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The Impetuoso class were the first post-World War II destroyers built for the Italian Navy. The two ships were ordered in February 1950, entered service in 1958 and were retired in the early 1980s.[1]

Impetuoso alongside USS Kalamazoo in the Mediterranean Sea in June 1977
Class overview
NameImpetuoso class
Builders
  • Cantiere navale di Riva Trigoso
  • Cantiere navale fratelli Orlando
Operators Italian Navy
Preceded by San Giorgio class
Succeeded by Impavido class
Built1952–1958
In commission1958–1983
Completed2
Retired2
General characteristics
TypeDestroyer
Displacement
  • 2,775 tons standard
  • 3,810 tons full load
Length127.6 m (418 ft 8 in)
Beam13.2 m (43 ft 4 in)
Draught4.5 m (14 ft 9 in)
Propulsion
  • 2 shaft geared turbines
  • 4 × Foster Wheeler boilers providing 65,000 hp (48,000 kW)
Speed34 knots (63 km/h; 39 mph)
Range3,000 nmi (5,600 km; 3,500 mi) at 16 kn (30 km/h; 18 mph)
Complement315
Sensors and
processing systems
  • SPS-6 air-search radar
  • SG-6B surface-search radar
  • SPG-25 and SPG-34 fire control radar
  • SQS-4 search sonar
Electronic warfare
& decoys
WLR-1 ESM (only Impetuoso by 1980)
Armament
  • 2 × twin 127 mm/38 caliber gun
  • 2 × quad Bofors 40 mm/60 guns
  • 4 × twin Bofors 40 mm/60 guns
  • 1 × 305 mm Menon ASW mortar
  • 2 × triple 12.75-inch (324 mm) torpedo launchers with Mark 44 torpedoes

Design


The Impetuoso class hull design was based on the uncompleted World War II Comandanti Medaglie d'Oro-class destroyer.[1] The class has a length of 127.6 m (419 ft) with length between perpendiculars of 123.4 m (405 ft), a beam of 13.2 m (43 ft), with a draught of 4.5 m (15 ft), and their displacement were 2,775 long tons (2,820 t) standard and 3,810 long tons (3,870 t) at full load. The ships was powered by two-shaft geared steam turbines with four Foster Wheeler boilers, with total power output of 65,000 shaft horsepower (48 MW). Impetuoso class has a maximum speed of 34 knots (63 km/h), with range of 3,000 nautical miles (5,600 km) while cruising at 16 knots (30 km/h).[1] The ships has a complement of 315 personnel.

The class were armed with four 5-inch (127 mm)/38 caliber guns in two twin-gun turrets, 16 Bofors 40 mm/60 guns consisted of two quad-mounts and four twin-mounts, and one 305 mm Menon anti-submarine mortar. They were also armed with two fixed 533-millimetre (21 in) torpedo tubes, which was later replaced by two 12.75-inch (324 mm) triple-tubes with Mark 44 torpedoes.[1] There was a proposed modernization program in the late 1960s for the ships to be rearmed with a single lightweight 5"/54 caliber Mark 45 gun forward and RIM-24 Tartar surface-to-air missile launcher in the aft.[1]

The ships electronics and sensors consisted of SPS-6 air-search radar, SG-6B surface-search radar, SPG-25 and SPG-34 fire control radar, and SQS-11 search sonar, which was later replaced with SQS-4 sonar.[1] As of 1980, Impetuoso was equipped with WLR-1 electronic support measure system with noise jammer, while Indomito appears to be not equipped with any electronic warfare system.[1]


Ships


Name Pennant
number
Builder Laid down[1] Launched[1] Commissioned[1] Fate[1]
Impetuoso D 558 CNR, Riva Trigoso 7 May 1952 16 September 1956 25 January 1958 Stricken 1983
Indomito D 559 Ansaldo, Livorno 24 April 1952 9 August 1955 23 February 1958 Stricken 3 November 1980

References



Bibliography







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