HMS Eagle (R05)

HMS ''Eagle'' was an of the Royal Navy, in service 1951–1972. Until the arrival of the s in the 21st century, she and her sister were the two largest Royal Navy aircraft carriers ever built.

She was laid down on 24 October 1942 at Harland and Wolff shipyard in Belfast as one of four ships of the ''Audacious'' class. These were laid down during World War II as part of the British naval buildup during that conflict. Two were cancelled at the end of hostilities, and the remaining two were suspended. Originally designated ''Audacious'', she was renamed as ''Eagle'' (the fifteenth Royal Navy ship to receive this name), taking the name of the cancelled third ship of the class on 21 January 1946. She was finally launched by Princess Elizabeth on 19 March 1946.Brown 1972, p. 20.

Although ''Eagle'' was completed in October 1951 without an angled flight deck, one was added three years later. In 1952 she took part in the first large NATO naval exercise, Exercise Mainbrace.

Design and construction

The s were intended as a larger follow-on to the of aircraft carriers with armoured hangars, with the design being modified prior to orders being placed to accommodate larger and heavier aircraft, which led to the displacement growing from the originally planned to by the time the ships were ordered.Chesneau 1998, pp. 134–135.Brown 2012, pp. 52–53. Four ships were ordered, although one, ''Africa'', was cancelled before construction began.Brown 2012, p. 53.Chesneau 1998, p. 135.

The first of the class, ''Audacious'' was laid down at Harland & Wolff's Belfast shipyard on 24 October 1942. Construction was slowed by the need to concentrate resources on more urgent requirements, such as the construction of landing craft, and none of the ships of the class had been launched when end of the Second World War brought large cuts in the shipbuilding programme for the Royal Navy.Brown and Moore 2012, pp. 18–19. The third ship of the class, ''Eagle'', which was only 26% complete, was cancelled in December 1945,Brown and Moore 2012, p. 19. with ''Audacious'' being renamed ''Eagle'' on 21 January 1946. The newly renamed ''Eagle'' was launched by Princess Elizabeth on 19 March 1946, but construction of the two carriers was slowed for three years while the Royal Navy's requirements for aircraft carriers was reviewed, it being eventually decided to complete ''Eagle'' to a similar standard to that planned in 1945, while ''Ark Royal'' would be completed to an improved design.Chesneau 1998, pp. 135, 137. ''Eagle'' was finally completed on 1 October 1951.

As built, ''Eagle'' was long overall, at the waterline and between perpendiculars, with a beam of and a draught of at deep load.Chesneau 1998, p. 134. Displacement was standard,Brown 1972, p. 27. with full load of up to . Eight Admiralty three-drum water-tube boilers fed steam to Parsons single-reduction geared steam turbines rated at which in turn drove four propeller shafts. This gave a speed of at deep load.Blackman 1960, p. 11.

Service

''Eagle'' started Sea trials on 31 October 1951, with initial flying trials starting on 14 February 1952 and the ship being accepted into service on 1 March 1952. ''Eagle'' continued to work up her crew, embarking an initial air wing equipped with two squadrons of Supermarine Attacker jet fighters, two squadrons of Fairey Firefly anti-submarine aircraft and a squadron of Blackburn Firebrand attack aircraft, and in September 1952, took part in the big NATO naval exercise, Exercise Mainbrace off the coast of Norway and Denmark.Brown 1972, pp. 20–21.

In early 1953 ''Eagle'' visited the Mediterranean, before returning to home waters when in June she took part in the Fleet Review at Spithead to celebrate the Coronation of Queen Elizabeth II.Brown 1971, p. 21. She joined the Mediterranean Fleet in February 1954, before returning to British waters in May.

''Eagle'' was refitted at Devonport Dockyard from June 1954 to February 1955. In order to ease operations with jet aircraft, the ship was fitted with a 5.5 degree angled flight deck, which owing to the width of ''Eagle''s flight deck, could be accommodated without major structural changes, although it required the ship's arrestor gear to be rearranged, and removal of nine Bofors guns (one Mark-6 six barrelled mount and three single mounts). A mirror landing aid was also fitted.Brown 1971, pp. 21–22. Following work-up, ''Eagle'' deployed to the Mediterranean before taking part in the autumn NATO exercises in the North Atlantic. In May 1956, ''Eagle'' was deployed to Malta to work up for another stint in the Mediterranean Fleet.Brown 1971, p. 22.

''Eagle''s first wartime service came in 1956, when she took part in the Suez Crisis. The ship's aircraft of that period included Westland Wyverns, Douglas Skyraiders, Hawker Sea Hawks and de Havilland Sea Venoms.

Rebuild

The Admiralty had originally planned to give ''Eagle'' a complete rebuild on the lines of , but due to high costs, plans to fit new geared steam turbines and a stretched hull were abandoned. ''Eagle'' was instead given a more austere but extensive modernization that provided greater radar and processing capability than the systems fitted to ''Victorious''. The changes included major improvements to the accommodation, including the installation of air conditioning. The island was completely rebuilt and a 3D Type 984 radar was installed, with processing capacity to track and rank 100 targets, twice the capability of the early 984 system fitted to ''Hermes'' and ''Victorious''. The flight deck was modified and included a new 2½ inch armoured deck with a full 8.5 degree angle, two new steam catapults (BS5s, stroke on the port side forward and stroke in the waist) were fitted as well as new arrester gear (DAX I) and mirror sights. As well as an overhaul of the DC electrical systems, AC generators were also fitted to give additional power.

It was decided that ''Eagle'' would have her anti-aircraft guns removed and replaced by the Seacat missile system, though her aft four 4.5 inch gun turrets were retained, and all of her original machinery and equipment would be fully overhauled.

In 1959 ''Eagle'' entered Devonport Dockyard to begin this extensive refit, and by May 1964 it was complete. Standard displacement had increased to around 44,100 tons (full load displacement was 54,100 tons)Gardiner and Chumbley 1995, p. 497.Chesneau 1998, p. 138. and ''Eagle'' was now the largest aircraft carrier in the Royal Navy. Total cost of the refit was £31 million.Blackman 1971, p. 332. The refit was intended to extend her operational life for another 10 years, and she now operated Blackburn Buccaneer, de Havilland Sea Vixen, Supermarine Scimitar and Fairey Gannet aircraft, but water-cooled jet blast deflectors (needed to operate the RN Phantom fighters) were not fitted, and therefore the full potential of the ship was not realized. In 1964-5 it was claimed ''Eagle'' and the proposed CVA01 and half sized ''Hermes'' would be a viable three carrier fleet until 1980. ''Victorious'' would have been replaced by CVA01 in 1973. In reality the 1958 Royal Navy assessment was that with affordable modernization of the existing carrier fleet, only HMS ''Hermes'' would be effective after 1975, and she was too small. These assessments by the Director of Naval Construction in November 1958 were very accurate, taking into account the slower than expected pace of reconstruction, corrosion of war-built hulls, the obsolete power trains except in ''Victorious'', and the cheap unsatisfactory mix of DC electrics with AC add-on generators where needed in ''Eagle'' and ''Ark Royal''.

Refit

In early 1966 ''Eagle'' was refitted at Devonport once more and was fitted with a single DAX II arrestor wire (no.3, her other wires were DAX I). She was recommissioned in 1967.

''Eagle'' was originally intended to receive a further refit that would have enabled her to comfortably operate the McDonnell Douglas Phantom (she had already successfully operated them in trials). Her two BS5 catapults fitted in her 1959–64 refit were already powerful enough to launch fully laden F-4s, but her Jet Blast Deflectors were still of the older steel plate design, and the reheated exhaust of the Phantom's Rolls-Royce Spey engines required water-cooled deflector plates. It was also planned to fit bridle catchers to the catapults as a cost-saving measure, as the bridles would otherwise be lost after a single launch.

During the Phantom FG1 trials (involving three newly delivered aircraft operated by 700P NAS) the longer waist catapult was used, and a thick steel plate was chained to the deck behind the catapult to absorb the heat of the Phantom's afterburners. The JBD was not used as it would have been damaged, and after each launch fire hoses sprayed water on the deck plate to cool it down before the next aircraft could be loaded onto the catapult.

While fitting adequate blast deflectors and other minor changes for Phantom operation were estimated to cost no more than £5 million in 1968, refitting the ship to operate with a modern airgroup of Phantoms into the late 1970s was clearly going to cost much more, and the new Conservative government in 1970 confirmed plans to convert to a Commando carrier and withdraw ''Eagle''. In February 1972, the Secretary of State for Defence, Lord Carrington, estimated refitting ''Eagle'' to operate Phantoms would cost £25–30 million, and the overall manpower and cost requirements of operating two large strike carriers were beyond Britain, particularly as ''Ark Royal'' was expected to serve to the end of the 1970s with only two short refits. To preserve ''Eagle'' in maintained or unmaintained reserve would require refits, estimated at around £4 million, every 3–4 years, and maintenance crew of 350–400 Navy personnel for £1.5–2 million a year. Reactivation would take four and a half months to a year, while maintaining a Sea Vixen squadron was unjustified expense for aircraft that were obsolete. The refit of ''Ark Royal'' cost £32 million to allow operations of a fully modern airwing, though it was generally accepted that even after her return to service she considered to be in a significantly worse overall material state in comparison to ''Eagle''. Of the 48 Phantom FG1s ordered for the FAA, 20 were diverted to the RAF equipping 43 Sqn, though some were loaned back to the Navy to equip the Phantom FG1 training unit 767 NAS which trained both RN and RAF Phantom crews until it was disbanded in 1972.

Decommissioning

The 1966 decision to run-down the RN fixed wing carrier fleet (''Centaur'' had already been laid up as an accommodation ship, and ''Victorious'' was soon to be prematurely scrapped, following a minor fire) meant ''Eagle''s days were numbered. ''Eagle'' was paid off in January 1972 at Portsmouth after 20 years and 4 months of service, and was stripped of reusable equipment (radars and missile systems primarily), after which she was towed to Devonport where she was placed in reserve and moored in a stretch of the River Tamar known as the Hamoaze. In 1974, she was released from her moorings, towed up river, and secured in number 10 Dock, Devonport Dockyard, where she was further stripped of essential spares for ''Ark Royal'', before being towed back to her mooring position.

Up until 1976 she was officially still in reserve, but having been exhausted as a source of spares for ''Ark Royal'', ''Eagle'' was then sold for scrap and towed from Devonport on 14 October 1978 to Cairnryan near Stranraer to be broken up, clearing her mooring space for her sister and arriving there five days later. The lower hull of ''Eagle'' was still being broken up when her sister ''Ark Royal'' arrived at Cairnryan for demolition on 28 September 1980.Holme, Richard, ''Cairnryan Military Port 1940–1996'', G.C.Book Publishing, 1997 page 38-42 One of her anchors (along with one of ''Ark Royal''s) stands guard at the entrance to the Fleet Air Arm Museum in Yeovilton.

See also

* Type 984 radar

Notes

References

Sources

* Blackman, Raymond V. B. ''Jane's Fighting Ships 1960–61''. London: Sampson Low, Marston & Co. Ltd., 1960.
* Blackman, Raymond V. B. ''Jane's Fighting Ships 1971–72''. London: Sampson Low, Marston & Co Ltd, 1971. .
* Blackman, Raymond. ''Ships of the Royal Navy''. London: Macdonald and Jane's, 1973.
* Brown, David. ''Carrier Air Groups: HMS Eagle''. Windsor, UK: Hylton Lacy, 1972. .
* Brown, David K. ''Nelson to Vanguard: Warship Design and Development 1923–1945''. Barnsley, UK: Seaforth Publishing, 2012. .
* Brown, David K. and Moore, George. ''Rebuilding the Royal Navy: Warship Design Since 1945''. Barnsley, UK: Seaforth Publishing, 2012. .
* Chesneau, Roger. ''Aircraft Carriers of the World, 1914 to the Present: An Illustrated Encyclopedia''. London: Brockhampton Press, 1998. .
* Gardiner, Robert and Stephen Chumbley. ''Conway's All The World's Fighting Ships 1947–1995''. Annapolis, Ma, USA:Naval Institute Press, 1995. .
* McCart, Neil. ''HMS Eagle 1942–1978''. Cheltenham, UK: Fan Publications, 1996. .

"The NATO Exercises: Part I: The Overall Picture: Mainbrace"
''Flight'', Vol. LXII, Issue 2279, 26 September 1952, pp. 402–404.

"The NATO Exercises: Part II: Flying with the Hold Fast Squadrons: Last Phases of Mainbrace"
''Flight'', Vol. LXII, Issue 2280, 3 October 1952, pp. 449–454.

External links

HMS Eagle homepage
*https://rnzaf.proboards.com/thread/7590/hms-eagle-visit-1971 - dummy attack on HMS Eagle by No. 75 Squadron RNZAF, 1971

{{DEFAULTSORT:Eagle (R05)
Audacious-class aircraft carriers
Ships built in Belfast
1946 ships
Cold War aircraft carriers of the United Kingdom
Ships built by Harland and Wolff
Maritime incidents in 1978