The NER Class T was a class of 0-8-0

0-8-0

Under the Whyte notation for the classification of steam locomotives, 0-8-0 represents the wheel arrangement of no leading wheels, eight powered and coupled driving wheels on four 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...

s of 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...

 Ian Allan ABC of British Railways Locomotives, 1948 edition, part 4, pp 24-25 .

Sub-classes

There were two NER sub-classes. Class T had piston valves, while class T1 had slide valves

D slide valve

The slide valve is a rectilinear valve used to control the admission of steam into, and emission of exhaust from, the cylinder of a steam engine.-Use:...

. 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...

classified both types as Q5.

Between 1932 and 1934, the LNER rebuilt fourteen Q5s with larger boilers and these were given the sub-class Q5/2. The unrebuilt locomotives were re-classifed Q5/1.