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The Highland Railway Strath Class were 4-4-0 steam locomotives introduced in 1892, to the design of David Jones.

Highland Railway Strath or D class
Type and origin Power type Steam Designer David Jones Builder Neilson & Co. Serial number 4428–4438 Build date 1892 Total produced 12
Specifications Configuration: ​  • Whyte 4-4-0  • UIC 2′B n2 Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge Leading dia. 3 ft 9+1⁄2 in (1.156 m) Driver dia. 6 ft 3 in (1.905 m) Loco weight 45 long tons 0 cwt (100,800 lb or 45.7 t) Boiler 4 ft 6 in (1.37 m) diameter Boiler pressure 160 lbf/in2 (1.10 MPa) Heating surface 1,242 sq ft (115.4 m2) Cylinders Two, outside Cylinder size 18 in × 24 in (457 mm × 610 mm) Valve gear Stephenson
Performance figures Tractive effort 16,786 lbf (74.67 kN)
Career Operators Highland Railway → London, Midland & Scottish Class HR: Strath; D (from 1901) Power class LMS: 1P Number in class 1 January 1923: 6 Numbers HR: 89–100 LMS 14271–14276 Retired 1923–1930 Disposition All scrapped

Construction

Twelve were built by Neilson and Company and delivered between May and July 1892.

Design

They were identical to the class E Clyde Bogies apart from having boilers of a larger diameter which allowed an increased heating surface.

Numbering

Table of locomotives

HR No.	Name	LMS No.	Withdrawn	Notes
89	Sir George	14271	1930
90	Tweeddale	—	1923	Renamed Grandtully in 1897. Renumbered 90A in 1919
91	Strathspey	—	1923	Renumbered 91A in 1919
92	Strathdearn	14272	1930	Renamed Glendean at unknown date. Renumbered 92A in 1921
93	Strathnairn	—	1923	Renumbered 93A at unknown date.
94	Strathtay	14273	1924	LMS number never applied
95	Strathcarron	14274	1930
96	Glentilt	—	1923	Renumbered 96A in 1922
97	Glenmore	—	1923	Renumbered 97A in 1922
98	Glentruim	14275	1930
99	Glentromie	—	1923	Renumbered 99A in 1922
100	Glenbruar	14276	1930

Transfer to LMS

Half of the class survived to be taken over by the London, Midland and Scottish Railway (LMS) at the 1923 Grouping but the last was withdrawn in 1930.

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. pp. 193–194.
• Casserley, H. C. & Johnston, Stuart W. (1974) [1966]. Locomotives at the Grouping 3: London, Midland and Scottish Railway. Shepperton, Surrey: Ian Allan. p. 136. ISBN 0-7110-0554-0.

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