Type 4 20 cm rocket mortar. The baseplate is incorrectly positioned, extending backwards. It should face forward in order not to get damaged during firing.
Type
Rocket artillery
Place of origin
Empire of Japan
Service history
In service
1943–1945
Used by
Imperial Japanese Army
Wars
World War II
Specifications
Mass
227.6 kg (502 lb)
Barrel length
1.923 m (6 ft 4 in)[1]
Shell
Total: 83.7 kg (185 lb) Explosive: 15.6 kg (34.4 lb) Propellant 8.4 kg (18.6 lb)
Caliber
203 mm (8 in)[1]
Elevation
40° to +65°
Traverse
300°
Muzzle velocity
175 m/s (570 ft/s)
Maximum firing range
2,400 m (2,600 yd)[1]
The Type 4 20 cm rocket mortar (四式二十糎噴進砲, Yonshiki nijū-senchi funshinhō) was a 203 mm rocket mortar used by the Imperial Japanese Army in the final stages of World War II.
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