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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 (63 according to the LNWR Society) were rebuilt with a larger 5'2" diameter Experiment-type boilers, retaining the cylinders. These, from 1911, would be classified D. [1] 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.
George Whale was an English locomotive engineer who was born in Bocking, Essex, and educated in Lewisham, London. He worked for the London and North Western Railway (LNWR).
The London, Midland and Scottish Railway (LMS) Royal Scot Class is a class of 4-6-0 express passenger locomotive introduced in 1927. Originally having parallel boilers, all members were later rebuilt with tapered type 2A boilers, and were in effect two classes.
The Great Northern Railway (GNR) Class C1 is a type of 4-4-2 steam locomotive. One, ex GNR 251, later LNER 2800, survives in preservation.
The LNWR 1185 Class was a class of 0-8-2T steam tank locomotives designed by Charles Bowen-Cooke and introduced in 1911. They passed into LMS ownership in 1923 and 8 survived to British Railways ownership in 1948. British Railways numbers were 47875-47896.
The London and North Western Railway (LNWR) Precursor Class, the second to be known by that name, was a class of 4-4-0 steam locomotives.
The London and North Western Railway (LNWR) Experiment Class was a class of 4-6-0 steam locomotive designed by George Whale.
The London and North Western Railway (LNWR) Renown Class was a class of 4-4-0 steam locomotives. They were rebuilds of F.W. Webb's 4-cylinder compounds of the Jubilee and Alfred the Great classes into 2-cylinder simple engines by George Whale, later continued by Charles Bowen-Cooke.
The London and North Western Railway (LNWR) Jubilee Class was a class of 4-4-0 4-cylinder compound locomotives by F.W. Webb. A total of forty were built from 1897–1900.
The London and North Western Railway (LNWR) Alfred the Great class, after modification known as the Benbow Class was a class of 4-4-0 4-cylinder compound locomotives by F.W. Webb. A total of forty were built from 1901–1903. They were a development of the Jubilee Class, with a slightly larger boiler.
The London and North Western Railway (LNWR) Class A was a class of 0-8-0 steam locomotives. From 1893 to 1900, Crewe Works built 111 of these engines, which had a three-cylinder compound arrangement, and were designed by Francis Webb. According to the LNWR Society, 110 were built between 1894 and 1900.
The London and North Western Railway (LNWR) Class B was a class of 0-8-0 steam locomotives introduced in 1901. A development of the three-cylinder compound Class A, they had a 4-cylinder compound arrangement. 170 were built between 1901-1904.
The London and North Western Railway (LNWR) 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 to Class C between 1904 and 1906 by George Whale.
The London and North Western Railway (LNWR) Class C1 was a class of 0-8-0 steam locomotives. 34 were rebuilt by Charles Bowen Cooke from Class A 3-cylinder compounds between 1909 and 1912.
The London and North Western Railway (LNWR) Class E was a class of 2-8-0 steam locomotives in service between 1904 and 1928.
The London and North Western Railway (LNWR) Class F was a class of 2-8-0 steam locomotives in service between 1906 and 1928.
The London and North Western Railway (LNWR) Class G1 was a class of 0-8-0 steam locomotives. It was a superheated version of the LNWR Class G with 8 inch piston valves. The prototype was rebuilt in 1912 from a member of Class G and a further 170 new locomotives were built between 1912 and 1918. In addition, 278 older locomotives were rebuilt to the G1 specification between 1917 and 1934.
The London and North Western Railway (LNWR) Class G2 is a class of 0-8-0 steam locomotives. 60 were built at Crewe Works in 1921–1922. Uniquely amongst classes of LNWR 8-coupled tender engines, they were not rebuilt from or into other classes. Slightly confusingly the LNWR Class G2a is sometimes considered a subclass, but not in this article. They were classified by the London, Midland and Scottish Railway (LMS) as 5, from 1928 7F.
The London and North Western Railway (LNWR) Class G were several related classes of 0-8-0 steam locomotives. These 0-8-0s were the principal work-horses for freight traffic on the latter-day London & North Western.
The London and North Western Railway (LNWR) Class G2A was a class of 0-8-0 steam locomotives. They were upgraded from LNWR Class G1 principally by the fitting of a higher pressure boiler. Some of the G2As subsequently received lower pressure boilers on overhaul, taking them back into Class G1.
The LNWR 18-inch Goods was a class of 310 0-6-0 freight steam locomotives built by the London and North Western Railway at their Crewe Works between 1880 and 1902.
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