U-52-class submarine

Class overview
Builders	Austriawerft[1]
Operators	Austro-Hungarian Navy
Preceded by	U-50-class submarine
Succeeded by	U-101-class submarine
Built	1916–1918
Planned	4
Completed	0
Cancelled	2
Scrapped	2
Preserved	0
General characteristics
Type	submarine
Displacement	849 t (936 short tons) surfaced 1,200 t (1,300 short tons) submerged[1]
Length	249 ft 3 in (75.97 m)[1]
Beam	22 ft 10 in (6.96 m)[1]
Draft	11 ft 6 in (3.51 m)[1]
Propulsion	2 × shaft 2 × diesel engines, 2,400 bhp (1,800 kW) total 2 × electric motors, 1,480 shp (1,100 kW) total[1]
Speed	15.75 knots (29.17 km/h) surfaced 9 knots (17 km/h) submerged[1]
Complement	40[1]
Armament	6 × 45 cm (17.7 in) torpedo tubes (4 bow, 2 stern); 9 torpedoes 2 × 10 cm/35 (3.9 in) or 12 cm/35 (4.7 in) deck guns 1 × 8 mm (.323 cal) machine gun[1]

The U-52 class was a class of four ocean-going submarines or U-boats planned for the Austro-Hungarian Navy (German: Kaiserliche und Königliche Kriegsmarine or K.u.K. Kriegsmarine) during World War I. The submarine design was based on the A 6 proposal submitted by Stabilimento Tecnico Triestino (STT) as part of a Navy design competition. STT, under its wartime name of Austriawerft, began construction on the first two boats in 1916, but neither boat was launched or completed before the end of the war. Both incomplete submarines were scrapped after the war ended. Neither of the third and fourth submarines was ever laid down.