French submarine Bellone

For other ships with the same name, see French ship Bellone.

Unidentified Bellone-class submarine underway at Toulon, 1914–1918
History
France
Name	Bellone
Ordered	August 1912
Builder	Arsenal de Rochefort
Laid down	23 April 1913
Launched	8 July 1914
Commissioned	12 July 1917
Stricken	27 August 1935
Identification	Budget number: Q102
Fate	Sold for scrap, 18 May 1936
General characteristics (as built)
Class & type	Bellone-class submarine
Displacement	540  t (531 long tons) (surfaced) 804 t (791 long tons) (submerged)
Length	60 m (196 ft 10 in) (o/a)
Beam	5.4 m (17 ft 9 in) (deep)
Draft	3.8 m (12 ft 6 in)
Installed power	2 × 820  PS (600  kW; 810  hp) diesel engines 2 × 400  PS (290  kW; 390  hp) electric motors
Propulsion	2 shafts
Speed	15 knots (28 km/h; 17 mph) (surfaced) 8.2 knots (15.2 km/h; 9.4 mph) (submerged)
Range	1,859  nmi (3,443 km; 2,139 mi) at 12 knots (22 km/h; 14 mph) (surfaced) 100 nmi (190 km; 120 mi) at 5 knots (9.3 km/h; 5.8 mph) (submerged)
Complement	28 crew
Armament	2 × internal bow 450 mm (17.7 in) torpedo tubes 2 × external stern 450 mm torpedo tubes 4 × single 450 mm rotating torpedo launchers 1 × single 75 mm (3 in) deck gun

Bellone was the lead ship of her class of three submarines built for the French Navy during World War I. Completed in 1917, she played only a minor role in the war.

Design and description

The Bellone class was built as part of the French Navy's 1912 building program, ^[1] intended as enlarged and faster versions of the Clorinde class. The boats displaced 540 metric tons (530 long tons ) surfaced and 804 t (791 long tons) submerged. They had an overall length of 60 meters (196 ft 10 in), a beam of 5.4 meters (17 ft 9 in), and a draft of 3.8 meters (12 ft 6 in). The crew numbered 28 officers and crewmen. ^[2]

For surface running, the Bellones were powered by a pair of six-cylinder, two-cycle diesel engines, each driving one propeller shaft. The engines were provided by two different manufacturers and were intended to produce a total of 1,800 metric horsepower (1,775  bhp ; 1,324  kW ), but were generally only capable of about 820 PS (809 bhp; 603 kW). During Bellone's sea trials on 12 September 1916, her Chaléassière engines only produced 1,600 PS (1,578 bhp; 1,177 kW), enough for a speed of 15.9 knots (29.4 km/h; 18.3 mph) rather than the designed 17 knots (31 km/h; 20 mph). ^[2] When submerged each shaft was driven by a 400-metric-horsepower (395 shp; 294 kW) electric motor. ^[1] The designed speed underwater was 9.5 knots (17.6 km/h; 10.9 mph). The Bellones carried enough fuel oil to give them a surface endurance of 1,859 nautical miles (3,443 km; 2,139 mi) at 12 knots (22 km/h; 14 mph). Their designed submerged endurance was 100 nmi (190 km; 120 mi) at 5 knots (9.3 km/h; 5.8 mph). ^[2]

The Bellone-class boats were armed with a total of eight 450-millimeter (17.7 in) torpedoes. Two of these were positioned in the bow in internal tubes angled outwards 5° 45'. Four other were located in external rotating torpedo launchers, two on each broadside that could traverse 100–120 degrees to the side of the boats. Two more torpedoes were located in external launchers at the stern angled 5° 10' outwards. The boats were also equipped with a 75 mm (3 in) Mle 1897G deck gun aft of the conning tower. ^{[1] [2] [3]}

Construction and career

Bellone was ordered in August 1912 and was laid down at the Arsenal de Rochefort on 23 April 1912. She was launched on 8 July 1915 and commissioned on 12 July 1917. She was assigned to the Brittany submarine squadron in January 1918 and was still running her trials. ^[2]

Citations

1. Smigielski, p. 211
2. Roberts, p. 451
3. Garier 2000, p. 56

Bibliography

• Couhat, Jean Labayle (1974). French Warships of World War I. London: Ian Allan. ISBN   0-7110-0445-5.
• Garier, Gérard (2002). A l'épreuve de la Grande Guerre. L'odyssée technique et humaine du sous-marin en France (in French). Vol. 3–2. Bourg-en-Bresse, France: Marines édition. ISBN   2-909675-81-5.
• Garier, Gérard (2000). Des Clorinde (1912-1916) aux Diane (1912–1917). L'odyssée technique et humaine du sous-marin en France (in French). Vol. 3–1. Bourg-en-Bresse, France: Marines édition. ISBN   2-909675-54-8.
• Roberts, Stephen S. (2021). French Warships in the Age of Steam 1859–1914: Design, Construction, Careers and Fates. Barnsley, UK: Seaforth Publishing. ISBN   978-1-5267-4533-0.
• Roche, Jean-Michel (2005). Dictionnaire des bâtiments de la flotte de guerre française de Colbert à nos jours 2, 1870 - 2006. Toulon: Roche. ISBN   978-2-9525917-0-6. OCLC   165892922.
• Smigielski, Adam (1985). "France". In Gray, Randal (ed.). Conway's All the World's Fighting Ships 1906–1921. Annapolis, Maryland: Naval Institute Press. pp. 190–220. ISBN   0-87021-907-3.