 "Broke" reached a maximum speed of during sea trials.Up to 500 tons of oil fuel could be carried, giving a range of at .The class had a main gun armament consisted of five 4.7 in (120 mm)/45 calibre BL Mark I guns, on CP VI mountings capable of elevating to 30 degrees, arranged in two superfiring pairs fore and aft of the superstructure with the remaining gun positioned on a platform between the funnels.