Tegetthoff-class battleship
SMS Tegetthoff
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| Class overview | |
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| Name: | Tegetthoff class |
| Builders: |
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| Operators: | |
| Preceded by: | Radetzky class |
| Succeeded by: | Ersatz Monarch class |
| In commission: | 1912–18 |
| Completed: | 4 |
| Lost: | 2 |
| Scrapped: | 2 |
| General characteristics | |
| Type: | Dreadnought battleship |
| Displacement: |
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| Length: | 152.20 m (499 ft 4 in) |
| Beam: | 27.30 m (89 ft 7 in) |
| Draft: | 8.90 m (29 ft 2 in) |
| Propulsion: |
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| Speed: | 20 knots (37 km/h; 23 mph) |
| Range: | 4,200 nmi (7,800 km; 4,800 mi) at 10 knots (19 km/h; 12 mph) |
| Complement: | 1,087 |
| Armament: |
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| Armor: |
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The Tegetthoff class (sometimes erroneously named the Viribus Unitis class) was the sole class of dreadnought battleships built for the Austro-Hungarian Navy. Four ships were built, Viribus Unitis, Tegetthoff, Prinz Eugen, and Szent István. Three of the four were built in Trieste; Szent István was built in Fiume, so that both parts of the Dual Monarchy would participate in the construction of the ships. The smaller size of the shipyards in Fiume meant that Szent István was built three years after her sisters, with slightly different characteristics.
The first three ships, Viribus Unitis, Tegetthoff, and Prinz Eugen were joined by their sister in 1915, when they bombarded Italian installations at Ancona. The Tegetthoffs attempted to sortie through the Otranto Barrage with the support of lighter ships in 1918, but failed after Szent István was by chance sunk by a small motor torpedo-boat. In 1918, Viribus Unitis was transferred to Yugoslavia, and sunk early in the morning the next day by Italian frogmen. Tegetthoff and Prinz Eugen were surrendered to Italy and France, respectively.
The ships had an overall length of 152 metres (498 ft 8 in), a beam of 27.90 metres (91 ft 6 in), and a draught of 8.70 metres (28 ft 7 in) at deep load. They displaced 20,000 tonnes (19,684 long tons) at load and 21,689 tonnes (21,346 long tons) at deep load.
The propulsion consisted of four Parsons steam turbines, each of which was housed in a separate engine-room. The turbines were powered by twelve Babcock & Wilcox boilers. The turbines were designed to produce a total of 27,000 shaft horsepower (20,134 kW), which was theoretically enough to attain her designed speed of 20 knots (23 mph; 37 km/h), but no figures from her speed trials are known to exist. She carried 1,844.5 tonnes (1,815.4 long tons) of coal, and an additional 267.2 tonnes (263.0 long tons) of fuel oil that was to be sprayed on the coal to increase its burn rate. At full capacity, she could steam for 4,200 nautical miles (7,800 km; 4,800 mi) at a speed of 10 knots (19 km/h; 12 mph).
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