Heavy Anti-Aircraft
105 mm-SK-C/37
View from above	View right side	View from fore	View from aft

105 mm-SK-C/37 (Heavy Anti-Aircraft)
Gun Characteristics
Designation	105 mm/L65 (4,1") caliber SK C/37
Date of design	1937
Date in service	1939
No. of weapons installed	8 on Bismarck 16 on Tirpitz (until August 1941 only 12)
Locations	Bismarck: 8 in four aft double mounts (Dop. L. C/37) Tirpitz: Until August 1941, 12 guns in six forward double mounts (Dop. L. C/37). From August 1941, 16 guns in eight double mounts.
Gun weight	4.560 kg (10.053 lbs.)
Gun length oa	6,84 m (269 in)
Length of bore	6,348 m (249,9 in)
Number of grooves	36
Length of rifling	5,531 m (217,8 in)
Chamber volume	7,31 dm³ (446 in³)
Rate of fire	15 rounds per gun per minute
Ammunition
Type	Cartridge - Fixed
Weight of complete round	27,35 kg (60,3 lbs)
Projectile types and weights	AP - 15,8 kg (34,8lbs) HE - 15,1 kg (33,3 lbs) HE - Incendiary - 15.8 kg (34,8 lbs) Illum - 14,7 kg (32,4 lbs)
Bursting charge	NA
Projectile length	N/A - complete round 116,4 cm (45,83 in)
Propellant charge	6,05 kg (13,34 lbs)
Muzzle velocity	AP - N/A HE - 900 meters per second (2.952 feets per second) Illum - 650 meters per second (2.133 feets per second)
Working pressure	2.850 kg/cm² (18 tons/in²)
Approximate barrel life	2.950 rounds
Ammunition Inventory	6.720 rounds in total 400 rounds per gun (designed)
Range
Elevation with 15,1 kg (33,3 lbs) HE Shell
Range at 45°	17.700 m (19.357 yards)
AA ceiling at 80°	12.500 m (41.010 feet)
Mount/Turret Data
Weight	27.055 kg (59.646 lbs)
Elevation	-10°/+80°
Elevation rate	12° per second
Train	360°
Train rate	8.5° per second
Cross leveling	-17°/+17°
Cross leveling rate	8° per second

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