Highland Railway F Class

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.

Highland Railway F class
Type and origin
Power typeSteam
DesignerDavid Jones
BuilderDübs & Co. (10)
HR Lochgorm Works (7)
Serial numberDübs: 714–723
Build date1874 (10), 1876–1888 (7)
Total produced17
Specifications
Configuration:
​
 • Whyte4-4-0
 • UIC2′B n2
Gauge4 ft 8+1⁄2 in (1,435 mm)
Leading dia.3 ft 3+1⁄2 in (1.003 m)
Driver dia.6 ft 3+1⁄2 in (1.918 m)
Loco weight41 long tons 0 cwt (91,800 lb or 41.7 t)
Water cap.1,800 imp gal (8,200 L; 2,200 US gal)
Boiler4 ft 2 in (1.27 m) diameter
Boiler pressure140–150 lbf/in2 (0.97–1.03 MPa)
Heating surface1,228 sq ft (114.1 m2)
CylindersTwo, outside
Cylinder size18 in × 24 in (457 mm × 610 mm)
Valve gearAllan
Career
OperatorsHighland Railway
London, Midland & Scottish
ClassHR: Duke; F (from 1901)
NumbersHR: 60–69, 4 (→ 31), 71–75, 84
Withdrawn1907-1923
DispositionAll scrapped

Dimensions

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

Withdrawal commenced in 1907, and by 1909 all-but-one of the Dübs-built examples had been withdrawn.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
Table of locomotives
HR
No.		First
name		ManufacturerSerial
No.		Date
new		Date
withdrawn		Notes
60BruceDübs & Co.714June 18741909Renamed Sutherland in 1884
61SutherlandshireDübs & Co.715June 18741907Renamed Duke in 1877
62PerthshireDübs & Co.716June 18741909Renamed Stemster in 1889, Huntingtower in 1899, and Aultwherrie in 1903
63Inverness-shireDübs & Co.717July 18741907Renamed Inverness
64MorayshireDübs & Co.718July 18741909Renamed Seafield c. 1889
65NairnshireDübs & Co.719July 18741909Renamed Dalraddy
66Ross-shireDübs & Co.720July 18741907Renamed Ardvuela
67The DukeDübs & Co.721August 18741923Renamed Cromartie in 1877. Renumbered 67A in 1918, 70A in 1923.
68Caithness-shireDübs & Co.722August 18741907Renamed Caithness, then Muirtown
69The Lord ProvostDübs & Co.723August 18741909Renamed Sir James, then Aldourie
4ArdrossLochgorm—July 18761913Renamed Auchtertyre in 1901. Renumbered 31 in 1899, and 31A in 1911.
71ClachnacuddinLochgorm—December 18831915Renumbered 71A in 1912
72BruceLochgorm—June 18841923Renamed Grange c. 1886. Renumbered 72A in 1915
73ThurlowLochgorm—February 18851923Name removed at unknown date; renamed Rosehaugh in 1898. Renumbered 73A in 1916
74BeaufortLochgorm—September 18851913Name removed at unknown date
75BreadalbaneLochgorm—October 18861923Renumbered 75A in 1917
84DochfourLochgorm—December 18881923Renumbered 84A in 1917

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. 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
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