Bouclier-class destroyer

The Bouclier class consisted of twelve destroyers built between 1910 and 1912 for the French Navy, four of which were lost during the First World War.

The French Navy issued a general specification that required oil-fired boilers, steam turbine propulsion and a uniform armament that allowed individual shipyards the freedom to design their ships as they saw fit.

The turbines were designed to produce 13,000 shaft horsepower (9,700 kW) which was intended to give the ships a speed of 30 knots (56 km/h; 35 mph).

The ships carried 120–160 t (118–157 long tons) of fuel oil which gave them a range of 1,200–1,600 nautical miles (2,200–3,000 km; 1,400–1,800 mi) at cruising speeds of 12–14 knots (22–26 km/h; 14–16 mph).

The extra weight severely overloaded the ships and reduced their operational speed to around 26 knots (48 km/h; 30 mph).