Lyon-class battleship

	Plan and left elevation drawing of the Lyon class as depicted in the Journal of United States Artillery
Class overview
Name	Lyon
Builders	France
Operators	French Navy
Preceded by	Normandie class
Succeeded by	Dunkerque class
Planned	4
Completed	0
Cancelled	4
General characteristics
Type	Battleship
Displacement	29,600 t (29,133 long tons)
Length	190 m (623 ft 4 in) (p/p); 194.5 m (638 ft 1 in) (o/a);
Beam	29 m (95 ft 2 in)
Draft	8.65 to 9.2 m (28 ft 5 in to 30 ft 2 in)
Installed power	40,000 CV (39,000 shp)
Propulsion	4 shafts; Mixed steam turbines and triple-expansion steam engines or all-turbine systems;
Speed	21 knots (39 km/h; 24 mph)
Armament	4 × quadruple 34 cm (13.4 in) guns; 24 × single 138.6 mm (5.5 in) guns; 2 × single 47 mm (1.9 in) AA guns; 6 × torpedo tubes (submerged);
Armor	Waterline belt: 300 mm (11.8 in); Deck: 42 or 70 mm (1.7 or 2.8 in); Gun turrets: 300 mm (11.8 in);

The Lyon class was a set of battleships planned for the French Navy (Marine Nationale) in 1913, with construction scheduled to begin in 1915. The class was to have comprised four ships, named Lyon, Lille, Duquesne, and Tourville. The first two were named for cities in France, and the latter pair honored the French admirals Abraham Duquesne and Anne Hilarion de Tourville. The Lyon class' design was an improvement on the previous Normandie class, utilizing a fourth quadruple-gun turret to mount a total of sixteen 34 cm (13.4 in) guns. Construction on the Lyons was cancelled due to the August 1914 outbreak of World War I, before any of the ships were laid down.

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