Caledonian Railway 670 Class

Specifications
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

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

Caledonian Railway 670 Class
Caledonian Railway 670 Class
Power type
Type and origin
Power type	Steam
Designer	George Brittain
Build date	1878-1881
Total produced	30
Configuration:;
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
Tractive effort
Performance figures
Tractive effort	13,756 lbf (61.19 kN)†; 14,739 lbf (65.56 kN)††
Operators
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Withdrawn	1922-1932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.^[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Nine locomotives were withdrawn in 1922, or earlier. Twenty-one survived into the ownership of the London, Midland and Scottish Railway (LMS) in 1923; these were withdrawn between 1923 and 1932.^[2]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 with 140 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.

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[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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