Midland Railway 990 Class
Encyclopedia
The Midland Railway
990 class was a class of 4-4-0
steam locomotive
. Ten were built in 1908–1909 with simple expansion to compare with the 1000 class
compounds
, with which they shared many features. Initially saturated, they were later superheat
ed. They were withdrawn between 1925 and 1928. None has survived to preservation, though the first of the compounds has.
Midland Railway
The Midland Railway was a railway company in the United Kingdom from 1844 to 1922, when it became part of the London, Midland and Scottish Railway....
990 class 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...
. Ten were built in 1908–1909 with simple expansion to compare with the 1000 class
Midland Railway 1000 Class
Midland Railway 1000 Class is a class of 4-4-0 steam locomotive designed for passenger work.-Overview:These were developed from a series of five locomotives introduced in 1902 by Samuel W...
compounds
Compound locomotive
A compound engine unit is a type of steam engine where steam is expanded in two or more stages.A typical arrangement for a compound engine is that the steam is first expanded in a high-pressure cylinder, then having given up heat and losing pressure, it exhausts directly into one or more larger...
, with which they shared many features. Initially saturated, they were later superheat
Superheat
Superheat is a live album by Dutch alternative rock band The Gathering, released on 25 January 2000 by Century Media. The album was recorded at Paradiso, Amsterdam, Netherlands on 16 April 1999, with the exception of "Rescue Me" & "Strange Machines", which were recorded at 013, Tilburg, Netherlands...
ed. They were withdrawn between 1925 and 1928. None has survived to preservation, though the first of the compounds has.