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Type-11 75mm anti-aircraft gun

The Type 11 75 mm anti-aircraft gun (Jyuichinen-shiki nana-senti-han Yasen Koshaho) was an anti-aircraft gun used by the Imperial Japanese Army after World War I. The Type 11 designation was given to this gun as it was accepted in the 11th year of Emperor Taisho's reign (1922). It was the first anti-aircraft gun in Japanese service, but only a small number were produced, and it was superseded by the Type 14 10 cm gun and the Type 88 75 mm gun in active service before the start of World War II.

The design was started in 1920 (Taisho 9) to combat the experience of the World War I in Qingdao, and also the rapidly developing aircraft, and through the process of practical tests, etc. It was formalized in 1919. In order to hurry up the process, Japan saved the effort of design and tried to share with 38-style field guns as much as possible. The Type 11 75 mm AA gun had a single piece gun barrel with sliding breech, mounted on a central pedestal. The firing platform was supported by five legs, each of which (along with the central pedestal) had an adjustable screwed foot for leveling. It fired a 6.5 kg (14 lb) projectile to an effective altitude of 6,650 m (21,820 ft).

The field type is said to be capable of both placing and removing within a nominal 5 minutes, and is towed by a 4 ton automative cargo vehicle. In addition to the field type, territory type be installed on the fixed gun emplacements, to ground-to-ship combat as coastal artillery there are several derived types such as Fortress pressurized agriculture gun type can take a depression angle so that it can participate.

Already become the performance to outdated at the time of the formality enactment in 1928 (only 44 guns were produced over three years). However, the shooting performance was low, but the functions and peripherals necessary for a high-air gun were all in one form, and it helped to research and operate anti-aircraft shooting tactics during the early days of the plant.

After the appearance of the Type88 77mm High Gun, it was rapidly replaced, and all were retired except for some of the fortification artillery in the Pacific War. It seems that some returned to the line in preparation for the mainland battle, but the details are unknown. It was mounted as the main gun of the temporary armored train in 1933 (Showa 8). The basic structure waas been handed down to the Type-14 Shiba High Gun .