SECR D class

The SECR D class is a class of 4-4-0 tender locomotives designed by Harry Wainwright for the South Eastern and Chatham Railway.

SECR D class
The only preserved example seen in the great hall of the National Railway Museum
Type and origin
Power typeSteam
DesignerHarry Wainwright
Builder
Build date1901–1907
Total produced51
Specifications
Configuration:
​
 • Whyte4-4-0
 • UIC2′B n2
Gauge4 ft 8 1⁄2 in (1,435 mm)
Leading dia.3 ft 7 in (1.092 m)
Driver dia.6 ft 8 in (2.032 m)
Loco weight50 long tons 0 cwt (112,000 lb or 50.8 t)
Tender weight38 long tons 5 cwt (85,700 lb or 38.9 t)
Fuel typeCoal
Water cap3,300 imp gal (15,000 l; 4,000 US gal)
Firebox:
 • Firegrate area		20 1⁄4 sq ft (1.88 m2)
Boiler pressure175 lbf/in2 (1.21 MPa)
Heating surface1,505 sq ft (139.8 m2)
 • Tubes1,381 sq ft (128.3 m2)
 • Firebox124 sq ft (11.5 m2)
CylindersTwo, inside
Cylinder size19 in × 26 in (483 mm × 660 mm)
Performance figures
Tractive effort17,450 lbf (77.62 kN)
Career
Operators
ClassD
Power class
  • D: 1P
  • D1: 2P
LocaleSouthern Region
Withdrawn
  • D: 1944–1956
  • D1:1944–1961
Disposition21 rebuilt to D1 class (1921–25)
one preserved; remainder scrapped

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. Underneath the flowing curves and symmetry of the exterior lay a sure-footed machine that responded well to hard work.

D1 class
D1 31470 at Tonbridge 1958

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 inherited 28 of the Wainwright 4-4-0s. Their final years saw them concentrated at Guildford in Surrey and the last of the D class, No.31075, was withdrawn from there in 1956.

Table of withdrawals[1]
YearQuantity in
service at
start of year		Quantity
withdrawn		Locomotive numbersNotes
19445121742/471742 D class, 1747 D1 class
19474911726D class
195048231736/3831738 D class; 31736 D1 class
1951461131057/92, 31477/90, 31502, 31730–32/40/45/4831502 and 31745 D1 class, remainder D class
195335531501, 31728/33/44/50All D class
195430331493, 31729/46All D class
195527431496, 31586/91, 31734All D class
195623631075, 31488, 31549/74/77, 31737All D class
195917231470, 31741Both D1 class
196015531492/94, 51509, 31743/49All D1 class
1961101031145, 31246/47, 31487/89, 31505/45, 31727/35/39All D1 class

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.

References
  1. Bradley 1980, pp. 22, 112–113.
  • Herring, Peter (2000) Classic British Steam Locomotives, Enderby: Abbeydale, ISBN 1-86147-057-6
  • Bradley, D. L. (1980). The locomotive history of the South Eastern and Chatham Railway. Railway Correspondence and Travel Society. ISBN 0-901115 49 5.CS1 maint: ref=harv (link)
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