Slightly faster and larger than the escort destroyers they succeeded, the Dealey class were fitted with twin-mounted 3-inch (76 mm) guns, anti-submarine (ASW) rockets, a depth charge rack and six depth charge launchers. There were later modernizations that removed the ASW rockets and the depth charges in favor of nuclear-capable anti-submarine rocket launchers and torpedo mounts which fired lighter homing torpedoes. A large SQS 23 sonar was refitted in a bow sonar dome and most of the class were also fitted with a hangar and landing pad for DASH drone helicopters to deliver MK 44 and Mk 46 torpedoes. The drone helicopters proved very unreliable and their failure contributed to the relatively short life of the class.
They were decommissioned in 1972 and 1973 in favor of the Knox-classfrigate. Dealey and Hartley were sold at surplus to other countries in 1972, with the remainder of the class being sold for scrap.
In the late 1940s, the US Navy developed a requirement for a replacement for the PC-461-classsubmarine chaser in the coastal convoy escort and patrol roles. The existing submarine chasers were considered too small to carry the required anti-submarine weapons and sensors, and too slow to catch modern submarines, with a ship the size of existing destroyer escorts required. The ships would need to be cheap and quick to build, as large numbers would be required in the event of a war.[1] By 1950, the requirement had changed to an "Ocean Escort" with a speed of at least 25 knots (46 km/h; 29 mph) at full load and an endurance of 6,000 nautical miles (11,000 km; 6,900 mi) at 12 knots (22 km/h; 14 mph). An ahead-throwing anti-submarine weapon, at first planned to be the Mark 17, a large, trainable Hedgehog anti-submarine spigot mortar, would be fitted.[2]
The final design, SCB 72, or the Dealey or DE-1006 class,[3] was 315 feet (96.0 m) long overall and 308 feet (93.9 m) at the waterline, with a beam of 36 feet 8 inches (11.18 m) and a draft of 11 feet 10 inches (3.61 m). Displacement was 1,314 long tons (1,335 t) light and 1,877 long tons (1,907 t) full load.[4] 2 Foster-Wheeler boilers fed steam to a geared steam turbine, which drove a single propeller shaft. The machinery was rated at 20,000 shaft horsepower (15,000 kW) which gave a design speed of 27 knots (50 km/h; 31 mph).[4][a] A single-shaft machinery layout was chosen to ease mass production, avoiding potential bottlenecks in gear-cutting which had delayed production of wartime destroyer escorts.[3][4]
As built, the ships had a gun armament of two twin 3-inch (76 mm)/50 calibre guns, mounted fore and aft. These were open, manually trained dual-purpose mounts which could be used against both surface and anti-aircraft targets. The Mark 17 Hedgehog was cancelled before the ships were built, so in its place two British Squid anti-submarine mortars were fitted ahead of the ship's bridge in Dealey, with a RUR-4 Weapon Alpha anti-submarine rocket launcher fitted in the remaining ships of the class. Launchers for anti-submarine torpedoes were fitted, and depth charge throwers were fitted on the ships' fantail.[3][4] Sensors included the SPS-6 air-search radar and the SQS-4 low-frequency sonar.[5]
The prototype ship, Dealey, was built under the Fiscal year (FY) 1952 shipbuilding program, with two ordered in both the FY 1953 and 1954 programs and eight in the 1955 program. Production was stopped at 13 because the Dealey class was considered too expensive at $12 million for mass production. This resulted in the smaller, diesel-powered Claud Jones class being built. The Dealey design formed the basis for the Norwegian Oslo-class and Portuguese Admiral Pereira da Silva-classfrigates.[6][7]
Modificationsedit
All of the class except Dealey, Cromwell and Courtney were upgraded in the 1960s by adding facilities for the DASH drone helicopter, with a hangar and helicopter deck replacing the aft 3-inch gun mount and the longer-ranged SQS-23 sonar replaced the SQS-4. The three unmodified ships were fitted with a Variable Depth Sonar (VDS). All ships had their Squid or Weapon Alpha launchers removed late in their US Navy career, while Mark 32 torpedo tubes for Mark 44 or Mark 46 anti-submarine torpedoes were fitted.[4][8]
Blackman, Raymond V. B. (1971). Jane's Fighting Ships 1971–72. London: Sampson Low Marston & Co. Ltd.
Friedman, Norman (1982). U.S. Destroyers: An Illustrated Design History. Annapolis, Maryland, USA: Naval Institute Press. ISBN0-87021-733-X.
Gardiner, Robert; Chumbley, Stephen, eds. (1995). Conway's All The World's Fighting Ships 1947–1995. Annapolis, Maryland, USA: Naval Institute Press. ISBN1-55750-132-7.
External linksedit
Wikimedia Commons has media related to Dealey class destroyer escorts.
Dealey-class ocean escorts at
April 12, 2024
dealey, class, destroyer, escort, were, first, post, world, escort, ships, built, united, states, navy, dealey, 1006, class, overviewoperators, united, states, navy, national, navy, uruguay, colombian, national, navypreceded, byjohn, butler, classsucceeded, by. The Dealey class destroyer escorts were the first post World War II escort ships built for the United States Navy USS Dealey DE 1006 Class overviewOperators United States Navy National Navy of Uruguay Colombian National NavyPreceded byJohn C Butler classSucceeded byClaud Jones classSubclassesOslo class Admiral Pereira da Silva classBuilt1952 1957In commission1954 1994Completed13Preserved1General characteristicsTypeDestroyer escortDisplacement1 314 long tons 1 335 t light 1 877 long tons 1 907 t full loadLength314 ft 6 in 95 86 m Beam36 ft 9 in 11 20 m Draft18 ft 5 5 m Propulsion2 Foster Wheeler boilers 1 De Laval geared turbine 20 000 shp 15 MW 1 shaftSpeed25 knots 29 mph 46 km h Complement170Sensors and processing systemsMark 63 fire control systemArmament4 3 inch 50 caliber guns 4 21 inch 533 mm torpedo tubes 2 ASW torpedo racks 2 Hedgehog anti submarine mortar 2 DCT K guns Slightly faster and larger than the escort destroyers they succeeded the Dealey class were fitted with twin mounted 3 inch 76 mm guns anti submarine ASW rockets a depth charge rack and six depth charge launchers There were later modernizations that removed the ASW rockets and the depth charges in favor of nuclear capable anti submarine rocket launchers and torpedo mounts which fired lighter homing torpedoes A large SQS 23 sonar was refitted in a bow sonar dome and most of the class were also fitted with a hangar and landing pad for DASH drone helicopters to deliver MK 44 and Mk 46 torpedoes The drone helicopters proved very unreliable and their failure contributed to the relatively short life of the class They were decommissioned in 1972 and 1973 in favor of the Knox class frigate Dealey and Hartley were sold at surplus to other countries in 1972 with the remainder of the class being sold for scrap Contents 1 Development and design 1 1 Modifications 2 Ships 3 Notes 4 Citations 5 References 6 External linksDevelopment and design editIn the late 1940s the US Navy developed a requirement for a replacement for the PC 461 class submarine chaser in the coastal convoy escort and patrol roles The existing submarine chasers were considered too small to carry the required anti submarine weapons and sensors and too slow to catch modern submarines with a ship the size of existing destroyer escorts required The ships would need to be cheap and quick to build as large numbers would be required in the event of a war 1 By 1950 the requirement had changed to an Ocean Escort with a speed of at least 25 knots 46 km h 29 mph at full load and an endurance of 6 000 nautical miles 11 000 km 6 900 mi at 12 knots 22 km h 14 mph An ahead throwing anti submarine weapon at first planned to be the Mark 17 a large trainable Hedgehog anti submarine spigot mortar would be fitted 2 The final design SCB 72 or the Dealey or DE 1006 class 3 was 315 feet 96 0 m long overall and 308 feet 93 9 m at the waterline with a beam of 36 feet 8 inches 11 18 m and a draft of 11 feet 10 inches 3 61 m Displacement was 1 314 long tons 1 335 t light and 1 877 long tons 1 907 t full load 4 2 Foster Wheeler boilers fed steam to a geared steam turbine which drove a single propeller shaft The machinery was rated at 20 000 shaft horsepower 15 000 kW which gave a design speed of 27 knots 50 km h 31 mph 4 a A single shaft machinery layout was chosen to ease mass production avoiding potential bottlenecks in gear cutting which had delayed production of wartime destroyer escorts 3 4 As built the ships had a gun armament of two twin 3 inch 76 mm 50 calibre guns mounted fore and aft These were open manually trained dual purpose mounts which could be used against both surface and anti aircraft targets The Mark 17 Hedgehog was cancelled before the ships were built so in its place two British Squid anti submarine mortars were fitted ahead of the ship s bridge in Dealey with a RUR 4 Weapon Alpha anti submarine rocket launcher fitted in the remaining ships of the class Launchers for anti submarine torpedoes were fitted and depth charge throwers were fitted on the ships fantail 3 4 Sensors included the SPS 6 air search radar and the SQS 4 low frequency sonar 5 The prototype ship Dealey was built under the Fiscal year FY 1952 shipbuilding program with two ordered in both the FY 1953 and 1954 programs and eight in the 1955 program Production was stopped at 13 because the Dealey class was considered too expensive at 12 million for mass production This resulted in the smaller diesel powered Claud Jones class being built The Dealey design formed the basis for the Norwegian Oslo class and Portuguese Admiral Pereira da Silva class frigates 6 7 Modifications edit All of the class except Dealey Cromwell and Courtney were upgraded in the 1960s by adding facilities for the DASH drone helicopter with a hangar and helicopter deck replacing the aft 3 inch gun mount and the longer ranged SQS 23 sonar replaced the SQS 4 The three unmodified ships were fitted with a Variable Depth Sonar VDS All ships had their Squid or Weapon Alpha launchers removed late in their US Navy career while Mark 32 torpedo tubes for Mark 44 or Mark 46 anti submarine torpedoes were fitted 4 8 Ships editName Number Builder Laid down 9 Launched 9 Commissioned 9 FateDealey DE 1006 Bath Iron Works 15 December 1952 8 November 1953 3 June 1954 Transferred to Uruguay as ROU 18 De Julio DE 3 Cromwell DE 1014 Bath Iron Works 3 August 1953 4 June 1954 24 November 1954 Stricken 5 July 1972Hammerberg DE 1015 Bath Iron Works 12 November 1953 20 August 1954 2 March 1955 Stricken 14 December 1973Courtney DE 1021 Defoe Shipbuilding 2 September 1954 2 November 1955 24 September 1956 Stricken 1973Lester DE 1022 Defoe Shipbuilding 2 September 1954 5 January 1956 14 June 1957 Stricken 1973Evans DE 1023 Puget Sound Bridge and Dredging 8 April 1955 14 September 1955 14 June 1957 Stricken 1973Bridget DE 1024 Puget Sound Bridge and Dredging 19 September 1955 25 April 1956 24 October 1957 Stricken 1973Bauer DE 1025 Bethlehem Steel Alameda Shipyard 1 December 1955 4 June 1957 21 November 1957 Stricken 1973Hooper DE 1026 Bethlehem Steel Alameda Shipyard 4 January 1956 1 August 1957 18 March 1958 Stricken 1973John Willis DE 1027 New York Shipbuilding 5 July 1955 4 February 1956 21 February 1957 Stricken 1972Van Voorhis DE 1028 New York Shipbuilding 29 August 1955 28 July 1956 22 April 1957 Stricken 1972Hartley DE 1029 New York Shipbuilding 31 October 1955 24 November 1956 26 June 1957 Sold to Colombia as ARC Boyaca DE 16 1972 Preserved in ColombiaJoseph K Taussig DE 1030 New York Shipbuilding 3 January 1956 3 January 1957 10 September 1957 Stricken 1972Notes edit Dealey reached a speed of 27 58 knots 51 08 km h 31 74 mph during sea trials 3 Citations edit Friedman 1982 pp 270 272 273 Friedman 1982 pp 273 274 a b c d Friedman 1982 p 274 a b c d e Gardiner amp Chumbley 1995 p 595 Gardiner amp Chumbley 1995 pp 558 559 595 Friedman 1982 p 275 Gardiner amp Chumbley 1995 pp 318 595 596 Friedman 1982 p 290 a b c Blackman 1971 p 486References editBlackman Raymond V B 1971 Jane s Fighting Ships 1971 72 London Sampson Low Marston amp Co Ltd Friedman Norman 1982 U S Destroyers An Illustrated Design History Annapolis Maryland USA Naval Institute Press ISBN 0 87021 733 X Gardiner Robert Chumbley Stephen eds 1995 Conway s All The World s Fighting Ships 1947 1995 Annapolis Maryland USA Naval Institute Press ISBN 1 55750 132 7 External links edit nbsp Wikimedia Commons has media related to Dealey class destroyer escorts Dealey class ocean escorts at Destroyer History Foundation Retrieved from https en wikipedia org w index php title Dealey class destroyer escort amp oldid 1183714419, wikipedia, wiki, book, books, library,
