40 cm/45 Type 94

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40 cm/45 Type 94
File:Yamato battleship under construction.jpg
Yamato under construction.
Type Naval gun
Place of origin Japan
Service history
In service 1940-1945
Used by Imperial Japanese Navy
Wars World War II
Weight 147.3 tonnes
Length OA 21.13 m

Shell separate charges and shell
Calibre 460 mm
Elevation +45/-5 degrees. 10°/s
Traverse 300°, 2°/s
Rate of fire 2 rounds/min
Muzzle velocity 780 m/s
Maximum range 42,000 m at 45° elevation

The Japanese 40 cm/45 Type 94 naval guns were the largest calibre guns ever mounted on any warship. They were actually 46 cm (18.1 in) guns, but were designated 40 cm in an effort to hide their true size.

The built-up guns were mounted as the main armament of the Yamato class battleships that were in service with the Imperial Japanese Navy during World War II. The turrets were mounted in weighed 2,510 tons each, which is about the same tonnage as an average sized destroyer of the era.

The Japanese guns were of a slightly larger caliber than three British 18 inch naval guns built during World War I, although the shells were not as heavy. Britain had later designed the N3 battleship with 18-inch guns but none were built, leaving no Allied naval guns to compare with the Type 94. Unlike other very large guns they could fire special anti-aircraft shells called "Sanshiki" (Beehive).

See also


See also