The

Great Central Railway The Great Central Railway in England was formed when the Manchester, Sheffield and Lincolnshire Railway changed its name in 1897, anticipating the opening in 1899 of its London Extension. On 1 January 1923, the company was grouped into the ...

Class 9N, classified A5 by the

LNER LNER may refer to: * London and North Eastern Railway, a railway company in the United Kingdom from 1923 until 1947 * London North Eastern Railway, a train operating company in the United Kingdom since 2018 * Liquid neutral earthing resistor, a typ ...

, was a class of

4-6-2 Under the Whyte notation for the classification of steam locomotives, represents the wheel arrangement of four leading wheels on two axles, six powered and coupled driving wheels on three axles and two trailing wheels on one axle. The locomotiv ...

tank locomotive A tank locomotive or tank engine is a steam locomotive that carries its water in one or more on-board water tanks, instead of a more traditional tender. Most tank engines also have bunkers (or fuel tanks) to hold fuel; in a tender-tank locom ...

s designed by

John G. Robinson John George Robinson CBE, (30 July 1856 – 7 December 1943) was an English railway engineer, and was chief mechanical engineer of the Great Central Railway from 1900 to 1922. Early life Born at Newcastle upon Tyne, the second son of Matthew Robin ...

for suburban passenger services. They were fitted with

superheater A superheater is a device used to convert saturated steam or wet steam into superheated steam or dry steam. Superheated steam is used in steam turbines for electricity generation, steam engines, and in processes such as steam reforming. There ar ...

piston valve A "piston valve" is a device used to control the motion of a fluid along a tube or pipe by means of the linear motion of a piston within a chamber or cylinder. Examples of piston valves are: * The valves used in many brass instruments * The va ...

s and

Stephenson valve gear The Stephenson valve gear or Stephenson link or shifting link is a simple design of valve gear that was widely used throughout the world for various kinds of steam engines. It is named after Robert Stephenson but was invented by his employees. ...

Construction and numbering

The GCR built 21 locomotives at Gorton Works in three batches between 1911 and 1917. They ordered a fourth batch of ten from Gorton, but this was not built until after the

1923 Grouping The Railways Act 1921 (c. 55), also known as the Grouping Act, was an Act of Parliament enacted by the British government and intended to stem the losses being made by many of the country's 120 railway companies, by "grouping" them into four la ...

, under which GCR became part of the newly formed

London and North Eastern Railway The London and North Eastern Railway (LNER) was the second largest (after LMS) of the " Big Four" railway companies created by the Railways Act 1921 in Britain. It operated from 1 January 1923 until nationalisation on 1 January 1948. At th ...

(LNER). The LNER then ordered a fifth batch of 13 to a modified design, incorporating reduced boiler mountings and detail differences, and these were built by the outside contractors Hawthorn, Leslie & Co. during 1925–26 (works numbers 3616–28). No. 5447 was withdrawn in 1942 because its frames were badly cracked. In 1943, the remaining engines were allocated new numbers in the 9800–42 block, but these were not applied until 1946. Forty-three locomotives passed to

British Railways British Railways (BR), which from 1965 traded as British Rail, was a state-owned company that operated most of the overground rail transport in Great Britain from 1948 to 1997. It was formed from the nationalisation of the Big Four British rai ...

in 1948, and between 1948 and 1951 their numbers were increased by 60000. The class was divided into two parts in December 1948 as follows: * A5/1, 69800-69829: Built at Gorton to Robinson's design * A5/2, 69830-69842: Built by Hawthorn, Leslie with modifications by Gresley None have been preserved.

Modelling

A 7 mm scale kit is available from MSC models. Sonic Models have announced a ready-to-run OO scale model in GCR, LNER, and BR variants. They are expected to release in 2022.

References

External links

The Robinson A5 (GCR Class 9N) Pacific Tank Locomotives

Class A5/1 Details
at ''Rail UK''
Class A5/2 Details
at ''Rail UK'' 09N 4-6-2T locomotives Hawthorn Leslie and Company locomotives Railway locomotives introduced in 1911 Scrapped locomotives Standard gauge steam locomotives of Great Britain 2′C1′ h2t locomotives {{England-steam-loco-stub

Construction and numbering

Modelling

References

Further reading

External links