Caledonian Railway 670 Class

The Caledonian Railway 670 Class was a class of 0-4-2 steam locomotives designed by George Brittain for the Caledonian Railway (CR) and introduced in 1878. [1]

Caledonian Railway 670 Class
Type and origin
Power typeSteam
DesignerGeorge Brittain
Build date1878-1881
Total produced30
Specifications
Configuration:
​
 • Whyte0-4-2
Gauge4 ft 8+1⁄2 in (1,435 mm) standard gauge
Driver dia.5 ft 0 in (1.524 m)
Loco weight34.6 long tons (35.2 t; 38.8 short tons)†
36.95 long tons (37.54 t; 41.38 short tons)††
Boiler pressure140 psi (970 kPa)†
150 psi (1,000 kPa)††
CylindersTwo, outside
Cylinder size17 in × 24 in (432 mm × 610 mm)
Valve gearStephenson
Performance figures
Tractive effort13,756 lbf (61.19 kN)†
14,739 lbf (65.56 kN)††
Career
OperatorsCR • LMS
ClassCR: 670
Power classLMS: Unclassified
Withdrawn1923

Ownership changes

Nine locomotives were withdrawn in 1922, or earlier. Twenty-one survived into the ownership of the London, Midland and Scottish Railway (LMS) in 1923; these were withdrawn between 1923 and 1932.[2]

Numbering
CR nos. Quantity LMS nos. Notes
Various 7 17000-17006 †
Various 14 17007-17020 ††
Notes
  • † locos with140 psi pressure
  • †† locos with 150 psi pressure

References
  1. Casserley, H.C. and Johnston, S.W., Locomotives at the Grouping, No.3, London Midland and Scottish, Ian Allan, 1966, page 170
  2. Baxter, Bertram (1984). Baxter, David (ed.). British Locomotive Catalogue 1825-1923, volume 4: Scottish and remaining English Companies in the LMS Group. Ashbourne: Moorland Publishing. pp. 68–69.
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