Highland Railway F Class

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Highland Railway F class
Type and origin
Power type Steam
Designer David Jones
Builder Dübs & Co. (10)
HR Lochgorm Works (7)
Serial number Dübs: 714–723
Build date 1874 (10), 1876–1888 (7)
Total produced 17
Specifications
Configuration 4-4-0
UIC class 2′B n2
Gauge 4 ft 8 12 in (1,435 mm)
Leading dia. 3 ft 3 12 in (1.003 m)
Driver dia. 6 ft 3 12 in (1.918 m)
Loco weight 41 long tons 0 cwt (91,800 lb or 41.7 t)
Water cap 1,800 imp gal (8,200 l; 2,200 US gal)
Boiler 4 ft 2 in (1.27 m) diameter
Boiler pressure 140–150 lbf/in2 (0.97–1.03 MPa)
Heating surface 1,228 sq ft (114.1 m2)
Cylinders Two, outside
Cylinder size 18 in × 24 in (457 mm × 610 mm)
Valve gear Allan
Career
Operators Highland Railway
London, Midland & Scottish
Class HR: Duke; F (from 1901)
Numbers HR: 60–69, 4 (→ 31), 71–75, 84
Disposition All scrapped

The Highland Railway F class 4-4-0s were a class of British steam locomotives introduced in 1874. The first 10 were built by Dübs and Company in 1874. A further seven were built in Lochgorm works between 1876 and 1888. Originally they were the first Bruce class, and later became known as the Duke class to avoid confusion with the second Bruce class. As part of Peter Drummond’s 1901 classification scheme they became class F.

Dimensions[edit]

They featured 6-feet 3½-inch driving wheels and weighed 41 long tons (42 t; 46 short tons). The original batch had boilers pressed to 140 pounds-force per square inch (970 kPa), the later batch had slightly smaller boilers but a higher pressure of 150 lbf/in2 (1,030 kPa). Of typical Allan/Jones appearance, they had outside cylinders of 18 by 24 inches (457 by 610 mm).

Disposal[edit]

Withdrawal commenced in 1907, and by 1909 all-but-one of the Dübs-built examples had been withdrawn. Numbers 31A and 74 were retired in 1913, number 71A was broken up in 1915. The remaining five survived until 1923 but none of them acquired a new London, Midland and Scottish Railway number.

Numbering[edit]

Table of locomotives
HR
No.
First
name
Manufacturer Serial
No.
Date
new
Date
withdrawn
Notes
60 Bruce Dübs & Co. 714 June 1874 1909 Renamed Sutherland in 1884
61 Sutherlandshire Dübs & Co. 715 June 1874 1907 Renamed Duke in 1877
62 Perthshire Dübs & Co. 716 June 1874 1909 Renamed Stemster in 1889, Huntingtower in 1899, and Aultwherrie in 1903
63 Inverness-shire Dübs & Co. 717 July 1874 1907 Renamed Inverness
64 Morayshire Dübs & Co. 718 July 1874 1909 Renamed Seafield c. 1889
65 Nairnshire Dübs & Co. 719 July 1874 1909 Renamed Dalraddy
66 Ross-shire Dübs & Co. 720 July 1874 1907 Renamed Ardvuela
67 The Duke Dübs & Co. 721 August 1874 1923 Renamed Cromartie in 1877. Renumberd 67A in 1918, 70A in 1923.
68 Caithness-shire Dübs & Co. 722 August 1874 1907 Renamed Caithness, then Muirtown
69 The Lord Provost Dübs & Co. 723 August 1874 1909 Renamed Sir James, then Aldourie
4 Ardross Lochgorm July 1876 1913 Renamed Auchtertyre in 1901. Renumbered 31 in 1899, and 31A in 1911.
71 Clachnacuddin Lochgorm December 1883 1915 Renumbered 71A in 1912
72 Bruce Lochgorm June 1884 1923 Renamed Grange c. 1886. Renumbered 72A in 1915
73 Thurlow Lochgorm February 1885 1923 Name removed at unknown date; renamed Rosehaugh in 1898. Renumberd 73A in 1916
74 Beaufort Lochgorm September 1885 1913 Name removed at unknown date
75 Breadalbane Lochgorm October 1886 1923 Renumbered 75A in 1917
84 Dochfour Lochgorm December 1888 1923 Renubered 84A in 1917

References[edit]

  • 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. 191–192. 
  • Casserley, H. C. & Johnston, Stuart W. (1974) [1966]. Locomotives at the Grouping 3: London, Midland and Scottish Railway. Shepperton, Surrey: Ian Allan. ISBN 0-7110-0554-0. 
  • H. A. Vallance (1938) The Highland Railway