Kentucky under construction; the round barbettes which would have held her 16-inch (406 mm) main battery are prominent | |
History | |
---|---|
United States | |
Namesake | State of Kentucky |
Ordered | 9 September 1940 |
Builder | Norfolk Naval Shipyard |
Laid down | 7 March 1942 |
Launched | 20 January 1950 |
Completed | Not completed |
Reclassified | BBG-1 from BB-66 |
Stricken | 9 June 1958 |
Fate | Sold for scrapping 31 October 1958 |
General characteristics (as planned) | |
Class and type | Iowa-class battleship |
Displacement |
|
Length | 887 ft 3 in (270.43 m) |
Beam | 108 ft 2 in (32.97 m) |
Draft | 35 ft 10 in (10.92 m) (full load) |
Installed power | 212,000 shp (158,000 kW) |
Speed | 33 kn (38 mph; 61 km/h) |
Complement | 151 officers, 2,637 enlisted |
Armament | |
Armor | |
Aircraft carried | 3 × Vought OS2U Kingfisher/Curtiss SC Seahawk floatplanes |
USS [lower-alpha 1] Kentucky (BB-66) was an uncompleted battleship intended to be the last ship of the Iowa class. Hull BB-66 was originally to be the second ship of the Montana-class battleships. However, the urgent need for more warships at the outbreak of World War II and the U.S. Navy's experiences in the Pacific theater led it to conclude that rather than battleships larger and more heavily armed than the Iowa class, it quickly needed more fast battleships of that class to escort the new Essex-class aircraft carriers being built. As a result, hulls BB-65 and BB-66 were reordered and laid down as Iowa-class battleships in 1942.
As such, she was intended to be the sixth and final member of the Iowa-class constructed. At the time of her construction she was the second ship of the United States Navy to be named in honor of the U.S. state of Kentucky. Like her sister ship Illinois, laid down as one of the last pair of Iowa-class ahead of her, Kentucky was still under construction at the end of hostilities and became caught up in the post-war draw-down of the armed services. Her construction was suspended twice, during which times she served as a parts hulk. In the 1950s, several proposals were made to complete the ship as a guided missile battleship, abandoned primarily due to cost concerns and the rapid pace of evolving missile technology. Kentucky ultimately was sold for scrap in 1958.
Kentucky was conceived in 1935, when the United States Navy initiated design studies for the creation of an extended South Dakota class that was not restricted by the Second London Naval Treaty. This resulted in one of the "fast battleship" designs planned in 1938 by the Preliminary Design Branch at the Bureau of Construction and Repair.
The passage of the Second Vinson Act in 1938 had cleared the way for construction of the four South Dakota-class battleships and the first two Iowa-class fast battleships (those with the hull numbers BB-61 and BB-62). [1] The latter four battleships of the class, those designated with the hull numbers BB-63, BB-64, BB-65, and BB-66 (Missouri, Wisconsin, Illinois, and Kentucky, respectively) were not cleared for construction until 12 July 1940. [2] While BB-63 and BB-64 were originally planned as the final ships in the Iowa-class, BB-65 and BB-66 were intended to be the first ships of the Montana class which was larger and slower while mounting twelve 16 in (406 mm) Mark 7 guns. [3] [4] However, the passage of an emergency war building program on 19 July 1940 resulting in Illinois and Kentucky being re-ordered as the fifth and sixth ships, respectively, of the Iowa class in order to save time on construction, so the first ship of the Montana-class would be reassigned as BB-67. [5] [6] [7] The orders for BB-65 and BB-66 were placed on 9 September 1940, and the ships were laid down on 6 December 1942, and 7 March 1942, respectively.
By 1942 the United States Navy shifted its building focus from battleships to aircraft carriers after the successes of carrier combat in both the Battle of the Coral Sea, and to a greater extent, the Battle of Midway. [8] As a result, the construction of the US fleet of Essex-class aircraft carriers had been given the highest priority for completion in the US shipyards by the US Navy. [9] The Essex-class carriers were proving vital to the war effort by enabling the Allies to gain and maintain air supremacy in the Pacific War, and were rapidly becoming the principal striking arm of the United States Navy in the ongoing effort to defeat the Empire of Japan. [10] Accordingly, the United States accepted shortcomings in the armor of their Iowa-class battleships in favor of additional speed, which could steam at a comparable speed with the Essex-class and provide the carriers with the maximum amount of anti-aircraft protection. [10] As a result, construction of the Montana-class was canceled before their keels could be laid.
Kentucky's main battery would have consisted of nine 16 in (406 mm)/50 cal Mark 7 guns, which could hurl 2,700 lb (1,225 kg) armor-piercing shells some 20 mi (32 km). Her secondary battery would have consisted of 20 5 in (127 mm)/38 cal guns arranged in 10 turrets, which could fire at targets up to 10 mi (16 km) away. With the advent of air power and the mandate to gain and maintain air superiority came a need to protect the growing fleet of Allied aircraft carriers. To this end, Kentucky was to be fitted with an array of Oerlikon 20 mm and Bofors 40 mm anti-aircraft guns to defend allied carriers from enemy airstrikes. [11]
Like Iowa-class ships from Missouri (hull number BB-63) onwards, the frontal bulkhead armor was increased from the original 11.3 in (287 mm) to 14.5 in (368 mm) in order to better protect against fire from frontal sectors. [12] [13] Because the Iowa-class torpedo defense was virtually the same as the preceding South Dakota-class battleships it was proposed that Illinois's and Kentucky's hull be redesigned to provide a greater degree of torpedo protection for the battleship. Under the original construction schematics for the class each side of the ship was protected below the waterline by two tanks mounted outside the belt armor, and separated by a bulkhead. These tanks were initially planned to be empty, but in practice were filled with water or fuel oil. The armored belt tapered to a thickness of 4 inches (100 mm) below the waterline. Behind the armored belt there was a void, and then another bulkhead. The outer hull was intended to detonate a torpedo, with the outer two compartments absorbing the shock and with any splinters or debris being stopped by the armored belt and the empty compartment behind it. In 1939 the Navy discovered that this system was less effective than the earlier torpedo defense system of the North Carolina-class due to the excessive rigidity of the lower belt armor causing leakage into adjacent compartments. [14] [15] Subsequently, the design of the torpedo defense system was modified for Illinois and Kentucky, such as eliminating knuckles along certain holding bulkheads; the intended construction format was estimated to provide up to 20% improvement to the torpedo defense of the battleship while simultaneously reducing flooding in the event of a torpedo strike. [16]
Kentucky's construction was plagued by suspensions. Her keel was laid down at the Norfolk Navy Yard, Portsmouth, Virginia, on 7 March 1942. [5] However, work on the ship was suspended in June that year, and Kentucky's bottom structure was launched to make room for LST construction on 10 June. [5] [17] [18] Work on the ship resumed on 6 December 1944, when the keel structure was moved to Dry Dock 8. Work on the battleship proceeded at a slow pace, and her completion was projected for the third quarter of 1946. In December 1945 it was recommended that Kentucky be completed as an anti-aircraft battleship, and work on the ship was suspended in August 1946 while this was considered. Construction resumed again on 17 August 1948 without any decision having been made on her final design. [5] Work on Kentucky continued until 20 January 1950, when it was decided to halt work on the ship. [19] Following this, she was floated out of her drydock to clear a space for repairs to sister ship Missouri, which had run aground en route from Hampton Roads. [20] [21]
While her construction was suspended, the Bureau of Ships considered an aircraft carrier conversion proposal for Kentucky and Illinois in the aftermath of the Battles of Coral Sea and Midway. As proposed, the converted Kentucky would have had an 864-foot (263 m) long by 108-foot (33 m) wide flight deck, with armament identical to the carriers of the Essex class: four twin 5-inch gun mounts and four more 5-inch guns in single mounts, along with six 40 mm quadruple mounts. The idea was abandoned after the Bureau of Ships decided that the converted ships would carry fewer aircraft than the Essex class, that more Essex-class carriers could be built in the same amount of time, and that the conversion project would be significantly more expensive than new Essexes. Instead, Kentucky and Illinois were to be completed as battleships, but their construction was given very low priority. [22]
As early as 1946, missile conversion projects for Kentucky (project SCB 19) and the incomplete large cruiser USS Hawaii were discussed. [23] In the early 1950s, the advances in guided missile technology led to a proposal to create a large warship armed with both guns and missiles. To this end, the incomplete Kentucky was chosen for conversion from an all gun ship into a "guided missile battleship". [24] This proposal would have been relatively conservative, and would have involved the installation of a pair of twin arm launchers for the RIM-2 Terrier surface-to-air missile (SAM) on the aft deckhouse, with a pair of antennas for the associated AN/APG-55 pulse doppler interception radar installed forward of these, and the AN/SPS-2B air search radar on a short mast. [25] Since the battleship was already approximately 73% complete (construction had been halted at the second deck), [19] installation of the missile system and associated electronics would have involved only adding the necessary equipment without any need to rebuild the ship to accommodate the system. [lower-alpha 2] Some guided missile concepts included one or two launchers for eight SSM-N-9 Regulus II or SSM-N-2 Triton nuclear cruise missiles. [26] The guided missile battleship project was authorized in 1954, and Kentucky was renumbered from BB-66 to BBG-1, with the conversion due to be complete in 1956. However, the project was soon cancelled, with the conversion ideas transferred to a smaller platform that led to the Boston-class guided missile cruiser. [25] These partial conversions of two Baltimore-class heavy cruisers proved only partially successful in their new role, as the pace of change in cruise missile technology rendered their new weapons systems obsolete, while their remaining heavy guns proved in demand.
Another conversion project in early 1956 called for the installation of two Polaris nuclear ballistic missile launchers with a capacity for sixteen weapons. [5] Also proposed were four RIM-8 Talos SAM launchers with eighty missiles per launcher and twelve RIM-24 Tartar SAM launchers with 504 missiles. A July 1956 estimate projected completing the ship by July 1961, but the cost of the conversion ultimately forced the Navy to abandon the project. [27]
Kentucky was never completed, instead serving as a parts hulk while in the mothball fleet at the Philadelphia Naval Shipyard from about 1950 to 1958. [24] Hurricane Hazel hit the area on 15 October 1954, causing Kentucky to break free from her moorings and run aground in the Delaware River. [28] In 1956, Kentucky's bow was removed and used in the repair of Wisconsin, which had been damaged in a collision with the destroyer USS Eaton on 6 May 1956. [24] Congressman William Huston Natcher attempted to block the sale of the ship by objecting to the bill in August 1957. [29] Nevertheless, Kentucky was struck from the Naval Vessel Register on 9 June 1958 and her incomplete hulk was sold for scrapping to Boston Metals Company of Baltimore, Maryland on 31 October for $1,176,666. [19] [30] She was towed to their shipyard in Baltimore in February 1959. [27]
Kentucky's four 600 psi (4.1 MPa) boilers and turbine sets were used to power the first two Sacramento-class fast combat support ships, Sacramento laid down in 1961 and Camden in 1964. When the Navy switched to 1,200 psi (8.3 MPa) boilers, sailors who had served aboard Sacramento and Camden provided the experience to operate the older lower-pressure boilers aboard New Jersey during her combat tour in the Vietnam War and aboard all four of the Iowas when they were recalled and modernized in the 1980s as part of the 600-ship Navy plan. [24] A pair of 150-pound (68 kg) mahogany doors that had been donated by the state of Kentucky while the ship was under construction were removed and used in an officer's club in New York City before eventually being returned to the Kentucky Historical Society in early January 1994. [31] [32]
A cruiser is a type of warship. Modern cruisers are generally the largest ships in a fleet after aircraft carriers and amphibious assault ships, and can usually perform several operational roles from search-and-destroy to ocean escort to sea denial.
The Montana-class battleships were planned as successors of the Iowa class for the United States Navy, to be slower but larger, better armored, and with superior firepower. Five were approved for construction during World War II, but changes in wartime building priorities resulted in their cancellation in favor of continuing production of Essex-class aircraft carriers and Iowa-class battleships before any Montana-class keels were laid.
USS Missouri (BB-63) is an Iowa-class battleship built for the United States Navy (USN) in the 1940s and is a museum ship. Completed in 1944, she is the last battleship commissioned by the United States. The ship was assigned to the Pacific Theater during World War II, where she participated in the Battles of Iwo Jima and Okinawa and shelled the Japanese home islands. Her quarterdeck was the site of the surrender of the Empire of Japan, which ended World War II.
USS New York (BB-34) was a United States Navy battleship, the lead ship of her class. Named for New York State, she was designed as the first ship to carry the 14-inch (356 mm)/45-caliber gun.
USS Illinois (BB-65) was the fifth Iowa-class fast battleship that was laid down for the United States Navy during World War II in the 1940s, although she would not be completed. The Navy had initially planned on building four of the Iowas and then developing a new, more powerful ship for what was to be BB-65. The pressing need for more warships at the outbreak of World War II in Europe led the Navy to conclude that new designs would have to be placed on hold to allow the shipbuilding industry to standardize on a small number of designs. As a result, BB-65 was ordered to the Iowa design in 1940. Illinois was laid down in December 1942, but work was given a low priority, and was still under construction at the end of World War II. She was canceled in August 1945, but her hull remained as a parts hulk until she was broken up in 1958.
USS Mississippi (BB-41/AG-128), the second of three members of the New Mexico class of battleship, was the third ship of the United States Navy named in honor of the 20th state. The ship was built at the Newport News Shipbuilding Company of Newport News, Virginia, from her keel laying in April 1915, her launching in January 1917, and her commissioning in December that year. She was armed with a battery of twelve 14-inch (356 mm) guns in four three-gun turrets, and was protected by heavy armor plate, with her main belt armor being 13.5 inches (343 mm) thick.
USS Wisconsin (BB-64) is an Iowa-class battleship built for the United States Navy (USN) in the 1940s and is currently a museum ship. Completed in 1944, the ship was assigned to the Pacific Theater during World War II, where she participated in the Philippines campaign and the Battles of Iwo Jima and Okinawa. The battleship shelled the Japanese home islands shortly before the end of the war in September 1945. During the Korean War, Wisconsin shelled North Korean targets in support of United Nations and South Korean ground operations, after which she was decommissioned. She was reactivated in 1986; after a modernization program, she participated in Operation Desert Storm in January – February 1991.
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The Iowa class was a class of six fast battleships ordered by the United States Navy in 1939 and 1940. They were initially intended to intercept fast capital ships such as the Japanese Kongō class and serve as the "fast wing" of the U.S. battle line. The Iowa class was designed to meet the Second London Naval Treaty's "escalator clause" limit of 45,000-long-ton (45,700 t) standard displacement. Beginning in August 1942, four vessels, Iowa, New Jersey, Missouri, and Wisconsin, were completed; two more, Illinois and Kentucky, were laid down but canceled in 1945 and 1958, respectively, before completion, and both hulls were scrapped in 1958–1959.
The Alaska-class were six large cruisers ordered before World War II for the United States Navy (USN), of which only two were completed and saw service late in the war. The USN designation for the ships of this class was 'large cruiser' (CB), a designation unique to the Alaska-class, and the majority of leading reference works consider them as such. However, various other works have alternately described these ships as battlecruisers despite the USN having never classified them as such, and having actively discouraged the use of the term in describing the class. The Alaskas were all named after territories or insular areas of the United States, signifying their intermediate status between larger battleships and smaller heavy and light cruisers.
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