French submarine Joule

History
France
NameJoule
NamesakeJames Prescott Joule
Ordered29 October 1906
BuilderArsenal de Toulon
Laid down20 March 1908
Launched7 September 1911
Commissioned10 May 1912
IdentificationBudget number: Q84
FateSunk by mine, 1 May 1915
General characteristics (as built)
Class & typeBrumaire-class submarine
Displacement
  • 401 t (395 long tons) (surfaced)
  • 548 t (539 long tons) (submerged)
Length50.75 m (166 ft 6 in) (o/a)
Beam5 m (16 ft 5 in)
Draft3.15 m (10 ft 4 in)
Installed power
  • 725 PS (533 kW; 715 bhp) (diesels)
  • 660 PS (490 kW; 650 bhp) (electric motors)
Propulsion
Speed
  • 13 knots (24 km/h; 15 mph) (surfaced)
  • 8.8 knots (16.3 km/h; 10.1 mph) (submerged)
Range
  • 2,000 nmi (3,700 km; 2,300 mi) at 9.6 knots (17.8 km/h; 11.0 mph) (surfaced)
  • 84 nmi (156 km; 97 mi) at 5 knots (9.3 km/h; 5.8 mph) (submerged)
Complement29
Armament
  • 1 × 450 mm (17.7 in) bow torpedo tube
  • 1 × twin 450 mm Drzewiecki drop collar
  • 2 × single 450 mm Drzewiecki drop collars
  • 2 × single external 450 mm torpedo launchers

Joule was one of 16 Brumaire-class submarines built for the French Navy during the first decade of the 20th century. Together with Bernoulli and Joule, she was one of the submarines furthest along in construction when the navy decided to revise the outer hull and superstructure shape of the Brumaires and was completed to the original design.

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