Armament Izumo-class cruiser

cross-section of eight-inch gun turret used six-six fleet armored cruisers

the main armament of six-six fleet armored cruisers 4 armstrong whitworth-built 45-caliber eight-inch guns in twin-gun turrets fore , aft of superstructure. electrically operated turrets capable of 130° rotation left , right, , guns elevated +30° , depressed −5°. each turret accommodated 65 shells, reloaded through doors in turret floor , ship s deck allowed electric winch in turret hoist shells shell room deep in hull. guns manually loaded , had rate of fire 1.2 rounds per minute. 203-millimeter gun fired 250-pound (113.5 kg) armor-piercing (ap) projectiles @ muzzle velocity of 2,500 feet per second (760 m/s) range of 20,000 yards (18,000 m).

crewmen working six-inch guns

the secondary armament consisted of fourteen elswick ordnance company pattern z quick-firing (qf), 40-caliber, six-inch (152 mm) guns. 4 of these guns mounted in armored casemates on main , upper decks, , mounts on upper deck protected gun shields. 100-pound (45.4 kg) ap shells fired @ muzzle velocity of 2,300 feet per second (700 m/s). ships equipped dozen 40-caliber qf 12-pounder 12-cwt guns , 8 qf 2.5-pounder yamauchi guns close-range defense against torpedo boats. former gun fired three-inch (76 mm), 12.5-pound (5.7 kg) projectiles @ muzzle velocity of 2,359 feet per second (719 m/s).

the izumo-class ships equipped 4 submerged 18-inch (457 mm) torpedo tubes, 2 on each broadside. type 30 torpedo had 100-kilogram (220 lb) warhead , 3 range/speed settings: 870 yards (800 m) @ 27 knots (50 km/h; 31 mph), 1,100 yards (1,000 m) @ 23.6 knots (43.7 km/h; 27.2 mph) or 3,300 yards (3,000 m) @ 14.2 knots (26.3 km/h; 16.3 mph).

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