Highland Railway O Class
Highland Railway O class
| Type and origin |
|---|
| Power type |
Steam |
|---|
| Designer |
David Jones |
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| Builder |
HR Lochgorm Works |
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| Build date |
1878–1879 |
|---|
| Total produced |
3 |
|---|
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| Specifications |
|---|
| Configuration |
2-4-0T (rebuilt as 4-4-0T) |
|---|
| UIC class |
1′B t, rebuilt as 2′B t |
|---|
| Gauge |
4 ft 8 1⁄2 in (1,435 mm) |
|---|
| Leading dia. |
New: 3 ft 9 1⁄2 in (1.156 m)
Rebuilt: 2 ft 7 1⁄2 in (0.800 m) |
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| Driver dia. |
4 ft 9 in (1.448 m) |
|---|
| Loco weight |
New: 36 long tons 0 cwt (80,600 lb or 36.6 t)
Rebuilt: 44 long tons 0 cwt (98,600 lb or 44.7 t) |
|---|
| Boiler pressure |
140 lbf/in2 (0.97 MPa) |
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| Heating surface |
913 sq ft (84.8 m2) |
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| Cylinders |
Two, outside |
|---|
| Cylinder size |
16 in × 22 in (406 mm × 559 mm) |
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| Valve gear |
Allan |
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The Highland Railway O Class locomotives were built as 2-4-0T tank engines, but were soon rebuilt as 4-4-0Ts. They were designed by David Jones and three were built at the company's Lochgorm Works in 1878 and 1879.
Dimensions
They had 4-foot-9-inch (1,448 mm) coupled wheels, 16-by-22-inch (406 by 559 mm) outside cylinders and weight (in original condition) of 36 tons.
Numbering
Table of locomotives
| HR No. | Name | Date built | LMS No. | Withdrawn | Notes |
|---|
| 58 | Burghead | 000000001878-12-01-0000December 1878 | 15011 | 1928 | Name removed in 1900. Renumbered 58A in 1912 and 58B in 1920 |
| 59 | Highlander | 000000001879-06-01-0000June 1879 | 15010 | 1933 | Name removed in 1900. Renumbered 59A in 1912 and 59B in 1920 |
| 17 | Breadalbane | 000000001879-12-01-0000December 1879 | 15012 | 1929 | Renamed Aberfeldy in 1886; name removed in 1900. Renumbered 50 in 1901, 50A in 1912, 50B in 1920 |
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Rebuilding
They were rebuilt as 4-4-0Ts in 1881–82 due to trouble with the single leading axle.
Transfer to LMS
All three were still in service in 1923, although relegated to shunting duties, and they were transferred to the London, Midland and Scottish Railway (LMS) at the Grouping.
References
- Baxter, Bertram (1984). Baxter, David, ed. British Locomotive Catalogue 1825–1923, Volume 4: Scottish and remaining English Companies in the LMS Group. Ashbourne, Derbyshire: Moorland Publishing Company. p. 195.
- Casserley, H. C. & Johnston, Stuart W. (1974) [1966]. Locomotives at the Grouping 3: London, Midland and Scottish Railway. Shepperton, Surrey: Ian Allan. p. 153. ISBN 0-7110-0554-0.
- H. A. Vallance (1938) The Highland Railway