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Newton Class 2-4-0 Locomotive Class
A class of 96 2-4-0 express engines with 6ft 6in driving wheelsExplain 'Drive Wheel' built under RamsbottomExplain 'Ramsbottom, John (1814—1897)' and WebbExplain 'Webb, Francis William (1836—1906)' from 1866 to 1873. They were developed from the ‘DX’Explain '‘DX’ 0-6-0 Locomotive Class' 0-6-0 and were intended for express passenger working on the Lancaster & CarlisleExplain 'Lancaster & Carlisle Railway (LCR)', where the ‘Problems’Explain 'Problem 2-2-2 Locomotive Class' were having difficulties in adverse weather conditions. All were ‘rebuilt’ (actually replaced by) ‘Large Jumbos’ by the early 1890’s.
Patent 2-2-2 Locomotive Class
In 1852 McConnellExplain 'McConnell, James Edward (1815—1883)' produced his ‘Patent’ 2-2-2s to work the London–Birmingham trains in two hours. They had outside bearingsExplain 'Bearing' and the boilerExplain 'Boiler' was pitched very low, with a recess to accommodate the cranksExplain 'Cranks' and upward inclined cylindersExplain 'Cylinder'. The ‘patent’ feature was the design of the fireboxExplain 'Fire Box' which had a combustion chamberExplain 'Combustion Chamber' to burn coal instead of coke.
Pennsylvania
A locomotive of the “Teutonic” classExplain 'Teutonic 2-2-2-0 Locomotive Class', ordered by the Pennsylvania Railroad for a trial of Webb’sExplain 'Webb, Francis William (1836—1906)' compounding system. Various locomotive builders objected, successfully, that as a Railway Company the LNWR was entitled to build locomotives for itself but not to trade in locomotives.
Precedent 2-4-0 Locomotive Class
The ‘Precedents’ were the 6ft 6in counterparts of the 5ft 6in ‘Precursors’Explain 'Precursor 2-4-0 Locomotive Class (1)' and were introduced in December 1874. They had 140 psiExplain 'PSI (Pounds per Square Inch)' BoilersExplain 'Boiler' and 7/8in framesExplain 'Frame', a cab, Webb’s closed safety valvesExplain 'Safety Valve' and no brakes on the engine.
Precursor 2-4-0 Locomotive Class (1)
A series of 2-4-0’s built by F.W. WebbExplain 'Webb, Francis William (1836—1906)' from 1874 with 5ft 6in driving wheelsExplain 'Drive Wheel' thought to be better suited to hill climbing on the Crewe-Carlisle line; where as the ‘Precedents’Explain 'Precedent 2-4-0 Locomotive Class' although similar in many other aspects had 6ft 6in wheels. Precursor had the usual Webb features, plain chimney top, a cab, they also had open Ramsbottom safety Valves, horizontal smoke box door, hook-type front coupling and no brakes on the engine. They were all replaced by 2-4-2 5ft 6in tank enginesExplain 'Tank Locomotive' from 1890.
Precursor 4-4-0 Locomotive Class (2)
A class of 130 very successful 4-4-0 express passengerExplain 'Express Passenger' engines built by George WhaleExplain 'Whale, George (1842—1910)' from 1904. After the value of superheatingExplain 'Super Heated Steam' was proved many of the class received superheater boilers with extended smoke boxesExplain 'Smoke Box' and their performance was then indistinguishable from the “George the Fifths”Explain 'George the Fifth 4-4-0 Locomotive Class'; they retained separate splashersExplain 'Splasher' over the driving wheels and so were different in appearance. They were the first of Whale’s larger engines and the last one was not scrapped until 1949.
Precursor Tank Locomotive Class
A 4-4-2 tank locomotiveExplain 'Tank Locomotive' developed from Whale’sExplain 'Whale, George (1842—1910)'Precursor Explain 'Precursor 4-4-0 Locomotive Class (2)' passenger engines.
Prince of Wales 4-6-0 Locomotive Class
A class of 4-6-0 locomotives built by Bowen CookeExplain 'Bowen Cooke, Charles J (1859—1920)' from 1911 – the superheatedExplain 'Super Heated Steam' version of the WhaleExplain 'Whale, George (1842—1910)' “Experiment” classExplain 'Experiment 4-6-0 Locomotive Class (2)' (as “George the Fifth”Explain 'George the Fifth 4-4-0 Locomotive Class' was of the “Precursor”Explain 'Precursor 4-4-0 Locomotive Class (2)' class) and the main work-horse of LNWR express passengerExplain 'Express Passenger' services from its introduction. During the First World War, some were built by outside companies and not at Crewe.
Problem 2-2-2 Locomotive Class
Designed by John RamsbottomExplain 'Ramsbottom, John (1814—1897)' and introduced in 1859, the first of the ‘7ft 6in Single’ class was No.184 Problem. This name came from a withdrawn Trevithick 2-4-0 goods engine and originally had a mathematical connotation, another of the class being Theorem. They incorporated all the usual Ramsbottom features: his design of chimney top, safety valvesExplain 'Safety Valve' and screw reverserExplain 'Screw Reverse', horizontal smoke boxExplain 'Smoke Box' door, no cab, no brakes on the engine and no top lamp socket. The class is also known by one of the famous members of the class ‘Lady of the Lake’Explain 'Lady of the Lake 2-2-2 Locomotive Class' as it was awarded a bronze medal at the International Exhibition in 1862
Pug Locomotive Class
A common term in Scotland for a small shuntingExplain 'Shunting' locomotive – typically an 0-4-0 tank. ‘Pug’ was a dialect word meaning ‘monkey’.
Renown Locomotive Class
In 1908 Whale began converting Webb’s “Jubilee”Explain 'Jubilee 4-4-0 Locomotive Class' class into two-cylinder simple engines, by taking off the outside cylindersExplain 'Cylinder', lining up the inside cylinders to 18½ inches and fitting “Alfred the Great”Explain 'Alfred the Great Locomotive Class' boilers and Precursor-styleExplain 'Precursor 4-4-0 Locomotive Class (2)' cabs — in effect making them into smaller “Precursors”. The first of these conversions was to 1918 “Renown”, which gave its name to the whole class. Though these conversions went ahead quite slowly, almost all “Jubilees” and most “Benbows”Explain 'Benbow Locomotive Class' were eventually converted.
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