Caledonian Railway 670 Class

Type and origin
Power type	Steam
Designer	George Brittain
Build date	1878-1881
Total produced	30

Specifications
Configuration	0-4-2
Gauge	4 ft 8 ¹⁄₂ in (1,435 mm) standard gauge
Driver dia.	5 ft 0 in (1.524 m)
Loco weight	34.6 long tons (35.2 t; 38.8 short tons)† 36.95 long tons (37.54 t; 41.38 short tons)††
Boiler pressure	140 psi (970 kPa)† 150 psi (1,000 kPa)††
Cylinders	Two, outside
Cylinder size	17 in × 24 in (432 mm × 610 mm)
Valve gear	Stephenson

Performance figures
Tractive effort	13,756 lbf (61.19 kN)† 14,739 lbf (65.56 kN)††

Career
Operators	CR • LMS
Class	CR: 670
Power class	LMS: Unclassified
Withdrawn	1923

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]

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Nine locomotives were withdrawn in 1922, or earlier. Twenty-one survived into the ownership of the London, Midland and Scottish Railway (LMS) in 1923; these were withdrawn between 1923 and 1932.^[2]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

↑ Casserley, H.C. and Johnston, S.W., Locomotives at the Grouping, No.3, London Midland and Scottish, Ian Allan, 1966, page 170
↑ 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.

Caledonian Railway locomotives

Robert Sinclair (1847–1856)	59 (2-2-2) 96 101 111

Benjamin Connor (1856–1876)	59 (2-4-0) 552 600

George Brittain (1876–1882)	1 130 140 152 179 485 486 670

Dugald Drummond (1882–1890)	66 80 123 124 171 262 264 272 294 323

Hugh Smellie (1890)	Appointed 1 September 1890. Died 19 April 1891

John Lambie (1891–1895)	1 13 19 211 538A

John F. McIntosh (1895–1914)	29 43 49 55 92 139 140 179 184 439 498 611 652 711 721 766 782 812 879 900 903

William Pickersgill (1914–1923)	60 72 113 159 191 300 431 956

Miscellaneous	Highland Railway River Class

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