Type U 3 submarine

Last updated
Class overview
Builders Kaiserliche Werft Danzig
OperatorsWar Ensign of Germany 1903-1918.svg  Imperial German Navy
Preceded by U 2
Succeeded by Type U 5
Completed2
Lost0
General characteristics [1]
Displacement
  • 421  t (414 long tons) surfaced
  • 510 t (500 long tons) submerged
Length
Beam5.6 m (18 ft 4 in)
Draught3.05 m (10 ft)
Propulsion
Speed
  • 11.8 knots (21.9 km/h; 13.6 mph) surfaced
  • 9.4 knots (17.4 km/h; 10.8 mph) submerged
Range
  • 1,800  nmi (3,300 km; 2,100 mi) at 12 knots (22 km/h; 14 mph) surfaced
  • 50 nmi (93 km; 58 mi) at 5 knots (9.3 km/h; 5.8 mph)
Complement3 officers, 19 men
Armament

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]

Contents

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. [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]

Ships

Namelaunched [6] commissioned [6] ships sunk [6] Fate [3]
U-3 27 March 190929 May 1909noneSunk on 1 December 1918 whilst under tow to scrapyard.
U-4 18 May 19091 July 1909noneScrapped in 1919

Footnotes

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]

Citations

Bibliography