Type 11 75 mm AA Gun
Encyclopedia
The was an anti-aircraft gun used by the Imperial Japanese Army
Imperial Japanese Army
-Foundation:During the Meiji Restoration, the military forces loyal to the Emperor were samurai drawn primarily from the loyalist feudal domains of Satsuma and Chōshū...

 after World War I
World War I
World War I , which was predominantly called the World War or the Great War from its occurrence until 1939, and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918...

. It was the first anti-aircraft gun in Japanese service, but only a small number were produced, and it was superseded by the Type 14 10 cm AA Gun
Type 14 10 cm AA Gun
The was an anti-aircraft gun used by the Imperial Japanese Army after World War I. Only a small number were produced, and it was superseded by the Type 88 75 mm AA Gun in production before the start of World War II.-History and development:...

 and the Type 88 75 mm AA Gun
Type 88 75 mm AA Gun
The was an anti-aircraft gun used by the Imperial Japanese Army during the Second Sino-Japanese War and World War II. It replaced the earlier Type 11 75 mm AA Gun in front line combat service, and at the time was equal in performances to any of its contemporaries in western armies and was...

 in active service before the start of World War II
World War II
World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

.

History and development

Due to combat experience at the Battle of Tsingtao
Battle of Tsingtao
The Siege of Tsingtao was the attack on the German-controlled port of Tsingtao in China during World War I by Imperial Japan and the United Kingdom....

 against the Imperial German
Germany
Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...

 Luftstreitkräfte
Luftstreitkräfte
The Deutsche Luftstreitkräfte , known before October 1916 as Die Fliegertruppen des deutschen Kaiserreiches , or simply Die Fliegertruppen, was the air arm of the Imperial German Army during World War I...

’s fledgling squadron of combat aircraft, planners on the Imperial Japanese Army General Staff quickly realized that this new technology posed a threat which required countermeasures. This evaluation was further reinforced by reports from military observers on the European front in World War I.

The Type 11 75 mm AA Gun was placed into production in 1922, taking design features from a number of overseas design, including the British Vickers QF 3 inch 20 cwt AA gun
QF 3 inch 20 cwt
The QF 3 inch 20 cwt anti-aircraft gun became the standard anti-aircraft gun used in the home defence of the United Kingdom against German airships and bombers and on the Western Front in World War I. It was also common on British warships in World War I and submarines in World War II...

  However, it was expensive to produce and lacked both accuracy and range of fire. Only 44 units were completed before production was terminated.

Design

The Type 11 75 mm AA gun had a single piece Gun barrel
Gun barrel
A gun barrel is the tube, usually metal, through which a controlled explosion or rapid expansion of gases are released in order to propel a projectile out of the end at a high velocity....

 with sliding breech
Breech-loading weapon
A breech-loading weapon is a firearm in which the cartridge or shell is inserted or loaded into a chamber integral to the rear portion of a barrel....

, mounted on a central pedestal. The firing platform was supported by five legs, each of which (along with the central pedestal) had adjustable screwed foot for leveling. It fired a 6.5 kilogram projectile to an effective altitude of 6,650 meters.

Combat record

The Type 11 75 mm AA gun saw limited service with Japanese combat forces during the invasion of Manchuria, Soviet-Japanese Border Wars
Soviet-Japanese Border Wars
The Soviet–Japanese Border Wars were a series of border conflicts between the Soviet Union and Japan between 1932 and 1939.Before Japanese occupation of Manchukuo, the Soviet Union had conflict with China on the border of Manchuria...

 and the Second Sino-Japanese War
Second Sino-Japanese War
The Second Sino-Japanese War was a military conflict fought primarily between the Republic of China and the Empire of Japan. From 1937 to 1941, China fought Japan with some economic help from Germany , the Soviet Union and the United States...

. It was withdrawn from active service prior to the start of the Pacific War
Pacific War
The Pacific War, also sometimes called the Asia-Pacific War refers broadly to the parts of World War II that took place in the Pacific Ocean, its islands, and in East Asia, then called the Far East...

.
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