EOC 10 inch 40 caliber
The EOC 10 inch 40 caliber guns were a family of related guns designed by the Elswick Ordnance Company and produced by Armstrong Whitworth in the 1890s for export customers. EOC 10 inch 40 caliber guns were the primary armament of armored cruisers, ironclads and pre-dreadnought battleships built or refit during the 1890s. These guns and their licensed derivatives armed ships of the Argentine Navy, Imperial Japanese Navy, Regia Marina and Spanish Navy. They served in the Russo-Japanese War, Italo-Turkish War and World War I.
| EOC 10 inch 40 caliber | |
|---|---|
Twin gun turret of an Ammiraglio di Saint Bon-class battleship | |
| Type | Naval gun |
| Place of origin | United Kingdom |
| Service history | |
| In service | 1895–1945 |
| Used by | Argentine Navy Imperial Japanese Navy Regia Marina Spanish Navy |
| Wars | Russo-Japanese War Italo-Turkish War World War I |
| Production history | |
| Designer | Elswick Ordnance Company |
| Designed | 1893 |
| Manufacturer | Elswick Ordnance Company Stabilimenti meccanici di Pozzuoli Kure Naval Arsenal |
| Produced | 1893 |
| Variants | Pattern P Pattern P1 Pattern R Cannone da 254/40 A 1893 Cannone da 254/40 A 1899 10 inch 40 caliber Type 41 25 cm 40 caliber Type 41 |
| Specifications | |
| Mass | 30.5 long tons (31.0 t) |
| Length | 34.6 ft (10.5 m) |
| Barrel length | 33.3 ft (10.1 m) 40 caliber |
| Shell | Separate-loading 85.7 lb (38.9 kg) bagged ballistite charge |
| Shell weight | 480–500 lb (220–230 kg) |
| Caliber | 10.0 inches (254 mm) |
| Elevation | -5° to +20° |
| Traverse | -80° to +80° |
| Rate of fire | About 1.5 rounds per minute |
| Muzzle velocity | 2,460 ft/s (750 m/s) |
| Maximum firing range | 11.2 mi (18.0 km) at +20° |
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