B 97-class destroyer

Last updated
SMS V 99.jpg
SMS V 99
Class overview
BuildersBlohm & Voss, AG Vulcan
OperatorsWar Ensign of Germany 1903-1918.svg  Imperial German Navy
Succeeded by G 101-class destroyer
Built1914–1915
In commission1915–1939
Completed8
Lost1
Scrapped7
General characteristics
Type Destroyer
Displacement
  • 1,374 t (1,352 long tons) normal
  • 1,843 t (1,814 long tons) deep load
Length98.0 m (321 ft 6 in) oa
Beam9.35 m (30 ft 8 in)
Draught3.39 m (11 ft 1 in)
Installed power40,000 PS (39,000 shp; 29,000 kW)
Propulsion
Speed36 knots (67 km/h; 41 mph)
Range2,620 nmi (4,850 km; 3,020 mi) at 20 knots (37 km/h; 23 mph)
Complement114
Armament

The B 97 class was a class of eight destroyers built for and operated by the Imperial German Navy (Kaiserliche Marine) during the First World War. They served throughout the war, with one being lost in 1915, five being scuttled at Scapa Flow in 1919 and one being transferred to Italy, where it remained in use until 1939.

Contents

Design

As part of its 1912 construction programme, the Imperial Russian Navy placed orders for 22 large modern destroyers (the Orfey-class destroyer) for its Baltic Fleet. In order to speed delivery of these ships, orders for the ship's machinery were placed overseas, including in Germany. The outbreak of the First World War, with Germany declaring war on Russia on 1 August, led to delivery of these machinery sets to be stopped. [1] [2] The AG Vulcan shipyard in Stettin, (now Szczecin in Poland) proposed to use this machinery to power a class of large destroyers for the Imperial German Navy, which could be built within six months. The German navy was at first unenthusiastic about Vulcan's proposal, as its torpedo flotillas consisted of smaller torpedo boats, but Admiral Alfred von Tirpitz overcame these objections, and orders for four ships were placed with Vulcan and Blohm & Voss. Two more ships were ordered from Blohm & Voss in October that year, with a final two ships being ordered in January 1915. [2] [3]

As the new ships were much larger than the existing torpedo craft of the German Navy, they were known as destroyers (Zerstörer) rather than torpedo boats (Torpedoboote). [3] The two shipyards built their destroyers to slightly different designs. The Blohm & Voss built ships were 98.0 metres (321 ft 6 in) long overall and 96.0 metres (315 ft 0 in) at the waterline, with a beam of 9.35 metres (30 ft 8 in). The first two Blohm & Voss ships, B 97 and B 98 had a draught of 3.42 metres (11 ft 3 in) while the later Blohm & Voss ships (B 109, B 110, B 111 and B 112) had a draught of 3.39 metres (11 ft 1 in). Displacement of the Blohm & Voss destroyers was 1,374 tonnes (1,352 long tons) normal and 1,843 tonnes (1,814 long tons) deep load. The two AG Vulcan-built ships (V 99 and V 100) had an overall length of 99.0 metres (324 ft 10 in), a waterline length of 98.0 metres (321 ft 6 in), a beam of 9.36 metres (30 ft 9 in) and a draught of 3.60 metres (11 ft 10 in). They displaced 1,350 tonnes (1,330 long tons) normal and 1,847 tonnes (1,818 long tons) deep load. [4]

Four oil-fired boilers fed steam at 17–18.5  atm (250–272  psi ; 1,720–1,870  kPa ) to 2 sets of steam turbines rated at 40,000 metric horsepower (39,000 shp; 29,000 kW) and driving two propeller shafts. This gave a design speed of 36.5 knots (67.6 km/h; 42.0 mph) for the first four ships and 36 knots (67 km/h; 41 mph) for the last four ships. [4] Speeds during sea trials reached as high as 37.4 knots (69.3 km/h; 43.0 mph). Three funnels were fitted (they were the first three-funneled torpedo craft built for the German Navy). [3] The ships had a range of between 2,250 nautical miles (4,170 km; 2,590 mi) at 20 knots (37 km/h; 23 mph) for the Vulcan-built ships and 2,620 nautical miles (4,850 km; 3,020 mi) at 20 knots for the last four Blohm & Voss-built destroyers. [4] The ships' complement was 114 officers and men when the ships entered service, [3] although this grew to 140 by the end of the war. [2]

As built, the ships' gun armament consisted of four 8.8 cm SK L/45 naval guns in four single mounts. [3] [lower-alpha 1] [lower-alpha 2] These guns could fire a 9 kg (20 lb) high explosive shell a distance of 11,790 m (12,890 yd) at a rate of 15 rounds per minute. 120 rounds per gun were carried. [5] In common with most modern German destroyers, [6] the B 97 class were re-armed in early 1916 by replacing the 8.8 cm guns with four 10.5 cm SK L/45 naval guns, [7] which could fire a 17.4 kg (38 lb) shell to a distance of 9,460 metres (10,350 yd). [8] 80 rounds per gun were carried. [4] Six 50 cm (17.7 in) torpedo tubes were carried, with two fixed tubes just behind the ships' forecastle, and two twin tubes further aft on rotating mounts. [2] (These mounts were splayed out at an angle of 15 degrees, unlike the twin mounts used by British destroyers. [9] ) 24 mines could be carried. [2] [4]

Service

All eight ships entered service during 1915. [10] They were employed in the Baltic Sea, North Sea and the English Channel. [11] V 99 was sunk during a sortie into the Battle of the Gulf of Riga on 16–17 August 1915 with V 100. The two ships ran into several Russian destroyers, which hit V 99 with several shells. In attempting to escape, V 99 ran into a minefield and struck two mines, sinking as a result. [12] Ships of the class took part in the Battle of Jutland, [13] and in Operation Albion, where the Russian destroyer Grom was sunk. [14]

B 98 after having been mined in 1917 Bundesarchiv Bild 134-C2463, Libau, Torpedoboot nach Minentreffer.jpg
B 98 after having been mined in 1917

As a result of the Armistice of 11 November 1918 which ended fighting between the Western Allies and Germany, much of the German High Seas Fleet was ordered in be interned at Scapa Flow in Orkney. B 98 was employed to carry mail between Germany and the interned fleet, and it was noted that the German destroyer had poorer seakeeping than the V-class destroyers used to escort her, with the British ships able to maintain speed in rougher weather. [15] On 21 June 1919, the German Fleet at Scapa Flow was scuttled, including V 100, B 109, B 110, B 111 and B 112. [10] B 98 was carrying out a mail run at the time of the scuttling, and was seized by the British when she arrived at Scapa on 22 June. Whilst under tow (possibly to Rosyth to be broken up) during poor weather B 98 broke free and was driven ashore at the bay of Lopness, Sanday, Orkney. B 98 is recorded as stranding on 17 February 1920. B 98 was largely broken up for scrap some time after her stranding. [16] [10] [17] The scuttled ships were salvaged and scrapped between 1919 and 1926. [10]

Cesare Rossarol, the former B 97 in Italian service RN Cesare Rosaroll.jpg
Cesare Rossarol, the former B 97 in Italian service

The remaining ship, B 97 was allocated to Italy as a war reparation, transferring on 19 September 1920. The Italians re-armed the ship, replacing the four 10.5 cm guns with three 120 mm (4.7 in) guns, with one twin mount forward and a single mount aft, with two 76 mm (3 in) anti aircraft guns added and the two fixed torpedo tubes removed. She was commissioned into the Italian Navy as Cesare Rossarol on 1 December 1924. The ship had its torpedo tubes replaced by 2 twin Italian 450 mm (17.7 in) tubes in 1931, and from 1932 she was used as an experimental ship. She was stricken on 17 January 1939. [18]

Ships

Name [lower-alpha 3] [lower-alpha 4] BuilderLaunched [10] Commissioned [10] Fate.
SMS B 97 Blohm & Voss, Hamburg 15 December 191413 February 1915Allocated to Italy as war reparation 1920.
Commissioned in Italian Navy as Cesare Rossarol on 1 December 1924.
Stricken 17 January 1939. [18]
SMS B 98 Blohm & Voss, Hamburg2 January 191524 March 1915Seized by United Kingdom on 22 June 1919. [4] Went aground in Lopness Bay in 1920 where parts of wreck can still be seen. One gun is on show at the Scapa Flow Museum at Lyness.
SMS V 99 AG Vulcan, Stettin9 February 191520 April 1915Mined following engagement with Russian destroyers in the Battle of the Gulf of Riga on 17 August 1915. [12]
SMS V 100 AG Vulcan, Stettin8 March 191517 June 1915Scuttled at Scapa Flow 21 June 1919. Salvaged 1919 and scrapped 1921. [3] [10]
SMS B 109 Blohm & Voss, Hamburg11 March 19158 June 1915Scuttled at Scapa Flow 21 June 1919. Salvaged and scrapped 1926. [10]
SMS B 110 Blohm & Voss, Hamburg31 March 191526 June 1915Scuttled at Scapa Flow 21 June 1919. Salvaged 1925, scrapped 1926. [3] [10]
SMS B 111 Blohm & Voss, Hamburg8 June 191510 August 1915Scuttled at Scapa Flow 21 June 1919. Salvaged and scrapped 1926. [10]
SMS B 112 Blohm & Voss, Hamburg17 June 19153 September 1915Scuttled at Scapa Flow 21 June 1919. Salvaged and scrapped 1926. [10]

See also

Notes

  1. ↑ SK stands for Schnellfeuerkanone – Quick firing cannon in German
  2. ↑ L/45 refers to the length of the gun's barrel. In this case the barrel was 45 calibres long.
  3. ↑ "SMS" stands for " Seiner Majestät Schiff  ", or "His Majesty's Ship" in German.
  4. ↑ The prefix letter on German torpedo craft indicated the ship's builder. B= Blohm & Voss, V= AG Vulcan. [6]

Citations

  1. ↑ Gardiner & Gray 1985 , pp. 309–310
  2. 1 2 3 4 5 Ruge 1972 , p. 50
  3. 1 2 3 4 5 6 7 Gardiner & Gray 1985 , p. 169
  4. 1 2 3 4 5 6 Gröner 1983 , p. 55
  5. ↑ "German 8.8 cm/45". navweaps.com. 9 August 2009. Retrieved 3 September 2015.
  6. 1 2 Gardiner & Gray 1985 , p. 164
  7. ↑ Ruge 1972 , p. 55
  8. ↑ Gardiner & Gray 1985 , p. 140
  9. ↑ Friedman 2009 , p. 177
  10. 1 2 3 4 5 6 7 8 9 10 11 Gröner 1983 , pp. 55–56
  11. ↑ Ruge 1972 , pp. 65, 67
  12. 1 2 Ruge 1972 , pp. 53–54
  13. ↑ Ruge 1972 , pp. 55–56
  14. ↑ Ruge 1972 , p. 63
  15. ↑ Friedman 2009 , pp. 175, 177
  16. ↑ "Sms B98: West Langamay, Bay Of Lopness, Sanday, Orkney, North Sea". Canmore. Royal Commission on the Ancient and Historical Monuments of Scotland. Retrieved 1 February 2016.
  17. ↑ Moore 1990 , p. 116
  18. 1 2 Gardiner & Gray 1985 , p. 267

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References

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