Midland Railway 6 Class

The Midland Railway 6 Class was a class of ten 0-4-4T steam locomotives. They were built at Derby Works in 1875. A development of the earlier 0-4-4WT of the 690 and 780 classes, but being the first Johnson engines, had side tanks instead of back tanks.

Midland Railway 6 class
Type and origin
Power typeSteam
DesignerS. W. Johnson
BuilderDerby Works
Order number1
Build date1875
Total produced10
Specifications
Configuration:
​
 • Whyte0-4-4T
 • UICB2′ n2t
Gauge4 ft 8+1⁄2 in (1,435 mm)
Driver dia.5 ft 3 in (1.600 m)
Trailing dia.3 ft 0 in (0.914 m)
Wheelbase:
 • Engine
  • 8 feet 9 inches (2.667 m) +
  • 9 feet 9 inches (2.972 m) +
  • 5 feet 0 inches (1.524 m)
Loco weight43 long tons 6 cwt (44.0 t)
Fuel typeCoal
Boiler:
​
 • ModelMidland Railway Class C
 • Diameter4 ft 1 in (1.245 m)
 • Tube plates10 ft 6 in (3.200 m)
Boiler pressure160 lbf/in2 (1.10 MPa)
Heating surface1,254 sq ft (116.5 m2)
CylindersTwo, inside
Cylinder size17 in × 24 in (432 mm × 610 mm)
Career
Operators
Withdrawn1925–35

The original MR numbers were 6, 15, 18, 137, 140–144 and 147. The 1907 numbers were 1226–1235. All passed to the LMS in 1923, but they were all withdrawn and scrapped by 1935.

An abortive attempt was made to preserve the first of the class (No. 1226, which was withdrawn in 1930) and repainted back into its original livery and renumbered 6. However, new chief mechanical engineer William Stanier ordered it scrapped in 1932.

References
  1. Baxter 1982, p. 136.
  • Baxter, Bertram (1982). Baxter, David (ed.). British Locomotive Catalogue 1825–1923. Vol. 3A: Midland Railway and its constituent companies. Ashbourne, Derbyshire: Moorland Publishing Company. ISBN 9780903485524.
  • An Illustrated Review of Midland Locomotives Volume 3 - Tank Engines by R. J. Essery & D. Jenkinson ISBN 9780906867662
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