BL 5.5-inch Mk I naval gun
Naval gun, Coastal defence / From Wikipedia, the free encyclopedia
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The Breech Loading 5.5-inch Mk I was a naval gun used by the British Royal Navy during both World Wars.
Quick Facts Type, Place of origin ...
BL 5.5-inch Mark I | |
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Type | Naval gun, Coastal defence |
Place of origin | United Kingdom |
Service history | |
In service | 1913–1954 |
Wars | World War I World War II |
Production history | |
Designer | Coventry Ordnance Works |
Designed | 1913 |
Manufacturer | Coventry Ordnance Works |
No. built | 81 |
Specifications | |
Mass | 13,955 lbs (6,330 kg)[2] |
Length | 275 inches (7.0 m) L/50 |
Shell | 82 pounds (37.19 kg) |
Calibre | 5.5-inch (140 mm) |
Breech | Welin breech block with Holmstrom mechanism[3] |
Elevation | -7 degrees to +30 degrees depending on mount[2] |
Rate of fire | 12 rounds per minute |
Muzzle velocity | 2,790 f/s (850 m/s)[2] |
Effective firing range | 17,800 yards (16,300 m) at 30-degree elevation |
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