12.7 cm/40 Type 89 naval gun
|12.7 cm/40 Type 89 naval gun|
Type 89 gun mounted on Chitose
|Place of origin||Japan|
|Wars||World War II|
|Mass||3,100 kilograms (6,834 lb)|
|Barrel length||5,080 millimeters (16 ft 8 in) (bore length)|
|Shell weight||20.9–23.45 kilograms (46.1–51.7 lb)|
|Caliber||12.7-centimeter (5.0 in)|
|Breech||horizontal breech block|
|Elevation||-8° to +90°|
|Rate of fire||8-14 rounds per minute|
|Muzzle velocity||720–725 meters per second (2,360–2,380 ft/s)|
|Maximum firing range||9,440 meters (30,970 ft) at 90° (AA ceiling)
14,800 meters (48,600 ft) at 45°
The Type 89 was adopted by the IJN on February 6, 1932, and was the primary anti-aircraft gun on new aircraft carriers, battleships and cruisers, most commonly installed in twin gun mounts. As IJN ships were upgraded in the 1930s and 1940s, older AA guns such as 8 cm/40 3rd Year Type naval gun and 12 cm/45 10th Year Type naval guns were replaced with Type 89's.
- Campbell, Naval Weapons of WWII, p.193.
- Campbell, John (1985). Naval Weapons of World War II. Annapolis, MD: Naval Institute Press. ISBN 0-87021-459-4.
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