[6] Three oil-fed Yarrow boilers raising steam at 250 pounds per square inch (1,700 kPa) fed Brown-Curtis geared steam turbines which developed 27,000 shaft horsepower (20,000 kW), driving two screws for a maximum designed speed of 34 knots (63 km/h; 39 mph).

[5] Valkyrie reached 34.79 knots (64.43 km/h; 40.04 mph) during sea trials, with her engines generating 29,563 shaft horsepower (22,045 kW).

[7] The ship carried 367 long tons (373 t) of oil giving a range of 3,500 nautical miles (6,500 km; 4,000 mi) at 15 knots (28 km/h; 17 mph).

[5] She shipped four Mk V QF (quick fire) 4-inch L/45 guns in four single center-line mounts.

[3] After commissioning Valkyrie joined the 10th Destroyer Flotilla as leader,[8][9] forming part of the Harwich Force, and carrying out offensive sweeps and convoy escort operations.

[11] After repair, Valkyrie joined the 13th Destroyer Flotilla based at Rosyth Dockyard led by the light cruiser Champion.

W. Ward's for scrap as part of a deal in which several laid up warships were traded for the old ocean liner RMS Majestic, which the Admiralty wanted to convert into a training ship.