NER Class F


The NER Class F 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

Class F and Class F1 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.
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 shows the dimensions after 1911. Before this, dimensions varied:
  • Boiler pressure: 140, 160 or 175 psi
  • Cylinders : one and one
  • Cylinders : two

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They were withdrawn between 1927 and 1935 and none were preserved.