Caledonian Railway 812 and 652 Classes

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:
 ​
 • 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)
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Withdrawn 1948–1963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. Notes
1899 17 812–828 CR, St. Rollox Y054 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
1899 12 282–293 CR, St. Rollox Y058 17617–17628 57617–57628
Table of locomotives, 652 Class
Year Quantity CR Nos. Builder Builders No. LMS Nos. BR Nos. Notes
1908 8 652–659 CR, St. Rollox Y087-Y086 17629–17636 57629–57636
1908 4 662–665 CR, St. Rollox Y086 17637–17640 57637–57640
1909 4 325–328 CR, St. Rollox Y086 17641–17644 57641–57644
1909 1 661 CR, St. Rollox Y086 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 Only three, 17567, 17598 and 17610, had been withdrawn by the time of nationalisation in 1948. The last locomotive in service was not withdrawn until 1963.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 on the Severn Valley Railway, 25 March 2012

Locomotive 828 (LMS 17566, BR 57566) is the sole survivor of the class and is an important example of Scottish industrial heritage. It is based at the Strathspey Railway. It was returned to regular service in March 2017.

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

  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

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