Type 1934A destroyers

Last updated
Paul Jakobi.jpg
Z5 Paul Jacobi c. 1938
Class overview
NameType 1934A destroyer
Builders
Operators
Preceded by Type 1934 destroyer
Succeeded by Type 1936 destroyer
Built1935–1936
In commission1937–1958
Completed12
Lost7
Scrapped5
General characteristics (as built)
Class and type Destroyer
Displacement2,171–2,270 long tons (2,206–2,306 t)
Length
  • 119 m (390 ft 5 in) o/a
  • 116.25 m (381.4 ft) w/l
Beam11.31 m (37 ft 1 in)
Draft4.23 m (13 ft 11 in)
Installed power
Propulsion2 shafts; 2 × steam turbines
Speed36 knots (67 km/h; 41 mph)
Range1,825  nmi (3,380 km; 2,100 mi) at 19 knots (35 km/h; 22 mph)
Complement325
Armament

The Type 1934A destroyers, also known as the Z5 class, were a group of twelve destroyers built in the mid-1930s for Nazi Germany's Kriegsmarine . Five survived the war.

Contents

Design and description

The Type 1934A destroyers were repeats of the Type 1934 class with a modified bow to improve seakeeping that was only partially successful at best. A staukeil, a short keel that had a shallow wedge-shaped cross-section, was added under their transoms, in order to improve their turning circles [1] and raise their sterns at high speed. This had the effect, however, of forcing the bow deeper into the water which aggravated the lack of sheer forward, throwing spray over the bridge, making No. 1 gun impossible to work and the upper deck hazardous to walk upon. A more serious problem was that it caused a continuous sagging force on the hull which required the reinforcement of the amidships hull plates to prevent cracking. They still retained the over-complicated and troublesome boilers of the earlier ships [2]

The ships had an overall length of 119 meters (390 ft 5 in) and were 116.25 meters (381.4 ft) long at the waterline. They had a beam of 11.31 meters (37 ft 1 in), and a maximum draft of 4.23 meters (13 ft 11 in). They displaced 2,171–2,270 long tons (2,206–2,306 t) at standard load and 3,110–3,190 long tons (3,160–3,240 t) at deep load. [3] The destroyers had a metacentric height of 0.79 meters (2 ft 7 in) at deep load. They were divided into 15 watertight compartments of which the middle 7 contained the propulsion and auxiliary machinery and were protected by a double bottom that protected the middle 47% of the ships' length. Active stabilizers were fitted to reduce roll. They had a complement of 10 officers and 315 enlisted men, plus an additional 4 officers and 19 enlisted men if serving as a flotilla flagship. [4]

The Type 1934As were powered by two Wagner geared steam turbine sets, each driving a single three-bladed 3.25-meter (10 ft 8 in) propeller using steam provided by six high-pressure Wagner or Benson water-tube boilers with superheaters. The Wagner boilers had a pressure of 70  kg/cm2 (6,865  kPa ; 996  psi ) and a working temperature of 460  °C (860  °F ) while the Benson boilers used 110  kg/cm2 (10,787  kPa ; 1,565  psi ) at 510 °C (950 °F). The turbines, designed to produce 70,000 metric horsepower (51,000  kW ; 69,000  shp ), were intended to give the ships a speed of 36 knots (67  km/h ; 41  mph ). [4] The Type 1934A carried a maximum of 752 metric tons (740 long tons) of fuel oil which was intended to give a range of 4,400  nmi (8,100 km; 5,100 mi) at 19 knots (35 km/h; 22 mph), but the ships proved top-heavy in service and 30% of the fuel had to be retained as ballast low in the ship. The effective range proved to be only 1,825  nmi (3,380 km; 2,100 mi) at 19 knots (35 km/h; 22 mph). [4] The ships were equipped with two steam-driven 200- kilowatt (270  hp ) turbogenerators, one in each engine room. The first four ships had three diesel generators, two of 60 kW (80 hp) and one of 30 kW (40 hp), while the later ships had three 50 kW (67 hp) generators, [5] all of which were located in a compartment between the two rear boiler rooms. [6]

The Type 1934A ships were armed with five 12.7 cm (5 in) SK C/34 guns [Note 1] in single mounts with gun shields. One pair each was superimposed, fore and aft of the superstructure and the fifth mount was positioned on top of the rear superstructure. They carried 600 rounds of ammunition for these guns, which had a maximum range of 17.4 kilometres (19,000 yd), and could be elevated to 30° and depressed to −10°. Their anti-aircraft armament was made up of four 3.7 cm (1.5 in) SK C/30 anti-aircraft guns in single mounts, with 8,000 rounds of ammunition, and six 2 cm (0.79 in) C/30 anti-aircraft guns in single mounts, with 12,000 rounds of ammunition. The ships carried eight above-water 53.3 cm (21 in) torpedo tubes in two power-operated mounts amidships. [4] Four depth charge throwers were mounted on the sides of the rear deckhouse and they were supplemented by six racks for individual depth charges on the sides of the stern. Sufficient depth charges were carried for either two or four patterns of sixteen charges each. [7] Mine rails could be fitted on the rear deck that had a maximum capacity of sixty mines. [4] 'GHG' (Gruppenhorchgerät) passive hydrophones were fitted to detect submarines. [8]

The Type 34As were equipped with a C/34Z analog fire-control director on the roof of the bridge that calculated the gunnery data using range estimates provided by the two 4-meter (13 ft) stereoscopic rangefinders, one abaft the rear funnel and the other just behind the director. It transmitted the bearing and elevation data to the gun crews and then fired the guns simultaneously. A 1.25-meter (4 ft 1 in) rangefinder provided data to the 3.7 cm AA guns while the 2 cm guns used a hand-held 0.7-meter (2 ft 4 in) rangefinder. [9]

Modifications

The staukeils were removed in 1940–1942 and the stabilizers proved to be ineffective and were replaced by bilge keels as the ships were refitted. A S-Gerät active sonar system was installed on two of the destroyers by the end of 1939 and the rest were supposed to be fitted by the end of 1940. The following year the Type 34As began to receive FuMO 21 [Note 2] search radars and various models of radar detectors. These were installed in a cabin at the rear of the bridge roof, behind the rangefinder, and the radar antenna was positioned on top of the cabin roof, so close to the foremast that it could not fully revolve. The addition of 2.5 t (2.5 long tons) so high up in the ships caused stability problems. To compensate for these additions, the foremast searchlight and the aft rangefinder were removed and the forward rangefinder was replaced by a 3 m (9.8 ft) model, totaling 4.4 t (4.3 long tons). The addition of more depth charges and degaussing equipment more than offset the saving and meant that the motor boat, its derrick and the electric capstan also had to be removed, for a net addition of 3 t (3 long tons) lower in the ships. In mid- to late 1942, the surviving ships had their funnels cut down to reduce top weight. [10]

Beginning in late 1941, the survivors had their light anti-aircraft armament augmented by a single 2 cm quadruple Flakvierling mount that replaced the two guns on the aft superstructure. More 2 cm guns were added over the course of the war and all of the survivors except Z6 Theodor Riedel exchanged a 12.7 cm gun for more 2 cm and 3.7 cm guns in the so-called "Barbara" refit in late 1944. A total of fourteen 3.7 cm and ten 2 cm guns was typical of these ships at war's end, but they varied amongst themselves significantly. Around 1944 the ships had their radars replaced by a FuMO 24 search radar and three of the five of the survivors had their foremasts rebuilt in a goal-post shape to allow the 6-by-2-meter (19.7 ft × 6.6 ft) antenna to fully rotate. A FuMO 63 K Hohentwiel radar replaced the searchlight on its platform abaft the rear funnel and FuMB 1 [Note 3] Metox radar detectors were fitted on all five destroyers. [11]

Ships

List of Type 1934A destroyers
ShipBuilder [12] Laid down [12] Launched [12] Commissioned [12] Fate
Z5 Paul Jacobi DeSchiMAG, Bremen 15 July 193524 March 193629 June 1937Transferred to France, scrapped 1954
Z6 Theodor Riedel 18 July 193522 April 19362 July 1937Transferred to France, scrapped 1958
Z7 Hermann Schoemann 7 September 193516 July 19369 September 1937Sunk while attacking Convoy QP 11, 2 May 1942
Z8 Bruno Heinemann 14 January 193615 September 19368 January 1938Sunk by a mine, 25 January 1942
Z9 Wolfgang Zenker Germaniawerft, Kiel 23 March 193527 March 19362 July 1938Scuttled during the Battles of Narvik, 13 April 1940
Z10 Hans Lody 1 April 193514 May 193613 September 1938Transferred to the United Kingdom, scrapped 1949
Z11 Bernd von Arnim 26 April 19358 July 19366 December 1938Scuttled during the Battles of Narvik, 13 April 1940
Z12 Erich Giese 3 May 193512 March 19374 March 1939Sunk during the Battles of Narvik, 13 April 1940
Z13 Erich Koellner 12 October 193518 March 193728 March 1939
Z14 Friedrich Ihn Blohm & Voss, Hamburg 30 March 19355 November 19356 April 1938Transferred to the Soviet Union, scrapped 1952
Z15 Erich Steinbrinck 30 March 193524 September 193631 May 1938Transferred to the Soviet Union, scrapped 1958
Z16 Friedrich Eckoldt 14 November 193521 March 193728 July 1938Sunk during the Battle of the Barents Sea, 31 December 1942

Service history

The Type 34s spent the prewar years training and showing the flag. Z5 Paul Jacobi and Z8 Bruno Heinemann exercised off the coast of Norway where the latter evaluated 15 cm (5.9 in) guns planned for installation on the Type 1936 destroyers in April 1938. Three months later Z7 Hermann Schoemann hosted Adolf Hitler for a short tour. The following month all of the completed destroyers participated in the August Fleet Review by Hitler and the Regent of Hungary, Admiral Miklós Horthy and the following fleet exercise. Three ships accompanied the heavy cruiser Admiral Graf Spee on her voyage to the Mediterranean in October. Three others were among the escorts for the heavy cruiser Deutschland with Hitler aboard as the Germans occupied Memel, Lithuania, in March 1939. Some of the ships participated in the fleet exercise in the western Mediterranean in April and May. [13]

Notes

  1. ↑ In Kriegsmarine gun nomenclature, SK stands for Schiffskanone (ship's gun), C/32 stands for Constructionjahr (Construction year) 1932
  2. ↑ Funkmess-Ortung (Radio-direction finder, active ranging)
  3. ↑ Funkmess-Beobachtung (Passive radio-direction finder)

Citations

  1. ↑ Gröner, p. 200
  2. ↑ Whitley, pp. 20, 22–24
  3. ↑ Koop & Schmolke, pp. 14, 26
  4. 1 2 3 4 5 Gröner, p. 199
  5. ↑ Koop & Schmolke, p. 44
  6. ↑ Whitley, p. 18
  7. ↑ Whitley, p. 215
  8. ↑ Whitley, pp. 71–72
  9. ↑ Koop & Schmolke, p. 40; Whitley, pp. 68, 71
  10. ↑ Koop & Schmolke, pp. 32, 40, 44; Whitley, pp. 20, 72–73
  11. ↑ Koop & Schmolke, pp. 32, 40; Whitley, pp. 73–75
  12. 1 2 3 4 Koop & Schmolke, p. 24
  13. ↑ Whitley, pp. 79–82

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German destroyer <i>Z37</i> Type 1936A (Mob) destroyer

Z37 was a Type 1936A (Mob) destroyer built for the Kriegsmarine during World War II. Completed in 1942, the ship spent most of her brief career deployed in France. She participated in the Battle of the Bay of Biscay at the end of 1943 before she was accidentally rammed by the destroyer Z32 in early 1944. Towed back to port, the Kriegsmarine decided that Z37 was too badly damaged to repair and disarmed her hulk. Decommissioned later that year, she was scuttled by her crew before being scrapped by the French in 1949.

References

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