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NER Class G
LNER Class D23
Type and origin
Power typeSteam
DesignerThomas William Worsdell
BuilderNER Darlington Works
Build date1887-1888
Total produced20
Specifications
Configuration:
​
 • Whyte4-4-0
Gauge4 ft 8+1⁄2 in (1,435 mm)
Leading dia.3 ft 1+1⁄4 in (0.946 m)
Driver dia.6 ft 1+1⁄4 in (1.861 m)
Fuel typecoal
Boiler4 ft 3 in (1.30 m) diameter
Boiler pressure160 psi (1.1 MPa)
Cylinderstwo inside
Cylinder size18 in × 24 in (460 mm × 610 mm)
Valve gearStephenson
Performance figures
Tractive effort14,437 lbf (64.22 kN)
Career
OperatorsNorth Eastern Railway
London and North Eastern Railway
DispositionNone preserved

The NER Class G (LNER Class D23) was a class of 4-4-0 steam locomotives of the North Eastern Railway. It was designed by Thomas William Worsdell and introduced in 1887.

History

The engines were built as Class G1 2-4-0s. They had simple expansion cylinders, slide valves, and Joy valve gear. Twenty locomotives were built at Darlington Works in 1887-1888. They were initially classed as "G1" to leave the classification "G" available for a compound version. However, the compound version was not built and they were reclassified as "G" in 1914.[1]

Modifications

Between 1900 and 1904, they were rebuilt as 4-4-0s. At the same time, they were fitted with piston valves and Stephenson valve gear. Superheaters were fitted between 1913 and 1916.

Use

The engines were initially used for secondary passenger duties. By the time of the 1923 Grouping, they were working local passenger services.

Withdrawal

Withdrawals took place between 1929 and 1935 and none were preserved.

References

  1. ^ "The T.W.Worsdell Class D23 (NER Class G) 4-4-0 Locomotives". LNER Encyclopedia.
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