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Highland Railway Cumming 4-4-0 Class

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Highland Railway Cumming 4-4-0
Type and origin
Power typeSteam
DesignerChristopher Cumming
BuilderHawthorn Leslie
Serial number3172–3173
Build date1916
Total produced2
Specifications
Configuration:
 • Whyte4-4-0
 • UIC2′B
Gauge4 ft 8+12 in (1,435 mm)
Leading dia.3 ft 3 in (0.991 m)
Driver dia.6 ft 3 in (1.905 m)
Loco weight54 long tons 19+12 cwt (125,400 lb or 56.9 t)
Fuel typeCoal
Boiler4 ft 8+916 in (1.44 m) diameter
Boiler pressure175 psi (1.21 MPa)
Heating surface1,140 sq ft (106 m2)
Superheater:
 • TypeRobinson
 • Heating area180 sq ft (17 m2)
CylindersTwo, outside
Cylinder size20 in × 26 in (508 mm × 660 mm)
Valve gearWalschaerts
Valve typeInside admission piston valves
Train brakesVacuum
Performance figures
Tractive effort20,627 lbf (91.8 kN)
Career
OperatorsHR, LMS
Power classLMS: 3P
NumbersHR: 73–74,
LMS: 14522–14523
Withdrawn1935–1936
DispositionBoth scrapped

The Highland Railway Cumming 4-4-0 class was a pair of 4-4-0 steam locomotives designed by Christopher Cumming, the Locomotive Superintendent of the Highland Railway

Dimensions

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They had 20-by-26-inch (510 mm × 660 mm) outside cylinders with Walschaerts valve gear, 6 ft 3 in (1.905 m) driving wheels and a boiler pressed to 175 lbf/in2 (1.21 MPa). Weight was a half-hundredweight short of 56 long tons (125,400 lb or 56.9 t).

Numbering

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Table of engines
HR No. Name LMS No. Withdrawn Notes
73 Snaigow 14522 April 1936
74 Durn 14523 April 1935

Transfer to LMS

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Both survived into London, Midland and Scottish Railway ownership in 1923, but neither lasted until nationalisation, as both were withdrawn and scrapped as non-standard engines in the mid-1930s. The LMS had classed them as 3P.

References

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  • 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.
  • Casserley, H. C. & Johnston, Stuart W. (1974) [1966]. Locomotives at the Grouping 3: London, Midland and Scottish Railway. Shepperton, Surrey: Ian Allan. p. 146. ISBN 0-7110-0554-0.