Caledonian Railway 670 Class

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 diameter 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Career Operators CR • LMS Class CR: 670 Power class LMS: Unclassified Withdrawn 1923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Nine locomotives were withdrawn in 1922, or earlier. Twenty-one survived into the ownership of the London, Midland and Scottish Railway (LMS) in 1923; these were withdrawn between 1923 and 1932.^[2]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

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.