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12.7 cm/40 Type 89 naval gun

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Naval gun
12.7 cm/40 Type 89 naval gun
Type 89 gun mounted on Chitose
TypeNaval gun
anti-aircraft gun
Place of origin Empire of Japan
Service history
In service1932–45
Used by Imperial Japanese Navy
WarsWorld War II
Production history
Designed1928–32
Produced1932–45
No. built~1500
VariantsType 88
Specifications
Mass3,100 kilograms (6,834 lb)
Barrel length5,080 millimeters (16 ft 8 in) (bore length)
ShellFixed 127 x 580mm .R
Shell weight20.9–23.45 kilograms (46.1–51.7 lb)
Caliber12.7-centimeter (5.0 in)
Breechhorizontal breech block
Elevation-8° to +90°
Rate of fire8-14 rounds per minute
Muzzle velocity720–725 meters per second (2,360–2,380 ft/s)
Maximum firing range9,440 meters (30,970 ft) at 90° (AA ceiling)
14,800 meters (48,600 ft) at 45°

The 12.7 cm/40 Type 89 naval gun (40 Kokei Hachikyu Shiki 12 Senchi 7 Kokakuho) 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. It was used as the primary armament of the Matsu-class destroyers. 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 89s.

Notes

  1. Campbell, Naval Weapons of WWII, p.193.

References

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

External links

Japanese naval weapons of the Second World War
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