The Prototype Hi-Ro/Hi-Ro Sha. While there are a few photos of this vehicle, none seem to remain of the Ji-Ro. Photo: – Radikal.ru
TYPE95 JI-RA
Last Modified: 2024-07-25 03:23:01
Category
**[World War II Japanese Artillery
A caliber 105mm tank gun developed by the Japanese Army on July 30, 1943 .
2. specifications
Barrel length: 5.759 m (55 caliber)
Weight: about 4.7 tons
Caliber: 105mm
Rotation angle: 360°
Muzzle velocity: 900 m/s
Ammunition: Armor-piercing rounds
3. developer
The Japanese military decided to make a tank gun with a caliber increased to 105mm, probably thinking that 75mm was not enough to stop the heavy tanks of the US army. brought a type 96 150mm howitzer, a double-seat lasik 15cm howitzer, and a loading aid from the navy’s 3-year-old 12cm anti-aircraft gun. Until the end of the war, one each for outdoor testing and one for mounting on a tank was completed.
The prototype anti-tank gun that began development in this way has a caliber of 105 mm, a 55 caliber,[1] It weighed 4.7 tons and was a huge gun that the Japanese military had never mounted on a vehicle at the time. As huge as this, it was required to fire an armor-piercing projectile at a muzzle velocity of 900 m/s and penetrate 150 mm of rolled steel placed vertically at 1 km, which was enough to face the M4 Sherman as well as the M26 Pershing , which was scheduled to be deployed.[2]
It is not clear what kind of shells were used, but considering that anti-tank warfare was in mind, it is assumed that armor-piercing grenades and anti-personnel grenades (high explosive) were used. Although this shell was a huge shell with a weight of 30 kg and a length of 123 cm, it was an integral type rather than a separate type.
An autoloader similar to a chiri was to run.
Because the two-seat machine could not be redesigned and the howitzer was used, the breech was so large that it could not be mounted on a regular turret. Therefore, mounting it in a fixed fighting compartment was mainly considered. For comparison, the 105mm T5E2 tank gun mounted on the T29 tank by the U.S. Army weighed exactly half that, at 2.38 tons, and was mounted on a rotating turret and prepared for combat.
4. equipment to be loaded
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Hori - It was planned to be mounted, but the war ended with half of the body of the prototype made.
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Chiri - It was discussed, but it was only considered because Chiri’s body was bigger and heavier than other chariot’s.
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Chise - I considered using a body as large as Hori or Chiri and putting 105mm on it.
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Kato - It was planned to be equipped, but was terminated before completion along with Hori.
[1] 5.759m.[2] The original standard required penetration of 200mm at 1km, but this was considered possible at a distance of 600m even with a shell having a muzzle velocity of 1,000m/s. It was judged that it was realistically impossible with Japanese technology and lowered the standard. It was predicted that the muzzle velocity of 850m/s would have a penetration of 150mm at the same distance, and it was lowered based on this standard. seems to be