This weapon was used as secondaries on German pre-deadnoughts. During World War I, a number of guns were removed from ships relegated to training duties and were then used as field artillery, rail guns and in coastal batteries.
In World War II these guns were still in use as coastal artillery. They were then supplied with a lighter shell with a larger propellant charge for increased range.
Constructed of A tube, two reinforcing layers and a jacket. Used a horizontally sliding breech mechanism.
Actual bore diameter was 17.26 cm (6.795 in).
|Designation||17 cm/40 (6.75") SK L/40|
|Ship Class Used On||Braunschweig and Deutschland (1904) Classes|
|Date Of Design||about 1904|
|Date In Service||1906|
|Gun Weight||23,700 lbs. (10,750 kg) inc. breech|
|Gun Length||272.8 in (6.930 m)|
|Bore length||242.4 in (6.411 m)|
|Rate Of Fire||6 - 6.7 rounds per minute|
|Projectile Types and Weights||
|Projectile Length||HE L/3,0: about 20.1 in (51 cm)
Common L/3,3: about 22.1 in (56.1 cm)
Shrapnel L/2,7: about 18.1 in (45.9 cm)
|Propellant Charge 1||
|Muzzle Velocity||World War I: 2,789 fps (850 mps)
World War II: 2,871 fps (875 mps)
|Approximate Barrel Life||N/A|
|Ammunition stowage per gun||130 rounds|
- ^These guns, like most large caliber German guns of this era, used a "fore charge" which was propellant in a double bag silk case and a "main charge" which was propellant in a brass case. The brass case helped to seal the breech of the gun. I lack the weight breakdown for the two charges.
|Weight||DrL C/01: 71.8 - 73.8 tons(73 - 75 mt)
MPL C/02 and C/02-04: 23.8 to 24.5 tons (24.2 to 24.9 mt)
|Elevation||Turrets: -5 / +30 degrees
Casemates: -5 / +22 degrees
|Elevation Rate||Drl C/01: 2.2 degrees per second 1|
|Train||about +80 / -80 degrees|
|Train Rate||N/A 1|
- ^Turrets were electrically trained and elevated.
- "Naval Weapons of World War Two" by John Campbell
- "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
- "German Warships of World War I" by John C. Taylor
Special help from Peter Lienau and Dave Alton
- 21 May 2006
- 28 March 2010
- Added picture of Schlesien
- 06 February 2011
- Updated template, added some gun and projectile details
- 22 November 2012
- Added gun, projectile and mounting information
- 06 December 2014
- Redid photograph of Deutschland
- 05 February 2016
- Added photograph of gun being used as field artillery