![]() A French post card of X, date unknown. The submarine's bow is on the right. A Jemmapes-class coast-defense ship is in the background.
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Class overview | |
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Name | X |
Operators | ![]() |
Preceded by | Y |
Succeeded by | Aigrette class |
Built | 1903–1905 |
In service | 1905–1913 |
Completed | 1 |
History | |
Ordered | 10 January 1902 |
Builder | Arsenal de Cherbourg |
Laid down | 20 April 1903 |
Launched | 15 November 1904 |
Commissioned | 18 December 1905 |
Decommissioned | 1 June 1913 |
Renamed | Dauphin, 13 February 1911 |
Stricken | 21 May 1914 |
Fate | Sold for scrap, 1922 |
General characteristics | |
Type | Submarine |
Displacement | |
Length | 37.7 m (123 ft 8 in) (o/a) |
Beam | 3.1 m (10 ft 2 in) |
Draught | 2.4 m (7 ft 10 in) |
Installed power | 2 × motor-generators, 230–260 PS (169–191 kW) |
Propulsion | 2 × variable-pitch propellers |
Speed |
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Range |
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Complement | 15 men |
Armament |
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X was an experimental submarine built for the French Navy (Marine nationale) during the first decade of the 20th century. Designed by Gaston Romazzotti, she was shaped like the letter Y with two sterns, making her the first submarine with two propeller shafts. The boat was completed in 1905 and spent the next two years conducting her sea trials. X was renamed Dauphin (Dolphin) in 1911. Her internal-combustion engines proved unreliable and she was decommissioned in 1913 and struck from the navy list the following year. The submarine was not used during the First World War and was sold for scrap in 1922.