QF 4.7-inch Mk VIII naval gun

The QF 4.7 inch Gun Mark VIII^[1] was a British naval anti-aircraft gun designed in the 1920s for the Royal Navy. This was the largest caliber fixed ammunition gun ever in service in the RN, though the round was considerably shorter and lighter than the round for the QF 4.5-inch Mk I – V naval gun. It was carried in powered HA XII mountings on the two Nelson-class battleships, two of the three Courageous-class aircraft carriers, the minelayer HMS Adventure, and the Australian seaplane tender HMAS Albatross.^[2]

QF 4.7 inch Gun Mk VIII
One gun on HMS Rodney before 1940
Type	Naval anti-aircraft gun
Place of origin	United Kingdom
Service history
In service	1927–1945
Used by	British Empire
Wars	World War II
Production history
No. built	84
Specifications
Mass	6,636 pounds (3,010 kg)
Barrel length	189 inches (4.8 m) L/40
Shell weight	Complete 76 pounds (34.5 kg) Projectile 50 pounds (22.7 kg)
Calibre	4.724 inches (120 mm)
Elevation	–5° to +90
Traverse	360°
Rate of fire	8–12 rounds per minute
Muzzle velocity	2,457 feet per second (749 m/s)
Maximum firing range	16,160 yards (14,780 m) at 45° 32,000 feet (9,800 m) at 90°

See also

• List of naval anti-aircraft guns

Weapons of comparable role, performance and era

• Type 10 120 mm AA Gun: Japanese equivalent