Highland Railway X Class

HR X class
Type and origin
Power typeSteam
DesignerPeter Drummond
BuilderNorth British Locomotive Company
Serial number18805–18808, 19013–19016
Build date1909–1911
Total produced8
Specifications
Configuration:
​
 • Whyte0-6-4T
 • UICC2′ n2t
Gauge4 ft 8+1⁄2 in (1,435 mm) standard gauge
Driver dia.5 ft 0 in (1.524 m)
Trailing dia.3 ft 3 in (0.991 m)
Loco weight69.0 long tons (70.1 t; 77.3 short tons)
Fuel typeCoal
Fuel capacity4.5 long tons (4.6 t; 5.0 short tons)
Water cap.1,970 imp gal (9,000 L; 2,370 US gal)
Firebox:​
 • Grate area22.5 sq ft (2.09 m2)
Boiler4 ft 6+1⁄4 in (1.38 m)
Boiler pressure180 lbf/in2 (1.24 MPa)
Heating surface:​
 • Firebox120 sq ft (11 m2)
 • Tubes1,148 sq ft (106.7 m2)
 • Total surface1,268 sq ft (117.8 m2)
CylindersTwo, inside
Cylinder size18+1⁄2 in × 26 in (470 mm × 660 mm)
Performance figures
Tractive effort22,082 lbf (98.23 kN)
Career
OperatorsHR → LMS
ClassHR: X
Power classLMS: 4P
Withdrawn1932–1936
DispositionAll scrapped

The Highland Railway Drummond 0-6-4T or X class were large tank engines designed by Peter Drummond, originally intended for banking duty.

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 the Class K 0-6-0 tender engines and leading dimensions were very similar, although the boiler and firebox are recorded as 'larger' by an unspecified amount.

Reputation

They were not popular with crews, many finding them heavy and clumsy and several having problems with water capacity. Their axleboxes also consistently ran hot as well.

Numbering

HR No. Built LMS No. Withdrawn Notes
39 1909 15300 December 1936
64 1909 15301 October 1934 Renumbered 66 in 1909
65 1909 15302 August 1933 Renumbered 68 in 1909
69 1909 15303 October 1932
29 1911 15304 October 1932 Renumbered 43 in 1913
31 1911 15305 November 1934
42 1911 15306 November 1935
44 1911 15307 November 1934

Transfer to LMS

All entered London, Midland and Scottish Railway (LMS) ownership in 1923 and were renumbered 15300–7 with the power classification 4; this was revised to 4P in 1928. Six locomotives (LMS nos. 15300–3/5/7) received the LMS red livery but were later repainted black; the other two (LMS nos. 15304/6) went directly from HR green to LMS black. Withdrawal commenced in 1932, and was completed in 1936.[1]

References

  1. ^ Cormack, J.R.H.; Stevenson, J.L. (1990). Greenwood, William (ed.). Highland Railway Locomotives Book 2: The Drummond, Smith & Cumming Classes. Locomotives of the LMS. Lincoln: RCTS. pp. 88, 90, 94. ISBN 0-901115-72-X.
  • Baxter, Bertram (1984). Baxter, David (ed.). British Locomotive Catalogue 1825–1923. Vol. 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.
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