|QF 4.7 inch Gun Mk V|
On troopship SS Orca, March 1919
Coast defence gun
|Place of origin||United Kingdom Japan|
|Used by||British Empire|
|Wars||World War I|
World War II
|Variants||Mark V, Mark V*|
|Weight||Barrel & breech 5,936 pounds (2,693 kg)|
|Barrel length||212.6 inches (5.40 m) (45 cal)|
|Shell||Separate loading QF 45 pounds (20.41 kg) Common Pointed, Lyddite|
|Calibre||120-millimetre (4.72 in)|
|Breech||single motion interrupted screw|
|Muzzle velocity||2,350 feet per second (720 m/s)|
|Maximum range||16,500 yards (15,100 m)|
United Kingdom service
The Royal Navy did not adopt the gun, but several were adopted by the army as coast defence guns around the United Kingdom from 1900 onwards.
Many of these guns were again used in World War II to arm merchant ships and troop ships.
On 10 March 1917 the crew of a single gun on the merchant ship SS Otaki fought a notable action against the heavily-armed German commerce raider SMS Möewe. They managed to set the Möewe on fire and inflicted severe damage before the Otaki was sunk. Otaki's commander Archibald Bisset Smith went down with his ship and was eventually awarded a posthumous Victoria Cross for refusing to surrender his ship.
- Type 3 120 mm 45 caliber naval gun version in service with the Imperial Japanese Navy from 1918
- QF 4.7 inch Gun Mk I - IV 40-calibres version adopted by the Royal Navy
- List of naval guns
- Brixham Battery World War II Emergency Coastal Defence Battery using this gun
- Hogg & Thurston 1972, page 108.
- 2,350 ft/second, firing a 45 lb projectile, using 8 lb 10 oz Cordite MD size 16 propellant. Hogg & Thurston 1972, page 108
- I.V. Hogg & L.F. Thurston (1972). British Artillery Weapons & Ammunition 1914–1918. London: Ian Allan.
- Tony DiGiulian. "British 4.7"/45 (12 cm) QF Mark V and Mark V*". http://navweaps.com/Weapons/WNBR_47-45_mk5.htm.
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