Oakley-class lifeboat: Difference between revisions
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==History== |
==History== |
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During the first half of the twentieth century the RNLI had equipped its lifeboat stations with motor lifeboats designed by [[Watson-class lifeboat|G L Watson]] and, later, [[Barnett-class lifeboat|J R Barnett]]. Both these men had designed boats that were generally stable, but unlike the earlier {{Lbc|Peake}} boats, were not self-righting. Part of the problem was that motor lifeboats were much heavier than pulling and sailing boats, which could be packed with cork to make them buoyant. Richard Oakley worked out how to use shifting water ballast to create a self-righting motor lifeboat.<ref name="srok1">{{cite book|title=Oakley Class Lifeboats: an Illustrated History of the RNLI's Oakley and Rother Lifeboats |first=Nicholas |last=Leach |location=Stroud |publisher=Tempus |year=2003 |isbn=978-0-7524-2784-3}}</ref><ref>{{cite book |last= Wake-Walker |first= Edward |author2=Deane, Heather |author3=Purches, Georgette |title= Lifeboat! Royal National Lifeboat Institution |year= 1989 |publisher= Ian Allan |location= Shepperton |isbn= 0-7110-1835-9 |
During the first half of the twentieth century the RNLI had equipped its lifeboat stations with motor lifeboats designed by [[Watson-class lifeboat|G L Watson]] and, later, [[Barnett-class lifeboat|J R Barnett]]. Both these men had designed boats that were generally stable, but unlike the earlier {{Lbc|Peake}} boats, were not self-righting. Part of the problem was that motor lifeboats were much heavier than pulling and sailing boats, which could be packed with cork to make them buoyant. Richard Oakley worked out how to use shifting water ballast to create a self-righting motor lifeboat.<ref name="srok1">{{cite book|title=Oakley Class Lifeboats: an Illustrated History of the RNLI's Oakley and Rother Lifeboats |first=Nicholas |last=Leach |location=Stroud |publisher=Tempus |year=2003 |isbn=978-0-7524-2784-3}}</ref><ref>{{cite book |last= Wake-Walker |first= Edward |author2=Deane, Heather |author3=Purches, Georgette |title= Lifeboat! Royal National Lifeboat Institution |year= 1989 |publisher= Ian Allan |location= Shepperton |isbn= 0-7110-1835-9 }}</ref> |
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Oakley's {{convert|37|ft|m|adj=on}} prototype was launched in 1958 and placed in service at {{Lbs|Scarborough}}. Production boats started to be built in 1961 and in 1963 the prototype {{convert|48|ft|6|in|m|adj=on}} boat was launched and sent to {{Lbs|Yarmouth}}. The last {{Lbc|Barnett}} was built in 1960 and the final {{Lbc|Watson}} in 1963, after which Oakleys were the only all-weather lifeboats put into service for the next four years.<ref name=Handbook>{{cite book |last= Denton |first= Tony |title= Handbook 2009 |year= 2009 |publisher= Lifeboat Enthusiasts Society |location= Shrewsbury |pages= 22–27 }}</ref> |
Oakley's {{convert|37|ft|m|adj=on}} prototype was launched in 1958 and placed in service at {{Lbs|Scarborough}}. Production boats started to be built in 1961 and in 1963 the prototype {{convert|48|ft|6|in|m|adj=on}} boat was launched and sent to {{Lbs|Yarmouth}}. The last {{Lbc|Barnett}} was built in 1960 and the final {{Lbc|Watson}} in 1963, after which Oakleys were the only all-weather lifeboats put into service for the next four years.<ref name=Handbook>{{cite book |last= Denton |first= Tony |title= Handbook 2009 |year= 2009 |publisher= Lifeboat Enthusiasts Society |location= Shrewsbury |pages= 22–27 }}</ref> |
Revision as of 17:31, 15 December 2020
RNLB Manchester Unity of Oddfellows (ON 960)
| |
Class overview | |
---|---|
Builders |
|
Operators | Royal National Lifeboat Institution |
Preceded by | Liverpool/Watson |
Succeeded by | Rother/Solent |
Cost |
|
Built | 1958–1971 |
In service | 1958–1993 |
Completed |
|
Retired | 31 |
Preserved | 10 |
General characteristics 37ft | |
Displacement | 12 long tons (12 t) |
Length | 37 ft (11 m) |
Beam | 11 ft 6 in (3.51 m) |
Draught | 3 ft 4 in (1.02 m) |
Propulsion | 2 × 43hp Perkins P4M/52hp Ford Thorneycroft/Parsons Porbeagle |
Speed | 8 knots (9.2 mph) |
Complement | 7 |
General characteristics 48ft 6in | |
Displacement | 30 long tons (30 t) |
Length | 48 ft 6 in (14.78 m) |
Beam | 14 ft 0 in (4.27 m) |
Draught | 4 ft 4 in (1.32 m) |
Propulsion | 2 × 110bhp Gardner 6LX |
Speed | 8 knots (9.2 mph) |
Complement | 8 |
The Oakley-class lifeboat refers to two types of self-righting lifeboat operated by the Royal National Lifeboat Institution (RNLI) around the coast of the United Kingdom and Ireland between 1958 and 1993. The 37-foot Oakley was designed for carriage launching, while the larger 48-foot 6-inch version was designed for slipway launching or to lie afloat. During their service they saved a combined total of 1,456 lives in 3,734 rescue launches.
The class is known by the name of its designer, RNLI naval architect Richard Oakley.
History
During the first half of the twentieth century the RNLI had equipped its lifeboat stations with motor lifeboats designed by G L Watson and, later, J R Barnett. Both these men had designed boats that were generally stable, but unlike the earlier Peake-class boats, were not self-righting. Part of the problem was that motor lifeboats were much heavier than pulling and sailing boats, which could be packed with cork to make them buoyant. Richard Oakley worked out how to use shifting water ballast to create a self-righting motor lifeboat.[1][2]
Oakley's 37-foot (11 m) prototype was launched in 1958 and placed in service at Scarborough. Production boats started to be built in 1961 and in 1963 the prototype 48-foot-6-inch (14.78 m) boat was launched and sent to Yarmouth. The last Barnett-class was built in 1960 and the final Watson-class in 1963, after which Oakleys were the only all-weather lifeboats put into service for the next four years.[3]
Design
The Oakley was designed as a self-righting boat. The design combined great stability with the ability to self-right in the event of it capsizing. This was achieved by a system of shifting water ballast. The system worked by the lifeboat taking on one and half tons of sea water at launching in to a tank built into the base of the hull. If the lifeboat then reached a crucial point of capsize the ballast water would transfer through valves to a righting tank built into the port side. If the capsize was to the starboard side of the lifeboat, the water shift started when an angle of 165° was reached. This would push the boat into completing a full 360° roll. If the capsize was to the port side, the water transfer started at 110°. In this case the weight of water combined with the weight of machinery aboard the lifeboat usually managed to stop the roll and allow the lifeboat to bounce back to upright.[citation needed] The water was discharged from the tank when the ship was taken out of the sea after each launch. A problem emerged with damp sand left in the tank after the water was drained. This caused a weak electrolytic action that eroded the copper nails which held the wooden hulls together.[4]
The hull of the Oakley class was constructed from two wooden skins with a layer of calico between. After several years it was found that the calico absorbed water which caused softening of the wood around the copper nails. This led to a series of surveys in the late 1980s and the withdrawal of some boats, or replanking of others.[4] The skins were made from diagonally laid African Mahogany planks. The outer one was 0.375 inches (9.5 mm) thick with the inner 0.25 inches (6.4 mm). The keel was iron and weighed 1.154 tons. The hull was divided into eleven watertight compartments.[citation needed] Two sizes were built. Most boats were 37 feet (11 m) in length and 11 feet 6 inches (3.51 m) in beam. It displaced 12.05 tons when fully laden with crew and gear. Five larger boats were built that were 48 feet 6 inches (14.78 m) long and 14 feet (4.3 m) wide.
The 48ft 6in Oakley
After five years production of the 37ft boat, the RNLI decided to extend the water ballast self-righting principal to a larger boat suitable for slipway launching and lying afloat. In 1962 a prototype boat was built, 48-01 Earl and Countess Howe (ON 968) and in appearance it resembled an extended 42ft Watson-class with a long tapering superstructure running forward from an aft cockpit which was covered, but open to the stern. The boat's water ballast system used 23⁄4 tons of water compared to 11⁄2 tons in the smaller boats. Power came from two 110 bhp Gardner 6LX six cylinder diesel engines, the redesigned and uprated version of the engine fitted to the last ten 52ft Barnett class boats. Displacing 29 tons and built at a cost of £40,000, RNLB The Earl and Countess Howe (ON 968) was the first RNLI lifeboat to be built with radar installed and went on station at Yarmouth in February 1963. It was four years before further examples were built, by which time a major redesign of the superstructure had resulted in the Mk. II version. In this an enclosed wheelhouse was positioned amidships, accessed by sliding doors on either side at the forward end. Behind the wheelhouse was an aft cabin which could accommodate a loaded stretcher. Initially, radio aerials were rigged between the foremast and a bipod mast at the back of the aft cabin, on the roof of which the radar scanner was mounted on a pylon. Later, the masts were removed and twin pole aerials fitted to the aft cabin just behind the wheelhouse with a small tripod mast fitted to the wheelhouse roof. RNLB Ruby and Arthur Reed (ON 990) went on station at Cromer in March 1967, followed by RNLB James and Catherine Macfarlane (ON 989) which took up duties at Padstow in July 1967.
Attention now turned to a steel-hulled development of the 48 ft 6 in Oakley which would dispense with the complex water ballast system and achieve its self-righting capability from a watertight superstructure. This emerged as the Solent class and initial orders for eight boats were placed with Operational Numbers following on from the Oakleys (48-004 to 48-011, the three digit second part of the number indicating a metal hull). Two final Oakleys were then ordered, taking Operational Numbers 48-12 and 48-13. The first of these, 48-12 Charles Henry (ON 1015) went on station at Selsey in January 1969, a few months before the first Solent. 48-13 Princess Marina (ON 1016) began service at Wick in July 1970.
Like the smaller boats, the 48 ft 6 in Oakleys were prone to hull deterioration through electrolysis and were not considered for sale for further use. Initially, all five boats were put on display at various locations, but two, 48-01 and 48-13 were subsequently broken up. After ten years on display, 48-12 was sold to a private owner who removed the water ballast system and put the boat back on the water, leaving 48-02 and 48-03 on public display at Lands End and Hythe Marina respectively. 48-02 James and Catherine MacFarlane after being out in the open at Lands End since 1988, has been sold to a private owner in July 2016 and moved to Berkshire for restoration.
Fleet
37 foot boats
ON[a] | Op. No.[b] | Name | Built | Builder | In service | Principal stations | Further use[3] |
---|---|---|---|---|---|---|---|
942 | 37-01 | J.G. Graves of Sheffield | 1958 | William Osborne, Littlehampton |
1958–1978 1979–1988 1988–1991 1992–1993 |
Scarborough Relief fleet Clogher Head Newcastle |
Preserved at Chatham Historic Dockyard |
960 | 37-02 | Manchester Unity of Oddfellows | 1961 | William Osborne, Littlehampton |
1961–1990 | Sheringham | Sold April 1991. Preserved at Sheringham |
961 | 37-03 | Calouste Gulbenkian | 1961 | J. Samuel White, Cowes |
1962–1969 1970–1990 1990–1991 |
Weston-super-Mare Relief fleet New Quay |
Sold November 1991. Under restoration at Donaghadee |
966 | 37-04 | Robert and Dorothy Hardcastle | 1962 | Groves and Guttridge, Cowes |
1962–1968 1968–1991 1991–1993 |
Boulmer Filey Relief fleet |
Sold April 1993. Preserved at Hartlepool |
972 | 37-05 | The Will and Fanny Kirby | 1963 | William Osborne, Littlehamton |
1963–1979 1979–1983 1983–1993 |
Seaham Relief fleet Flamborough |
Preserved at Chatham Historic Dockyard |
973 | 37-06 | Fairlight | 1964 | William Osborne, Littlehampton |
1964–1988 1988–1989 1989–1990 1991–1992 |
Hastings Relief fleet St Ives New Quay |
Sold October 1994. Pleasure boat at Blakeney Harbour |
974 | 37-07 | Jane Hay | 1964 | William Osborne, Littlehampton |
1964–1974 1974–1980 1980–1992 |
St Abbs Relief fleet Newcastle |
Broken up at Arklow 1995 |
975 | 37-08 | Sir James Knott | 1963 | Groves and Guttridge, Cowes |
1963–1969 1969–1972 1972–1985 1985–1990 |
Cullercoats Relief fleet Redcar Relief fleet |
Sold 1990. Preserved at Redcar |
976 | 37-09 | Lilly Wainwright | 1964 | Groves and Guttridge, Cowes |
1964–1990 1990–1992 |
Llandudno Kilmore Quay |
Sold September 1993. Pleasure boat at Cobh |
977 | 37-10 | Charles Fred Grantham | 1964 | Groves and Guttridge, Cowes |
1964–1990 1990–1991 1991–1992 |
Skegness Scarborough Relief fleet |
Broken up 1993 |
978 | 37-11 | The Royal Thames | 1964 | J. Samuel White, Cowes |
1964–1969 1970–1978 1979–1991 1991–1993 |
Caister Runswick Pwllheli Clogher Head |
Sold 1994 |
979 | 37-12 | James and Catherine Macfarlane (1964-1967) Amelia (1967-1991) |
1964 | J. Samuel White, Cowes |
1964–1978 1978–1991 |
Relief fleet Scarborough |
Sold February 1992. Preserved at Charlestown |
980 | 37-13 | William Henry and Mary King | 1964 | J. Samuel White, Cowes |
1964–1967 1967–1988 1989–1990 |
Cromer No.2 Bridlington North Sunderland |
Children's playground, Highbury, London |
981 | 37-14 | Mary Pullman | 1964 | William Osborne, Littlehampton |
1965–1989 | Kirkcudbright | Hull on display at Spalding |
982 | 37-15 | Ernest Tom Neathercoat | 1965 | William Osborne, Littlehampton |
1965–1990 1990–1991 |
Wells North Sunderland |
Under restoration |
983 | 37-16 | The Doctors | 1965 | William Osborne, Littlehampton |
1965–1991 1991–1993 |
Anstruther Relief fleet |
Sold 1993. Under restoration at Donaghadee |
984 | 37-17 | Mary Joicey | 1966 | Herd and McKenzie, Buckie |
1966–1981 1981–1989 |
Newbiggin Relief fleet |
Under restoration for display at Newbiggin |
985 | 37-18 | Valentine Wyndham-Quin | 1967 | Herd and McKenzie, Buckie |
1968–1984 1984–1988 |
Clacton-on-Sea Clogher Head |
Preserved at Harwich |
986 | 37-19 | Lloyds II | 1966 | Morris and Lorimer, Sandbanks |
1966–1990 1990–1992 |
Ilfracombe Sheringham |
Broken up 1993 |
991 | 37-20 | Edward and Mary Lester | 1967 | William Osborne, Littlehampton |
1967–1989 | North Sunderland | Broken up 1989 |
992 | 37-21 | Frank Penfold Marshall | 1968 | William Osborne, Littlehampton |
1968–1989 | St Ives | Broken up 1989 |
993 | 37-22 | Har Lil | 1968 | William Osborne, Littlehampton |
1968–1990 | Rhyl | Sold December 1991. Under restoration at South Ferriby |
994 | 37-23 | The Vincent Nesfield | 1969 | William Osborne, Littlehampton |
1969–1972 1972–1973 1973–1989 1989–1991 1991–1993 |
Relief fleet Port Erin Relief fleet Kilmore Quay Relief fleet |
Broken up by 1995 |
995 | 37-24 | James Ball Ritchie | 1970 | William Osborne, Littlehampton |
1970–1991 | Ramsey | Broken up 1992 |
996 | 37-25 | Birds Eye | 1970 | William Osborne, Littlehampton |
1970–1990 | New Quay | Preserved at Moelfre |
997 | 37-26 | Lady Murphy | 1971 | William Osborne, Littlehampton |
1972–1988 | Kilmore Quay | Broken up 1995 |
48 foot 6 inch boats
All built by William Osborne, Littlehampton except ON 989, Berthon Boat Co., Lymington
ON[a] | Op. No.[b] | Name | Built | In service | Principal stations | Further use[3] |
---|---|---|---|---|---|---|
968 | 48-01 | The Earl and Countess Howe | 1963 | 1963–1977 1977–1984 |
Yarmouth Walton and Frinton |
Displayed at RNLI Depot, Poole 1984-2004. Broken up 2004 |
989 | 48-02 | James and Catherine Macfarlane | 1967 | 1967–1983 1983–1987 |
Padstow The Lizard |
On display at Land's End |
990 | 48-03 | Ruby and Arthur Reed | 1966 | 1967–1984 1985–1988 |
Cromer St Davids |
On display at Hythe |
1015 | 48-12 | Charles Henry | 1968 | 1969–1984 1984–1987 |
Selsey Baltimore |
Displayed at Merry Hill, Dudley 1989-1999. Pleasure boat at Exeter |
1016 | 48-13 | Princess Marina | 1970 | 1970–1988 | Wick | Displayed at National Lifeboat Museum, Pitsea. Broken up 2003 |
References
- ^ Leach, Nicholas (2003). Oakley Class Lifeboats: an Illustrated History of the RNLI's Oakley and Rother Lifeboats. Stroud: Tempus. ISBN 978-0-7524-2784-3.
- ^ Wake-Walker, Edward; Deane, Heather; Purches, Georgette (1989). Lifeboat! Royal National Lifeboat Institution. Shepperton: Ian Allan. ISBN 0-7110-1835-9.
- ^ a b c Denton, Tony (2009). Handbook 2009. Shrewsbury: Lifeboat Enthusiasts Society. pp. 22–27.
- ^ a b Kipling, Ray; Kipling, Susannah (2006). Never Turn Back. Stroud: Sutton Publishing. pp. 87–88. ISBN 0-7509-4307-6.