German submarine U-11 (1935)
German World War II submarine
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German submarine U-11 was a Type IIB U-boat built before World War II for service in Nazi Germany's Kriegsmarine. She was commissioned on 21 September 1935, with Kapitänleutnant Hans-Rudolf Rösing in command. She served in several training flotillas in her 10-year career, but sank or damaged no ships.
U-9, a typical Type IIB boat | |
| History | |
|---|---|
 Nazi Germany | |
| Name | U-11 |
| Ordered | 20 July 1934 |
| Builder | Germaniawerft, Kiel |
| Yard number | 545 |
| Laid down | 6 May 1935 |
| Launched | 27 August 1935 |
| Commissioned | 21 September 1935 |
| Stricken | 5 January 1945, Kiel |
| Fate | Scuttled: 3 May 1945, Kiel Arsenal |
| General characteristics | |
| Class & type | Type IIB coastal submarine |
| Displacement | |
| Length |
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| Beam |
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| Height | 8.60 m (28 ft 3 in) |
| Draught | 3.90 m (12 ft 10 in) |
| Installed power |
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| Propulsion |
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| Speed |
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| Range |
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| Test depth | 80 m (260 ft) |
| Complement | 3 officers, 22 men |
| Armament |
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| Service record | |
| Part of |
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| Identification codes | M 27 219 |
| Commanders |
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| Operations | None |
| Victories | None |
In 1940, U-11 was the first unit to carry out sea trials of a new anechoic tile, which was developed by the Kriegsmarine for reducing a submarines' acoustic signature. This development project was codenamed Alberich after the invisible sorcerer from Germanic mythology.
Design
German Type IIB submarines were enlarged versions of the original Type IIs. U-11 had a displacement of 279 tonnes (275 long tons) when at the surface and 328 tonnes (323 long tons) while submerged. Officially, the standard tonnage was 250 long tons (250 t), however.[1] The U-boat had a total length of 42.70 m (140 ft 1 in), a pressure hull length of 28.20 m (92 ft 6 in), a beam of 4.08 m (13 ft 5 in), a height of 8.60 m (28 ft 3 in), and a draught of 3.90 m (12 ft 10 in). The submarine was powered by two MWM RS 127 S four-stroke, six-cylinder diesel engines of 700 metric horsepower (510 kW; 690 shp) for cruising, two Siemens-Schuckert PG VV 322/36 double-acting electric motors producing a total of 460 metric horsepower (340 kW; 450 shp) for use while submerged. She had two shafts and two 0.85 m (3 ft) propellers. The boat was capable of operating at depths of up to 80–150 metres (260–490 ft).[1]
The submarine had a maximum surface speed of 12 knots (22 km/h; 14 mph) and a maximum submerged speed of 7 knots (13 km/h; 8.1 mph).[1] When submerged, the boat could operate for 35–42 nautical miles (65–78 km; 40–48 mi) at 4 knots (7.4 km/h; 4.6 mph); when surfaced, she could travel 3,800 nautical miles (7,000 km; 4,400 mi) at 8 knots (15 km/h; 9.2 mph). U-11 was fitted with three 53.3 cm (21 in) torpedo tubes at the bow, five torpedoes or up to twelve Type A torpedo mines, and a 2 cm (0.79 in) anti-aircraft gun. The boat had a complement of twentyfive.[1]