| 8-inch mortar M1877 | |
|---|---|
.JPG) A M1877 at the National Museum of Military History in Sofia. | |
| Type | Coastal artillery Fortress gun Siege gun |
| Place of origin |  Russian Empire |
| Service history | |
| In service | 1891-? |
| Used by | Russian Empire German Empire Bulgaria Finland |
| Wars | Russo-Japanese War World War I |
| Production history | |
| Designer | Obukhov State Plant |
| Designed | 1877 |
| Manufacturer | Obukhov State Plant Motovilikha Plants[1] |
| Produced | 1891[2] |
| Specifications | |
| Mass | Travel: 8,500 kg (18,700 lb) Combat: 5,856 kg (12,910 lb) |
| Barrel length | 3.4 m (11 ft) L/17 calibers |
| Shell | Separate-loading, bagged charges and projectiles. |
| Shell weight | 78–90 kg (172–198 lb) |
| Caliber | 203 mm (8 in) |
| Breech | Horizontal sliding-block |
| Recoil | Hydro-gravity |
| Carriage | Garrison mount |
| Elevation | 0 to +42°[2] |
| Traverse | Dependent on mount |
| Rate of fire | 1 round every 3 minutes |
| Muzzle velocity | 400 m/s (1,300 ft/s) |
| Maximum firing range | Russian ammunition: 6 km (3.7 mi) German ammunition: 9.6 km (6 mi)[2] |
The 8-inch mortar M1877 was a Russian 203 mm (8 in) coastal, fortress and siege mortar that was used in the Russo-Japanese War and World War I.
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