LNWR Class D
Encyclopedia
The London and North Western Railway
(LNWR) Class D was a class of 0-8-0 steam locomotives. They were simple engine rebuilds of earlier Webb Class A
three-cylinder compound engines.
Though the original rebuilds of the Class As had reused the existing small (4'3" diameter) boilers with 19.5" diameter cylinders (Class C
, the smaller boilers could not raise adequate steam, so from 1906 the next 62 rebuilds were rebuilt with a larger 5'2" diameter Experiment
-type boilers, retaining the cylinders. These, from 1911, would be classified D. These rebuilds left smaller boilers available and so from 1906 rebuilds used these smaller boilers with smaller cylinders to Class C1
.
To these compound rebuilds was added the prototype eight-coupled goods engine No. 2524 which was rebuilt with a larger boiler in 1906. Previously it had been similar to the Class C
with a smaller boiler; though was not classified as such since the letter classification was introduced in 1911.
All Ds were numbered in the 18xx or 25xx series by the LNWR. All passed into LMS ownership in 1923, and the LMS assigned them the numbers 9002-64, sequentially in order of rebuild date.
The LMS rebuilt all of the Ds with the addition of superheating, taking them into Class G1, nicknamed "Super Ds" between 1925 and 1934. Many carried their LNWR numbers until rebuilt for a second time, and the LMS number thereafter. And thus the class was rendered extinct.
London and North Western Railway
The London and North Western Railway was a British railway company between 1846 and 1922. It was created by the merger of three companies – the Grand Junction Railway, the London and Birmingham Railway and the Manchester and Birmingham Railway...
(LNWR) Class D was a class of 0-8-0 steam locomotives. They were simple engine rebuilds of earlier Webb Class A
LNWR Class A
The London and North Western Railway Class A was a class of 0-8-0 steam locomotives. From 1893 to 1900, Crewe built 111 of these engines, which had a three cylinder compound arrangement, and were designed by Francis Webb....
three-cylinder compound engines.
Though the original rebuilds of the Class As had reused the existing small (4'3" diameter) boilers with 19.5" diameter cylinders (Class C
LNWR Class C
The London and North Western Railway Class C was a class of 0-8-0 steam locomotives. They were two cylinder simple expansion rebuilds of the three-cylinder Class A designed by F.W. Webb. Fifteen Class As were converted 1904-1906 by George Whale. All passed into LMS ownership in 1923, and the...
, the smaller boilers could not raise adequate steam, so from 1906 the next 62 rebuilds were rebuilt with a larger 5'2" diameter Experiment
LNWR Whale Experiment Class
The London and North Western Railway Experiment Class of was a class of 4-6-0 steam locomotive designed by George Whale.They were an extended version of the Whale's Precursor Class 4-4-0, with slightly smaller driving wheels. The first of the class, 66 Experiment was built in 1905 and a total of...
-type boilers, retaining the cylinders. These, from 1911, would be classified D. These rebuilds left smaller boilers available and so from 1906 rebuilds used these smaller boilers with smaller cylinders to Class C1
LNWR Class C1
The London and North Western Railway Class C1 was a class of 0-8-0 steam locomotives. 34 were rebuilt by Bowen Cooke from Class A 3-cylinder compounds between 1906-1909....
.
To these compound rebuilds was added the prototype eight-coupled goods engine No. 2524 which was rebuilt with a larger boiler in 1906. Previously it had been similar to the Class C
LNWR Class C
The London and North Western Railway Class C was a class of 0-8-0 steam locomotives. They were two cylinder simple expansion rebuilds of the three-cylinder Class A designed by F.W. Webb. Fifteen Class As were converted 1904-1906 by George Whale. All passed into LMS ownership in 1923, and the...
with a smaller boiler; though was not classified as such since the letter classification was introduced in 1911.
All Ds were numbered in the 18xx or 25xx series by the LNWR. All passed into LMS ownership in 1923, and the LMS assigned them the numbers 9002-64, sequentially in order of rebuild date.
The LMS rebuilt all of the Ds with the addition of superheating, taking them into Class G1, nicknamed "Super Ds" between 1925 and 1934. Many carried their LNWR numbers until rebuilt for a second time, and the LMS number thereafter. And thus the class was rendered extinct.
Further reading
- Bob EsseryBob EsseryRobert J. "Bob" Essery is a British railway modeller and historian with a particular interest in the London Midland and Scottish Railway and one of its principal constituents, the Midland Railway ....
& David JenkinsonDavid JenkinsonDavid Jenkinson was a railway modeller and historian, who had a particular interest in the London, Midland and Scottish Railway and was president of the LMS Society.- Biography :...
An Illustrated Review of LMS Locomotives Vol. 2 Absorbed Pre-Group Classes Western and Central Divisions - Edward TalbotEdward TalbotEdward Talbot may refer to:*Edward Talbot, 8th Earl of Shrewsbury *Edward Kelley , also known as Edward Talbot, notorious sixteenth-century English criminal and medium*Edward Talbot , Anglican Bishop...
, The London & North Western Railway Eight-Coupled Goods Engines - Willie YeadonWillie YeadonWillie Brayshaw Yeadon was a British railway historian known for his magnum opus, Yeadon's Register of LNER Locomotives which covers every class of locomotive inherited and built by the London and North Eastern Railway, including those engines built to LNER designs by British Railways...
, Yeadon's Compendium of LNWR Locomotives Vol 2 Goods Tender Engines