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: ​  • Whyte 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Career Operators CR • LMS Class CR: 670 Power class LMS: Unclassified Withdrawn 1922-1932 Disposition All scrapped

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.

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Nine locomotives were withdrawn in 1922, or earlier. Twenty-one survived into the ownership of the London, Midland and Scottish Railway (LMS) in 1923; these were withdrawn between 1923 and 1932.

Numbering

CR nos.	Quantity	LMS nos.	Notes
Various	7	17000-17006	†
Various	14	17007-17020	††

Notes

• † locos with 140 psi pressure
• †† locos with 150 psi pressure