12.7 cm/40 Type 89 naval gun

12.7 cm/40 Type 89 naval gun
Type 89 gun mounted on Chitose
Type	Naval gun anti-aircraft gun
Place of origin	Empire of Japan
Service history
In service	1932–45
Used by	Imperial Japanese Navy
Wars	World War II
Production history
Designed	1928–32
Produced	1932–45
Number built	~1500
Variants	Type 88
Specifications
Weight	3,100 kilograms (6,834 lb)
Barrel length	5,080 millimeters (16 ft 8 in) (bore length)
Shell	Fixed
Shell weight	20.9–23.45 kilograms (46.1–51.7 lb)
Caliber	12.7-centimeter (5.0 in)
Breech	horizontal breech block
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 (10,320 yd) (AA ceiling)

The 12.7 cm/40 Type 89 naval gun was a Japanese anti-aircraft (AA) gun introduced before World War II. It was the Imperial Japanese Navy's standard heavy AA gun during the war.

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, their older AA guns were often replaced with Type 89 guns.

Notes

References

• Campbell, John (1985). Naval Weapons of World War II. Annapolis, MD: Naval Institute Press. ISBN 0-87021-459-4. 

External links

• 12.7 cm/40 Type 89 on navweaps.com