Caledonian Railway 812 and 652 Classes

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Caledonian Railway 812 and 652 Classes
Corkerhill Locomotive Depot ex-Caledonian '812' class 0-6-0 geograph-2804468-by-Ben-Brooksbank.jpg
'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 classification Cn
Gauge 4 ft 8 12 in (1,435 mm)
Driver diameter 5 ft 0 in (1.52 m)
Length 56 ft 1 in (17.09 m)
Locomotive weight 45.65 long tons (46.38 t)
Boiler pressure 160 psi (1,100 kPa)
Superheater type 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
Operator(s) 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Withdrawn 1948–1963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[edit]

96 locomotives were built, as follows:

Table of locomotives, 812 Class
Year Quantity CR Nos. Builder Builders No. LMS Nos. BR Nos. Notes
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
Year Quantity CR Nos. Builder Builders No. LMS Nos. BR Nos. Notes
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 Only three, 17567, 17598 and 17610, had been withdrawn by the time of nationalisation in 1948. The last locomotive in service was not withdrawn until 1963.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[edit]

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[edit]

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[edit]

  1. ^ "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. 

See also[edit]

External links[edit]