Heavy Anti-Aircraft
105 mm-SK-C/33
View from above View left side View from fore View from aft

105 mm-SK-C/33 (Heavy Anti-Aircraft)
Gun Characteristics
Designation 105 mm/L65 (4,1") caliber SK C/33
Date of design 1933
Date in service 1935
No. of weapons installed 8 on Bismarck
4 on Tirpitz (until August 1941)
Locations Four forward double mounts (Dop. L. C/31) on Bismarck
Two aft double mounts (Dop. L. C/31) on Tirpitz (until August 1941)
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 meter per second (2.952 feets per second)
Illum - 650 meter 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 27.805 kg (61.300 lbs)
Elevation -8°/+80°
Elevation rate 10° per second
Train 360°
Train rate 8.0° per second
Cross leveling -17°/+17°
Cross leveling rate 5° per second
Note: The Dop. L. C/31 was originally developed for the 88 mm AA gun used on earlier ships. This mounting was later adapted for use with the 105 mm guns.