28 cm SK L/50 gun

The 28 cm SK L/50 was a German naval gun that was used in World War I and World War II. Originally a naval gun, it was adapted for land service after World War I.

Description
The 28 cm SK L/50 gun weighed 41.5 t, had an overall length of 14.15 m and its bore length was 13.421 m. Although called 28 cm, its actual caliber was 28.3 cm. It used the Krupp horizontal sliding-block, or "wedge", as it is sometimes referred to, breech design rather than the interrupted screw used commonly used in heavy guns of other nations. This required that the propellant charge be loaded in a metal, usually brass, case which provides obturation i.e. seals the breech to prevent escape of the expanding propellant gas.

Naval turrets
In shipboard use, these guns were mounted in twin turrets as the primary battery of three German battlecruisers: the two ships of the _Moltke_ class (SMS Moltke and SMS Goeben) plus SMS Seydlitz, each mounting five of these turrets for a total of ten guns.

Coast defense guns
A C/37 Coastal Mounting was utilised for coastal guns. Battery Coronel at Borkum, Germany mounted four guns and Battery Grosser Kurfürst at Framzelle, France mounted four.