German Type U 66 submarine
Class overview | |
---|---|
Builders | |
Operators | Imperial German Navy |
Preceded by | German Type U 63 submarine |
Succeeded by | German Type UE I submarine |
Built | 1913–15 |
In commission | 1915–18 |
Completed | 5 |
Lost | 3 |
Scrapped | 2 |
Preserved | 0 |
General characteristics (as U-7 class)[2] | |
Type | submarine |
Displacement |
|
Length | 228 ft (69.50 m) ( o/a ) |
Beam | 20 ft 8 in (6.30 m) |
Draft | 12 ft 5 in (3.79 m) |
Propulsion |
|
Speed |
|
Range |
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Complement | unknown |
Armament |
|
General characteristics (as Type U 66)[3] | |
Type | submarine |
Displacement |
|
Length |
|
Beam |
|
Height | 7.95 m (26 ft 1 in) |
Draft | 3.79 m (12 ft 5 in) |
Installed power |
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Propulsion | 1 × shaft, 1 × 1.80 m (5 ft 11 in) propeller |
Speed |
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Range |
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Test depth | 50 m (160 ft) |
Complement | 4 officers, 32 enlisted men |
Armament |
|
The Type U 66 was a
The Austro-Hungarian Navy, after competitively evaluating six submarines of three foreign designs, selected the Germaniwerft 506d or Type UD design over a design from
After the outbreak of World War I in August 1914, the Austro-Hungarian Navy became convinced that delivery of the still-unfinished submarines to the Mediterranean via Gibraltar would be impossible. As a result, they sold the five boats to the Imperial German Navy in November 1914. The German Navy assigned the numbers U-66 to U-70 to the five submarines and had them redesigned and reconstructed to their specifications. These changes, which included a larger deck gun, increased the displacement of the U-boats by almost 100 tonnes (98 long tons) surfaced and nearly 50 tonnes (49 long tons) submerged.
All five boats saw active service, and four sank 15 or more ships. Only U-68, sunk six days into her first war patrol in March 1916, had no successes. Two other boats, U-66 and U-69 disappeared in 1917. The remaining two U-boats, U-67 and U-70, were surrendered to the United Kingdom and were broken up by 1921.
Background
In 1904, the Austro-Hungarian Navy, after allowing the navies of other countries to pioneer submarine developments,[4] ordered the Austrian Naval Technical Committee (German: Marinetechnisches Komitee or MTK) to produce a submarine design.[5] When the Navy rejected the January 1905 MTK design and other designs submitted as part of a public competition as impracticable, they instead opted to order two submarines each of designs by Simon Lake, Germaniawerft, and John Philip Holland for a competitive evaluation.[4][Note 1]
Based on the trials results, the Austro-Hungarian Navy determined the characteristics that the next generation of Austro-Hungarian submarines should have. They were looking for a
Design
The U-7 class was seen by the Austro-Hungarian Navy as an improved version of its
The boats were designed with five 45 cm (17.7 in) torpedo tubes; four located in the bow, one in the stern. The boats' armament was to also include a single 6.6 cm (2.6 in)/26 deck gun.[3]
Construction
After the Austro-Hungarian Navy's 1 February 1913 order,[3] the first two boats, U-7 and U-8, were laid down at Germaniawerft on 1 November. U-9 was laid down at the end of December, and the final two boats, U-10 and U-11 were both begun in February 1914.[6] Construction of the boats was slated to be complete within 29 to 33 months.[3]
None of the submarines were complete when World War I began in August 1914.[6] With the boats under construction at Kiel, the Austrians became convinced that it would be impossible to take delivery of the boats, which would need to be towed into the Mediterranean past Gibraltar, a British territory.[3][Note 3] As a result, the five boats of the class were transferred to the Imperial German Navy on 28 November 1914 after the advance payment of 2 million Kronen had been returned.[3][Note 4] Germaniawerft was then awarded Kriegsauftrag D, hence the type was known as UD.[3]
After their purchase, the boats were assigned the numbers U-66 to U-70, and the class became known as the U 66 type. The Imperial German Navy had the submarines redesigned and reconstructed to German standards, which increased the surface displacement by 96 tonnes (94 long tons) and the submerged by 48 tonnes (47 long tons). The torpedo load was increased by a third, from 9 to 12, and the deck gun was upgraded from the 6.6 cm (2.6 in) gun originally specified to an 8.8 cm (3.5 in) SK L/30 one.[1]
U-66 was
Service career
All the boats of the U-66 class saw active service, and all but one boat, U-68, had wartime successes; U-69 and U-70 both sank over 100,000 GRT of Allied shipping.[6] U-68 was sunk by the British Q-ship HMS Farnborough in March 1916, and was the first boat of the class to be lost during the war.[1] U-69 and U-66 were lost in July and September 1917, respectively.[7] U-67 and U-70 both survived the war and were surrendered to the United Kingdom in November 1918,[6] and both were broken up by 1921.[1]
Boats in class
SM U-66
U-66, the
SM U-67
U-67 was laid down on 1 November 1913 (yard number 204) by Germaniawerft at Kiel and launched on 15 May 1915. She was commissioned on 4 August 1915 under the command of Korvettenkapitän Erich von Rosenberg-Grusczyski.[11] U-67 sank a total of 17 ships (39,720 GRT) and damaged a further four (19,048 GRT).[12] U-67 was surrendered to the United Kingdom on 20 November 1918 and was broken up at Fareham in 1921.[11]
SM U-68
U-68 was laid down on 31 December 1913 (yard number 205) by Germaniawerft at Kiel and launched on 1 June 1915. She was commissioned on 17 August 1915 under the command of Kapitänleutnant Ludwig Güntzel.[13] Six days into her first war patrol, U-68 encountered the British Q-ship HMS Farnborough (Q-ship number five) off Dingle and was sunk with all hands.[14] U-68 sank no ships during her brief service career.[15]
SM U-69
U-69 was laid down on 7 February 1914 (yard number 206) by Germaniawerft at Kiel and launched on 24 June 1915. She was commissioned on 4 September 1915 under the command of Kapitänleutnant Ernst Wilhelms.
SM U-70
U-70 was laid down on 11 February 1914 (yard number 207) by Germaniawerft at Kiel and launched on 20 July 1915. She was commissioned on 22 September 1915 under the command of Kapitänleutnant Otto Wünsche.[20] During the war, Wünsche and U-70 sank one warship, the British sloop HMS Rhododendron, and 53 civilian ships totaling 137,774 GRT.[21] Among the civilian ships was Southland,[21] at 11,899 GRT, one of the largest ships hit by U-boats during the war.[22] U-70 also damaged five ships of 24,971 GRT. U-70 was surrendered to the British on 20 November 1918 and was broken up at Bo'ness in 1919–20.[11]
Notes
- ^ The Lake design became the Austro-Hungarian U-1 class, the Germaniawerft design became the U-3 class, and the Holland design became the U-5 class.
- ^ The U-3-class submarines, however, were less than half the displacement and nearly 90 feet (27 m) shorter than the U-7 design. See: Gardiner, pp. 342–43.
- ^ The Germaniawerft-built U-3-class boats had been towed from Kiel to Pola via Gibraltar in 1909. See: Sieche, p. 19.
- Straits of Gibraltar, proving that delivery would have been possible after all. See: Gardiner, p. 343.
References
- ^ a b c d Gardiner, p. 177.
- ^ Gardiner, p. 343.
- ^ a b c d e f g h i j Gröner 1991, p. 10.
- ^ a b c d Gardiner, p. 340.
- ^ Sieche, p. 16.
- ^ a b c d e f Helgason, Guðmundur. WWI U-boats: U 66, WWI U-boats: U 67, WWI U-boats: U 68, WWI U-boats: U 69, WWI U-boats: U 70. U-Boat War in World War I. Uboat.net. Retrieved on 6 December 2008.
- ^ Messimer, pp. 85, 88.
- ^ Helgason, Guðmundur. "WWI U-boats: U 66". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 5 December 2008.
- ^ Helgason, Guðmundur. "Ships hit by U 66". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 6 December 2008.
- ^ Messimer, p. 85.
- ^ a b c Helgason, Guðmundur. "WWI U-boats: U 67". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 5 December 2008.
- ^ Helgason, Guðmundur. "Ships hit by U 67". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 6 December 2008.
- ^ Helgason, Guðmundur. "WWI U-boats: U 68". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 5 December 2008.
- ^ Messimer, pp. 86–87.
- ^ Helgason, Guðmundur. "Ships hit by U 68". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 6 December 2008.
- ^ Helgason, Guðmundur. "WWI U-boats: U 69". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 5 December 2008.
- ^ Helgason, Guðmundur. "Ships hit by U 69". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 6 December 2008.
- ^ Tennent, p. 226.
- ^ Messimer, p. 88.
- ^ Helgason, Guðmundur. "WWI U-boats: U 70". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 5 December 2008.
- ^ a b Helgason, Guðmundur. "Ships hit by U 70". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 6 December 2008.
- ^ Helgason, Guðmundur. "Ships hit during WWI: Largest Ships sunk or damaged". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 6 December 2008.
Bibliography
- Gardiner, Robert, ed. (1985). Conway's All the World's Fighting Ships 1906–1921. OCLC 12119866.
- Gröner, Erich; Jung, Dieter; Maass, Martin (1991). German Warships 1815–1945, U-boats and Mine Warfare Vessels. Vol. 2. Translated by Thomas, Keith; Magowan, Rachel. London: Conway Maritime Press. ISBN 0-85177-593-4.
- Messimer, Dwight R. (2002). Verschollen: World War I U-boat losses. Annapolis, Maryland: Naval Institute Press. OCLC 231973419.
- Sieche, Erwin F. (1980). "Austro-Hungarian Submarines". Warship, Volume 2. Naval Institute Press. OCLC 233144055.
- Tennent, A. J. (2006) [1990]. British Merchant Ships Sunk by U boats in the 1914–1918 War. ISBN 1-904381-36-7.