14 cm/40 11th Year Type naval gun

The 14 cm/40 11th Year Type naval gun was the standard surface battery for Japanese submarine cruisers of World War II. Most carried single guns, but Junsen type submarines carried two. Japanese submarines I-7 and I-8 carried an unusual twin mounting capable of elevating to 40° . Eleventh year type refers to the horizontal sliding breech block on these guns. Breech block design began in 1922 AD, the eleventh year of the Taishō period. The gun fired a projectile 14 centimeters (5.5 in) in diameter, and the barrel was 40 calibers long (barrel length is 14 cm x 40 = 560 centimeters or 220 inches).

Country Name Origin Year
Japan 1922
Country Name Operational Year Retirement Year
Japan 1922 1945 View

Type Naval gun
Place of origin Empire of Japan
Service history
In service 1922–1945
Used by  Imperial Japanese Navy
Wars World War II
Weight 3,900 kilograms (8,598 lb)
Length 5.9 meters (19 ft 4 in)
Barrel length 5.6 meters (18 ft 4 in) (bore length)
Shell separate-loading, brass case
Shell weight 38 kilograms (84 lb)
Caliber 14-centimeter (5.5 in)
Breech Horizontal sliding breech block
Elevation +30°  to -5° 
Rate of fire 5 rounds per minute
Muzzle velocity 700 meters per second (2,300 ft/s)
Maximum firing range 16,000 meters (17,000 yd)

End notes