The NER Class R was a class of 4-4-0

4-4-0

Under the Whyte notation for the classification of steam locomotives, 4-4-0 represents the wheel arrangement of four leading wheels on two axles , four powered and coupled driving wheels on two axles, and no trailing wheels...

 steam locomotive

Steam locomotive

A steam locomotive is a railway locomotive that produces its power through a steam engine. These locomotives are fueled by burning some combustible material, usually coal, wood or oil, to produce steam in a boiler, which drives the steam engine...

, designed by Wilson Worsdell

Wilson Worsdell

Wilson Worsdell was a British locomotive engineer who was locomotive superintendent of the North Eastern Railway from 1890 to 1910. He was the younger brother of T.W. Worsdell.-Family:...

 for the North Eastern Railway

North Eastern Railway (UK)

The North Eastern Railway , was an English railway company. It was incorporated in 1854, when four existing companies were combined, and was absorbed into the London and North Eastern Railway at the Grouping in 1923...

. They passed to the London and North Eastern Railway

London and North Eastern Railway

The London and North Eastern Railway was the second-largest of the "Big Four" railway companies created by the Railways Act 1921 in Britain...

 (LNER) in 1923. In 1936, some were rebuilt with long-travel piston valves and classified D20/2. The unrebuilt locomotives were re-classified D20/1.

Numbering

Forty-six D20/1 and three D20/2 locomotives passed to British Railways in 1948 and they were numbered 62340-62397 (with gaps).

External links

• Rail UK database, D20/1
• Rail UK database, D20/2
• http://www.lner.info/locos/D/d20.shtml