|
These guns were removed from most of ships by 1909 at which time there were attempts by the Naval Ministry to convince the Artillery ministry to use them for coastal defense. However, by then their rate of fire was 1 round every 10 minutes and they were deemed useless. In spite of this, at least 11 of these guns were kept in storage until 1917. |
Russian pre-dreadnought Navarin
|
12"/35 on Chesma |
| Designation | 12"/35 (30.5 cm) Pattern 1886 |
| Ship Class Used On | Chesma class, Georgy Pobedonosets class, Navarin |
| Date Of Design | 1886 Krupp guns
1891 Obukhovski guns |
| Date In Service | 1891 |
| Gun Weight | 56 tons (57 mt) |
| Gun Length oa | 421 in (10.700 m) |
| Bore Length | 385 in (9.770 m) |
| Rifling Length | N/A |
| Grooves | 68 |
| Lands | N/A |
| Twist | N/A |
| Chamber Volume | N/A |
| Rate Of Fire | 1 shot every 2 minutes and 22 seconds |
| Type | Bag |
| Projectile Types and Weights | "Light" shell AP and HE - 731.3 lbs. (331.7
kg)
"Heavy" shell AP and HE - 1,003 lbs. (455 kg) |
| Bursting Charge | "Heavy" HE - 54 lbs. (24.5 kg) |
| Projectile Length | "Light" rounds - about 32.4 in (82.3 cm)
"Heavy" rounds - 50.4 in (128 cm) |
| Propellant Charge | "Light" rounds - 339.5 lbs (154 kg)
"Heavy" rounds - 325 lbs. (147.4 kg) Around 1900 "smokeless charges" of 68.8 kg were introduced. These had the same ballistic result as the older propellants. |
| Muzzle Velocity | "Heavy" round - 2,000 fps (610 mps)
"Light" round - 2,090 fps (637 mps) |
| Working Pressure | N/A |
| Approximate Barrel Life | N/A |
| Elevation | With 731.3 lbs. (331.7 kg) "Light" shell |
| Range @ 6 degrees | 6,600 yards (6,040 m) |
| Range @ 15 degrees | 11,600 yards (10,610 m) |
| Designation | Chesma and Georgy Pobedonosets:
Twin Barbette Mount
Navarin: Twin Turret Mount |
| Weight | Chesma and Georgy Pobedonosets:
157 tons (160 mt)
Navarin: 167 tons (169 mt) |
| Elevation | Chesma and Georgy Pobedonosets:
-2 / +15 degrees
Navarin: -4 / +12.5 degrees |
| Rate of Elevation | N/A |
| Train | Bow barbette on Chesma: +/- 107
degrees
Stern barbette on Chesma: +/- 140 degrees Bow barbette on Georgy Pobedonosets: +/- 100 degrees Stern barbette on Georgy Pobedonosets: +/- 135 degrees Bow turret on Navarin: +/- 121.5 degrees Stern turret on Navarin: +/- 107 degrees |
| Rate of Train | Barbette Mounts: 3 degrees per second
Bow turret on Navarin: 4.6 degrees per second Stern turret on Navarin: 3.5 degrees per second |
| Gun Recoil | Chesma and Georgy Pobedonosets:
39 in (99 cm)
Navarin: 28 in (71 cm) |
| Loading Angle | N/A |