Difference between revisions of "BL 4.7 inch /45 naval gun"
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Latest revision as of 21:58, 1 July 2010
| BL 4.7 inch (120 mm) 45 calibre naval gun | |
|---|---|
| File:HMAS Stuart Bow 1944 AWM 301350.jpg "B" gun on HMAS Stuart, 1944 | |
| Type | Naval gun |
| Service history | |
| In service | 1918 - 1945 |
| Used by |  United Kingdom
|
| Wars | World War I World War II |
| Production history | |
| Designed | 1917 |
| Variants | Mk I, Mk II |
| Specifications | |
| Barrel length | 5.4 metres (213 in) bore (45 calibres) |
| | |
| Shell | 50 pounds (22.68 kg)[1] |
| Calibre | 120 millimetres (4.724 in) |
| Muzzle velocity | 814 metres per second (2,670 ft/s)[2] |
| Maximum range | 14,450 metres (15,800 yd)[3] |
The BL 4.7 inch 45 calibres gun (actually a metric 120 mm gun) was a British medium-velocity naval gun introduced in 1918 for destroyers, to counter a new generation of heavily-armed destroyers Germany was believed to be developing.
Contents
Description and History
Mk I, of built-up wire-wound construction, went into service beginning in 1918 on destroyers of the new Admiralty type destroyer leader (Scott class) and Thornycroft type leader (Shakespeare class). Some saw service in World War I, but most entered service after the war ended.
It was also mounted on :
- Faulknor class destroyer leaders as re-gunned in 1918
- Thornycroft and Admiralty Modified W Class destroyers completed 1919 - 1920
- Prototype destroyers HMS Ambuscade and HMS Amazon commissioned 1926 & 1927
Mk II was a monobloc-barrel (i.e single-piece, typical of WWII guns) gun of similar performance introduced in World War II to replace the worn-out Mk I guns on surviving ships.
These were the only BL-type 4.7 inch guns in British service, all others have been of the QF-type.
Surviving examples
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See also
Notes
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- Tony DiGiulian, British 4.7"/45 (12 cm) BL Mark I 4.7"/45 (12 cm) BL Mark II
External links
Template:GreatWarBritishNavalWeapons
Template:WWIIBritishCommNavalWeapons
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- ↑ DiGiulian
- ↑ Mk I : 814 m/sec : http://navalhistory.flixco.info/H/72400x53535/8330/a0.htm
- ↑ Mk I : 14450 metres : http://navalhistory.flixco.info/H/72400x53535/8330/a0.htm
