General-Admiral-class cruiser
General-Admiral
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| Class overview | |
|---|---|
| Operators: |
 Imperial Russian Navy
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| Preceded by: | None |
| Succeeded by: | Minin |
| Built: | 1870–1877 |
| In commission: | 1875–1938 |
| Completed: | 2 |
| Scrapped: | 2 |
| General characteristics (General-Admiral as completed) | |
| Type: | Armored cruiser |
| Displacement: | 5,031 long tons (5,112 t) |
| Length: | 285 ft 10 in (87.1 m) |
| Beam: | 48 ft (14.6 m) |
| Draft: | 24 ft 5 in (7.4 m) |
| Installed power: |
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| Propulsion: | 1 Shaft, 1 compound steam engine |
| Speed: | 12 knots (22 km/h; 14 mph) |
| Range: | 5,900 nmi (10,900 km; 6,800 mi) at 10 knots (19 km/h; 12 mph) |
| Complement: | 482 officers and crewmen |
| Armament: |
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| Armor: | Belt: 5–6 in (127–152 mm) |
The General-Admiral-class ships were a pair of armored cruisers built for the Imperial Russian Navy in the early 1870s. They are generally considered as the first true armored cruisers.
Originally classified as armored corvettes, the General-Admirals were redesignated as semi-armored frigates on 24 March 1875. They were laid out as central battery ironclads with the armament concentrated amidships.
The General-Admiral-class ships were 285 feet 10 inches (87.1 m) long overall. They had a beam of 48 feet (14.6 m) and a draft of 24 feet 5 inches (7.4 m). The ships were designed to displace 4,604 long tons (4,678 t), but displaced 5,031 long tons (5,112 t) as built, an increase of over 400 long tons (410 t). The iron-hulled ships were not fitted with a ram and their crew numbered approximately 482 officers and men.
The ships had a vertical compound steam engine driving a single two-bladed, 20-foot-6-inch (6.25 m) propeller, using steam provided by cylindrical boilers. The number of boilers differed between the sisters. General-Admiral had five that generated a working pressure of 60 psi (414 kPa; 4 kgf/cm2) so that the engine produced 4,772 indicated horsepower (3,558 kW). This gave her during a maximum speed around 12.3 knots (22.8 km/h; 14.2 mph) during her sea trials. Gerzog Edinburgski had four boilers and her engine made 5,590 ihp (4,170 kW) that propelled her at 11.5 knots (21.3 km/h; 13.2 mph).
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