21 cm SK L/45
< 21 cm SK L
| 21 cm SK L/45 | |
|---|---|
| Type | Naval gun Railway gun Coastal artillery |
| Place of origin | German Empire |
| Service history | |
| In service | 1909-1945 |
| Used by | German Empire Nazi Germany |
| Wars | World War I World War II |
| Production history | |
| Designer | Krupp |
| Designed | 1905 |
| Manufacturer | Krupp |
| No. built | 16 |
| Variants | 21 cm SK "Peter Adalbert" |
| Specifications | |
| Mass | 16.4 t (18.1 short tons) |
| Length | 9.4 m (30 ft 10 in) |
| Barrel length | 8.8 m (28 ft 10 in) |
| Shell | Separate loading cased ammunition |
| Shell weight | 108–113.5 kg (238–250 lb) |
| Caliber | 210 mm (8.3 in) 45 caliber |
| Breech | Horizontal sliding-wedge breech block |
| Elevation | -5° to +30° |
| Traverse | Forward and aft turrets: -150° to +150° Beam turrets: +30° to +150° |
| Rate of fire | 4-6 rpm |
| Muzzle velocity | 900 m/s (3,000 ft/s) |
| Maximum firing range | Naval: 19 km (12 mi) at +30° Coastal Artillery: 29 km (18 mi) at +45° |
The 21 cm Schnelladekanone Länge 45, abbreviated as 21 cm SK L/45 was a German naval gun developed in the years before World War I that armed the armored cruiser SMS Blücher of the Imperial German Navy. During World War I spare guns were converted to railway guns and later employed as coastal artillery during World War II.