French submarine Y

Y

Profile and plan views of Y's hull, detailing the torpedo system
Class overview
Name	Y
Operators	French Navy
Preceded by	Z
Succeeded by	Aigrette class
Built	1902–1905
In service	1905–1909
Completed	1
History
Ordered	12 August 1901
Builder	Arsenal de Toulon
Laid down	22 May 1902
Launched	24 July 1905
Commissioned	25 July 1905 (for trials)
Decommissioned	1 March 1909
Stricken	22 April 1909
Fate	Sold for scrap, 2 August 1911
General characteristics
Type	Experimental submarine
Displacement	213 long tons (216 t) (surfaced) 226 long tons (230 t) (submerged)
Length	44.9 m (147 ft 4 in)
Beam	3 m (9 ft 10 in)
Draught	2.75 m (9 ft)
Installed power	1 × diesel engine (250 hp (186 kW))
Propulsion	1 × variable-pitch propeller
Speed	10 knots (19 km/h; 12 mph) (surfaced) 6 knots (11 km/h; 6.9 mph) (submerged)
Complement	15 men
Armament	2 × 450 mm (17.7 in) bow torpedo tubes 2 × 450 mm (17.7 in) Drzewiecki drop collar torpedo launchers 1 × 450 mm (17.7 in) external torpedo cradle

The French submarine Y was an experimental submarine built for the French Navy (Marine nationale) in the first decade of the 20th century. She was launched in 1905, but was only commissioned for her sea trials and remained in experimental status because her diesel engine could not be used underwater. A planned refit, which included adding an electric motor and batteries for underwater use in 1907 was cancelled as too expensive. Y was stricken from the navy list in 1909, but was retained for experimental purposes until 1911 when she was sold for scrap.