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The 28 cm German naval gun was a 283 mm gun used on the Deutschland class "pocket battleships" and the Scharnhorst class battlecruisers.
The first model was the SKC/28 used on the Deutschland class, the Scharnhorst class received a longer barreled version - the SKC/34.
The 283 mm SKC/34 gun was relatively fast loading, compared with other armament of this size. It could deliver a shot every 17 seconds. The ballistic properties of the guns made them effective against the new French Dunkerque class battlecruisers, which had an armored belt 225-283 mm, barbettes of 310-340 mm, at standard fighting distances.
Characteristics of SKC/28 and SKC/34 283 mm shells are in the table below:
| Gun type | Shell type | Length(calibers) | Total weight(kg) |
|---|---|---|---|
| SKC/28 | Armor-piercing | 3.7 | 300 |
| Semi-armor piercing | 4.2 | 300 | |
| Igniting | 4.2 | 300 | |
| SKC/34 | Armor-piercing | 4.4 | 336 |
| Semi-armorpiercing | 4.4 | 316 | |
| Igniting | 4.5 | 315 |
Effectiveness of the guns against armor in different situations:
| Distance[m] | 0 | 7,900 | 15,100 | 18,288 | 27,432 |
|---|---|---|---|---|---|
| Shooting angle[deg] | 0 | 3.3 | 7.4 | 9.7 | 18.7 |
| Shell hitting angle[deg] | 0 | 4.4 | 10.3 | 15.2 | 30.2 |
| Shell velocity at target[m/s] | 890 | 693 | 552 | 496 | 420 |
| Side armor belt penetration[mm] | 604 | 460 | 335 | 291 | 205 |
| Deck armor penetration[mm] | - | 19 | 41 | 48 | 76 |
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