Caledonian Railway 812 and 652 Classes

'812' class No. 17596 at Corkerhill Locomotive Depot 15 August 1948

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	96

Specifications
Configuration	0-6-0
UIC class	Cn
Gauge	4 ft 8 ¹⁄₂ in (1,435 mm) standard gauge
Driver diameter	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)
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

Performance figures
Tractive effort	20,170 lbf (89.7 kN)

Career
Operators	CR • LMS • BR
Class	CR: 812 and 652
Power class	LMS/BR: 3F
Number in class	1 January 1923: 96 1 January 1948: 93
Withdrawn	1948–1963
Preserved	No. 828
Disposition	One 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.

Construction

96 locomotives were built, as follows:

Table of locomotives, 812 Class
Year	Quantity	CR Nos.	Builder	Builders No.	LMS Nos.	BR Nos.
1899	17	812–828	CR, St. Rollox		17550–17566	57550–57566
1899	10	829–838	Neilson, Reid & Co.	5613–5622	17567–17576	57567–57576
1900	10	839–848	Neilson, Reid & Co.	5623–5632	17577–17586	57577–57586
1900	15	849–863	Sharp Stewart	4633–4647	17587–17601	57587–57601
c.1900	15	864–878	Dübs & Co.	3880–3894	17602–17616	57602–57616
	12	282–293			17617–17628	57617–57628

Table of locomotives, 652 Class
Quantity	CR Nos.	LMS Nos.	BR Nos.
8	652–659	17629–17636	57629–57636
4	662–665	17637–17640	57637–57640
4	325–328	17641–17644	57641–57644
1	661	17645	57645

Seventeen were fitted with the Westinghouse air brakes for passenger train working, including the only surviving engine of the class, No. 828. All 96 passed to the London, Midland and Scottish Railway at the 1923 grouping. Only three, 17567, 17598 and 17610, had been withdrawn by the time of nationalisation in 1948. The last locomotive in service was not withdrawn until 1963.

Preservation

Locomotive 828 (LMS 17566, BR 57566) is the sole survivor of the class and is an important example of Scottish industrial heritage. It is currently in service at the Strathspey Railway.

In fiction

In The Railway Series children's books by the Rev. W. Awdry, the characters Donald and Douglas ("the Scottish twins"), are based on the Caledonian 812 class. They carried fictional numbers (57646 and 57647) before coming to Sodor. ^[1]

References

↑ "Donald and Douglas". (The real prototype locomotives that inspired the Rev W Awdry). The Real Lives of Thomas the Tank Engine. Retrieved 25 January 2011.

Casserley, H.C. & Johnston, Stuart W. (1974) [1966]. Locomotives at the Grouping 3: London, Midland and Scottish Railway. Shepperton, Surrey: Ian Allan. pp. 178–179. ISBN 0-7110-0554-0.

External links

Wikimedia Commons has media related to Caledonian Railway 812 class.

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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