Caledonian Railway 55 Class

Class of 9 British 4-6-0 locomotives

Caledonian Railway 55 Class

| Type and origin

Power type| Steam
Designer| John F. McIntosh
Builder| St. Rollox
Build date| 1902-05
Total produced| 9
| Specifications

Configuration:
| ​
• Whyte| 4-6-0
Gauge| 4 ft 8+1⁄2 in (1,435 mm)
Driver dia.| 5 ft 0 in (1.52 m)[1]
Loco weight| 57.4 tons[1]
Tender weight| 37.3 tons[1]
Boiler pressure| 175psi[1]
Superheater| not superheated
Cylinders| two, inside
Cylinder size| 19 in × 26 in (483 mm × 660 mm)[1]
Valve gear| Stephenson
| Performance figures

Tractive effort| 23,300 lbf (104 kN)[1]
| Career

Operators| CR • LMS
Class| CR: 55
Power class| LMS: 3P

The Caledonian Railway 55 Class were 4-6-0 mixed-traffic locomotives designed by John F. McIntosh and built at the railway’s St. Rollox works in Glasgow in 1902-1905. The class was intended for use on the Callander and Oban line and were sometimes known as Oban Bogies, a nickname they shared with the earlier Brittain 179 Class 4-4-0s and the subsequent Pickersgill 191 Class 4-6-0s, all of which were built for use on the same route.

## Design[edit]

The Oban line had numerous short but steep gradients along with tight curves and lightly constructed bridges, and was therefore a challenging route to operate. McIntosh therefore designed a small 4-6-0 which was essentially an elongated hybrid of his 812 Class 0-6-0 and Dunalastair series 4-4-0 types.[2] The class featured a particularly short driving-wheel wheelbase to cope with the curvature of the line, and short tenders to enable the locomotives to fit onto the existing small turntable at Oban shed. The subsequent 918 Class was very similar to the 55 Class, but had a larger boiler and tender for express goods services on the mainline.

## Construction[edit]

The locomotives were built in two batches. Numbers 55-59 were built in 1902, whilst numbers 51-54 were built to a slightly modified design in 1905. Throughout their lives the locomotives were used primarily on the Oban line, although number 56 was on extended loan to the Highland Railway between 1916 and 1922.[3]

## LMS ownership[edit]

The locomotives passed to the LMS upon its formation in 1923, and were renumbered 14600-14608 (ex 55-59, 51-54).[4] The LMS rebuilt two locomotives (14606 and 14607) with larger boilers from withdrawn 918 Class engines in 1930.[5] All were withdrawn and scrapped between 1928 and 1937, having been displaced from the Oban line by former Highland Railway Clan Class 4-6-0s.

## Numbering and locomotive histories[edit]

CR no.  | LMS no.  | Delivered  | Withdrawn

|
|
|

55  | 14600  | 05/1902  | 09/1929
56  | 14601  | 05/1902  | ?
57  | 14602  | 05/1902  | 02/1928
58  | 14603  | 06/1902  | 10/1935
59  | 14604  | 06/1902  | 12/1936
51  | 14605  | 08/1905  | 02/1937
52  | 14606  | 09/1905  | 11/1937
53  | 14607  | 09/1905  | 10/1934
54  | 14608  | 09/1905  | 11/1935

source: BritishSteam[6]

## See also[edit]

* Locomotives of the Caledonian Railway

## References[edit]

1. ^ a b c d e f Atkins, C. P. (1976), The Scottish 4-6-0 Classes, Ian Allan, p.103
2. ^ Atkins, C. P. (1976), The Scottish 4-6-0 Classes, Ian Allan, p.45
3. ^ Atkins, C. P. (1976), The Scottish 4-6-0 Classes, Ian Allan, p.46
4. ^ Casserley, H. C. & Johnston, S. W. (1986), Locomotives at the Grouping 3: London Midland and Scottish, Ian Allan
5. ^ Essery, Bob & Jenkinson, David (1966), An illustrated History of L.M.S. Locomotives Volume Three: Absorbed Pre-Group Classes, Northern Division, Oxford Publishing Co.
6. ^ "BritishSteam locomotive information". BritishSteam.com. Archived from the original on 4 April 2013. Retrieved 19 March 2016.

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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
* 944
* 956

Miscellaneous|

* Highland Railway River Class

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