Highland Railway X Class
HR X class|
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| Specifications |
|---|
| Configuration |
0-6-4T |
|---|
| UIC class |
C2′ n2t |
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| Gauge |
4 ft 8 1⁄2 in (1,435 mm) standard gauge |
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| Driver dia. |
5 ft 0 in (1.524 m) |
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| Trailing dia. |
3 ft 3 in (0.991 m) |
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| Loco weight |
69.0 long tons (70.1 t; 77.3 short tons) |
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| Fuel type |
Coal |
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| Fuel capacity |
4.5 long tons (4.6 t; 5.0 short tons) |
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| Water cap |
1,970 imp gal (9,000 l; 2,370 US gal) |
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Firebox:
• Firegrate area |
22.5 sq ft (2.09 m2) |
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| Boiler |
4 ft 6 1⁄4 in (1.38 m) |
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| Boiler pressure |
180 lbf/in2 (1.24 MPa) |
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| Heating surface |
1,268 sq ft (117.8 m2) |
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| • Tubes |
1,148 sq ft (106.7 m2) |
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| • Firebox |
120 sq ft (11 m2) |
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| Cylinders |
Two, inside |
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| Cylinder size |
18 1⁄2 in × 26 in (470 mm × 660 mm) |
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|
|
|
| Career |
|---|
| Operators |
HR → LMS |
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| Class |
HR: X |
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| Power class |
LMS: 4P |
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| Withdrawn |
1932–1936 |
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| Disposition |
All scrapped |
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The Highland Railway Drummond 0-6-4T or X class were large tank engines originally intended for banking duty. They were designed by Peter Drummond.
Construction
The first four were built by the North British Locomotive Company and delivered in 1909. A second batch of four was delivered in 1911.
Design
The design was derived from that of the class K (0-6-0) tender engines and leading dimensions were very similar although the boiler and firebox are recorded as being 'larger' but by an unspecified amount.
Reputation
They were not popular with their crews, many thought them heavy and clumsy, and several crews had problems with water capacity. It seems their axleboxes were not well-proportioned either as there are reports of consistent hot box problems.
Numbering
| HR No. | Built | LMS No. | Withdrawn | Notes |
|---|
| 39 | 1909 | 15300 | 000000001936-12-01-0000December 1936 | |
| 64 | 1909 | 15301 | 000000001934-10-01-0000October 1934 | Renumbered 66 in 1909 |
| 65 | 1909 | 15302 | 000000001933-08-01-0000August 1933 | Renumbered 68 in 1909 |
| 69 | 1909 | 15303 | 000000001932-10-01-0000October 1932 | |
| 29 | 1911 | 15304 | 000000001932-10-01-0000October 1932 | Renumbered 43 in 1913 |
| 31 | 1911 | 15305 | 000000001934-11-01-0000November 1934 | |
| 42 | 1911 | 15306 | 000000001935-11-01-0000November 1935 | |
| 44 | 1911 | 15307 | 000000001934-11-01-0000November 1934 | |
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Transfer to LMS
They all survived to be taken over by the London, Midland and Scottish Railway (LMS) at the 1923 Grouping. The last was withdrawn in 1936.
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. 200.
- Haresnape, Brian; Rowledge, Peter (1982). Drummond Locomotives, a pictorial history. Shepperton, Surrey: Ian Allan Limited. ISBN 0-7110-1206-7.