SECR J class

The SECR J class was a class of 0-6-4T steam tank locomotive built for heavy freight service on the South Eastern and Chatham Railway, by Harry Wainwright.

SECR J class
J class 1598 at Ashford 1946
Type and origin
Power typeSteam
DesignerHarry Wainwright
BuilderAshford Works
Build date1913
Total produced5
Specifications
Configuration:
​
 • Whyte0-6-4T
 • UICC2′ h2t
Gauge4 ft 8 1⁄2 in (1,435 mm)
Driver dia.5 ft 6 in (1.676 m)
Trailing dia.3 ft 7 in (1.092 m)
Axle load18 long tons 14 cwt (41,900 lb or 19 t)
Adhesive weight51 long tons 18 cwt (116,300 lb or 52.7 t)
Loco weight70 long tons 14 cwt (158,400 lb or 71.8 t)
Fuel typeCoal
Fuel capacity3 long tons 5 cwt (7,300 lb or 3.3 t)
Water cap2,000 imp gal (9,100 l; 2,400 US gal)
Firebox:
 • Firegrate area		17.6 sq ft (1.64 m2)
Boiler pressure160 lbf/in2 (1.10 MPa)
Heating surface:
 • Tubes		593 sq ft (55.1 m2)
 • Flues294 sq ft (27.3 m2)
 • Firebox112 sq ft (10.4 m2)
Superheater:
​
 • TypeSchmidt
 • Heating area234 sq ft (21.7 m2)
CylindersTwo, inside
Cylinder size19 1⁄2 in × 26 in (495 mm × 660 mm)
Valve type8-inch (203 mm) piston valves
Performance figures
Tractive effort20,400 lbf (90.74 kN)
Career
Operators
ClassSECR / SR: J
Withdrawn1949–1951
DispositionAll scrapped

History

The South Eastern and Chatham Railway (SECR) had a need for versatile mixed traffic locomotives which could accelerate quickly so as not to impede the heavy passenger traffic on the densely used lines around London. Following the success of his C class 0-6-0 and his H class 0-4-4T Harry Wainwright sought to combine their good features but was limited by weight restrictions on many lines. The result was an 0-6-4 tank.[1] Five locomotives were constructed at Ashford during 1913, but Wainwright retired soon afterwards and no more were constructed. The class were moderately successful on a variety of secondary passenger and freight services. All had completed more than one million miles at the time of their withdrawal between 1949 and 1951.[2]

Numbering

The class were originally allocated unused numbers between 126 and 614. However, all but number 597 were renumbered by the Southern Railway in 1927/8 to create a unified sequence from A596 to A599. These later became 1596–1599, and then 31596–31599 under British Railways.

Locomotive Summary
J class locomotive fleet summary
SECR
No.		SR
No.		BR
No.		Date
Delivered		Date
Withdrawn
129A59631596October 1913September 1951
207A59531595October 1913April 1951
597A59731597November 1913October 1950
611A59831598November 1913December 1950
614A59831599December 1913November 1949

Sources
  1. Bradley 1980, p. 45.
  2. Bradley 1980, p. 48.
  • Bradley, D. L. (1980). The locomotive history of the South Eastern and Chatham Railway. London: Railway Correspondence and Travel Society. ISBN 0-901115-49-5.CS1 maint: ref=harv (link)
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