NER Class F

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NER Class F
LNER Class D22
Type and origin
Power typeSteam
DesignerNER Class R1
Build date1887-1891
Total produced37
Specifications
Configuration:
   Whyte 4-4-0
Gauge 4 ft 8+12 in (1,435 mm)
Leading dia. 3 ft 7+14 in (1.099 m)
Driver dia.6 ft 8 in (2.03 m)
Fuel typecoal
Boiler4 ft 6 in (1.37 m) diameter
Boiler pressure160 psi (1.1 MPa)
Cylinders two inside
Cylinder size 18 in × 24 in (460 mm × 610 mm)
Valve gear Stephenson
Performance figures
Tractive effort 13,210 lbf (58.8 kN)
Career
Operators North Eastern Railway
London and North Eastern Railway
DispositionNone preserved

The NER Class F (LNER Class D22) 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.

Contents

History

Class F (compound expansion) and Class F1 (simple expansion) 4-4-0s were developments of T.W. Worsdell's experimental Class D 2-4-0. The Class Ds were two-cylinder compounds of the von Borries type. However, the 2-4-0 wheel arrangement was found unsuitable and this led to the development of the Class F 4–4–0. [1]

ClassBuild dateNo. built
D1886, 18882
F188710
F1188710
F1890–189115
Total37

Between 1896 and 1911 all the Class D, F and F1 locomotives were rebuilt into one 4-4-0 class with 18in x 24in simple expansion cylinders, piston valves, and Stephenson valve gear. They had been built with slide valves and Joy valve gear. The combined class was designated "Class F" from 1914. Superheaters were fitted between 1913 and 1920.

Dimensions

The information box (above right) shows the dimensions after 1911. Before this, dimensions varied:

Use

They were initially used for express passenger services. Between 1892 and 1894 they were displaced by newer locomotives and relegated to secondary duties. By the time of the 1923 Grouping, they had been further relegated and were typically used for branch line stopping trains.

Withdrawal

They were withdrawn between 1927 and 1935 and none were preserved.

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References

  1. "The T.W.Worsdell Class D22 (NER Class F) 4-4-0 Locomotives". LNER Encyclopedia.