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SR N1 Class
The SECR N1 class was a type of 3-cylinder 2-6-0 ('mogul') steam locomotive designed by Richard Maunsell for mixed traffic duties, initially on the South Eastern and Chatham Railway (SECR), and later operated for the Southern Railway (SR). The N1 was a development of the basic principles established by the Great Western Railway's (GWR) Chief Mechanical Engineer (CME) George Jackson Churchward and by Maunsell's previous N class design.Scott-Morgan (2002), p. 18 The N1 prototype was the result of modifications made to N class No. 822 during construction in 1922. The locomotive became operational in 1923 and used parts interchangeable with other Maunsell locomotive classes. The prototype N1 was the only member of the class constructed before the SECR became part of the Southern Railway at the Grouping in 1923, and featured Holcroft conjugated valve gear, Holcroft's experience in this field later aided in the development of the Gresley conjugated valve gear which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Richard Maunsell
Richard Edward Lloyd Maunsell (pronounced "Mansell") (26 May 1868 – 7 March 1944) held the post of chief mechanical engineer (CME) of the South Eastern and Chatham Railway from 1913 until the 1923 Grouping and then the post of CME of the Southern Railway in England until 1937. He had previously worked his way up through positions in other railways in Ireland, England and India. Biography He was born on 26 May 1868 at Raheny, County Dublin, in Ireland, the seventh son of John Maunsell, a Justice of the Peace and a prominent solicitor in Dublin. He attended The Royal School, Armagh from 1882 to 1886. He commenced studies at Trinity College, Dublin on 23 October 1886 for a law degree; however by this stage he had shown a keen interest in engineering. He concurrently began an apprenticeship at the Inchicore works of the Great Southern and Western Railway (GS&WR) under H. A. Ivatt in 1888. Following completion of his degree in January 1891 he was able to complete his appr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mixed-traffic Locomotive
A locomotive or engine is a rail transport vehicle that provides the motive power for a train. If a locomotive is capable of carrying a payload, it is usually rather referred to as a multiple unit, motor coach, railcar or power car; the use of these self-propelled vehicles is increasingly common for passenger trains, but rare for freight (see CargoSprinter). Traditionally, locomotives pulled trains from the front. However, push-pull operation has become common, where the train may have a locomotive (or locomotives) at the front, at the rear, or at each end. Most recently railroads have begun adopting DPU or distributed power. The front may have one or two locomotives followed by a mid-train locomotive that is controlled remotely from the lead unit. __TOC__ Etymology The word ''locomotive'' originates from the Latin 'from a place', ablative of 'place', and the Medieval Latin 'causing motion', and is a shortened form of the term ''locomotive engine'', which was first us ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Smokebox
A smokebox is one of the major basic parts of a steam locomotive exhaust system. Smoke and hot gases pass from the firebox through tubes where they pass heat to the surrounding water in the boiler. The smoke then enters the smokebox, and is exhausted to the atmosphere through the chimney (or funnel). Early locomotives had no smokebox and relied on a long chimney to provide natural draught for the fire but smokeboxes were soon included in the design for two specific reasons. Firstly and most importantly, the blast of exhaust steam from the cylinders, when directed upwards through an airtight smokebox with an appropriate design of exhaust nozzle, effectively draws hot gases through the boiler tubes and flues and, consequently, fresh combustion air into the firebox. Secondly, the smokebox provides a convenient collection point for ash and cinders ("char") drawn through the boiler tubes, which can be easily cleaned out at the end of a working day. Without a smokebox, all char must ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tender (rail)
A tender or coal-car (US only) is a special rail vehicle hauled by a steam locomotive containing its fuel (wood, coal, oil or torrefied biomass) and water. Steam locomotives consume large quantities of water compared to the quantity of fuel, so their tenders are necessary to keep them running over long distances. A locomotive that pulls a tender is called a tender locomotive. Locomotives that do not have tenders and carry all their fuel and water on board the locomotive itself are called tank locomotives. A corridor tender is a locomotive tender with a passageway to one side, allowing crew changes on the fly. A brake tender is a tender that is heavy and used (primarily) to provide greater braking efficiency. General functions The largest steam locomotives are semi-permanently coupled by a drawbar to a tender that carries the water and fuel. The fuel source used depends on what is economically available locally. In the UK and parts of Europe, a plentiful supply of coal made ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Loading Gauge
A loading gauge is a diagram or physical structure that defines the maximum height and width dimensions in railway vehicles and their loads. Their purpose is to ensure that rail vehicles can pass safely through tunnels and under bridges, and keep clear of platforms, trackside buildings and structures. Classification systems vary between different countries, and gauges may vary across a network, even if the track gauge is uniform. The term loading gauge can also be applied to the maximum size of road vehicles in relation to tunnels, overpasses and bridges, and doors into automobile repair shops, bus garages, filling stations, residential garages, multi-storey car parks and warehouses. A related but separate gauge is the structure gauge, which sets limits to the extent that bridges, tunnels and other infrastructure can encroach on rail vehicles. The difference between these two gauges is called the clearance. The specified amount of clearance makes allowance for wobbling of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Midland Railway
The Midland Railway (MR) was a railway company in the United Kingdom from 1844. The Midland was one of the largest railway companies in Britain in the early 20th century, and the largest employer in Derby, where it had its headquarters. It amalgamated with several other railways to create the London, Midland and Scottish Railway at grouping in 1922. The Midland had a large network of lines emanating from Derby, stretching to London St Pancras, Manchester, Carlisle, Birmingham, and the South West. It expanded as much through acquisitions as by building its own lines. It also operated ships from Heysham in Lancashire to Douglas and Belfast. A large amount of the Midland's infrastructure remains in use and visible, such as the Midland main line and the Settle–Carlisle line, and some of its railway hotels still bear the name '' Midland Hotel''. History Origins The Midland Railway originated from 1832 in Leicestershire / Nottinghamshire, with the purpose of serving the needs o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
James Clayton (engineer)
James Clayton MBE (17 November 1872 – 12 October 1946) was an English mechanical engineer who worked extensively on railway locomotives. Clayton was born in Stockport, Cheshire and attended the Technical School in Manchester and thereafter served an apprenticeship at Beyer Peacock, becoming a draughtsman in their drawing office. After six years in that post he took a position with the South Eastern and Chatham Railway (SECR). In 1904, he left for a year's work with the Motor Manufacturing Company, an automobile manufacturer in Coventry, as their chief draughtsman and assistant works manager. Following this, he was hired by Cecil Paget, Chief Superintendent of the Midland Railway, to work on his high pressure multi-cylinder locomotive. During his time with the Midland, he spent two years in charge of the casualty and investigation section, and was appointed Assistant Chief Locomotive Draughtsman in 1907. In 1914, he rejoined the SECR and was soon Chief Locomotive Draugh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Belpaire Firebox
The Belpaire firebox is a type of firebox used on steam locomotives. It was invented by Alfred Belpaire of Belgium in 1864. Today it generally refers to the shape of the outer shell of the firebox which is approximately flat at the top and square in cross-section, indicated by the longitudinal ridges on the top sides. However, it is the similar square cross-section inner firebox which provides the main advantages of this design i.e. it has a greater surface area at the top of the firebox where the heat is greatest, improving heat transfer and steam production, compared with a round-top shape. The flat firebox top would make supporting it against pressure more difficult (e.g. by means of girders, or stays) compared to a round-top. However, the use of a similarly shaped square outer boiler shell allows simpler perpendicular stays to be used between the shells. The Belpaire outer firebox is, nevertheless, more complicated and expensive to manufacture than a round-top version. Due ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fire-tube Boiler
A fire-tube boiler is a type of boiler in which hot gases pass from a fire through one or more tubes running through a sealed container of water. The heat of the gases is transferred through the walls of the tubes by thermal conduction, heating the water and ultimately creating steam. The fire-tube boiler developed as the third of the four major historical types of boilers: low-pressure tank or "haystack" boilers, flued boilers with one or two large flues, fire-tube boilers with many small tubes, and high-pressure water-tube boilers. Their advantage over flued boilers with a single large flue is that the many small tubes offer far greater heating surface area for the same overall boiler volume. The general construction is as a tank of water penetrated by tubes that carry the hot flue gases from the fire. The tank is usually cylindrical for the most part—being the strongest practical shape for a pressurized container—and this cylindrical tank may be either horizontal or vertic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
GWR 4300 Class
The Great Western Railway (GWR) 4300 Class is a class of 2-6-0 (mogul) steam locomotives, designed by G.J. Churchward for mixed traffic duties. 342 were built from 1911–1932. Background In 1906 Churchward fitted a more powerful Standard No. 4 boiler to his successful 3100 Class 2-6-2T to create the GWR 3150 Class. These showed themselves to be successful locomotives but their weight and water capacity meant that they tended to be restricted to suburban passenger traffic. Churchward was looking forward to the replacement of various of his predecessor’s 2-4-0 classes on secondary duties. In 1911 he therefore designed a tender version of the 3150 class which would be suitable for a wide range of intermediate duties. Design The class was ‘a total synthesis of standard parts, using the outside cylinders of the Saint, the wheels of ‘31XX’ 2-6-2 tank and the No. 4 boiler, in its superheated form.’ No prototype was required as the fundamental design had proved itse ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harold Holcroft
Harold Holcroft (12 February 1882 – 15 February 1973) was an English railway and mechanical engineer who worked for the Great Western Railway (GWR), the South Eastern and Chatham Railway (SECR) and the Southern Railway (SR). At the GWR, Holcroft helped the Chief Mechanical Engineer (CME), George Jackson Churchward, design the 4300 class 2-6-0 Moguls, and took the design principles for this class of locomotive with him when he moved to the SECR. Here, he worked as Assistant to Richard Maunsell and was involved with the design of the Maunsell Moguls, transferring to the Southern Railway when it was created by the amalgamation of the SECR with other railways at Grouping in 1923. After Maunsell's retirement in 1937, Holcroft continued to work for the Southern Railway under Oliver Bulleid until his retirement in 1946. Early life, GWR service and Holcroft conjugated valve gear Holcroft was born in Wolverhampton and undertook a premium apprenticeship at the Wolverhampton works of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Track Ballast
Track ballast forms the trackbed upon which railroad ties (sleepers) are laid. It is packed between, below, and around the ties. It is used to bear the load from the railroad ties, to facilitate drainage of water, and also to keep down vegetation that might interfere with the track structure. Ballast also holds the track in place as the trains roll over it. A variety of materials have been used as track ballast, including crushed stone, washed gravel, bank run (unwashed) gravel, torpedo gravel (a mixture of coarse sand and small gravel), slag, chats, coal cinders, sand, and burnt clay. The term "ballast" comes from a nautical term for the stones used to stabilize a ship. Construction The appropriate thickness of a layer of track ballast depends on the size and spacing of the ties, the amount of traffic on the line, and various other factors. Track ballast should never be laid down less than thick, and high-speed railway lines may require ballast up to thick.Bell 2004, p. 39 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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