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HARDNBOLD The History of an Australian Militia Battalion in World War 2

Jap Support

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Japanese Support Weapons of WW2 (Sth West Pacific Area)

Imperial Japanese Flag from WWII No enlargement available. Type 92 (70mm Battalion Gun)

Weight

212 kg (gun only)

Range

2745 metres

Elevation

- 10 to + 50 degrees

Traverse

90 degrees

Bomb

High Explosive (HE)

Bomb weight

3.8 kg

Japanese troops hauling the small 70 mm gun into action. The need to transport equipment by hand was due to the lack of motorisation and hostile terrain. The Type 92 was issued at the usual rate of two per Infantry Battalion, though this could be doubled for specific units.

It was a much lighter weapon by comparison to the German 7.5 cm gun, important as it was manhandled or towed by horses wherever the Japanese Army fought. It benefited from a relatively long range, though it was also deployed at much closer ranges. By firing at a higher elevation, it was possible to engage targets just 100 metres distant. This also meant the shells impacted at a much steeper angle, more akin to a mortar than a gun. Manpower wise it was a very expensive weapon to maintain in the field, but its flexibility more than compensated.

The trigger fired Type 89 50 mm mortar. Contemporary American accounts described the weapon as being fired with the base plate braced against the leg. That was unlikely.

The Type 89 cannot properly be described as a mortar, as in the truest sense it was nothing more than a grenade launcher. However, the rounds it fired were not the same as those thrown by the infantryman.

The Type 89 was widely used down to Platoon level where an entire Squad served usually three such dischargers. Its weight meant it was usually carried against one leg or the other. This is credited as the reason why the Americans mistranslated the term 'leg mortar' to mean 'knee mortar'. This was taken to be a reference to the firing procedure, not the carrying method. Trying to fire the discharger braced against the leg, or any other limb, resulted in a broken bone from the fierce recoil generated.

The long range and lightweight of the discharger, combined with its issue at practically the rate of one per Rifle Squad made it a useful local support weapon.

 

No enlargement available.
No enlargement available.

Type94 Mountain Gun

Calibre : 75mm
Barrel Length : 1.56m
EL Angle of Fire : -10 to +45 Degrees
AZ Angle of Fire : right 20 to left 20 Degrees
Weight : 536Kg
Bullet Weight : 6.34Kg
Bullet Speed : 392m/sec
Range : 8,300m

 

Type91 105mm Field Howitzer

Calibre : 105mm
Barrel Length : 2.90m
Weight : 1,500Kg
Bullet Speed : 454m/sec
Range : 10,800m

 

No enlargement available.
 

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HARDNBOLD. A history of the 57/60th Australian Infantry Battalion in World War 2