CVA-01

CVA-01
File:CVA-01 (2nd).jpg Official drawing of the CVA-01
Class overview
Operators:	Royal Navy
Preceded by:	Audacious-class fleet carrier Centaur-class light carrier
Succeeded by:	Invincible class
Cancelled:	2
General characteristics
Displacement:	54,500 tons 63,000 at full load
Length:	925 ft (281.94 m)
Beam:	184 ft (37 m)
Draught:	10.2 m
Propulsion:	6 Admiralty boilers with 3 Parsons steam turbines providing 135,000 hp (101,000 kW) to three shafts
Speed:	30 knots (56 km/h)
Range:	7,000 nautical miles (13,000 km)
Complement:	3,250 plus airgroup
Armament:	1 twin Sea Dart Guided Weapon System 30 launcher, 4 x Sea Cat GWS 20
Armour:	unspecified for side and underwater protection
Aircraft carried:	Up to 50 aircraft, with the planned airgroup having 18 x Phantom FG.1; 18 x Buccaneer S.2; 4 x Gannet AEW.3; 4 x Sea King HAS.1; 2 x Wessex HAS.1 (SAR), probably with 1 x Gannet COD.4
Aviation facilities:	2 catapults (reduced from 4), 2 lifts, 1 hangar 650 ft (200 m) by 80 ft (24 m)

The CVA-01 aircraft carrier was to be a class of at least two fleet carriers that would have replaced the Royal Navy's existing aircraft carriers, most of which had been designed prior to or during World War II.

The project was cancelled, along with the proposed Type 82 destroyers that would have escorted them, in the 1966 Defence White Paper, due to inter-service rivalries, the huge cost of the proposed carriers, and the difficulties they would have presented in construction, operation, and maintenance. Had these ships been built, it is likely they would have been named HMS Queen Elizabeth and HMS Duke of Edinburgh or the Invincible class.

Origin

In the 1960s the Royal Navy was still one of the premier carrier fleets in the world, second only to the US Navy which was in the process of building the 80,000 ton Kitty Hawk-class aircraft carriers. The fleet included the fleet carriers HMS Ark Royal, Eagle, and two much smaller carriers, the completely reconstructed Victorious, and the much newer light carrier Hermes both with 3D 984 radar and C3 but limited to air groups of 25 aircraft, at the most 20 fighters and strike aircraft and 5 helicopters or alternatively 16 fighters and strike aircraft and 4 AW Gannets turboprops and 5 helicopters. A fifth carrier, HMS Centaur was modernized to the minimum standard to operate 2nd generation Scimitars and Vixens in 1959, but was never satisfactory or safe for operating nuclear strike aircraft and was a purely interim capability, while Eagle was refitting . Only HMS Ark Royal, and Eagle could potentially operate the US F-4 Phantom and a minimum S2 Buccaneer viable strike squadron of 14 aircraft and a total air group of 48 aircraft, which compared poorly to the 90 available to a Kitty Hawk class ship. The increasing weight and size of modern jet fighters meant that a larger deck area was required for take offs and landings. Although the Royal Navy had come up with increasingly innovative ways to allow ever larger aircraft to operate from the small flight decks of their carriers, the limited physical life left in the existing carriers, none other than Hermes capable of reliable and efficient extension past 1975, and the inability of the Victorious and Hermes, the most effectively and expensively modernized of the carriers to operate the F-4 or an effective and useful number of S2 Buccaneers, made the order of at least 2 new strike carriers essential by the mid 1960's.

Design considerations

Once the Chiefs of Staff had given their approval to the idea of new carriers being necessary, in January 1962, in the strategic paper COS(621)1, British Strategy in the Sixties, the Admiralty Board had to sift through six possible designs. These ranged from 42,000 to 68,000 tons at full load. The largest design, based on the USS Forrestal class, had space for four full sized steam catapults, but was rejected early on as being significantly too costly, particularly in terms of the dockyard upgrades that would be needed to service them. However, the advantages of size were immediately apparent. A 42,000 ton carrier could only hold 27 aircraft, whereas a 55,000 ton carrier could carry 49. This represented an 80% increase in the size of the airgroup for a 30% increase in displacement. Even with these smaller designs, however, cost was already becoming a serious issue. The Treasury and the Air Ministry were pushing for a new set of long-range strike aircraft operating from a string of bases around the globe. For the former this appeared a cost effective solution for the East of Suez issue, and for the latter it meant that the Royal Navy would not get a majority of the defence budget. This meant that by July 1963 it was announced that only one carrier would be built.

Design

File:CVA-01 Other Side.jpg

The CVA-01 would have displaced 54,500 tons (although the ship was said to displace 53,000 tons "in average action condition"), with a flight deck length (including the bridle arrester boom) of 963 ft 3 in (293.60 m) The size of the flight deck, combined with steam catapults and arrester gear would have enabled the carriers to operate the latest jets. The aircraft complement would have included 36 Phantom fighter/ground-attack aircraft and/or Buccaneer low-level strike aircraft, four early-warning aircraft, five anti-submarine helicopters and two search-and-rescue helicopters. The large 'Broomstick' radar dome above the central island on the carrier was planned to be a Type 988 Anglo-Dutch 3D radar, which would subsequently be fitted on the Royal Netherlands Navy Tromp-class frigates, although this would not have been fitted to the final carrier as Britain pulled out of the project.

Cancellation

By early 1963 Minister of Defence Peter Thorneycroft announced in Parliament that one new aircraft carrier would be built, at an estimated cost of £56 million, although the Treasury thought that the final cost was likely to be nearer £100 million. This was based on the carrier using the same aircraft as the Royal Air Force, the Hawker P.1154 supersonic V/STOL aircraft (a larger version of what would become the Hawker Siddeley Harrier). However, after the General Election of October 1964, the new Labour Government wanted to cut back defence spending, and the RAF attacked the Royal Navy's carrier in an attempt to safeguard first its BAC TSR-2 strike/reconnaissance aircraft and then its proposed replacement, the General Dynamics F-111, from the cuts.

The new Government, and by extension Treasury, were particularly concerned about the size issues involved, as these were fluctuating quite frequently. They therefore demanded that the Admiralty keep to 53,000 tons. With the navy unwilling to alter the size of the carrier and its airgroup accordingly the difficulties spiralled, and the final tonnage was much more likely to be nearer 55,000 tons. The design issues also increased, including dramatically reduced top speed, deck space, armour and radar equipment. When the Cabinet met in February 1966, the new Secretary of State for Defence, Denis Healey, strongly supported the RAF and their plan for long-range strike aircraft, by now the F-111, largely due to the costing issues of running fleet carriers. This meeting resulted in the 1966 Defence White Paper. In this paper the CVA-01 was finally cancelled, along with the remainder of the Type 82 destroyers that would have been built as escorts, of which only HMS Bristol was eventually completed. Instead plans were made for the modernisation of Eagle and Ark Royal.

One well-known story about the cancellation of CVA-01 states that the RAF moved Australia by 500 miles in its documents to support the air force's preferred strategy of land-based aircraft. Regardless of the story's veracity, the principal reason for the cancellation was that the Defense Review believed adequate cover, East of Suez could be provided better by RAF strike aircraft flying from bases in Australia and uninhabited Islands in the Indian Ocean than a small carrier fleet in the 1970's which would have still included HMS Hermes. The Review asserted the carrier's only effective use was to project British power east of Suez. The Review, asserted without evidence, that the RN carriers were too 'vulnerable' for the RNs other major theatre in the North Atlantic. When the British government decided later in 1967 that it would withdraw from east of Suez, the case for carriers weakened further in its eyes, and the actual 1966 Review ,stated that the ability of RAF to cover 300 miles offshore was enough for the 1970s, regardless of whether the Air Forces claim to be able to provide air cover out to 700 miles, was contested , and without the 150 (1000 mile strike radius) TRS2 aircraft, cancelled by Labour, mid 1965 which were the real RAF argument for its' island hopping strategy'

Subsequent Royal Navy carriers

Eagle and Ark Royal - Phantomisation

The cancellation of CVA-01 was planned to be compensated for with the minimum further updating of both Eagle and Ark Royal to enable them to operate the 52 F-4 Phantoms ordered to fly from CVA01 and Eagle. However, a later decision was taken to completely phase out fixed-wing flying in the Royal Navy by 1972; Victorious was withdrawn just prior to the start of what was intended to be her final commission in 1969, while Hermes was paid off for conversion to a "commando carrier" in 1971. At the time of the announcement, Ark Royal was beginning, a minimum refit with an austere refit of radar systems, communications, partial electrical rewiring and fittings needed to allow operation of the Phantom, and it was deemed unacceptable either to cancel the much needed work, or to spend such a large amount of money (approx £32m) for less than three years continued use. As a consequence, the decision was taken to retain Ark Royal following her 1967-1970 refit, but not to proceed with a refit of Eagle, in spite of the estimated cost of providing her fittings and blast deflectors to operate, Phantoms being £5m. Eagle decommissioned in 1972, partially due to damage inflicted in a partial grounding a year before and would have probably required a minimum 18 month refit in 1972-3 at a cost of around 40 million pounds to operate till 1977. Many of second squadron of F-4 Phantoms intended for Eagle, were immediately transferred to the RAF and had their tail hooks removed and destroyed early in 1972. Eagle remained officially in reserve as a source of spares to maintain Ark Royal. till 1978, but never could have been reactivated.

"Through Deck Cruiser"

The Royal Navy did not however completely surrender aircraft carrier capability, despite the eventual withdrawal of Ark Royal in 1978. The concept of the "through-deck command cruiser" was first raised in the late 1960s, when it became clear that there was a good chance of the Fleet Air Arm losing fixed-wing capability. The "through-deck cruiser" name was chosen to avoid the stigma of great expense attached to full-size aircraft carriers, with these 20,000 ton ships having significantly less fixed-wing aviation capability than the planned CVA-01 carriers. However, they were to function as part of combined NATO fleets, with a primary mission of providing Cold War anti-submarine patrols in the north-east Atlantic Ocean, in support of the American carrier battle groups.

In order to ensure the safety of the battle group around the "cruiser", the facility to carry the Sea Harrier was added at a late stage of development, the intention being that it could give the battle group the capability to intercept Soviet aircraft without having to rely either on land based or US Navy interceptors. The ultimate result of this was the Royal Navy being able to deploy carrier-based aircraft during the Falklands War. One officer who worked on the CVA-01 believed, however, that had the United Kingdom "built two or three ships to this design, they would now [in 1999] be seen to have been the bargain of the century and they would have made the Falklands War a much less risky operation" due to greater functionality.

CVF

The United Kingdom has returned to the fleet carrier idea, with the construction of a new generation of aircraft carriers larger than the cancelled CVA-01s. The two new carriers are to be named HMS Queen Elizabeth and HMS Prince of Wales. The contract for these vessels was announced on 25 July 2007 by the Secretary of State for Defence Des Browne, ending several years of delay over cost issues and British naval shipbuilding restructuring.

References

• Royal United Services Institute Journal - Aug 2006, Vol. 151, No. 4 By Simon Elliott - CVA-01 and CVF - What Lessons Can the Royal Navy Learn from the Cancelled 1960s Aircraft Carrier for its New Flat-top?
• Gorst, Anthony. (2004). CVA-01. In: Harding, Richard, (eds.) The Royal Navy 1930-2000: innovation and defence. Cass, Abingdon, pp. 170–192. ISBN 0-7146-8581-X

External links

• A comprehensive essay on the history of the CVA-01 design and related issues
• Island Stance