Mortar appears in the following collections:
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