Highland Railway Loch or B class
Highland Railway 125 Loch Tay
Type and origin
Power typeSteam
DesignerDavid Jones
BuilderDübs & Co. (15)
North British Locomotive (3)
Serial numberDübs:3392–3406
NBL: 21456–21458
Build date1896 (15), 1917 (3)
Total produced18
Specifications
Configuration:
  Whyte4-4-0
  UIC2′B n2
Gauge4 ft 8+12 in (1,435 mm)
Leading dia.3 ft 3 in (0.991 m)
Driver dia.6 ft 3+12 in (1.918 m)
Loco weight54 long tons 10 cwt (122,100 lb or 55.4 t)
Water cap.3,000 imp gal (14,000 L; 3,600 US gal)
Boiler4 ft 4+78 in (1.34 m) diameter
Boiler pressure175 lbf/in2 (1.21 MPa)
Heating surface1,295 sq ft (120.3 m2)
CylindersTwo, outside
Cylinder size19 in × 24 in (483 mm × 610 mm)
Valve gearAllan
Valve typeNew: piston valves
Rebuilt: Balanced slide valves
Performance figures
Tractive effort17,070 lbf (75.93 kN)
Career
OperatorsHighland Railway
LMSBR
ClassHR: Loch; B (from 1901)
Power classLMS: 2P
Withdrawn1930–1950
DispositionAll scrapped

The Highland Railway Loch class locomotives were large 4-4-0s normally used north of Inverness. They were introduced in 1896, to the design of David Jones. Fifteen were built by Dübs and Company in Glasgow, all going into traffic between July and September 1896. Three more were built in 1917 by Dübs' successor, the North British Locomotive Company (NBL).

Design

They had the typical Jones appearance with outside cylinders, domed cab roof, louvred chimney, but, as with the Jones Goods class 4-6-0, the Allan style front framing was dispensed with. Allan valve gear was still used.

Numbering

Built by Dübs in 1896
HR numberNameLMS numberWithdrawnNotes
119Loch Insh143791948Name removed in 1944; reinstated in 1946. BR allocated number 54379 never carried
120Loch Ness143801940
121Loch Ericht143811940
122Loch Moy143821940
123Loch an Dorb143831934
124Loch Laggan143841938
125Loch Tay143851950BR allocated number 54385 never carried
126Loch Tummel143861938
127Loch Garry143871930
128Loch Luichart143881930
129Loch Maree143891931
130Loch Fannich143901937
131Loch Shin143911941
132Loch Naver143921947
133Loch Laoghal143931934Renamed Loch Laochal at unknown date
Built by NBL in 1917
HR numberNameLMS numberWithdrawnNotes
70Loch Ashie143941936
71Loch Garve143951935
72Loch Ruthven143961934

These were needed primarily for the increased traffic on the Kyle line where they were the heaviest locomotives permitted. This period was when the initial traffic of the United States effort in World War I was flowing, and much was brought to the west coast of Scotland in an effort to reduce the effect of the U-boat menace. The trains ran from Kyle to Invergordon so it was a wholly HR traffic.

Transfer to LMS

They passed to the London, Midland and Scottish Railway (LMS) in 1923. The LMS classified them '2P'. Withdrawal occurred from 1930 onwards.

Transfer to BR

Only two survived into British Railways (BR) ownership in 1948. Neither received their allocated BR number before being withdrawn in 1948 ('Loch Insh') and 1950 ('Loch Tay').

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. 194–195.
  • Casserley, H. C. & Johnston, Stuart W. (1974) [1966]. Locomotives at the Grouping 3: London, Midland and Scottish Railway. Shepperton, Surrey: Ian Allan. p. 141. ISBN 0-7110-0554-0.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.