LMS Compound 4-4-0
Encyclopedia
The London, Midland and Scottish Railway
Compound 4-4-0 was a class of steam locomotive
designed for passenger work.
1000 Class
, to which they were almost identical. The most obvious difference is that the driving wheel diameter was reduced from 7' 0" on the Midland locomotive to 6' 9" on the LMS version.
They were given the power classification 4P.
The LMS continued the Midland numbering from 1045 to 1199 and then started in the lower block of 900–39. After nationalisation in 1948, BR added 40000 to their numbers so they became 40900–39 and 41045–199.
None has survived to preservation, though the first of the Midland 1000 Class engines has.
For terminology, see Steam locomotive components
London, Midland and Scottish Railway
The London Midland and Scottish Railway was a British railway company. It was formed on 1 January 1923 under the Railways Act of 1921, which required the grouping of over 120 separate railway companies into just four...
Compound 4-4-0 was a class of 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 for passenger work.
Overview
One hundred and ninety five engines were built by the LMS, adding to the 45 Midland RailwayMidland 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....
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...
, to which they were almost identical. The most obvious difference is that the driving wheel diameter was reduced from 7' 0" on the Midland locomotive to 6' 9" on the LMS version.
They were given the power classification 4P.
The LMS continued the Midland numbering from 1045 to 1199 and then started in the lower block of 900–39. After nationalisation in 1948, BR added 40000 to their numbers so they became 40900–39 and 41045–199.
None has survived to preservation, though the first of the Midland 1000 Class engines has.
Dimensions
- LMS/BR Power classification, 4P
- Locomotive weight, 61 tons 14 cwt
- Boiler pressure, 200 psi
- Superheater, Yes
- Cylinders:
- One high pressure, 19"x26" (piston valves)
- Two low pressure, 21"x26" (slide valves)
- Driving wheel diameter, 6' 9"
- Tractive effort, 22,650 lb (LP cylinders at 80% pressure)
- Valve gear, Stephenson
For terminology, see Steam locomotive components
Steam locomotive components
A listing of the components found on typical steam locomotives.center|720px|Schematic steam locomotiveGuide to steam locomotive components .A listing of the components found on typical steam...