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FS Class 910
FS Class 910 were 2-6-2 tank locomotives designed by Guglielmo Cappa for Rete Sicula where they were registered as RS Class 400. They were absorbed by Italian State Railways (FS) in 1905 and became FS Class 910. History With the conventions of 1885, Rete Sicula took over the lines of Società per le Strade Ferrate Calabro-Sicule and had to face the problems of constructing new lines and introducing modern locomotives. The engineer Guglielmo Cappa designed the Class 400 steam locomotives which were re-registered as FS Class 910 on nationalization in 1905. The locomotive was designed to tackle steeply-graded lines, such as Messina - Palermo with its pass of the Peloritani Mountains and its long tunnel. It also had to be suitable for minor local or commuter services and to have the characteristic of bidirectionality, to gain time at terminal stations by avoiding the need for turntables. The choice was a 2-6-2T which allowed the same speed in both directions of travel. The lo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2-6-2
Under the Whyte notation for the classification of steam locomotives, represents the wheel arrangement of two leading wheels, six coupled driving wheels and two trailing wheels. This arrangement is commonly called a Prairie. Overview The majority of American 2-6-2s were tender locomotives, but in Europe tank locomotives, described as , were more common. The first 2-6-2 tender locomotives for a North American customer were built by Brooks Locomotive Works in 1900 for the Chicago, Burlington and Quincy Railroad, for use on the Midwestern prairies. The type was thus nicknamed the Prairie in North American practice. This name was often also used for British locomotives with this wheel arrangement. As with the 2-10-2, the major problem with the 2-6-2 is that these engines have a symmetrical wheel layout, with the centre of gravity almost over the centre driving wheel. The reciprocation rods, when working near the centre of gravity, induce severe side-to-side nosing which r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Voghera
The Castle of Voghera in a 19th-century etching. Voghera ( Vogherese dialect of Emilian: ''Vughera''; Latin: ''Forum Iulii Iriensium'') is a town and ''comune'' in the Province of Pavia in the Italian region Lombardy. The population was 39,374 as of 2017. It is the third most populated town in the province, after Pavia and Vigevano. It is located 30 km south-southwest of that city, on the Staffora (a tributary of the Po). It is the main town of Oltrepò Pavese and is an important rail and road hub as well as a renowned wine producer. History Known in ancient times as ''Iria'', the town took its name from the river on which it was situated. It was on the road from Piacenza to '' Dertona'', and was made a colony by Augustus (''colonia Forum Iulium Iriensium''). In the 1st century CE, it was destroyed by the Rugii, and it is next mentioned as ''Viqueria'' (contracted from ''vicus Iriae'', Iria's village) in the 10th century. After several lordships, it was acquired by t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Railway Museum Of Pietrarsa
The National Railway Museum of Pietrarsa ( it, Museo Nazionale Ferroviario di Pietrarsa, italic=no) lies beside the Naples–Portici railway, between the city of Naples and the towns of Portici and San Giorgio a Cremano. Pietrarsa is an area among these villages in the past known as “Pietra Bianca” (white stone) but it was renamed Pietrarsa (burnt stone) after the eruption of the Vesuvius in 1631. The museum is housed in what was originally the old Bourbon workshop Officine di Pietrarsa, founded in 1840 at the command of Ferdinand II of Bourbon where steam machines for ships and boilers for locomotives were built. The workshop was organized in pavilions (where the collection is today displayed) which housed the various departments, each specializing in a different part of the production cycle. Overview In 1830, Ferdinand became king of the Kingdom of the two Sicilies. At the beginning, he had a small factory built in Torre Annunziata to produce steam engines for ships and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Walschaerts Valve Gear
The Walschaerts valve gear is a type of valve gear used to regulate the flow of steam to the pistons in steam locomotives, invented by Belgian railway engineer Egide Walschaerts in 1844. The gear is sometimes named without the final "s", since it was incorrectly patented under that name. It was extensively used in steam locomotives from the late 19th century until the end of the steam era. History The Walschaerts valve gear was slow to gain popularity. The Stephenson valve gear remained the most commonly used valve gear on 19th-century locomotives. However, the Walschaerts valve gear had the advantage that it could be mounted entirely on the outside of the locomotives, leaving the space between the frames clear and allowing easy access for service and adjustment, which resulted in it being adopted in some articulated locomotives. The first locomotive fitted with the Walschaerts valve gear was built at the Belgian Tubize workshops, and was awarded a gold medal at the 1873 Univ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Slide Valve
The slide valve is a rectilinear valve used to control the admission of steam into and emission of exhaust from the cylinder of a steam engine. Use In the 19th century, most steam locomotives used slide valves to control the flow of steam into and out of the cylinders. In the 20th century, slide valves were gradually superseded by piston valves, particularly in engines using superheated steam. There were two reasons for this: * With piston valves, the steam passages can be made shorter. This reduces resistance to the flow of steam and improves efficiency. * It is difficult to lubricate slide valves adequately in the presence of superheated steam. Murdoch's D slide valve The D slide valve, or more specifically Long D slide valve, is a form of slide valve, invented by William Murdoch and patented in 1799. It is named after the hollow central D-sectioned piston. This valve worked by "connecting the upper and lower valves so as to be worked by one rod or spindle, and in ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Piston Valves
Piston valves are one form of valve used to control the flow of steam within a steam engine or locomotive. They control the admission of steam into the cylinders and its subsequent exhausting, enabling a locomotive to move under its own power. The valve consists of two piston heads on a common spindle moving inside a steam chest, which is essentially a mini-cylinder located either above or below the main cylinders of the locomotive. Overview In the 19th century, steam locomotives used slide valves to control the flow of steam into and out of the cylinders. In the 20th century, slide valves were gradually superseded by piston valves, particularly in engines using superheated steam. There were two reasons for this: * It is difficult to lubricate slide valves adequately in the presence of superheated steam * With piston valves, the steam passages can be made shorter. This, particularly following the work of André Chapelon, reduces resistance to the flow of steam and improves ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Compound Locomotive
A compound locomotive is a steam locomotive which is powered by a compound engine, a type of steam engine where steam is expanded in two or more stages. The locomotive was only one application of compounding. Two and three stages were used in ships, for example. Compounding became popular for railway locomotives from the early 1880s and by the 1890s were becoming common. Large numbers were constructed, mostly two- and four-cylinder compounds, in France, Germany, Austria, Hungary, and the United States. It declined in popularity due to maintenance issues and because superheating provided similar efficiencies at lower cost. Nonetheless, compound Mallets were built by the Norfolk and Western Railway right up to 1952. Introduction In the usual arrangement for a compound engine the steam is first expanded in one or two high-pressure ''(HP)'' cylinders, then having given up some heat and lost some pressure, it exhausts into a larger-volume low-pressure ''(LP)'' cylinder, (or two, - or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saturated Steam
Steam is a substance containing water in the gas phase, and sometimes also an aerosol of liquid water droplets, or air. This may occur due to evaporation or due to boiling, where heat is applied until water reaches the enthalpy of vaporization. Steam that is saturated or superheated is invisible; however, "steam" often refers to wet steam, the visible mist or aerosol of water droplets formed as water vapor condenses. Water increases in volume by 1,700 times at standard temperature and pressure; this change in volume can be converted into mechanical work by steam engines such as reciprocating piston type engines and steam turbines, which are a sub-group of steam engines. Piston type steam engines played a central role in the Industrial Revolution and modern steam turbines are used to generate more than 80% of the world's electricity. If liquid water comes in contact with a very hot surface or depressurizes quickly below its vapor pressure, it can create a steam explosion. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World War II
World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposing military alliances: the Allies and the Axis powers. World War II was a total war that directly involved more than 100 million personnel from more than 30 countries. The major participants in the war threw their entire economic, industrial, and scientific capabilities behind the war effort, blurring the distinction between civilian and military resources. Aircraft played a major role in the conflict, enabling the strategic bombing of population centres and deploying the only two nuclear weapons ever used in war. World War II was by far the deadliest conflict in human history; it resulted in 70 to 85 million fatalities, mostly among civilians. Tens of millions died due to genocides (including the Holocaust), starvation, massa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diesel Engine
The diesel engine, named after Rudolf Diesel, is an internal combustion engine in which ignition of the fuel is caused by the elevated temperature of the air in the cylinder due to mechanical compression; thus, the diesel engine is a so-called compression-ignition engine (CI engine). This contrasts with engines using spark plug-ignition of the air-fuel mixture, such as a petrol engine ( gasoline engine) or a gas engine (using a gaseous fuel like natural gas or liquefied petroleum gas). Diesel engines work by compressing only air, or air plus residual combustion gases from the exhaust (known as exhaust gas recirculation (EGR)). Air is inducted into the chamber during the intake stroke, and compressed during the compression stroke. This increases the air temperature inside the cylinder to such a high degree that atomised diesel fuel injected into the combustion chamber ignites. With the fuel being injected into the air just before combustion, the dispersion of the fuel i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diesel-Zarlatti Locomotive
The Diesel-Zarlatti locomotive was a prototype railway locomotive, built in Italy in 1929, which adopted a hybrid diesel-steam transmission system. History In the 1920s, there was a search for alternatives to the steam locomotive for railway traction, to reduce cost and improve efficiency. The main alternatives were railway electrification or the use of an internal combustion engine, such as the diesel engine. A disadvantage of the internal combustion engine was the need for a transmission system. One option to be explored was the conversion of an existing steam locomotive by fitting a diesel engine and an air compressor to supply compressed air to the existing steam cylinders. This was the constructive principle on which the Zarlatti locomotive was based. It may be seen as a development of the earlier Mekarski system. Between 1928 and 1929, FS steam locomotive number 910.042 was modified at the Royal Arsenal of La Spezia to test the system, which was based on the patents of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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