Misplaced Pages

This article relies largely or entirely on a single source. Relevant discussion may be found on the talk page. Please help improve this article by introducing citations to additional sources. Find sources: "NER Class F" – news · newspapers · books · scholar · JSTOR (December 2016)

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.

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.

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:

• Boiler pressure: 140, 160 or 175 psi
• Cylinders (compound): one 18 in × 24 in (460 mm × 610 mm) and one 26 in × 24 in (660 mm × 610 mm)
• Cylinders (simple): two 18 in × 24 in (460 mm × 610 mm)

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They were withdrawn between 1927 and 1935 and none were preserved.

References

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

• 4-4-0 locomotives
• North Eastern Railway locomotives
• Railway locomotives introduced in 1887
• Scrapped locomotives
• Standard gauge steam locomotives of Great Britain
• Passenger locomotives