The BL 4.7-inch, 45-caliber gun is a 4.7-inch (120 mm) British naval gun with a 45-gauge barrel. Developed in 1918 to combat heavily armed German destroyers. Consisted in service during the First and Second World Wars.
| BL 4.7 ″ / 45 | |
|---|---|
| BL 4.7-inch, 45-caliber gun | |
 Australian destroyer Stewart nose cannon | |
| Production history | |
| Developed by | 1918 - Mk I 1940 - Mk II |
| Country of Origin |  Great Britain |
| Manufactured, units | Mk I: 184 [1] [note 1] Mk I *: 3 [2] Mk II: 32 [2] |
| Service history | |
| Years of operation | 1918 - 1948 |
| It was in service |  British Navy |
| Characteristics of the instrument | |
| Caliber , mm | 120 mm (4.7 inches) |
| Barrel length, mm / caliber | 212.58 ″ (5400 mm) [3] |
| Projectile weight, kg | 50 pounds (23 kg) [3] |
| Loading principle | split loading |
| Characteristics | |
| Mass of the rotating part, t | |
| The angle of the trunk, ° | thirty |
The only breech-loading 120-mm guns of the British fleet with crankcase loading ( eng. BL, breach loading ). All other 120-mm guns belonged to the so-called "rapid-firing" ( English quick-firing, QF ), using a propellant charge placed in a metal sleeve [1] .
Content
Options
- Mk I - barrel made by wire fastening technology. These guns were armed with leaders of the Scott type, the Shakespeare type , the Eminians of the Falknor type (after rearmament), the modified W type destroyers, and the Embuscade and Emeson experimental destroyers.
- Mk I * - version with a simplified barrel for armament of merchant ships ( eng. DAMS ). Made 3 guns [2] .
- MK II - 1940 model, with a monoblock barrel. Made 32 tools to replace worn guns Mk I [2] .
In addition to the aforementioned types of leaders and emints, guns of this type were installed on the air transport Athena and Engadin , large support ships for the landing party of types LCG (L) 3 and LCG (L), as well as on the French destroyers Uragan and Mistral of the type “ Burrask " in the course of their rearmament in England [1] .
Destroyer guns were placed on open single-gun artillery mounts of types CPVI, CPVI * or CPVI **. All installations provided the angle of elevation of the trunk, equal to 30 ° [2] .
Next type
In 1930, type A destroyers began to operate, armed with a new 120 mm QF 4.7 ″ / 45 Mk IX gun, which had a separate cartridge loading.
Notes
- ↑ 1 2 3 4 5 Friedman, 2011 , 3911.
- ↑ 1 2 Friedman, 2011 , 3905.
Comments
- ↑ NavWeaps gives 187, but 3 Mk I *, mentioned by Norman Friedman, are subtracted from this number
Literature
- Friedman, Norman. Naval Weapons of World War One . - London: Seafort Publishing, 2011. - 320 p. - ISBN 9781848321007 .