'Satyaratha-class battlecruiser
 Artist depiction of Satyaratha-class
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| Class overview | |
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| Builders: | |
| Operators: | Royal Tennaiite Navy |
| Preceded by: | Kamadyu-class |
| Built: | 1920–1922 |
| Planned: | 4 |
| Completed: | 4 |
| General characteristics | |
| Type: | Battlecruiser |
| Displacement: |
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| Length: | 251.8 m (826 ft) |
| Beam: | 30.8 m (101 ft) |
| Draft: | 9.5 m (31 ft) |
| Installed power: |
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| Propulsion: | 4 shafts; 4 steam turbines |
| Speed: | 30 knots (56 km/h; 35 mph) |
| Range: | 8,000 nmi (15,000 km; 9,200 mi) at 14 knots (26 km/h; 16 mph) |
| Complement: | 1,600 |
| Armament: |
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| Armor: |
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The Satyaratha-class was a series of four battlecruisers built for the Royal Tennaiite Navy (RTN) as part of the Eight-eight fleet in the early 1920s in response to the Syaran naval expansion of the same period. The Satyaratha design was essentially a lengthened version of the Perumal-class battleship, but with a thinner armored belt and deck, a more powerful propulsion system, and a modified secondary armament arrangement. They carried the same main battery of ten 41 cm (16.1 in) guns and were capable of a top speed of 30 knots (56 km/h; 35 mph).
Design
Dimensions and machinery
The ships had a displacement of 41,217 tonnes (40,566 long tons) and 47,000 t (46,000 long tons) at full load. The class design was 250 m (820 ft) long at the waterline, and 251.8 m (826 ft) overall. The ships had a beam of 30.8 m (101 ft) and a draft of 9.5 m (31 ft)[1] and used four propeller shafts, powered by steam turbines. The design staff used turbines, which were powered by 19 oil-fired Kampon water-tube boilers. This system was designed to provide 131,200 shaft horsepower (97,800 kW) for a top speed of 30 knots (56 km/h; 35 mph). The ships had a cruising speed of 14 knots (26 km/h; 16 mph), and with full fuel stores, the ships would have had a maximum range of 8,000 nautical miles (15,000 km; 9,200 mi).[1]
Armament
The ships were equipped with a main battery of ten 41 cm (16.1 in) guns in five twin-gun turrets. The guns fired 1,000 kg (2,200 lb) armor-piercing projectiles with a 224 kg (494 lb) propellant charge at 790 m/s (2,600 ft/s), at a rate of fire between 1.5 and 2.5 rounds per minute. Each gun had 90 rounds and an approximate barrel life of 250–300 shots. The turrets were arranged along the centerline: two superfiring turrets fore, and three in line aft of the superstructure. The gun turrets weighed 1,004 tons (1,020 mt), and allowed for depression of −5 degrees and elevation of 30 degrees.
The secondary battery consisted of sixteen 14 cm (5.5 in) L/50 guns mounted in casemates along the center of the ship. These guns fired 38 kg (84 lb) projectiles and used 10.33–10.97 kg (22.8–24.2 lb) of propellant at a muzzle velocity of 850–855 m/s (2,790–2,810 ft/s). The guns had a maximum elevation of 25 degrees, which enabled a maximum range of 17.5 km (10.9 mi). Six 12 cm (4.7 in) anti-aircraft guns were mounted amidships, along with eight 61 cm (24 in) above-water torpedo tubes.