340mm/28 Modèle 1881 gun
| 340mm/28 Modèle 1881 | |
|---|---|
|  A 340mm/28 Modèle 1881 aboard the Magenta | |
| Type | Naval gun | 
| Place of origin | France | 
| Service history | |
| In service | 1881-1922 | 
| Used by | France | 
| Specifications | |
| Mass | 52.2 t (51.4 long tons; 57.5 short tons)[1] | 
| Length | 9.7 m (32 ft) L/28.5 calibres[1] | 
| Shell | Separate loading bagged charges and projectiles | 
| Shell weight | AP: 420.0 kg (925.9 lb) Common: 350.0 kg (771.6 lb)[1] | 
| Calibre | 340 mm (13 in) | 
| Breech | Interrupted screw | 
| Muzzle velocity | 600 m/s (1,969 ft/s)[1] | 
The 340mm/28 Modèle 1881 gun was a heavy naval gun of the French Navy.
History
The type was used in single mountings on the ironclads of the Marceau class, and on the Hoche.
Railway guns
| Canon de 340 modèle 1881/84 à glissement | |
|---|---|
| Type | Railway gun | 
| Place of origin | France | 
| Service history | |
| In service | 1919-? | 
| Used by |  France | 
| Production history | |
| Designer | Schneider | 
| Designed | 1917 | 
| Manufacturer | Schneider | 
| Produced | 1918 | 
| No. built | 8 | 
| Specifications | |
| Mass | 187 t (184 long tons; 206 short tons) | 
| Barrel length | 9.7 m (32 ft) L/28.5 calibres[2] | 
| Shell | Separate loading bagged charges and projectiles | 
| Shell weight | 430 kg (950 lb) | 
| Caliber | 340 mm (13 in) | 
| Breech | Interrupted screw breech[2] | 
| Recoil | Carriage recoil | 
| Carriage | Two six-axle bogies | 
| Elevation | +3° to +40° | 
| Traverse | None | 
| Rate of fire | 1 round every five minutes | 
| Muzzle velocity | 430 m/s (1,400 ft/s) | 
| Maximum firing range | 19 km (12 mi)[2] | 
Eight guns were converted from naval use to railway guns by Schneider and designated Canon de 340 modèle 1881/84 à glissement. The conversions were ordered during 1917 but they weren't delivered until January 1919 after the war had ended. The guns were suspended from two six-axle rail bogies and used carriage recoil known as the glissement system. The guns had no traverse mechanism so aiming was done by drawing the guns across a section of curved track.[3]
See also
Weapons of comparable role, performance and era
- BL 13.5 inch naval gun Mk I – IV : British equivalent