Caledonian Railway 179 and 184 Classes

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Power typeSteam
Power typeSteam
BuilderSt. Rollox
Caledonian Railway 179 and 184 Classes
Type and origin
Power typeSteam
DesignerJohn F. McIntosh
BuilderSt. Rollox
Build date1913-15
Total produced11
Specifications
Configuration:
  Whyte4-6-0
Gauge4 ft 8+12 in (1,435 mm)
Driver dia.5 ft 9 in (1.75 m)[1]
Loco weight68.5 long tons (69.6 t; 76.7 short tons)[1]
Tender weight38 long tons (39 t; 43 short tons)[1]
Water cap.3,570 imp gal (16,200 L; 4,290 US gal)
Boiler pressure170 psi (1,200 kPa)[1]
SuperheaterRobinson[2]
CylindersTwo, inside
Cylinder size19.5 in × 26 in (495 mm × 660 mm)[1]
Valve gearStephenson
Performance figures
Tractive effort20,700 lbf (92 kN)[1]
Career
OperatorsCR  LMS
ClassCR: 179 and 184
Power classLMS: 3F
Number in class11
NumbersCR: 179-189
Withdrawn1934–1937, 1945, 1946

The Caledonian Railway 179 Class and 184 Class were 4-6-0 mixed-traffic locomotives[3] designed by John F. McIntosh and built in two batches in 1913–14 and 1914–15 respectively, at the Caledonian Railway's own St. Rollox Works. The differences between the two batches were minor, and they are often considered to be a single class.

They were the last new locomotives designed by McIntosh before his retirement. The type was essentially a superheated version of the earlier 908 Class and were built primarily for use on express goods trains, although they also worked on passenger traffic and were painted in the Caledonian's blue passenger livery. The locomotives were the most successful of McIntosh's various 4-6-0 designs.[4]

LMS ownership

The locomotives passed into the ownership of the London, Midland and Scottish Railway upon its formation in 1923. Although the older 908 Class were treated as passenger locomotives by the LMS, the 179s were classified as a freight type and were repainted into unlined black freight livery. They continued in use until they were displaced by new LMS standard locomotives such as the Black Five 4-6-0s.

Disposal

9 of the class were withdrawn and scrapped between 1934 and 1937, with the last to going in 1945 and 1946 respectively.

Numbering and locomotive histories

See also

References

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