Tordenskjold-class coastal defence ship

300px Plans of panserskipet Tordenskjold. Note heavy guns in turrets fore and aft, and secondary armament in central battery.
Class overview
Operators:	Royal Norwegian Navy
Preceded by:	None
Succeeded by:	Eidsvold-class coastal defence ship
Built:	1897–1898
In commission:	1898–1948
Completed:	Tordenskjold Harald Haarfagre
Scrapped:	2
General characteristics
Type:	Coastal defence ship
Displacement:	3,858 long tons (3,920 t)
Length:	92.66 m (304 ft 0 in) oa 85.34 m (280 ft 0 in) pp
Beam:	14.78 m (48 ft 6 in)
Draught:	5.38 m (17 ft 8 in)
Installed power:	4,500 ihp (3,356 kW)
Propulsion:	2 × Coal-fired vertical triple-expansion steam engines, 3 horizontal boilers
Speed:	16.9 knots (31.3 km/h; 19.4 mph)
Complement:	245
Armament:	2 × 21 cm (8.3 in)/45 guns 6 × 12 cm (4.7 in)/45 guns 6 × 12-pounder (76 mm)/40 guns 6 × 1-pounder QF guns 2 × 45 cm (18 in) submerged torpedo tubes
Armour:	Harvey armor Belt : 7–4 in (178–102 mm) Turrets : 8–5 in (203–127 mm)

The Tordenskjold class of coastal defence ships was ordered by Norway as part as the general rearmament in the time leading up to the events in 1905 - when Norway broke out of the union with Sweden - the two ships in the class (Tordenskjold and Harald Haarfagre) remained the backbone (alongside the slightly newer Eidsvold class) of the Royal Norwegian Navy until they were considered 'unfit for war' in the mid-1930s.

Description

Designed and built as typical pre-dreadnought battleships, although on a scale more suited to the fjords and narrow waters of Norway, the Tordenskjold class carried guns in a wide range of calibers:

• Two 21 cm/45 (8.2 inch) guns in turrets fore and aft as the main armament.
• Six 12 cm/45 (4.7 inch), mounted three on each side in a central battery, as the secondary armament.
• Six 7.6 cm/40 (3 inch) guns, also mounted in the central battery, as the tertiary armament.
• Six 1-pdr Quick Fire guns. These were meant to be used against torpedo boats.

The Tordenskjold class was armoured to withstand battle with ships of a similar class, but her protection system could not withstand attacks from heavier ships nor underwater attacks very well:

• 7 inch (17.78 cm) Harvey armour in the belt
• 8 inch (20.32 cm) of the same armour on the turrets

Fate

Both ships were phased out from active duty in the mid-1930s, and were used as training vessels. After the German invasion of Norway in 1940, they were taken by the Germans and turned into floating Flak batteries. After the war they were returned to the Royal Norwegian Navy and served as barracks for a short time before they were sold for scrapping.

Ships

Source

	Laid Down	Launched	Commissioned
Harald Harrfagre	18 March 1896	4 January 1897	10 June 1897
Tordenskjold	18 March 1896	10 Mar 1897	2 April 1898

Gallery

• Tordenskjold class plan.gif

  Plan view of Tordenskjold class coastal battleship. Note heavy guns in turrets on either end, secondary armament in central battery.

• 

  Side view of Tordenskjold class. Note heavy guns in turrets on either end, secondary armament in central battery, of particular interest is the light QF guns mounted on top of the turrets.

• Tordenskjold.jpg

  Photograph of
  P/S Tordenskjold from 1900.

• HNoMS Eidsvold and HNoMS Tordenskiold (models).png

  Models of the coastal defence cruisers Tordenskiold and Eidsvold. Eidvold in the rear.

References

• Brook, Peter. Warships for Export: Armstrong Warships 1867–1927. Gravesend, UK: World Ship Society, 1999. ISBN 0-905617-89-4.
• Chesneau, Roger and Eugene M. Kolesnik. Conway's All The World's Fighting Ships 1860–1905. London: Conway's Maritime Press, 1979. ISBN 0-85177-133-5.
• Naval History via Flix: KNM Harald Haarfagre, retrieved 12 December 2005