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Japanese 8"/45 Gun


Photograph of Japanese 8"/45 gun turret

Naval History and Heritage Command #NH 82511


Specifications:


Bore diameter
8.0"
203.2mm
Ammunition type
Bagged

Projectile weight

250 lbs
113.4 kg

Velocity

2493 feet per second
760 meters per second

Maximum elevation   

24 to 60 degrees

Range

19,700 yards
18,000 meters


These guns were still in use on the Idzumos, old armored cruisers being used as coastal defense ships. They were used more extensively as coastal defense guns, both in the home islands and at Wake and Tarawa. The ship mounts could elevate to 30 degrees, while many of the coastal guns could not elevate more than 24 degrees (though one mount at Tokyo Bay could apparently elevate to 60 degrees).

Some sources describe these as 40 caliber guns, but Campbell (1985) insists that they were 45 caliber guns.

References

Campbell (1985)


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