Caledonian Railway 812 and 652 Classes

Type and origin
Type and origin
Power type	Steam
Designer	John F. McIntosh
Builder	CR St. Rollox Works; Dübs & Co. (15); Neilson, Reid & Co. (20); Sharp Stewart (15);
Build date	1899–1909
Total produced	79 (812) / 17 (652) / 96 (total)

Caledonian Railway 812 and 652 Classes
Caledonian Railway 812 and 652 Classes
	Ex-CR 812 class No. 17596 at Corkerhill Locomotive Depot on 15 August 1948
Power type
Type and origin
Power type	Steam
Designer	John F. McIntosh
Builder	CR St. Rollox Works; Dübs & Co. (15); Neilson, Reid & Co. (20); Sharp Stewart (15);
Build date	1899–1909
Total produced	79 (812) / 17 (652) / 96 (total)
Configuration:;
Specifications
Configuration:;
• Whyte	0-6-0
• UIC	Cn
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Driver dia.	5 ft 0 in (1.524 m)
Length	56 ft 2 in (17.12 m)
Loco weight	45.65 long tons (46.38 t; 51.13 short tons)
Water cap.	3,000 imp gal (14,000 L; 3,600 US gal)
Boiler pressure	160 psi (1,100 kPa)
Superheater	None
Cylinders	Two, inside
Cylinder size	18.5 in × 26 in (470 mm × 660 mm)
Valve gear	Stephenson
Valve type	Slide valves
Tractive effort
Performance figures
Tractive effort	20,170 lbf (89.7 kN)
Operators
Career
Operators	Caledonian Railway; London, Midland and Scottish Railway; British Railways;
Class	CR: 812 and 652
Power class	LMS/BR: 3F
Number in class	79 (812) 17 (652)
Numbers	CR: 282-293, 812-878 (812) 325-328, 652-659, 661-665 (652); LMS: 17550-17628 (812) 17629-17645 (652); BR: 57550-57628 (812) 57629-57645 (652);
Locale	Scottish Region
Withdrawn	1948–1963
Preserved	No. 828
Disposition	One 812 preserved, remainder scrapped

The Caledonian Railway 812 and 652 Classes were 0-6-0 steam tender locomotives designed by John F. McIntosh for the Caledonian Railway and introduced in 1899. They had the same boiler type as the 721 “Dunalastair” Class 4-4-0s. They could reach speeds of up to 55 mph (89 km/h).^[1]