| QF 4.7 inch Gun Mk V | |
| Origin: | United Kingdom Japan |
| Type: | Naval gun Coast defence gun |
| Is Artillery: | yes |
| Is Ranged: | yes |
| Is Explosive: | yes |
| Is Uk: | yes |
| Service: | 1900–1945 |
| Used By: | British Empire |
| Wars: | World War I World War II |
| Designer: | Elswick Ordnance |
| Design Date: | ca. 1895 |
| Variants: | Mark V, Mark V* |
| Weight: | Barrel & breech 5936lb[1] |
| Part Length: | 212.6inches (45 cal) |
| Cartridge: | Separate loading QF 45lb Common Pointed, Lyddite |
| Caliber: | 4.724inches |
| Rate: | Approx. 8-10 rounds per minute[2] |
| Velocity: | 2350ft/s[3] |
| Max Range: | 16500yd |
| Breech: | single motion interrupted screw |
| Recoil: | 8 inch |
| Elevation: | -10° to +20°[4] |
The QF 4.7 inch Gun Mark V originated as a 4.7sp=usNaNsp=us 45-calibre naval gun designed by the Elswick Ordnance Company for export customers and known as the Pattern Y.[5]
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.[1] In World War I the UK acquired 620 [2] of a version manufactured in Japan, and mounted them as anti-submarine guns on merchant ships and troop ships, under the designation Mark V*. Many of these guns were used again in World War II on defensively armed merchant ships and troop ships.
See main article: Action of 10 March 1917. On 10 March 1917 the crew of a single gun on the refrigerated cargo liner fought a notable action against the heavily-armed German commerce raider . They managed to set the Möwe on fire and inflicted significant damage before the Otaki was sunk. Otaki's Master Archibald Bisset Smith went down with his ship and was posthumously awarded the Victoria Cross for refusing to surrender his ship.
. Ian V. Hogg. British Artillery Weapons & Ammunition 1914–1918 . London . Ian Allan . 1972.