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FS Class 851
Class 851 locomotives were a class of steam locomotives of the Italian State Railways (FS). They were designed and built by the Adriatic Network (RA) as machines for line service. In 1905, together with the locomotives of the classes FS 290, 600 and 870 ex-RA, they were included among those that the FS deemed worthy of further orders pending the completion of the designs of new classes suitable to cope with the development of passenger and freight traffic resulting from nationalization.In the period of the "second Conventions," between 1885 and 1905, passenger traffic on the network later merged into the FS increased from 1 782 000 to 4 575 000 pkm. In the same two decades, freight traffic increased from 1 695 000 to 4 997 000 tkm. In the decade to 1915 passenger traffic increased to 5 028 000 pkm and freight traffic to 8 874 000 tkm. Cf. Gennaro Trotta, ''Alcuni elementi statistici di attività ferroviaria italiana'', in ''Ingegneria ferroviaria'', 16 (1961), n. 7-8, p. 775. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Società Italiana Ernesto Breda
Società Italiana Ernesto Breda (), more usually referred to simply as Breda, was an Italian mechanical manufacturing company founded by Ernesto Breda in Milan in 1886. History The firm was founded by Ernesto Breda in Milan in 1886. It originally manufactured locomotives and other railway machinery, but later branched out into armaments and aircraft. Occasionally, not continuously, the company also built trolleybuses. In 1935, it acquired the railway division of Officine Ferroviarie Meridionali and, soon afterwards, the aircraft division of the same company. Breda-designed machine guns such as the Breda Model 30 and Breda Model 37 were standard issue weapons for the Royal Italian Army during the Second Italo-Abyssinian War, the Italian Invasion of Albania and World War 2. At the peak of its wartime production, the company had 26,000 employees. By 1954, its workforce had been reduced to around 8,000. In 1962, Breda was nationalised as part of EFIM, but was liquidated in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tractive Effort
In railway engineering, the term tractive effort describes the pulling or pushing capability of a locomotive. The published tractive force value for any vehicle may be theoretical—that is, calculated from known or implied mechanical properties—or obtained via testing under controlled conditions. The discussion herein covers the term's usage in mechanical applications in which the final stage of the power transmission system is one or more wheels in frictional contact with a railroad track. Defining tractive effort The term ''tractive effort'' is often qualified as ''starting tractive effort'', ''continuous tractive effort'' and ''maximum tractive effort''. These terms apply to different operating conditions, but are related by common mechanical factors: input torque to the driving wheels, the wheel diameter, coefficient of friction () between the driving wheels and supporting surface, and the weight applied to the driving wheels (). The product of and is the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saturated Vapor
Vapor pressure or equilibrium vapor pressure is the pressure exerted by a vapor in thermodynamic equilibrium with its condensed phases (solid or liquid) at a given temperature in a closed system. The equilibrium vapor pressure is an indication of a liquid's thermodynamic tendency to evaporate. It relates to the balance of particles escaping from the liquid (or solid) in equilibrium with those in a coexisting vapor phase. A substance with a high vapor pressure at normal temperatures is often referred to as '' volatile''. The pressure exhibited by vapor present above a liquid surface is known as vapor pressure. As the temperature of a liquid increases, the attractive interactions between liquid molecules become less significant in comparison to the entropy of those molecules in the gas phase, increasing the vapor pressure. Thus, liquids with strong intermolecular interactions are likely to have smaller vapor pressures, with the reverse true for weaker interactions. The vapor pre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fire-tube Boiler
A fire-tube boiler is a type of boiler invented in 1828 by Marc Seguin, 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Combustor
A combustor is a component or area of a gas turbine, ramjet, or scramjet engine where combustion takes place. It is also known as a burner, burner can, combustion chamber or flame holder. In a gas turbine engine, the ''combustor'' or combustion chamber is fed high-pressure air by the compression system. The combustor then heats this air at constant pressure as the fuel/air mix burns. As it burns the fuel/air mix heats and rapidly expands. The burned mix is exhausted from the combustor through the nozzle guide vanes to the turbine. In the case of ramjet or scramjet engines, the exhaust is directly fed out through the nozzle. A combustor must contain and maintain stable combustion despite very high air flow rates. To do so combustors are carefully designed to first mix and ignite the air and fuel, and then mix in more air to complete the combustion process. Early gas turbine engines used a single chamber known as a can-type combustor. Today three main configurations exist: can, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steam Generator (railroad)
A steam generator is a type of boiler (steam generator), boiler used to produce steam for climate control and potable water heating in railroad Passenger car (rail), passenger cars. The output of a railroad steam generator is low-pressure, saturated steam that is passed through a system of water pipe, pipes and Water pipe, conduits throughout the length of the train. Steam generators were developed when diesel locomotives started to replace steam locomotives on passenger trains. In most cases, each passenger locomotive was fitted with a steam generator and a feedwater supply tank. The steam generator used some of the locomotive's diesel fuel supply for combustion. When a steam-generator–equipped locomotive was not available for a run, a so-called "heating car" fitted with one or two steam generators was inserted between the last locomotive in the consist and the rest of the train. Steam generators would also be fitted to individual cars to enable them to be heated independently ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rolling Chassis
A rolling chassis is the fully-assembled chassis of a motor vehicle (car, truck, bus, or other vehicle) without its coachwork, bodywork. It is equipped with running gear (engine and drivetrain) and ready for delivery to a coachbuilder to be completed. Historically, coachbuilt, bespoke luxury automobiles were finished inside and out to an owner's specifications by a coachbuilder, and specialty vehicles (such as fire engines) were outfitted by firms devoted to that task. The term is also used to describe the chassis and running gear of a vehicle in a body-off restoration. Automobiles Prior to vehicle frame#Unibody, unibodied vehicles, the rolling chassis stage was common to the manufacture of all motorcars. Mass-produced cars were supplied complete from the factory, but luxury cars such as Rolls-Royce Limited, Rolls-Royce were supplied as a chassis from the factory to several coachbuilders, in its case J Gurney Nutting & Co, H. J. Mulliner & Co., Mulliner, Park Ward, and others. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wheelset (rail Transport)
A wheelset is a pair of railroad car, railroad vehicle Train wheel, wheels mounted rigidly on an Axle#Vehicle axles, axle. Wheelsets are often mounted in a bogie ("List of railroad truck parts, truck" in North America) – a pivoted frame assembly holding at least two wheelsets – at each end of the vehicle. Most modern goods wagon, freight cars and Railroad car#Passenger cars, passenger cars have bogies each with two wheelsets, but three wheelsets (or more) are used in bogies of freight cars that carry heavy loads, and three-wheelset bogies are under some passenger cars. Four-wheeled goods wagons that were once near-universal in Europe and Great Britain and their colonies have only two wheelsets; in recent decades such vehicles have become less common as trainloads have become heavier. Conical wheel-tread Most train wheels have a cone (mathematics), conical taper of about 1 in 20 to enable the wheelset to follow Civil engineering#Surveying, curves with less ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wheel Arrangement
In rail transport, a wheel arrangement or wheel configuration is a system of classifying the way in which wheels are distributed under a locomotive. Several notations exist to describe the wheel assemblies of a locomotive by type, position, and connections, with the adopted notations varying by country. Within a given country, different notations may also be employed for different kinds of locomotives, such as steam, electric, and diesel powered. Especially in steam days, wheel arrangement was an important attribute of a locomotive because there were many different types of layout adopted, each wheel being optimised for a different use (often with only some being actually "driven"). Modern diesel and electric locomotives are much more uniform, usually with all axles driven. Major notation schemes The main notations are the Whyte notation (based on counting the wheels), the AAR wheel arrangement notation (based on counting either the axles or the bogies), and the UIC classifi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Railway Track
Railway track ( and UIC terminology) or railroad track (), also known as permanent way () or "P way" ( and Indian English), is the structure on a railway or railroad consisting of the rails, fasteners, sleepers ( railroad ties in American English) and ballast (or slab track), plus the underlying subgrade. It enables trains to move by providing a dependable, low-friction surface on which steel wheels can roll. Early tracks were constructed with wooden or cast-iron rails, and wooden or stone sleepers. Since the 1870s, rails have almost universally been made from steel. Historical development The first railway in Britain was the Wollaton wagonway, built in 1603 between Wollaton and Strelley in Nottinghamshire. It used wooden rails and was the first of about 50 wooden-railed tramways built over the subsequent 164 years. These early wooden tramways typically used rails of oak or beech, attached to wooden sleepers with iron or wooden nails. Gravel or small stones were pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 first ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
FS Class 670
The Rete Adriatica Class 500 (Italian: ''Gruppo 500''), classified after 1905 in the Ferrovie dello Stato Italiane (FS; Italian State Railways) as Class 670 (Italian: ''Gruppo 670'') was an unorthodox and iconic cab forward 4-6-0 (2′C) steam locomotive. Design and construction The Class 670 was designed by Eng. Giuseppe Zara of the Rete Adriatica (one of the two major railway companies in Italy at the beginning of the twentieth century); its design was very unorthodox, as the boiler was reversed on the frames, so that the cab and the firebox were leading and supported by the bogie, while the cylinders were at the rear. The compound arrangement was also highly peculiar, as it was the first experiment with the Plancher compound engine: this arrangement meant that there were four cylinders, in which the two high pressure (HP) ones and the two low pressure (LP) ones were paired together respectively on the left-hand and the right-hand side of the boiler, and each pair was served b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
