LNER Class A3 2750 Papyrus

Last updated

Papyrus
Papyrus, the A3 that went 108MPH at King's Cross Station, 05 March 1935.jpg
Papyrus at King's Cross Station, 5 March 1935.
Type and origin
Power typeSteam
Designer Nigel Gresley
Builder Doncaster Works
Build dateMarch 1929
Specifications
Configuration:
​
 •  Whyte 4-6-2
Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge
Driver dia.80 in (2,032 mm)
Length70 ft (21.34 m)
Height13 ft (3.96 m)
Loco weight96.25 long tons (97.79  t; 107.80 short tons)
Cylinders 3
Performance figures
Tractive effort 32,910 lbf (146.39 kN)
Career
Operators
Class A3
Numbers
  • 2750 (1929–1945)
  • 96 (1946–1947)
  • 60096 (1948 -1963)
Official namePapyrus
WithdrawnSeptember 1963
DispositionScrapped

LNER Class A3 2750 Papyrus was a 4-6-2 "Pacific" steam locomotive built for the London and North Eastern Railway (LNER) at Doncaster Works to a design of Nigel Gresley, entering service in March 1929. Primarily used to haul express passenger trains on the East Coast Main Line by LNER and its successor, British Railways, it is notable for achieving what was at the time a world record-breaking speed for a steam locomotive of 108 mph on 5 March, 1935. [1] [2] A fictionalized account based on the locomotive's service history and speed record, 2750: Legend of a Locomotive by H.C. Webster, was published in 1953 and reprinted in 2016. [3]

Contents

History

The LNER Class A3 locomotives were first produced in 1927, as a development of the original Gresley Pacifics, the A1 Class introduced in 1922. [1] Early improvements in the design were identified and implemented as the result of trials and test runs occurring in 1924/25. They included improved valve gear and superheater design and increased boiler pressure. These developments resulted in greater tractive effort and higher fuel efficiency, thus enabling the locomotives to haul heavy loads over longer distances without refueling. The tenders were also redesigned, with a corridor to enable crews to change during a long run. [1]

Ultimately, the A3 class included both A1 locomotives rebuilt to A3 specifications and a further 27 locomotives built as such between 1927 and 1936. No. 2750 Papyrus was one of the latter, entering service in March 1929, with the propose of hauling long-distance express passenger trains on the East Coast Main Line. In common with many members of the class, Papyrus was named for a contemporary race horse. The locomotive remained in service with the LNER until nationalization of Britain's railways in 1948, and continued in service with British Railways (renumbered 60096) until September 1963, when it was withdrawn and subsequently scrapped. H.C. Webster's book 2750: Legend of a Locomotive [3] provides an account of the locomotive's service with the LNER, written from the perspective of the driver. The characters and dialog in the book are fictional, but it characterizes events and operations that appear to be broadly consistent with the known history of the locomotive.

Speed Record

British railway companies that operated main-line routes from London to Scotland had a history of competition to provide the fastest passenger service between these destinations, beginning in the late 1800s, with what became known as the Race to the North. Following the Railways Act 1921, many smaller companies were merged into groupings known as the 'Big Four', two of which operated the primary routes between London and Scotland: the London and North Eastern Railway (LNER) via the East Coast Main Line, and the London, Midland and Scottish (LMS) railway via the West Coast Main Line. Gresley's A1 and A3 class locomotives were assigned to the LNER's Flying Scotsman service, a daily non-stop express between London and Edinburgh, beginning in 1928. [4] To test the capabilities of these locomotives for maximum speed and sustained high-speed running, Papyrus was selected for a trial run that occurred on 5 March, 1935. [1] [2] During the trial, hauling a 217-ton load that included a dynamometer car to provide an accurate record of performance, Papyrus reached a peak speed of 108 miles per hour and maintained a speed above 100 mph for 12.5 consecutive miles on the southbound East Coast Main Line between Grantham and Peterborough. Subsequently, higher peak speeds were recorded for streamlined steam locomotives on Britain's railways, including the LNER Class A4 2509 Silver Link (112.5 mph, September 1935), the LMS Coronation Class 6220 Coronation (114 mph, June 1937) and the LNER Class A4 4468 Mallard (126 mph, July 1938, the current holder of the world speed record for a steam locomotive). However, Papyrus continues to hold world records for both peak speed and sustained high-speed running for a non-streamlined steam locomotive.

Models

Scale models of Gresley A3 Class locomotives are typically stylized as the Flying Scotsman, thereby representing the most famous and only surviving member of the class. [5] Only a few models of Papyrus have been manufactured to date. Dapol produced an N-gauge model in 2012. Hattons produced an O-gauge model in 2019. [6] [7]

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References

  1. 1 2 3 4 Nock, O.S. (1982). The Gresley Pacifics (Omnibus ed.). Book Club Associates, by arrangement with David & Charles Ltd., pp. 79-138.
  2. 1 2 "Railway Wonders of the World: 108 mph on the LNER" . Retrieved 30 October 2023.
  3. 1 2 Webster, H.C. (1953). 2750: Legend of a Locomotive. Thomas Nelson & Sons. Reprinted (2016) by John Broadley (ISBN 9780950701417).
  4. ↑ "Brighton Toy and Model Museum: Flying Scotsman (Train)" . Retrieved 31 October 2023.
  5. ↑ "The Flying Scotsman: World's most famous steam train returns home after 100 years" . Retrieved 30 October 2023.
  6. ↑ "Dapol ND129B Class A3 4-6-2 2750 'Papyrus' in LNER apple green". www.hattons.co.uk. Retrieved 4 November 2023.
  7. ↑ "Hattons Originals H7-A3-001 Class A3 4-6-2 2750 "Papyrus" in LNER Grass". www.hattons.co.uk. Retrieved 4 November 2023.
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