Mjölner was based on the design the Spica class designed in Italy.[1] Small and designed for coastal operation, the vessel was named after Thor's hammer, Mjölner.[2]
Machinery consisted of two Penhoët A oil-fired boilers, which supplied steam to two de Laval geared steam turbines, each driving its own propeller. The turbines were rated at 16,000 shp (12,000 kW) to give a design speed of 30 knots (56 km/h; 35 mph). 190 tonnes (190 long tons) of fuel was carried to give a range of 1,260 nautical miles (2,330 km; 1,450 mi) at 20 knots (37 km/h; 23 mph).[5]
The main armament consisted of three 10.5 cm (4 in) K/50 M42 guns produced by Bofors.[6] These were placed in separate mounts, one on the fore deck, one on the aft deck and one on the aft superstructure.[4]Air defence consisted two 40 mm (1.57 in) K/60 M36 and two 20 mm (0.79 in) K/66 M40 individually mounted anti-aircraft autocannons, also provided by Bofors.[7] Three torpedo tubes for 53 cm (21 in) torpedoes were triple mounted aft of the superstructure and two depth charge throwers were mounted further towards the stern. 42 mines could also be carried for minelaying.[7]
Mjölner was modernised in 1953 and re-rated as a frigate. One of the 105 mm (4.1 in) main guns was removed, along with the triple 533 mm (21 in) torpedo tubes. A single Squid depth charge launcher was fitted to improve anti-submarine capabilities and the 40 mm (1.6 in) guns were upgraded.[6]
After the conversion, Mode retained minelaying capability.[5] The upgraded ship was allocated the pennant number 73.
Disposal
Mjölner was decommissioned on 1 April 1966 and sold for scrap on 3 November 1969.[3]
Arbeitskreis für Wehrforschung, ed. (1977). "Marine-rundschau: Zeitschrift für Seewesen" (in German). 74. {{cite journal}}: Cite journal requires |journal= (help)
Borgenstam, Curt; Insulander, Per; Kaudern, Gösta (1989). Jagare: med Svenska flottans jagare under 80 år (in Swedish). Västra Frölunda: Marinlitteratur. ISBN91-970700-4-1. SELIBR7792227.
Gardiner, Robert & Chesneau, Roger, eds. (1980). Conway's All The World's Fighting Ships 1922–1946. Conway Maritime Press. ISBN0-85177-146-7.