Engineering:Type U 13 submarine

Short description: German pre-World War I submarine class

Class overview
Builders:	Kaiserliche Werft Danzig
Operators:	Germany Navy
Preceded by:	Type U 9
Succeeded by:
Completed:	3
Lost:	3
General characteristics
Type:	Submarine
Displacement:	516 t (508 long tons) surfaced 644 t (634 long tons) submerged
Length:	57.88 m (189 ft 11 in)
Beam:	6 m (19 ft 8 in)
Draught:	3.44 m (11 ft 3 in)
Propulsion:	2 shafts 2 × Körting 6-cylinder and 2 × Körting 8-cylinder two stroke paraffin motors with 900 PS (660 kW; 890 shp) 2 × SSW electric motors with 1,040 PS (760 kW; 1,030 shp)
Speed:	14.8 knots (27.4 km/h; 17.0 mph) surfaced 10.7 knots (19.8 km/h; 12.3 mph) submerged
Range:	2,000 nmi (3,700 km; 2,300 mi) at 14 kn surfaced 90 nmi (170 km; 100 mi) at 5 kn submerged
Test depth:	50 m (160 ft)
Complement:	4 officers, 25 men
Armament:	4 × 45 cm (17.7 in) torpedo tubes (2 each bow and stern) with 6 torpedoes

Type U 13 was a class of U-boats built during World War I by the Kaiserliche Marine.

Design

Type U 13s had an overall length of 57.88 m (189 ft 11 in) The boats' beam was 6.00 m (19 ft 8 in), the draught was 3.44 m (11 ft 3 in). The boats displaced 516 tonnes (508 long tons) when surfaced and 644 t (634 long tons) when submerged.

Type U 13s were fitted with two Körting 6-cylinder and two 8-cylinder two-stroke paraffin engines with a total of 1,200 metric horsepower (883 kW; 1,184 bhp) for use on the surface and two SSW double-acting electric motors with a total of 760 kW (1,033 PS; 1,019 shp) for underwater use. These engines powered two shafts, which gave the boats a top surface speed of 14.8 knots (27.4 km/h; 17.0 mph), and 10.7 knots (19.8 km/h; 12.3 mph) when submerged. Cruising range was 4,000 nautical miles (7,400 km; 4,600 mi) at 9 knots (17 km/h; 10 mph) on the surface and 90 nautical miles (170 km; 100 mi) at 5 knots (9.3 km/h; 5.8 mph) submerged. Constructional diving depth was 50 m (164 ft 1 in).

The U-boats were armed with four 45 cm (18 in) torpedo tubes, two fitted in the bow and two in the stern, and carried six torpedoes. The boats' complement was 4 officers and 25 enlisted.

Ships

Name	launched	commissioned	ships sunk	Fate
	16 December 1910	25 April 1912	none	Sunk on 12 August 1914 in the North Sea.
	11 July 1911	25 April 1912	none	Sunk on 5 June 1915 in the North Sea.
	18 September 1911	7 July 1912	none	Sunk on 9 August 1914 in the North Sea.

Bibliography

• Herzog, Bodo (1993) (in de). Deutsche U-Boote : 1906 - 1966. Erlangen: Müller. ISBN 9783860700365. 
• Gröner, Erich; Jung, Dieter; Maass, Martin (1991). German Warships 1815–1945, U-boats and Mine Warfare Vessels. 2. London: Conway Maritime Press. ISBN 0-85177-593-4. 
• Möller, Eberhard; Brack, Werner (2004). The Encyclopedia of U-Boats. London: Chatham. ISBN 1-85367-623-3. 
• Rössler, Eberhard (1981). The U-boat: The evolution and technical history of German submarines. London: Cassell & Co. ISBN 0-304-36120-8.