The French cruiser Sully was one of five armored cruisers of the Gloire class that were built for the French Navy (Marine Nationale) in the early 1900s. Fitted with a mixed armament of 194-millimeter (7.6 in) and 164.7-millimeter (6.5 in) guns, the ships were designed for service with the battle fleet. Completed in 1904, Sully joined her sister ships in the Northern Squadron (Escadre du Nord), although she was transferred to the Far East shortly afterwards. The ship struck a rock in Hạ Long Bay, French Indochina in 1905, only eight months after she was completed, and was a total loss.
Design and description
Right elevation and plan of the Gloire-class armored cruisers
The Gloire-class ships were designed as enlarged and improved versions of the preceding Gueydon class by Emile Bertin. The ships measured 139.78 meters (458 ft 7 in) overall, with a beam of 20.2 meters (66 ft 3 in) and a draft of 7.55 meters (24 ft 9 in). They displaced 9,996 metric tons (9,838 long tons). Their crew numbered 25 officers and 590 enlisted men.[1]
The sisters' propulsion machinery consisted of three vertical triple-expansion steam engines, each driving a single propeller shaft, using steam provided by water-tube boilers, but the types of machinery differed between them. Sully had three-cylinder engines fed by 28 Belleville boilers that were designed to produce a total of 20,500 metric horsepower (15,100 kW) intended to give them a maximum speed of 21 knots (39 km/h; 24 mph). During her sea trials on 23 May 1903, the ship reached 21.41 knots (39.65 km/h; 24.64 mph) from 20,110 metric horsepower (14,790 kW). The cruisers carried enough coal to give them a range of 6,500 nautical miles (12,000 km; 7,500 mi) at a speed of 10 knots (19 km/h; 12 mph).[2]
The Gloire class were the first French armored cruisers to have their waterline armored belt made from Harvey face-hardened armor plates. The belt ranged in thickness from 70 to 150 millimeters (2.8 to 5.9 in). Because of manufacturing limitations, the thinner end plates were nickel steel. Behind the belt was a cofferdam, backed by a longitudinal watertight bulkhead. The upper armored deck met the top of the belt and had a total thickness of 34 millimeters (1.3 in) while the lower armored deck curved down to meet the bottom of the belt and had a uniform thickness of 45 millimeters (1.8 in).[5]
The main-gun turrets were protected by 161 millimeters (6.3 in) of Harvey armor, but their barbettes used 174-millimeter (6.9 in) plates of ordinary steel. The face and sides of the secondary turrets were 92 millimeters (3.6 in) thick and the plates protecting their barbettes were 102 millimeters (4 in) thick. The casemates protecting the 100-millimeter guns also had a thickness of 102 millimeters. The face and sides of the conning tower were 174 millimeters thick.[6]
The ship was sent to French Indochina for her first commission.[7] On 7 February 1905 Sully struck a rock in Hạ Long Bay; her crew was not injured. Her guns and equipment were salvaged, but the ship broke in two and was abandoned as a total loss.[9]
