12-inch/50-caliber Mark 7 gun
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The 12"/50 caliber Mark 7 gun (spoken "twelve-inch-fifty-caliber") was a United States Navy's naval gun that first entered service in 1912. Initially designed for use with the Wyoming class of dreadnought battleships, the Mark 7 also armed the Argentine Navy's Rivadavia-class battleships.[1][2]
Quick Facts Type, Place of origin ...
12"/50 caliber Mark 5 Naval Gun | |
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Type | Naval gun |
Place of origin | United States |
Service history | |
In service | 1912-1952 |
Used by | |
Wars | |
Production history | |
Designer | Bureau of Ordnance |
Designed | 1910 |
Manufacturer | |
No. built |
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Variants | Mods 0–19 |
Specifications | |
Mass |
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Length | 50 ft 7.25 in (15.42 m) |
Barrel length | 49 ft 6.25 in (15.09 m) bore (49.5 calibers) |
Shell | 870 lb (390 kg)armor-piercing |
Caliber | 12 in (305 mm) |
Elevation | -5° to +15° |
Traverse | −150° to +150° |
Rate of fire | 2–3 rounds per minute |
Muzzle velocity |
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Effective firing range | 23,900 yd (21,900 m) at 15° elevation |
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