GNR 521 Class
Encyclopedia
The Great Northern Railway
521 Class was a class of 0-6-0
steam locomotive
s, introduced in 1911. They were designed by Henry Ivatt
for goods traffic. From 1912 to 1922 further examples, slightly modified by Nigel Gresley
, were built and designated 536 Class. The most obvious difference was in the front sandboxes
. These were below the running plate on the 521 but above it, and merged with the front splashers, on the 536. The London and North Eastern Railway
classified them both as J6. These locomotives had superheater
s and piston valves operated by Stephenson valve gear
.
Great Northern Railway (Great Britain)
The Great Northern Railway was a British railway company established by the Great Northern Railway Act of 1846. On 1 January 1923 the company lost its identity as a constituent of the newly formed London and North Eastern Railway....
521 Class was a class of 0-6-0
0-6-0
Under the Whyte notation for the classification of steam locomotives, 0-6-0 represents the wheel arrangement of no leading wheels, six powered and coupled driving wheels on three 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, introduced in 1911. They were designed by Henry Ivatt
Henry Ivatt
Henry Alfred Ivatt was the Chief Mechanical Engineer of the Great Northern Railway from 1896 to 1911.- Biography :...
for goods traffic. From 1912 to 1922 further examples, slightly modified by Nigel Gresley
Nigel Gresley
Sir Herbert Nigel Gresley was one of Britain's most famous steam locomotive engineers, who rose to become Chief Mechanical Engineer of the London and North Eastern Railway . He was the designer of some of the most famous steam locomotives in Britain, including the LNER Class A1 and LNER Class A4...
, were built and designated 536 Class. The most obvious difference was in the front sandboxes
Sandbox (railways)
A sandbox is a container on most locomotives and self propelled multiple units, or trams, that run on tramways and adhesion railways...
. These were below the running plate on the 521 but above it, and merged with the front splashers, on the 536. 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 them both as J6. These locomotives had superheater
Superheater
A superheater is a device used to convert saturated steam or wet steam into dry steam used for power generation or processes. There are three types of superheaters namely: radiant, convection, and separately fired...
s and piston valves operated by Stephenson valve gear
Stephenson valve gear
The Stephenson valve gear or Stephenson link or shifting link is a simple design of valve gear that was widely used throughout the world for all kinds of steam engine. It is named after Robert Stephenson but was actually invented by his employees....
.