Class overview | |
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Builders | Kaiserliche Werft Danzig |
Operators | ![]() |
Preceded by | U 2 |
Succeeded by | Type U 5 |
Completed | 2 |
Lost | 0 |
General characteristics [1] | |
Displacement | |
Length |
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Beam | 5.6 m (18 ft 4 in) |
Draught | 3.05 m (10 ft) |
Propulsion |
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Speed |
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Range |
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Complement | 3 officers, 19 men |
Armament |
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Type U3 was a class of U-boats built during World War I by the Kaiserliche Marine. The two Type U 3 boats were ordered on 13 August 1907 from the Kaiserliche Werft Danzig. They had more powerfull engines than the previous U 2 and were far more reliable. [2]
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. [3] [1]
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. [3] [1] Constructional diving depth [a] was 50 m (164 ft 1 in). [4]
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 3 officers and 19 enlisted. [3] [1] 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 occasianally equipped with an extra 5 cm SK L/40 gun. [5] [3]
Name | launched [6] | commissioned [6] | ships sunk [6] | Fate [3] |
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U-3 | 27 March 1909 | 29 May 1909 | none | Sunk on 1 December 1918 whilst under tow to scrapyard. |
U-4 | 18 May 1909 | 1 July 1909 | none | Scrapped in 1919 |