SM U-109

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History
War Ensign of Germany 1903-1918.svg German Empire
NameU-109
Ordered5 May 1916
Builder Germaniawerft, Kiel
Yard number278
Launched25 September 1917
Commissioned7 November 1917
FateSunk 28 January 1918
General characteristics [1]
Class and type Type U 93 submarine
Displacement
  • 798  t (785 long tons) surfaced
  • 1,000 t (980 long tons) submerged
Length
Beam
  • 6.30 m (20 ft 8 in) (o/a)
  • 4.15 m (13 ft 7 in) (pressure hull)
Height8.25 m (27 ft 1 in)
Draught3.90 m (12 ft 10 in)
Installed power
  • 2 × 2,400  PS (1,765  kW; 2,367  shp) surfaced
  • 2 × 1,200 PS (883 kW; 1,184 shp) submerged
Propulsion2 shafts, 2 × 1.70 m (5 ft 7 in) propellers
Speed
  • 16.4 knots (30.4 km/h; 18.9 mph) surfaced
  • 8.4 knots (15.6 km/h; 9.7 mph) submerged
Range
  • 9,280  nmi (17,190 km; 10,680 mi) at 8 knots (15 km/h; 9.2 mph) surfaced
  • 50 nmi (93 km; 58 mi) at 5 knots (9.3 km/h; 5.8 mph) submerged
Test depth50 m (164 ft 1 in)
Complement4 officers, 32 enlisted
Armament
Service record
Part of:
  • IV Flotilla
  • 24–26 January 1918
Commanders:
  • Kptlt. Otto Ney [2]
  • 7 November 1917 – 26 January 1918
Operations: 1 patrol
Victories: None

SM U-109 [Note 1] was a Type U 93 submarine of the Imperial German Navy in World War I, taking part in the First Battle of the Atlantic. [3] The building contract was confirmed 5 May 1916, and was awarded to Germaniawerft, Kiel. [4] A Type 93 boat, she was launched 25 September 1917 and commissioned 7 November. She was under the command of Otto Ney. On 28 January 1918, she was sunk in the English Channel, possibly by a mine, while diving to avoid ships from the Dover Patrol (particularly drifter H.M. Beryl III). [5] She sank no ships. [3] [6] [7]

Contents

Design

Type U 93 submarines were preceded by the shorter Type U 87 submarines. U-109 had a displacement of 798 tonnes (785 long tons) when at the surface and 1,000 tonnes (980 long tons) while submerged. [1] She had a total length of 71.55 m (234 ft 9 in), a pressure hull length of 56.05 m (183 ft 11 in), a beam of 6.30 m (20 ft 8 in), a height of 8.25 m (27 ft 1 in), and a draught of 3.90 m (12 ft 10 in). The submarine was powered by two 2,400 metric horsepower (1,800 kW; 2,400 shp) engines for use while surfaced, and two 1,200 metric horsepower (880 kW; 1,200 shp) engines for use while submerged. She had two propeller shafts and two 1.70 m (5 ft 7 in) propellers. She was capable of operating at depths of up to 50 metres (160 ft). [1]

The submarine had a maximum surface speed of 16.4 knots (30.4 km/h; 18.9 mph) and a maximum submerged speed of 8.4 knots (15.6 km/h; 9.7 mph). [1] When submerged, she could operate for 50 nautical miles (93 km; 58 mi) at 5 knots (9.3 km/h; 5.8 mph); when surfaced, she could travel 9,280 nautical miles (17,190 km; 10,680 mi) at 8 knots (15 km/h; 9.2 mph). U-109 was fitted with six 50 centimetres (20 in) torpedo tubes (four at the bow and two at the stern), twelve to sixteen torpedoes, one 10.5 cm (4.1 in) SK L/45 deck gun, and one 8.8 cm (3.5 in) SK L/30 deck gun. She had a complement of thirty-six (thirty-two crew members and four officers). [1]

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References

Notes

  1. ↑ "SM" stands for "Seiner Majestät" (English: His Majesty's) and combined with the U for Unterseeboot would be translated as His Majesty's Submarine.

Citations

  1. 1 2 3 4 5 Gröner 1991, pp. 12–14.
  2. ↑ Helgason, Guðmundur. "WWI U-boat commanders: Otto Ney". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 16 March 2015.
  3. 1 2 Helgason, Guðmundur. "WWI U-boats: U 109". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 25 January 2010.
  4. ↑ Rössler, Eberhard, The U-boat: The evolution and technical history of German Submarines, Naval Institute Press, Annapolis, Maryland, 1989, p. 66
  5. ↑ McCartney, Innes (2002). Lost patrols : submarine wrecks of the English Channel. Penzance: Periscope. ISBN   978-1-90438-104-4.
  6. ↑ Gray, Edwyn A., The U-Boat War 1914-1918, Leo Cooper, London, 1994 p. 242
  7. ↑
    • McCartney, Innes (2002). Lost patrols : submarine wrecks of the English Channel. Penzance: Periscope. ISBN   978-1-90438-104-4.

Bibliography

50°53′N1°31′E / 50.883°N 1.517°E / 50.883; 1.517

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