Engineering:Type U 3 submarine

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Short description: German pre-World War I submarine class

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Type U 3 was a class of u-boats built by the Imperial German Navy in the years before World War I. The two Type U 3 boats were ordered on 13 August 1907 and built at Kaiserliche Werft Danzig and commissioned during 1909. They had more powerful engines than the previous Script error: The function "ship_prefix_templates" does not exist. and were far more reliable.[1] Neither boat saw active service during World War I, with both being used as training boats.

Design

Type U 3s had an overall length of 51.28 m (168 ft 3 in) The boats' beam was 5.60 m (18 ft 4 in), the draught was 3.05 m (10 ft 0 in). The boats displaced 421 tonnes (414 long tons) when surfaced and 510 t (500 long tons) when submerged.[2][3]

Type U 3s were fitted with two Körting 8-cylinder two-stroke paraffin engines with a total of 600 metric horsepower (441 kW; 592 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 11.8 knots (21.9 km/h; 13.6 mph), and 9.4 knots (17.4 km/h; 10.8 mph) when submerged. Cruising range was 3,000 nautical miles (5,600 km; 3,500 mi) at 9 knots (17 km/h; 10 mph) on the surface and 50 nautical miles (93 km; 58 mi) at 4.5 knots (8.3 km/h; 5.2 mph) submerged.[2][3] Constructional diving depth[lower-alpha 1] was 50 m (164 ft 1 in).[4]

The boats were armed with four 45 cm (18 in) torpedo tubes, two fitted in the bow and two in the stern. They carried six C/06 torpedoes instead of the older C/03 torpedo. C/06 torpedoes were slightly larger than the preceding C/03, they had a more powerful propulsion unit and could be fired under an angle.[5] The boats' complement was 3 officers and 19 enlisted.[2][3] Until the end of 1914, the Type U 3 U-boats could be equipped with a rotating Hotchkiss gun, and after 1915 U-3 was occasionally equipped with an extra 5 cm SK L/40 gun.[6][2]

List of Type U 3 boats

Both boats in the class were part of the training u-boat flotilla during World War I and did not see active service. Both were surrendered after the Armistice of 11 November 1918.

Name Launched[7] Commissioned[7] Notes[2]
Script error: The function "ship_prefix_templates" does not exist. 27 March 1909 29 May 1909 Sunk on 1 December 1918 whilst under tow to be broken up.
Script error: The function "ship_prefix_templates" does not exist. 18 May 1909 1 July 1909 Broken up at Kiel in 1919.

Notes

  1. ↑ Constructional diving depth had a safety factor of 2.5, which meant that crushing depth was 2.5 times construction diving depth.[4]

References

  1. ↑ Rössler 1981, p. 22.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 Möller & Brack 2004, p. 22.
  3. ↑ 3.0 3.1 3.2 Gröner 1991, pp. 4–6.
  4. ↑ 4.0 4.1 Rössler 1981, p. 26.
  5. ↑ Rössler 1981, p. 27.
  6. ↑ Herzog 1993, p. 45.
  7. ↑ 7.0 7.1 Herzog 1993, p. 67.

Bibliography

  • 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. 
  • Herzog, Bodo (1993) (in de). Deutsche U-Boote : 1906 - 1966. Erlangen: Müller. ISBN 9783860700365. 
  • 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. 

Template:U-3 class submarines



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