This was one of the famous Obukhovski (OSZ) guns. The prototype gun was tested and accepted into service in 1911. An initial order of 505 guns was placed with OSZ and by the end of 1916 some 225 had been delivered. A further 200 were scheduled to be built in 1917 and an additional 80 in 1918, but it is unknown how many of these guns were actually delivered. In 1921 another 85 guns were ordered from the Perm' factory, but later that order was reduced to 48.
In 1941 there were a total of 146 guns in service. Of these, 49 were in the Baltic Fleet, 30 in the Black Sea Fleet, 30 in the Pacific Fleet, 18 in the Northern Fleet, 9 in the Caspian Flotilla and 6 in the Pinsk Flotilla.
Constructed of A tube which was fastened throughout its length with three cylinders attached while the gun was still hot. Fired fixed ammunition and used a semi-automatic sliding breech block.
Actual bore diameter was 101.6 mm (4.0").
| Designation | 4"/60 (10.2 cm) Pattern 1911 |
|---|---|
| Ship Class Used On | During World War I:
Ukraina Class (rearmed), Finn Class (rearmed), Okhotnik Class (rearmed), Vsadnik Class (rearmed) Novik, Derzkii class, Schastlivyi class, Izyaslav class, Orfei class, Gavriil class, Gadjibey (Ushakov) class Gogland class, Improved Ushakov class DDs. During Russian Civil War
During World War II:
|
| Date Of Design | 1911 |
| Date In Service | 1911 |
| Gun Weight | 2.805 tons (2.850 mt) |
| Gun Length oa | 247.4 in (6.284 m) |
| Bore Length | 240 in (6.096 m) |
| Rifling Length | 208.05 in (5.285 m) |
| Grooves | 24 |
| Lands | N/A |
| Twist | N/A |
| Chamber Volume | 461.3 in3 (7.56 dm3) |
| Rate Of Fire | 12 rounds per minute |
| Type | Fixed |
|---|---|
| Weight of Complete Round | HE mod 1915 1: 66 lbs. (30 kg)
HE mod 1911: 66 lbs. (30 kg) FRAG mod 1915: 66 lbs. (30 kg) Shrapnel: 66.36 lbs. (30.1 kg) Star Shell: 54.01 lbs. (24.5 kg) Diving: 52.03 lbs. (23.6 kg) |
| Projectile Types and Weights | HE mod 1915: 38.58 lbs. (17.5 kg)
HE mod 1911: 38.58 lbs. (17.5 kg) FRAG mod 1915: 38.58 lbs. (17.5 kg) HE mod 1907: 31.13 lbs. (14.12 kg) Shrapnel: 39.02 lbs. (17.7 kg) Star Shell: 33.25 lbs. (15.08 kg) Diving: 34.72 lbs. (15.75 kg) Incendiary: 38.8 lbs. (17.6 kg) |
| Bursting Charge | HE mod 1915: 4.63 lbs. (2.1 kg)
HE mod 1911: 5.29 lbs. (2.4 kg) FRAG mod 1915: 4.15 lbs. (1.88 kg) Shrapnel: 0.48 lbs. (0.218 kg) Star Shell: 0.03 lbs. (0.015 kg) Diving: 6.90 lbs. (3.13 kg) |
| Projectile Length | HE mod 1915: 5 calibers
HE mod 1911: 5 calibers FRAG mod 1915: 5.18 calibers HE mod 1907: 4 calibers Shrapnel: 4.38 calibers Star Shell: 4.7 calibers Diving: 5.14 calibers Incendiary: 4 calibers |
| Propellant Charge | HE mod 1915: 11.46 lbs. (5.2 kg)
HE mod 1911: 11.46 lbs. (5.2 kg) FRAG mod 1915: 11.46 lbs. (5.2 kg) Shrapnel: 11.46 lbs. (5.2 kg) Star Shell: 8.20 lbs. (3.72 kg) Diving: 0.88 lbs. (0.4 kg) Incendiary: 4.74 lbs. (2.15 kg) Cartridge: 27 lbs. (12.3 kg) |
| Muzzle Velocity | HE mod 1915: 2,700 fps (823 mps)
HE mod 1911: 2,700 fps (823 mps) FRAG mod 1915: 2,700 fps (823 mps) HE mod 1907: 3,000 fps (914.4 mps) Shrapnel: 2,520 fps (768 mps) Star Shell: 2,345 fps (715 mps) Diving: 685 fps (208.8 mps) |
| Working Pressure | 15.75 tons/in2 (2,480 kg/cm2) |
| Approximate Barrel Life | 800 rounds |
| Ammunition stowage per gun | Novik: 160 rounds
Gavriil class: 150 rounds Gogland class: 140 rounds Ushakov class: 180 rounds Uragan (Series I): 150 rounds Uragan (Series II): 200 rounds |
- ^There were also chemical (gas) rounds made from the HE mod 1 915.
| Elevation | 38.58 lbs. (17.5 kg) HE mod 1915 | 38.58 lbs. (17.5 kg) HE mod 1911 |
|---|---|---|
| 30 degrees | 17,600 yards (16,100 m) | 16,800 yards (15,360 m) |
| Designation | Open Single Mounts: Metal Factory, Obukhovski Factory |
|---|---|
| Weight | Metal Factory: 5.61 tons (5.7 mt)
Obukhovski Factory: 6.051 tons (6.147 mt) |
| Elevation | Metal Factory: -10 / +30 degrees
Obukhovski Factory: -6 / +20 degrees |
| Elevation Rate | 3 degrees per second |
| Train | 360 degrees |
| Train Rate | 3 degrees per second |
| Gun recoil | 28 in (71 cm) |
| Loading Angle | Any |
"Naval Weapons of World War Two" by John Campbell
"Sovetskie Boevye Korabli 1941-45: IV Vooruzhnie" (Soviet Warships 1941-45: Volume IV Armament) by A.V. Platonov
"Entsiklopedia Otechestvennoi Artillerii" (Encyclopedia of Fatherland (Russian) Artillery) and "Morskaya Artilleriya Rossiyskogo Flota 1867-1922" (Naval Artillery of the Russian Fleet 1867-1922) both by A.V. Shirokorad
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Special help from Vladimir Yakubov
21 May 2006 - Benchmark
12 August 2012 - Updated to latest template
05 August 2014 - Added photograph of Azard
03 September 2025 - Converted to HTML 5 format and added photographs of Finland gun and plaque