LNER Class A4 4468 Mallard
||This article includes a list of references, but its sources remain unclear because it has insufficient inline citations. (July 2011)|
|"Mallard" at the National Railway Museum at York.|
|Designer||Sir Nigel Gresley|
|Builder||LNER Doncaster Works|
|Build date||3 March 1938|
|Gauge||4 ft 8 1⁄2 in (1,435 mm)|
|3 ft 2 in (0.965 m)|
|Driver diameter||6 ft 8 in (2.032 m)|
|3 ft 8 in (1.118 m)|
|Length||70 ft (21.34 m)|
|Locomotive weight||102.95 long tons (104.6 t)|
|Locomotive & tender
|165 long tons (167.6 t)|
|Boiler pressure||250 psi (1.72 MPa)|
|Cylinder size||18.5 in × 26 in (470 mm × 660 mm)|
|Tractive effort||35,455 lbf (157.7 kN)|
|Withdrawn||25 April 1963|
|Restored||1986 until 1988|
|Disposition||Displayed at the National Railway Museum, York|
Number 4468 Mallard is a London and North Eastern Railway Class A4 4-6-2 Pacific steam locomotive built at Doncaster, England in 1938. It is historically significant because it is the holder of the world speed record for steam locomotives.
The A4 class was designed by Sir Nigel Gresley to power high-speed streamlined trains. The wind-tunnel-tested, aerodynamic body and high power allowed the class to reach speeds of over 100 miles per hour (160 km/h), although in everyday service it was relatively uncommon for any steam hauled service in the UK to reach even 90 mph, much less 100. Mallard covered almost one and a half million miles (2.4 million km) before it was retired in 1963.
It was restored to working order in the 1980s, but has not operated since, apart from hauling some specials between York and Scarborough in July 1986 and a couple of runs between York and Harrogate/Leeds around Easter 1987. Mallard is now part of the National Collection at the United Kingdom's National Railway Museum in York. On the weekend of 5 July 2008, Mallard was taken outside for the first time in years and displayed beside the three other A4s that are resident in the UK, thus reuniting them for the first time since preservation. It departed the museum for Locomotion, the NRM's outbase at Shildon on the 23 June 2010, where it was a static exhibit, until it was hauled back to York on 19 July 2011 and put back on display in its original location in the Great Hall.
Mallard is the holder of the world speed record for steam locomotives at 125.88 mph (202.58 km/h). The record was achieved on 3 July 1938 on the slight downward grade of Stoke Bank south of Grantham on the East Coast Main Line, and the highest speed was recorded at milepost 90¼, between Little Bytham and Essendine. It broke the German (DRG Class 05) 002's 1936 record of 124.5 mph (200.4 km/h).
Mallard was the perfect vehicle for such an endeavour. The A4 class was designed for sustained 100+ mph (160+ km/h) running and Mallard was one of a few of the class that were built with a double chimney and double Kylchap blastpipe, which made for improved draughting and better exhaust flow at speed. (The remainder of the class were retro-fitted in the late 1950s). The A4's three-cylinder design made for stability at speed, and the large 6 ft 8 in (2.03 m) driving wheels meant that the maximum revolutions per minute was within the capabilities of the technology of the day. Mallard was five months old, meaning that it was sufficiently broken-in to run freely, but not overly worn. Selected to crew the locomotive on its record attempt were driver Joseph Duddington (a man renowned within the LNER for taking calculated risks) and fireman Thomas Bray.
The locomotive had previously had problems with the big end bearing for the middle cylinder, so the big end was fitted with a "stink bomb" of aniseed oil which would be released if the bearing overheated. Shortly after attaining the record speed, the middle big end did overheat and Mallard had to limp onwards to Peterborough. It then travelled to Doncaster for repair. This had been foreseen by the publicity department, who had many pictures taken for the press, in case Mallard did not make it back to Kings Cross. The (Edwardian period) Ivatt Atlantic that replaced Mallard at Peterborough was only just in sight when the head of publicity started handing out the pictures.
Stoke Bank has a gradient of between 1:178 and 1:200. Mallard, pulling a dynamometer car and six coaches, topped Stoke Summit at 75 mph (121 km/h) and accelerated downhill. The speeds at the end of each mile (1.6 km) from the summit were recorded as: 87½, 96½, 104, 107, 111½, 116 and 119 mph (141, 155, 167, 172, 179, 187 and 192 km/h); half-mile (800 m) readings after that gave 120¾, 122½, 123, 124¼ and finally 125 mph (194, 197, 198, 200 and 201 km/h). The speed recorded by instruments in the dynamometer car reached a momentary maximum of 126 mph (203 km/h).
On arrival at King's Cross (just after the run) driver Joe Duddington and Inspector Sid Jenkins were quoted as saying that they thought a speed of 130 mph would have been possible if the train had not had to slow for the junctions at Essendine. In addition at the time of the run there was a permanent way restriction to 15 mph just north of Grantham which slowed the train as they sought to build up maximum speed before reaching the high speed downhill section just beyond Stoke tunnel.
On 3 July 2013, Mallard celebrates 75 years since achieving the world speed record, and to help commemorate this date all five of her surviving Class A4 sister locomotives will gather around the turntable in the Great Hall of the National Railway Museum at York for a two-week 'great gathering'. The visitors include three UK based, privately owned engines in 4464 Bittern, 60007 Sir Nigel Gresley and 60009 Union of South Africa. Two of Mallard's internationally based sisters, 60008 Dwight D. Eisenhower and 60010 Dominion of Canada, will also attend after completing extensive transatlantic journeys, and undergoing cosmetic restoration makeovers at the NRM's workshops.
Rival claims 
Mallard's world record has never been officially exceeded by a steam locomotive, though the German Class 05 was at least very close: in 1936, two years before Mallard's run, 05 002 had reached 200.4 km/h (124.5 mph) between Hamburg and Berlin. Stoke Bank is long, straight and slightly downhill, whereas the 1936 run of 05 002 took place on a horizontal stretch of track. Unlike world records for cars and aircraft, there is no requirement for an average of two runs in both directions, and assistance from gradient or wind has always been acceptable in rail speed records. Also, unlike Mallard, 05 002 survived the attempt undamaged: on the other hand, its train was only four coaches long (197 tons), but Mallard`s train was seven coaches (240 tons). In terms of rival claims, Gresley and the LNER had just one serious attempt at the record, which was far from a perfect run with a 15mph permanent way check just North of Grantham. Despite this a record was set. Gresley planned to have another attempt in September 1939, but this was prevented by the outbreak of World War II. Before the record run on 3 July 1938, it was calculated that 130 mph (210 km/h) was possible, and in fact Driver Duddington and LNER Inspector Sid Jenkins both said they might well have achieved this figure had they not had to slow for the Essendine junctions.
There are reports of higher speeds from North American steam locomotives, although none of these records was officially documented. Locomotives which are rumoured to have exceeded the 126 mph (203 km/h) record include the Pennsylvania Railroad's S1 prototype which was unofficially clocked at 127.1 miles per hour, and the Milwaukee Road class F7. The Milwaukee Road had the fastest scheduled steam-powered passenger trains in the world. Both it and the Chicago & North Western (see CNW Class E-4) had timetables requiring running in excess of 100 mph (160 km/h); it is believed that both railroads' locomotives exceeded 120 mph (190 km/h). However, to put matters into perspective a letter from D.P Morgan (editor of the US Trains magazine) quoted in the Journal of the Stephenson Locomotive Society (Jan 1980) is worth quoting :
I`m afraid that you`ll not find authenticated records covering maximum speeds attained by Pennsylvania Railroad`s 6100 (S1) or its related T1 duplex-drive machine. The "records" were unofficial, the experiences related by engine crews, and with the passing of years many have either retired or died. Train timing on this side of the Atlantic is simply not of the quality or quantity you are familiar with in the UK or on the Continent.
The letter is also quoted in Peter Semmens Speed on the East coast Mainline (p72/73), and Semmens goes on to state that the accuracy of mileposts (used in train timing) in the United States varies quite markedly, often they are just attached to the nearest telegraph pole.
Thus, Mallard still officially holds the record; plaques affixed to each side of the locomotive commemorate the feat.
1948 Locomotive Exchange Trials 
In 1948, shortly after the formation of British Railways, the decision was taken to test locomotives from all of the former 'Big Four' companies to find the best attributes of speed, power and efficiency with coal and water. There were two ways of testing and comparing locomotives: either at the Rugby Locomotive testing plant, which was not ready until late 1948 or by testing in the field itself. The results of these trials would be used to help design the British Railways Standard design of locomotives.
The express passenger locomotive designs which would be compared were: London Midland Region (former LMS) Princess Coronation class, Eastern Region (former LNER) Class A4, Southern Region (former Southern) Merchant Navy class and Western Region (former GWR) 6000 Class or King class.
Three Gresley A4 locomotives were chosen to represent the Eastern Region: E22 Mallard, 60033 Seagull and 60034 Lord Faringdon. All of the locomotives had the Kylchap double blastpipe chimney arrangement and were fresh from Doncaster works. Mallard had emerged from Doncaster with a fresh coat of post-war garter blue livery, stainless steel numbers 22 with a small 'E' painted above them (for Eastern region), new boiler (its fourth) and third tender of its career.
E22 Mallard was used on 8 June 1948 on the Waterloo-Exeter route. Driver Marrable took the famous A4 with a load of 481 tons tare, 505 tons full, the same that had been used on the previous trip by 35018 British India Line. Mallard reached Clapham Junction in 6 minutes 57 seconds and Woking in 28 minutes 47 seconds. At Hook there were adverse signals, causing Mallard to slow to a crawl. Even so, Salisbury was reached in 108 minutes and 28 seconds. Despite the signals earlier, the train was only 5-and-a-half minutes late. The net time was 95.5 minutes.
Mallard failed after this trial and 60033 Seagull took over. On 10 June Seagull achieved the run in 96 minutes 22 seconds, but had departed 3 minutes late, meaning Seagull had arrived with the same load 3.5 minutes early. For Mallard, the 1948 Locomotive Exchange Trials were over, but Mallard returned to the Waterloo-Exeter line for a Locomotive Club of Great Britain (LCGB) railtour in 24 February 1963.
Technical specifications 
Mallard was released into traffic for the first time on 3 March 1938. It was the first A4 to be fitted with a Kylchap double blast pipe from new. This was one of the factors that led to its selection for the attempt on the world rail speed record in the following July.
Mallard wore a variety of liveries throughout its career. These were: garter blue as 4468, LNER wartime black from 13 June 1942, later wartime black with the tender marked as "NE" from 21 October 1943 as 22 with yellow small stencilled numbers, post-war garter blue with white and red lining from 5 March 1948 with stainless steel cabside number 22, British railways dark blue as 60022 from 16 September 1949, Brunswick green from 4 July 1952 and its original LNER garter blue for preservation in 1963.
The A4 class was built with streamlined valances, or side skirting, but this was removed during the war to ease maintenance. Mallard lost its valances during a works visit 13 June 1942, regaining them in preservation in 1963.
Mallard was fitted with twelve boilers during its 25 year career. These boilers were: 9024 (from construction), 8959 (from 4496 Golden Shuttle, 13 June 1942), 8907 (from 2511 Silver King, 1 August 1946), 8948 (from 31 Golden Plover, 5 March 1948), 8957 (from 60009 Union of South Africa, 16 September 1949), 29282 (from 60028 Walter K Whigham, 10 January 1951), 29301 (from 60019 Bittern, 4 July 1952), 29315 (from 60014 Silver Link, 23 April 1954), 29328 (new-build boiler, 7 June 1957), 29308 (from 60008 Dwight D. Eisenhower, 27 August 1958), 29310 (from 60009 Union of South Africa, 9 March 1960) and 27965 (from 60009 Union of South Africa, 10 August 1961).
Mallard has had seven tenders throughout its career. It started off with a non-corridor tender in 1938, had corridor design tenders during its British Railways days and was fitted with a non-corridor tender in 1963 to recreate its original appearance. The tenders it has been fitted with are: 5642 (3 March 1938 - 14 March 1939), 5639 (5 May 1939 - 16 January 1948), 5323 (5 March 1948 - 12 March 1953), 5648 (12 March 1953 - 21 July 1958), 5330 (27 August 1958 - 30 May 1962), 5651 (30 May 1962 - 25 April 1963) and 5670 (current tender, masquerading as original tender 5642).
Mallard was allocated to three sheds during its career: Doncaster, transferring on 21 October 1943 to Grantham and on 11 April 1948 to Kings Cross ('Top Shed').
Two A4s were exported after retirement, one to the USA (No. 60008 (LNER No. 4496) Dwight D. Eisenhower) and the other to Canada (No. 60010 (LNER No. 4489) Dominion of Canada). In October 2012, they came back to prepare for the 75th anniversary celebrations in 2013 of the record run. They and Mallard will be joined at the National Railway Museum by No. 4464 (BR. No. 60019) Bittern, No. 60007 (LNER No. 4498) Sir Nigel Gresley and No. 60009 (LNER No. 4488) Union of South Africa. No. 60008 will have its BR Brunswick Green livery refreshed and No. 60010 will be re-painted in LNER Garter Blue with stainless steel lettering and numbers and fitted with the Canadian bell and whistle.
Bachmann and Hornby released models of Mallard several times in Garter Blue. Hornby released a model of Mallard in BR Express Passenger Blue and a limited edition model in BR Brunswick Green. Hornby will also release a limited edition model of 4468 in LNER form along with the other 5 surviving A4's in 2013.
In popular culture 
|This section does not cite any references or sources. (June 2012)|
- Mallard features in the Thomas the Tank Engine book, Thomas and the Great Railway Show (with a face on), and is also mentioned in Gordon the High Speed Engine.
- A painting of Mallard features on the 1993 Blur album Modern Life is Rubbish.
- Solomon, Brian (2003). "Fast Trains and Streamlined Pacifics". Railway masterpieces. Newton Abbot, England: David and Charles. p. 28. ISBN 978-0-7153-1743-3.
- "Men who served on Mallard prepare to be reunited with famous locomotive".
- Semmens, P.W.B. Speed on the East Coast Main Line. p. 64.
- Boddy, Neve & Yeadon 1973, p. 125
- Boddy, Neve & Yeadon 1973, p. 126
- Fastest Steam Locomotive
- Day in pictures, 4 October 2012, BBC News
- Allen, Cecil J. (1949). The Locomotive Exchanges 1870 - 1948. Ian Allan Ltd. A comprehensive book on locomotive exchanges, giving details of each trial and the locomotives involved.
- Boddy, M.G.; Neve, E.; Yeadon, W.B. (April 1973). Fry, E.V., ed. Part 2A: Tender Engines - Classes A1 to A10. Locomotives of the L.N.E.R. Kenilworth: RCTS. ISBN 0-901115-25-8.
- Clarke, David (2005). Locomotives in Detail: 3 Gresley 4-6-2- A4 Class. Ian Allan Publishing. ISBN 0-7110-3085-5. An overall history of the Gresley A4 class, as well as unparalleled details about the class and individual members.
- Yeadon, W.B. (2001). Yeadon's Register of LNER Locomotives: Volume Two: Gresley A4 and W1 classes. Booklaw/Railbus is association with Challenger. ISBN 1-871608-15-5. Histories of the A4 and W1 classes of locomotive with details of repairs and liveries etc.
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LNER Class A4 4468 Mallard