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Yugoslav torpedo boat T3

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a black and white photograph of a small ship underway
The first of the 250t-class, T-group, 74 T
History
Austria-Hungary
Name78 T
BuilderStabilimento Tecnico Triestino
Laid down22 October 1913
Launched4 March 1914
Commissioned23 August 1914
Out of service1918
FateAssigned to the Kingdom of Serbs, Croats and Slovenes
History
Kingdom of Yugoslavia
NameT3
AcquiredMarch 1921
Out of serviceApril 1941
FateCaptured by Italy
History
Italy
NameT3
AcquiredApril 1941
Out of service16 September 1943
FateCaptured by Germany at Rijeka
History
Third Reich
NameTA48
Acquired16 September 1943
Out of service1945
FateSunk at Trieste by Allied bombing on 20 February 1945
Notescrewed by Croatian sailors
General characteristics
Class and type250t-class, T-group sea-going torpedo boat
Displacementlist error: <br /> list (help)
262 t (258 long tons)
320 t (315 long tons) (full load)
Length58.2 m (190 ft 11 in)
Beam5.7 m (18 ft 8 in)
Draught1.5 m (4 ft 11 in)
Installed powerlist error: <br /> list (help)
5,000–6,000 shp (3,700–4,500 kW)
2 x Yarrow water-tube boilers
Propulsion2-shaft Parsons steam turbine
Speed28 knots (52 km/h; 32 mph)
Range980 nmi (1,810 km; 1,130 mi) at 16 knots (30 km/h; 18 mph)
Complement39 officers and enlisted
Armamentlist error: <br /> list (help)
2 × Škoda 66 mm (2.6 in) L/30 guns
4 × 450 mm (18 in) torpedo tubes
10–12 naval mines

The Yugoslav torpedo boat T3 was a 250t-class, T-group sea-going torpedo boat built for the Austro-Hungarian Navy as 78 T in 1914. She was armed with two Škoda 66 mm (2.6 in) L/30 guns, four 450 mm (18 in) torpedo tubes, and could carry 10–12 naval mines. Crewed by 39 officers and enlisted men, she saw active service during World War I, performing convoy, escort and minesweeping tasks, and anti-submarine operations. Following Austria-Hungary's defeat in 1918, she was allocated to the Navy of the Kingdom of Serbs, Croats and Slovenes, which subsequently became the Royal Yugoslav Navy, and was renamed T3.

During the German-led Axis invasion of Yugoslavia in April 1941, she was captured by the Italians and after her main armament was modernised she served with the Royal Italian Navy under her Yugoslav designation. Following the Italian capitulation in September 1943, she was captured by Germany, and after she was fitted with additional anti-aircraft guns she served with the German Navy as TA48. In German service her crew of 52 consisted entirely of Croatian officers and enlisted men. She was sunk by Allied aircraft in February 1945 while in the port of Trieste.

Background

In 1910, the Austria-Hungary Naval Technical Committee initiated the design and development of a 275-long-ton (279 t) coastal torpedo boat, specifying that it should be capable of sustaining 30 knots (56 km/h) for 10 hours. This specification was based an expectation that the Strait of Otranto, where the Adriatic Sea meets the Ionian Sea, would be blockaded by hostile forces during a future conflict. In such circumstances, there would be a need for a torpedo boat that could sail from the Austro-Hungarian Navy (German: kaiserliche und königliche Kriegsmarine) base at Cattaro to the Strait during darkness, locate and attack blockading ships and return to port before morning. Steam turbine power was selected for propulsion, as diesels with the necessary power were not available, and the Austro-Hungarian Navy did not have the practical experience to run turbo-electric boats. Stabilimento Tecnico Triestino (STT) of Trieste was selected for the contract to build eight vessels, ahead of one other tenderer.[1] The T-group designation signified the builder, STT.[2]

Description and construction

The 250t-class, T-group boats had a waterline length of 58.2 m (190 ft 11 in), a beam of 5.7 m (18 ft 8 in), and a normal draught of 1.5 m (4 ft 11 in). While their designed displacement was 262 tonnes (258 long tons), they displaced about 320 tonnes (310 long tons) fully loaded. The crew consisted of 39 officers and enlisted men. The boats were powered by a Parsons steam turbine driving two propellers, using steam generated by two Yarrow water-tube boilers, one of which burned fuel oil and the other coal. The turbine was rated at 5,000 shp (3,700 kW) with a maximum output of 6,000 shp (4,500 kW)* and designed to reach a top speed of 28 knots (52 km/h; 32 mph). They carried 18 tonnes (18 long tons) of coal and 24 tonnes (24 long tons) of fuel oil,[3] which gave them a range of 980 nmi (1,810 km; 1,130 mi) at 16 knots (30 km/h; 18 mph).[2] The T-group had one funnel rather than the two funnels of the later groups of the class. Despite the specifications of the contract being very close to the requirements for the coastal torpedo boat, the STT boats were classified as sea-going.[1]

The boats were originally to be armed with three Škoda 66 mm (2.6 in)L/30[a] guns, and three 450 mm (18 in) torpedo tubes,[1] but this was changed to two guns and four torpedo tubes before the first boat was completed,[2] in order to standardise the armament with the following F-group. They could also carry 10–12 naval mines. 78 T was the fifth of its class to be completed, and was laid down on 22 October 1913, launched on 4 March 1914, and completed on 23 August 1914. Eight T-group boats were completed between February and December 1914, designated 74 T – 81 T.[2] In 1914, one 8 mm (0.31 in) machine gun was added.[1]

Career

World War I and interwar period

The 250t-class, T-group were the first small Austro-Hungarian Navy boats to use turbines, and this contributed to ongoing problems with the boats. During World War I, 78 T was used for convoy, escort and minesweeping tasks, and anti-submarine operations,[1] She also conducted patrols and supported seaplane raids against the Italian Adriatic coast. Due to inadequate funding, 78 T and the rest of the 250t-class were essentially coastal vessels, despite the original intention that they would be used for "high seas" operations.[4] In 1917, one of the 66 mm (2.6 in) guns on each boat was placed on an anti-aircraft mount.[2]

She survived the war intact,[1] and under the terms of the Treaty of Saint-Germain-en-Laye concluded in September 1919, she was allocated to the Kingdom of Serbs, Croats and Slovenes (KSCS, later Yugoslavia) in 1920, along with three other 250t class, T-group boats, 76 T, 77 T and 79 T, which all served with the Royal Yugoslav Navy (Serbo-Croatian Latin: Kraljevska Jugoslovenska Ratna Mornarica, KJRM; Кpaљeвcкa Југословенска Pатна Морнарица). In KJRM service, 78 T was renamed T3.[2]

World War II

In April 1941, Yugoslavia entered World War II when it was invaded by the German-led Axis powers. At the time of the invasion, T3 was assigned to the Southern Sector of the KJRM's Coastal Defence Command based at the Bay of Kotor, along with her sister ship T1 and a number of minesweepers and other craft.[5] T3 was captured by the Royal Italian Navy (Italian: Regia Marina) and was operated by them under her Yugoslav designation. She was fitted with two 76 mm (3 in) L/30 anti-aircraft guns in place of her 66 mm (2.6 in) guns, but no other significant alterations were made to her.[6]

When the Italians capitulated in September 1943, the German Navy (German: Kriegsmarine) seized T3 in the port of Rijeka and renamed her TA48. During her time in German service she was crewed exclusively by Croatian officers and sailors, and her complement was increased to 52.[1] The Germans fitted her with two single 20 mm (0.79 in) anti-aircraft guns.[7] She was active in the northern Adriatic but saw little action.[8] She was sunk in the port of Trieste by Allied aircraft on 20 February 1945.[1][9][b]

Notes

  1. ^ L/30 denotes the length of the gun. In this case, the L/30 gun is 30 calibre, meaning that the gun was 30 times as long as the diameter of its bore.
  2. ^ Sources conflict on who sank TA48. Gardiner and Lenton state Allied aircraft,[1][10] Chesneau states British aircraft,[9] and Wilmott states US aircraft.[11]

Footnotes

  1. ^ a b c d e f g h i Gardiner 1985, p. 339.
  2. ^ a b c d e f Greger 1976, p. 58.
  3. ^ Jane's Information Group 1989, p. 313.
  4. ^ O'Hara, Worth & Dickson 2013, pp. 26–27.
  5. ^ Niehorster 2013.
  6. ^ Chesneau 1980, p. 304.
  7. ^ Lenton 1975, p. 107.
  8. ^ O'Hara 2013, p. 181.
  9. ^ a b Chesneau 1980, p. 357.
  10. ^ Lenton 1975, p. 110.
  11. ^ Willmott 2010, p. 209.

References

  • Chesneau, Roger, ed. (1980). Conway's All the World's Fighting Ships, 1922–1946. London, England: Conway Maritime Press. ISBN 978-0-85177-146-5. {{cite book}}: Invalid |ref=harv (help)
  • Gardiner, Robert, ed. (1985). Conway's All the World's Fighting Ships, 1906–1921. London, England: Conway Maritime Press. ISBN 978-0-85177-245-5. {{cite book}}: Invalid |ref=harv (help)
  • Greger, René (1976). Austro-Hungarian Warships of World War I. London, England: Allan. ISBN 978-0-7110-0623-2. {{cite book}}: Invalid |ref=harv (help)
  • Jane's Information Group (1989) [1946/47]. Jane's Fighting Ships of World War II. London, England: Studio Editions. ISBN 978-1-85170-194-0. {{cite book}}: Invalid |ref=harv (help)
  • Lenton, H.T. (1975). German Warships of the Second World War. London, England: Macdonald and Jane's. ISBN 978-0-356-04661-7. {{cite book}}: Invalid |ref=harv (help)
  • Niehorster, Dr. Leo (2013). "Balkan Operations Order of Battle Royal Yugoslavian Navy Coastal Defense Command 6th April 1941". Dr. Leo Niehorster. Retrieved 27 January 2015. {{cite web}}: Invalid |ref=harv (help)
  • O'Hara, Vincent (2013). The German Fleet at War, 1939-1945. Annapolis, Maryland: Naval Institute Press. ISBN 978-1-61251-397-3. {{cite book}}: Invalid |ref=harv (help)
  • O'Hara, Vincent; Worth, Richard; Dickson, W. (2013). To Crown the Waves: The Great Navies of the First World War. Annapolis, Maryland: Naval Institute Press. ISBN 978-1-61251-269-3. {{cite book}}: Invalid |ref=harv (help)
  • Willmott, H. P. (2010). The Last Century of Sea Power: From Washington to Tokyo, 1922–1945. Bloomington, Indiana: Indiana University Press. ISBN 978-0-253-35214-9. {{cite book}}: Invalid |ref=harv (help)
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