The Admiral Pereira da Silva class of frigates, also known as Admiral-class frigates, were in the service of the Portuguese Navy between 1966 and 1985. The class was based on the Dealey-classdestroyer escort of the United States Navy. The three ships of the class were built in Portugal, at the Lisnave shipyards and the shipyards of Viana do Castelo. The construction of the ships was part of the effort of Portugal to expand its fleet in the face of unrest in the empire and was financed by the United States via the Mutual Defense Assistance Program. Financial problems prevented them from ever being modernised and they were deleted in 1989.
By the 1960s, Portugal retained an extensive empire and the vast majority of the Portuguese Navy's warships were dedicated to patrolling its waters. However, in that decade the empire saw unrest and invasion and the navy was expanded to meet those threats. Three ships were ordered from Portuguese shipyards to a modified design of the American Dealey-classdestroyer escorts.[1] They were funded in the United States as hulls DE-1039, DE-1042 and DE-1046 under the Mutual Defense Assistance Program.[2][3] The vessels were modified for service in tropical climates for service within the empire.[2] Rated as frigates by the Portuguese Navy, they measured 95.9 metres (314 ft 8 in) long overall with a beam of 11.18 m (36 ft 8 in) and a standard draught of 4.3 m (14 ft 1 in) and a maximum draught of 5.33 m (17 ft 6 in). The frigates had a standard displacement of 1,450 tonnes (1,430 long tons) and 1,914 t (1,884 long tons) at full load.[4] They had a complement of 166 including 12 officers.[2][4]
The Admiral Pereira da Silva-class ships were propelled by a propeller on a single shaft turned by a De Lavalgeared turbine creating 15,000 kilowatts (20,000 shp). It was powered by steam from two Foster-Wheeler boilers creating 2,100 kilopascals (300 psi) of pressure at 454 °C (850 °F). This gave the frigates a maximum speed of 27 knots (50 km/h; 31 mph). They carried 400 t (390 long tons; 440 short tons) of fuel oil giving them a range of 3,220 nautical miles (5,960 km; 3,710 mi) at 15 knots (28 km/h; 17 mph).[2]
Admiral Pereira da Silva-class frigates were equipped with Mark 63fire-control systems. They were also fitted with MLA-1B search, Type 978 tactical and SPG-34 fire control radars. Th three ships of the class were equipped with different sonar to reduce frequency interference. Admiral Pereira da Silva was given SQS-30, Admiral Gago Coutinho was given SQS-31 and Admiral Magalhães Correia was given SQS-31. All three vessels mounted SQA-10A variable depth sonar and DUBA-38 sonar.[2][3]
Shipsedit
Admiral Pereira da Silva class construction data[2]
Pennant number
Ship name
Builder
Laid down
Launched
Commissioned
Fate
F 472
Admiral Pereira da Silva
Lisnave
14 June 1962
2 December 1963
20 December 1966
Deleted 1989
F 473
Admiral Gago Coutinho
2 December 1963
13 August 1965
29 November 1967
F 474
Admiral Magalhães Correia
Viana do Castelo
30 August 1963
26 April 1965
4 November 1968
Construction and careeredit
All three ships were constructed in Portugal.[2] After they entered service, the Portuguese Empire was disassembled beginning in the 1970s and the Portuguese economy suffered as a result. This prevented the ships from ever receiving their planned refits and saw maintenance issues increase over their careers.[1][7] They were intended to be replaced by Dutch Kortenaer-class frigates but Portugal acquired the Vasco da Gama-class frigates instead.[8][9]
^In United States Navy gun nomenclature, the "/50 caliber" denotes the length of the gun. In this case, the /50 gun is 50 caliber, meaning that the gun barrel is 50 times as long as it is in diameter.
Blackman, Raymond V. B., ed. (1972). Jane's Fighting Ships 1972–73. London: Sampson Low, Marston & Company. OCLC 28197951.
Couhat, Jean Labayle, ed. (1976). Combat Fleets of the World 1976/77: Their Ships, Aircraft, and Armament. Annapolis, Maryland: Naval Institute Press. ISBN0-87021-183-8.
Couhat, Jean Labayle, ed. (1986). Combat Fleets of the World 1986/87. Annapolis, Maryland: Naval Institute Press. ISBN0-85368-860-5.
Friedman, Norman (1995). "United States of America". In Chumbley, Stephen (ed.). Conway's All the World's Fighting Ships 1947–1995. Annapolis, Maryland: Naval Institute Press. pp. 544–633. ISBN1-55750-132-7.
Lyon, Hugh & Chumbley, Stephen (1995). "Portugal". In Chumbley, Stephen (ed.). Conway's All the World's Fighting Ships 1947–1995. Annapolis, Maryland: Naval Institute Press. pp. 317–322. ISBN1-55750-132-7.
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January 01, 1970
admiral, pereira, silva, class, frigate, admiral, pereira, silva, class, frigates, also, known, admiral, class, frigates, were, service, portuguese, navy, between, 1966, 1985, class, based, dealey, class, destroyer, escort, united, states, navy, three, ships, . The Admiral Pereira da Silva class of frigates also known as Admiral class frigates were in the service of the Portuguese Navy between 1966 and 1985 The class was based on the Dealey class destroyer escort of the United States Navy The three ships of the class were built in Portugal at the Lisnave shipyards and the shipyards of Viana do Castelo The construction of the ships was part of the effort of Portugal to expand its fleet in the face of unrest in the empire and was financed by the United States via the Mutual Defense Assistance Program Financial problems prevented them from ever being modernised and they were deleted in 1989 Admiral Magalhaes Correia underwayClass overview NameAdmiral Pereira da Silva class BuildersLisnave Lisbon ENVC Viana do Castelo Operators Portuguese Navy Preceded byPacheco Pereira class Succeeded byJoao Belo class Built1962 1968 In commission1966 1989 Planned3 Completed3 Retired3 General characteristics TypeFrigate Displacement1 914 t 1 884 long tons Length95 9 m 314 ft 8 in Beam11 18 m 36 ft 8 in Draught5 33 m 17 ft 6 in Propulsion2 Foster Wheeler boilers 1 De Laval geared turbine 15 000 kW 20 000 shp 1 shaft Speed27 knots 50 km h 31 mph Range3 220 nmi 5 960 km 3 710 mi at 15 knots 28 km h 17 mph Complement166 Sensors and processing systemsMark 63 fire control system Armament2 76 mm 3 in guns 2 triple 533 mm 21 in torpedo tubes 2 375 mm 14 75 in anti submarine rocket launchers 2 depth charge throwers Contents 1 Design and description 2 Ships 3 Construction and career 4 See also 5 Notes 6 Citations 7 References 8 External linksDesign and description editBy the 1960s Portugal retained an extensive empire and the vast majority of the Portuguese Navy s warships were dedicated to patrolling its waters However in that decade the empire saw unrest and invasion and the navy was expanded to meet those threats Three ships were ordered from Portuguese shipyards to a modified design of the American Dealey class destroyer escorts 1 They were funded in the United States as hulls DE 1039 DE 1042 and DE 1046 under the Mutual Defense Assistance Program 2 3 The vessels were modified for service in tropical climates for service within the empire 2 Rated as frigates by the Portuguese Navy they measured 95 9 metres 314 ft 8 in long overall with a beam of 11 18 m 36 ft 8 in and a standard draught of 4 3 m 14 ft 1 in and a maximum draught of 5 33 m 17 ft 6 in The frigates had a standard displacement of 1 450 tonnes 1 430 long tons and 1 914 t 1 884 long tons at full load 4 They had a complement of 166 including 12 officers 2 4 The Admiral Pereira da Silva class ships were propelled by a propeller on a single shaft turned by a De Laval geared turbine creating 15 000 kilowatts 20 000 shp It was powered by steam from two Foster Wheeler boilers creating 2 100 kilopascals 300 psi of pressure at 454 C 850 F This gave the frigates a maximum speed of 27 knots 50 km h 31 mph They carried 400 t 390 long tons 440 short tons of fuel oil giving them a range of 3 220 nautical miles 5 960 km 3 710 mi at 15 knots 28 km h 17 mph 2 The vessels were primarily designed for anti submarine warfare ASW 5 They were armed with two twin mounted 3 inch 76 mm 50 caliber dual purpose guns with one turret forward and one aft a In the B position forward the frigates mounted two four barrelled Bofors 375 mm 14 75 in anti submarine rocket launchers 2 4 The Admiral Pereira da Silvas also mounted two depth charge throwers and two triple 324 mm 12 75 in Mk 32 ASW torpedo tubes for Mark 44 torpedoes 2 6 Admiral Pereira da Silva class frigates were equipped with Mark 63 fire control systems They were also fitted with MLA 1B search Type 978 tactical and SPG 34 fire control radars Th three ships of the class were equipped with different sonar to reduce frequency interference Admiral Pereira da Silva was given SQS 30 Admiral Gago Coutinho was given SQS 31 and Admiral Magalhaes Correia was given SQS 31 All three vessels mounted SQA 10A variable depth sonar and DUBA 38 sonar 2 3 Ships editAdmiral Pereira da Silva class construction data 2 Pennant number Ship name Builder Laid down Launched Commissioned Fate F 472 Admiral Pereira da Silva Lisnave 14 June 1962 2 December 1963 20 December 1966 Deleted 1989 F 473 Admiral Gago Coutinho 2 December 1963 13 August 1965 29 November 1967 F 474 Admiral Magalhaes Correia Viana do Castelo 30 August 1963 26 April 1965 4 November 1968Construction and career editAll three ships were constructed in Portugal 2 After they entered service the Portuguese Empire was disassembled beginning in the 1970s and the Portuguese economy suffered as a result This prevented the ships from ever receiving their planned refits and saw maintenance issues increase over their careers 1 7 They were intended to be replaced by Dutch Kortenaer class frigates but Portugal acquired the Vasco da Gama class frigates instead 8 9 See also editOslo class frigate Norwegian ship class based on US Dealey classNotes edit In United States Navy gun nomenclature the 50 caliber denotes the length of the gun In this case the 50 gun is 50 caliber meaning that the gun barrel is 50 times as long as it is in diameter Citations edit a b Lyon amp Chumbley 1995 pp 317 318 a b c d e f g h i Lyon amp Chumbley 1995 p 318 a b Couhat 1986 p 395 a b c Blackman 1972 p 270 Friedman 1995 p 595 Couhat 1976 p 314 Moore 1982 p 371 Lyon amp Chumbley 1995 p 320 Moore 1982 p 370 References editBlackman Raymond V B ed 1972 Jane s Fighting Ships 1972 73 London Sampson Low Marston amp Company OCLC 28197951 Couhat Jean Labayle ed 1976 Combat Fleets of the World 1976 77 Their Ships Aircraft and Armament Annapolis Maryland Naval Institute Press ISBN 0 87021 183 8 Couhat Jean Labayle ed 1986 Combat Fleets of the World 1986 87 Annapolis Maryland Naval Institute Press ISBN 0 85368 860 5 Friedman Norman 1995 United States of America In Chumbley Stephen ed Conway s All the World s Fighting Ships 1947 1995 Annapolis Maryland Naval Institute Press pp 544 633 ISBN 1 55750 132 7 Lyon Hugh amp Chumbley Stephen 1995 Portugal In Chumbley Stephen ed Conway s All the World s Fighting Ships 1947 1995 Annapolis Maryland Naval Institute Press pp 317 322 ISBN 1 55750 132 7 Moore John ed 1982 Jane s Fighting Ships 1981 82 85th ed London Jane s Publishing Incorporated ISBN 0 86720 617 9 External links edit nbsp Wikimedia Commons has media related to Almirante Pereira da Silva class frigates Dealey class ocean escorts at Destroyer History Foundation Retrieved from https en wikipedia org w index php title Admiral Pereira da Silva class frigate amp oldid 1122441785, wikipedia, wiki, book, books, library,
