14 cm/40 11th Year Type 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°. The appended designation 11th year type refers to the horizontal sliding breech block on these guns.
14 cm/40 11th Year Type gun
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- Name
- 14 cm/40 11th Year Type naval gun
- Field
- rifled breech loader · naval artillery
- Region
- Empire of Japan
VALÉORINE Encyclopedia
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Documentary summary
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.
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wikidata · Q4549966
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Overview
Overview
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).
Key facts
Key facts
• Name — 14 cm/40 11th Year Type naval gun • 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°
World War II
World War II
This gun was the weapon used by Japanese submarine, along with torpedoes, to sink Cynthia Olson, 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 Emidio 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
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.
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1- naval artilleryTerminology
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14 cm/40 11th Year Type gun is classified as a rifled breech loader or naval artillery. Associated with Empire of Japan. Connected to 1 other published record in the VALÉORINE Encyclopedia.
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The Encyclopedia exists whether or not anything is for sale. Corrections are recorded rather than overwritten, and every version of this record is kept. Published 16 August 2026.
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