Type U 9 submarine

Last updated
Class overview
Builders Kaiserliche Werft Danzig
OperatorsWar Ensign of Germany 1903-1918.svg  Imperial German Navy
Preceded by Type U 5
Succeeded by Type U 13
Completed4
Lost3
General characteristics
Displacement
Length
Beam
  • 6 m (19 ft 8 in) (o/a)
  • 3.65 m (12 ft) (pressure hull)
Height7.05 m (23 ft 2 in)
Draught3.13 m (10 ft 3 in)
Installed power
  • 2 × Körting 6-cylinder and 2 × Körting 8-cylinder two stroke paraffin motors with a total of 1,000 PS (740 kW; 990 shp)
  • 2 × SSW electric motors with 1,160 PS (850 kW; 1,140 shp)
  • 550 rpm surfaced
  • 460 rpm submerged
Propulsion
Speed
  • 14.2 knots (26.3 km/h; 16.3 mph) surfaced
  • 8.1 knots (15.0 km/h; 9.3 mph) submerged
Range
  • 1,800 nmi (3,300 km; 2,100 mi) at 14 knots (26 km/h; 16 mph)
  • 80 nmi (150 km; 92 mi) at 5 knots (9.3 km/h; 5.8 mph)
Test depth50 m (160 ft)
Complement4 officers, 25 enlisted
Armament

Type U9 was a class of U-boats built during World War I by the Kaiserliche Marine.

Contents

Design

Type U 9s had an overall length of 57.38 m (188 ft 3 in) The boats' beam was 6.00 m (19 ft 8 in), the draught was 3.65 m (12 ft 0 in). The boats displaced 493 tonnes (485 long tons) when surfaced and 611 t (601 long tons) when submerged. [1]

Type U 9s were fitted with two Körting 6-cylinder and two 8-cylinder two-stroke paraffin engines with a total of 1,000 metric horsepower (735  kW ; 986  bhp ) for use on the surface and two SSW double-acting electric motors with a total of 860 kW (1,169 PS; 1,153 shp) for underwater use. These engines powered two shafts, which gave the boats a top surface speed of 14.2 knots (26.3 km/h; 16.3 mph), and 8.1 knots (15.0 km/h; 9.3 mph) when submerged. Cruising range was 3,250 nautical miles (6,020 km; 3,740 mi) at 9 knots (17 km/h; 10 mph) on the surface and 80 nautical miles (150 km; 92 mi) at 5 knots (9.3 km/h; 5.8 mph) submerged. [1] Constructional diving depth [a] was 50 m (164 ft 1 in). [2]

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. [1]

Ships

Namelaunched [3] commissioned [3] merchant ships sunk
(nbr / GRT ) [3]
warships sunk
( nbr / tons ) [3]
Fate [1]
U-9 22 February 191018 April 191013 / 8.6365 / 44.173Surrendered 16 November 1918. Scrapped at Morecambe in 1919.
U-10 24 January 191131 August 19117 / 1.625noneSunk after 27 May 1916 in the Gulf of Finland.
U-11 2 April 191021 September 1910nonenoneSunk on 9 December 1914 in the English Channel.
U-12 6 May 191013 August 19111 / 3.7381 / 820Sunk on 10 March 1915 in the North Sea.

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. [2]

Citations

Bibliography