HMS L52 was a late-model L-class submarine built for the Royal Navy during the First World War.

L52 and its successors were modified to maximise the number of 21-inch (53.3 cm) torpedoes carried in the bow.

[3] For surface running, the boats were powered by two 12-cylinder Vickers[4] 1,200-brake-horsepower (895 kW) diesel engines, each driving one propeller shaft.

On the surface, the L class had a range of 4,200 nautical miles (7,800 km; 4,800 mi) at 10 knots (19 km/h; 12 mph).

[2] HMS L52 was laid down on 16 May 1917 by Armstrong Whitworth at their Newcastle-Upon-Tyne shipyard, launched on 18 December 1918, and completed on 18 January 1921.