340mm/45 Modèle 1912 gun
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The 340mm/45 Modèle 1912 gun (13.4 in) was a heavy naval gun of the French Navy. While the calibres of the naval guns of the French Navy were usually very close to those of their British counterparts,[lower-alpha 1] the calibre of 340 mm is specific to the French Navy.
Quick Facts Type, Place of origin ...
340mm/45 Modèle 1912 gun | |
---|---|
Type | Naval gun |
Place of origin | France |
Service history | |
Used by | France |
Wars | First World War Second World War |
Production history | |
Variants | Model 1912M Type C |
Specifications | |
Mass | 66 t (65 long tons; 73 short tons) |
Barrel length | 15.4 m (51 ft) L/45[1] |
Shell | Separate-loading, bagged charge and projectiles |
Shell weight | 382–575 kg (842–1,268 lb)[2] |
Calibre | 340 mm (13.4 in) |
Breech | Welin breech block |
Elevation | Naval: -5° to +15° Coastal: 0 to +50° |
Traverse | Fore and aft: -150° to +150° Q turret: +30 to +150 L/R[2] |
Rate of fire | 2 rpm |
Muzzle velocity | 800 m/s (2,600 ft/s)[1] |
Maximum firing range | Naval: 25–29 km (16–18 mi) at +23° Coastal: 38.7 km (24 mi) at +45°[2] |
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The built-up gun was designed to be carried by the Normandie and Lyon classes in quadruple gun turrets, but no ship of these types was completed as a battleship. They were carried by the Bretagne-class battleships in twin turrets. Some of these guns were used as railway guns and coastal artillery in World War I, also serving in World War II.