QF 4-inch naval gun Mk IV, XII, XXII
| QF 4 inch Mk IV, XII, XXII | |
 Mk-IV gun of the HMS Lance in the Imperial War Museum, London |
|
| Caliber: | 101.6 mm (4 inch) |
| Barrel length: | 4.064 m (caliber length 40) |
| Weight: | 1250 kg 11,318 kg (Mk XII and XII) (without ammunition) |
| Ammunition supply: | |
| Grenade weight: | 21.5 kg ( HE ) Mk IV 23.7 kg (Mk XII and Mk XXII from 1944) |
| Bullet weight: | 14.1 kg (HE) Mk IV 15.9 kg (Mk XII and Mk XXII from 1944) |
| Elevation range: | Minimum −5 ° maximum + 20 ° |
| Range: | 8780 m to 10,590 m Mk IV 9560 m Mk XII and XXII |
| Turning speed: | only manually |
| Increase speed: | only manually |
| Rate of fire: | approx. 13 rounds / min |
| drive | manually |
The QF 4 inch (102 mm) Mk IV was a British naval gun . The caliber length is 40 (4.064 m). It was introduced in 1911 with a higher rate of fire as the successor to the BL 4 inch Mk VIII gun . It could only be used to combat sea and land targets.
use
The QF 4 inch Mk IV was used to equip many destroyers and also some cruisers of the Royal Navy during the First World War as a standard medium barrel weapon . During the Second World War it was used to arm merchant ships. The variants Mk XII and Mk XXII were used on submarines in both world wars.
Mk IV
The variant Mk IV had a semi-automatically operated shutter. A total of 1141 units were produced, of which 979 were still in use at the beginning of 1939.
units
(List incomplete)
- Sentinel class reconnaissance cruiser (after re-armament)
- Forward class reconnaissance cruiser (after re-armament)
- Pathfinder class reconnaissance cruiser (after re-armament)
- Adventure class reconnaissance cruiser (after re-armament)
- Acasta-class destroyer
- Laforey-class destroyer
- Yarrow M-class destroyer
- Admiralty M-class destroyer
- Thornycroft M-class destroyer
- Hawthorn M-class destroyer
- Medea-class destroyer
- Talisman-class destroyer
- R-class destroyer
- S-class destroyer
- Marksman-class flotilla leader
- Faulknor-class flotilla leader
- Parker-class flotilla leader
Mk XII and Mk XXII
The Mk XII variant was used from 1918 to arm submarines , the Mk XXII was developed for the same purpose from 1944. Both variants had a manually operated lock. These submarine cannons fired heavier projectiles weighing 15.9 kg from the last months of 1944. A total of 112 Mk. XIIs were built, 58 of which were still in service in early 1939. In addition there were 46 Mk. XXII guns.
units
(List incomplete)
- L-class
- Odin class
- Parthian class
- River (or Thames ) class
- Grampus (or Porpoise ) class
- Triton ("T") class
- Some S-class boats
- Some boats of the Amphion ("A" or Acheron ) class
