The SECR D class is a class of
4-4-0
4-4-0 is a locomotive type with a classification that uses the Whyte notation for the classification of steam locomotives by wheel arrangement and represents the arrangement: four leading wheels on two axles (usually in a leading bogie), four po ...
tender locomotives designed by
Harry Wainwright for the
South Eastern and Chatham Railway
The South Eastern and Chatham Railway Companies Joint Management Committee (SE&CRCJMC),Awdry (1990), page 199 known as the South Eastern and Chatham Railway (SE&CR), was a working union of two neighbouring rival railways, the South Easter ...
.
Overview
The construction of the initial 20 engines was shared between
Ashford railway works and the
Glasgow builder,
Sharp, Stewart and Company. The first of the class to enter service in 1901 was a Glasgow product, and by 1907 fifty-one were in traffic. Of these twenty-one were Ashford built while the rest were supplied by outside contractors.
The D class was a Harry Wainwright design and he was responsible for the overall look of the engine. The detail work was undertaken by Robert Surtees, his chief draughtsman at Ashford works.
D1 class

In 1913,
Richard Maunsell started the rebuilding of 21 D Class locomotives with
Belpaire fireboxes to produce the more powerful D1 class. These bigger engines were needed to cope with increasing loads on the
Kent Coast Line through Chatham.
Operation
Initially the D class was put to work on the Kent coast and Hastings services out of
London. By the 1930s the largest allocation of D class 4-4-0s was at Gillingham depot in
Kent but they had by now been reduced to secondary train duties and were now carrying the livery of the
Southern Railway.
At the outbreak of
World War II in 1939 some of the D class were placed into storage. Then in 1941 others were transferred to Nine Elms depot. A handful were based at Redhill on the
Reading-Tonbridge cross-country line.
In 1948
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 ...
inherited 28 of the Wainwright 4-4-0s. Their final years saw them concentrated at Guildford in
Surrey
Surrey () is a ceremonial and non-metropolitan county in South East England, bordering Greater London to the south west. Surrey has a large rural area, and several significant urban areas which form part of the Greater London Built-up Area. ...
and the last of the D class, No.31075, was withdrawn from there in 1956.
Preservation
One engine, No.31737, has been preserved and is in its original livery – that of the
South Eastern & Chatham Railway – at the
National Railway Museum in
York.
Models
Dapol, in association with Rails of Sheffield and Locomotion, released a model of the D Class in OO scale in 2021. On February 22, 2022, Dapol and Rails of Sheffield announced a further model of the D1 Class for release later that year.
References
*Herring, Peter (2000) ''Classic British Steam Locomotives'', Enderby: Abbeydale,
*
External links
NRM South Eastern & Chatham Railway steam locomotive No 737Rail UK database entry
{{DEFAULTSORT:Secr D Class
D
4-4-0 locomotives
Dübs locomotives
Sharp Stewart locomotives
Robert Stephenson and Company locomotives
Vulcan Foundry locomotives
Railway locomotives introduced in 1901
Standard gauge steam locomotives of Great Britain
Passenger locomotives