Used on pre-dreadnoughts of the Kurfürst Friedrich Wilhelm class. The mixture of both L/35 and L/40 guns on these ships shows how centralized fire control was not yet available for these ships, even though they had a "uniform" main battery.
These guns were built from hoops and used a horizontal wedge breech mechanism.
These mountings used hydraulic power with steam pumps as prime movers. The breech mechanisms were hand-worked as was the ramming.
All German 28 cm guns had an actual bore diameter of 28.3 cm (11.1").
|Designation||28 cm/40 (11") MRK L/40|
|Ship Class Used On||Kurfürst Friedrich Wilhelm class|
|Date Of Design||1890|
|Date In Service||1893|
|Gun Weight||97,000 lbs. (44,000 kg) including BM|
|Gun Length oa||440.9 in (11.200 m)|
|Bore Length||409.5 in (10.401 m)|
|Chamber Volume||8,723 in3 (142.9 dm3)|
|Rate Of Fire||about 0.5 rounds per minute|
|Projectile Types and Weights 1||AP L/2,6 2
: 529 lbs. (240 kg)
HE L/2,9 base fuze: 529 lbs. (240 kg)
|Projectile Length||AP L/2,6: 29.0 in (73.6 cm)
HE L/2,9 base fuze: 32.3 in (82.1 cm)
|Propellant Charge 3||World War I: About 161 lbs. (73 kg) RPC 12|
|Muzzle Velocity||2,690 fps (820 mps)|
|Approximate Barrel Life||N/A|
|Ammunition stowage per gun||Kurfürst Friedrich Wilhelm: 60 rounds|
- "Naval Weapons of World War One" by Norman Friedman
- "Conway's All the World's Fighting Ships: 1906-1922" by Randal Gray and Robert Gardiner (Editor)
- "German Warships 1815-1945" by Erich Gröner
- "The Big Gun: Battleship Main Armament 1860-1945" by Peter Hodges
- "Die Geschichte der deutschen Schiffsartillerie" by Paul Schmalenbach