French submarine Mariotte
A postcard of Mariotte on sea trials, Cherbourg, circa 1912. The doors for the Drzewiecki drop collar are open.
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| Class overview | |
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| Name: | Mariotte |
| Operators: |
 French Navy
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| Preceded by: | Archimède |
| Succeeded by: | Amiral Bourgois |
| History | |
 France
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| Name: | Mariotte |
| Namesake: | Edme Mariotte |
| Ordered: | 31 December 1906 |
| Builder: | Arsenal de Cherbourg |
| Laid down: | 30 March 1908 |
| Launched: | 2 February 1911 |
| Commissioned: | 5 February 1913 |
| Identification: | Pennant number: Q74 |
| Nickname(s): | Brosse à dents (toothbrush) |
| Fate: | Scuttled, 26 July 1915 |
| General characteristics | |
| Type: | Submarine |
| Displacement: |
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| Length: | 64.75 m (212 ft 5 in) (p/p) |
| Beam: | 4.3 m (14 ft 1 in) |
| Draft: | 3.82 m (12 ft 6 in), surfaced |
| Depth: | 7.25 m (23 ft 9 in) |
| Installed power: |
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| Propulsion: |
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| Speed: |
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| Range: |
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| Test depth: | 35 m (114 ft 10 in) |
| Complement: | 32 officers and enlisted men |
| Armament: |
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The French submarine Mariotte (Q74) was a submarine built for the French Navy prior to World War I. Intended to accompany the fleet, she was designed for high speed on the surface. Although the navy was unsatisfied with her performance on the surface, the boat had a higher underwater speed than any French submarine before or during the following 35 years. Mariotte was plagued with engine problems during her construction and the navy spent years fixing the various issues before finally commissioning her five years after beginning construction. During the war, she participated in the Dardanelles Campaign, but had to be scuttled after she became entangled in the cables of a minefield on her first attempt to penetrate the Dardanelles.
Mariotte was the winning design in a competition conducted by the Ministère de la Marine (Navy Ministry) in 1906 for a submarine (displacing 530 metric tons (520 long tons) that could accompany a squadron of battleships on the surface and had a submerged range of 100 nautical miles (190 km; 120 mi). The winning design, by Constructor, First Class (Ingénieur de 1ère classe) Charles Radiguer, was optimized for good sea-keeping qualities and high speed with moderate buoyancy, a long, thin hull, and high freeboard. The most unusual feature of his design was the prominent forecastle that was built atop the forward part of the pressure hull, while the rear was virtually awash. This odd configuration gave the boat her nickname of toothbrush (brosse à dents).
The submarine actually displaced slightly more than planned, 545 metric tons (536 long tons) surfaced and 634 metric tons (624 long tons) submerged. She measured 64.75 meters (212 ft 5 in) between perpendiculars and had a beam of 4.3 meters (14 ft 1 in). Mariotte had a maximum draft of 3.82 meters (12 ft 6 in) and had a depth of 7.25 meters (23 ft 9 in) from the bottom of her keel to the top of the conning tower. This latter was faired into the rear of the forecastle. Two lead weights were located in the keel and could be dropped in an emergency.
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Wikipedia