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14 cm/40 11th Year Type naval gun

Field	Value
name	14 cm/40 11th Year Type naval gun
image	I400gun.jpg
image_size	300
caption	14 cm/40 11th Year Type naval gun aboard Japanese submarine I-400 being inspected by United States Navy personnel.
origin	Empire of Japan
type	Naval gun
is_ranged	YES
is_artillery	YES
service	1922–1945
used_by	Imperial Japanese Navy
wars	World War II
weight	Single Mount: 8600 kg
Twin Mount: 18300 kg
length	5.9 m
part_length	5.6 m (bore length)
cartridge	separate-loading, cased charge
cartridge_weight	38 kg
caliber	14 cm
rate	5 rounds per minute
velocity	700 m/s
max_range	16000 m at +30°
breech	Horizontal sliding breech block
elevation	Single Mount: +30° to −5°
Twin Mount: +40° to −7°

Twin Mount: 18300 kg Twin Mount: +40° to −7°

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°. The appended designation 11th year type refers to the horizontal sliding breech block on these guns. Breech block design began in 1922, or the eleventh year of the Taishō period in the Japanese calendar. The gun fired a projectile 14 cm in diameter, and the barrel was 40 calibers long (barrel length is 14 cm x 40 = 560 centimeters or 220 inches).

World War II

This gun was the weapon used by , along with torpedoes, to sink , on December 7 1941, the first United States Merchant Marine vessel to be sunk after the entry of the United States into World War II. The type was used by I-17 to sink on December 18, 1941, and to bombard the Ellwood Oil Field near Santa Barbara, California on February 23, 1942. It was also used by I-25 for the Bombardment of Fort Stevens in Oregon near the mouth of the Columbia River on June 21, 1942, and by I-26 to shell the Estevan Point lighthouse in British Columbia.

On June 8, 1942, on the coast of New South Wales, Australia, the type was used by I-21 to shell Newcastle and by I-24 to bombard Sydney Harbour.

Similar weapon

A longer-barreled 14 cm/50 3rd Year Type naval gun was used aboard surface ships and for coastal defense. The 40 caliber/11th Year Type guns were intended for use against destroyers, and fired base-fuzed projectiles with thinner shell walls allowing a larger bursting charge than the 50 caliber/3rd Year Type guns for potential use against armored ships. The lower velocity 40 caliber gun had a useful life expectancy of 800 to 1000 effective full charges (EFC) per barrel.

Citations

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Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

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