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Road-switcher
A road switcher is a type of railroad locomotive designed to both haul railcars in mainline service and shunt them in railroad yards. Both type and term are North American in origin, although similar types have been used elsewhere. A road switcher must be able to operate and have good visibility in both directions. As a road engine, a road switcher must be able to operate at road speeds, with suitable power and cooling capacity. It has high-speed road trucks rather than low-speed switcher only trucks. Modern road trucks are always equipped with "frictionless" roller bearings, whereas switcher trucks were almost always equipped with "friction" plain bearings, until plain bearings were outlawed in interchange service on both railcars and locomotives. Overview For the reasons given above, road switchers are generally hood units. The set-back cab of a hood unit provides more safety in the event of a collision at speed than most switcher designs, and the rear visibility is muc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ALCO RS-2
The ALCO RS-2 is a B-B diesel-electric locomotive built by the American Locomotive Company (ALCO) from 1946 to 1950. ALCO introduced the model after World War II as an improvement on the ALCO RS-1. Between 1946 and 1950, 377 examples of the RS-2 were built, primarily for American and Canadian customers. ALCO discontinued the RS-2 in 1950 in favor of the very similar RS-3, which was significantly more popular. Several examples have been preserved. Design and development The RS-2 was a further development of the road switcher concept. It had more horsepower than the RS-1, to better meet the needs of heavy road service. Externally, the RS-2 bodywork was more rounded, while mechanically the new 244 engine was introduced. A turbocharged four stroke V12 with a bore and stroke developing 1,500 (later 1,600) hp at 1,000 rpm, it had a smaller cylinder, higher cylinder speed design than the 539 used in the RS-1. Production of the RS-2 was delayed several months while Alco worked o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DB Class V 90
The DB Class V90 (after 1968 the DB Class 290) locomotive is a German road switcher diesel-hydraulic locomotive for shunting and freight hauling. History and design The DB Class V90 locomotives are similar to DB Class V 100 (Class 211 & 212) locomotives, they stemmed from a need for a heavy shunting locomotive - it was originally planned to create a heavy shunting variant of the V 100 (ballasted and with reinforced frame) to be produced, but this did not come to pass due to the design's stability problems. Maschinenbau Kiel in co-operation with BZA München designed a longer and heavier locomotive, of a completely new design. In 1964, a pilot production of 20 of these were manufactured with a engine as used in the DB Class V100.1 and a 70 km/h top speed. In 1974 the first locomotive of the main production was produced - these locomotives had the engine used in the DB Class V100.2 and a top speed of 80 km/h, the length of the locomotive was also extended to 14.32 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
British Rail Class 20
The British Rail Class 20, otherwise known as an English Electric Type 1, is a class of diesel-electric locomotive. In total, 228 locomotives in the class were built by English Electric between 1957 and 1968, the large number being in part because of the failure of other early designs in the same power range to provide reliable locomotives. The locomotives were originally numbered D8000–D8199 and D8300–D8327. They are known by railway enthusiasts as "Choppers". Overview Designed around relatively basic technology, the 73-tonne locomotives produce and can operate at up to . Designed to work light mixed freight traffic, they have no train heating facilities. Locomotives up to D8127 were fitted with disc indicators in the style of the steam era; when headcodes were introduced in 1960 the locomotive’s design was changed to incorporate headcode boxes. Although older locomotives were not retro-fitted with headcode boxes, a few of the earlier batch acquired headcode boxes a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
British Rail Class 16
The British Rail Class 16 also known as the North British Type 1 was a type of diesel locomotive designed and manufactured by the North British Locomotive Company. A total of ten were produced, these being numbered D8400-D8409. The type was ordered by British Railways (BR) as an element of the 1955 Modernisation Plan. The design was largely derived from North British's earlier prototype locomotive, designated British Rail 10800, No. 10800, produced during the late 1940s; it also incorporated several engineering approaches common to steam locomotives, the company allegedly having difficulty transitioning to the new traction format. Akin to several other List of British Rail power classifications, Type 1 designs, they were relatively compact locomotives that were intended primarily for local freight traffic. The performance of the type was found to be lacking in comparison with its peers, thus the potential for follow-on orders evaporated and no further examples were constructed b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
British Rail Class 15
The British Rail Class 15 diesel locomotives, also known as the BTH Type 1, were designed by British Thomson-Houston, and built by the Yorkshire Engine Company and the Clayton Equipment Company, between 1957 and 1961. They were numbered D8200-D8243. The Class 15 was ordered by British Railways (BR) shortly after the announcement of the 1955 Modernisation Plan, which led to the procurement of a diverse number of diesel locomotives under the 'pilot scheme'. Shortly following the completion of the first locomotive during 1957, its performance was sufficient to justify multiple follow-on orders, leading to a total fleet of 44 locomotives. In service, the type was relatively unreliable, much of this been traceable to its Paxman 16YHXL power unit. Its fortunes were further impacted by inconsistent policy making. During the late 1960s, it was decided to withdraw the Class 15 in favour of the more numerous and successful British Rail Class 20 locomotive, both types having been dev ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
British Rail Class 17
The British Rail Class 17 (also known as the Clayton Type 1) was a class of 117 Bo-Bo diesel-electric locomotives built 1962–1965 by Clayton Equipment Company and their sub-contractor Beyer, Peacock & Co., on behalf of British Railways (BR). During the 1950s and 1960s BR procured a wide range of Type 1 diesel locomotives, many of them under the Pilot Scheme. However, several officials felt that the single-cabbed arrangement used by the majority of Type 1s presented drivers with visibility difficulties in the 'less convenient' direction. BR therefore approached several manufacturers to seek a new locomotive that had a centre cab and low bonnets to maximise visibility. Clayton were selected to produce their proposed locomotive as the Class 17. Its low engine covers required the use of a pair of Paxman 6ZHXL six-cylinder horizontal engines, which had been intended for powering railcars; it was a somewhat unorthodox arrangement for the era. Production of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
British Rail Class 14
The British Rail Class 14 is a type of small diesel-hydraulic locomotive built in the mid-1960s. Twenty-six of these 0-6-0 locomotives were ordered in January 1963, to be built at British Railways' Swindon Works. The anticipated work for this class was trip working movements between local yards and short-distance freight trains. The good all-around visibility from the cab and dual controls also made them capable of being used for shunting duties. The order was expanded from 26 to 56 in mid-1963, before work had started on the first order. They were numbered D9500-D9555. Technical details In July 1964, the first of a class of 56 locomotives appeared from Swindon Works. These were later designated as TOPS Class 14 by British Railways. They are known as 'Teddy Bears' by enthusiasts, following a comment by Swindon Works' erecting shop foreman George Cole who quipped "We've built ''The Great Bear'', now we're going to build a 'Teddy Bear'!" In outline they have a cab offset from th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Power Inverter
A power inverter, inverter or invertor is a power electronic device or circuitry that changes direct current (DC) to alternating current (AC). The resulting AC frequency obtained depends on the particular device employed. Inverters do the opposite of rectifiers which were originally large electromechanical devices converting AC to DC. The input voltage, output voltage and frequency, and overall power handling depend on the design of the specific device or circuitry. The inverter does not produce any power; the power is provided by the DC source. A power inverter can be entirely electronic or may be a combination of mechanical effects (such as a rotary apparatus) and electronic circuitry. Static inverters do not use moving parts in the conversion process. Power inverters are primarily used in electrical power applications where high currents and voltages are present; circuits that perform the same function for electronic signals, which usually have very low currents and vo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diesel Locomotive
A diesel locomotive is a type of railway locomotive in which the prime mover is a diesel engine. Several types of diesel locomotives have been developed, differing mainly in the means by which mechanical power is conveyed to the driving wheels. Early internal combustion locomotives and railcars used kerosene and gasoline as their fuel. Rudolf Diesel patented his first compression-ignition engine in 1898, and steady improvements to the design of diesel engines reduced their physical size and improved their power-to-weight ratios to a point where one could be mounted in a locomotive. Internal combustion engines only operate efficiently within a limited power band, and while low power gasoline engines could be coupled to mechanical transmissions, the more powerful diesel engines required the development of new forms of transmission. This is because clutches would need to be very large at these power levels and would not fit in a standard -wide locomotive frame, or wear too quic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
EMD Dash 2
The EMD Dash 2 is a line of diesel-electric locomotives introduced by General Motors' Electro-Motive Division (EMD) on January 1, 1972. Designations of these models were those of the former models with "-2" added (e.g., the SD40 was replaced by the SD40-2). They retained the basic specifications of the earlier models in terms of power output and most other features, but introduced a number of improvements to the locomotives' internal systems, specifically the electrical systems and the trucks of the locomotives. These were intended to improve availability, efficiency, and ease of maintenance. One major improvement was a modularized electrical control cabinet, allowing maintenance by unit replacement and the use of common parts. These concepts were first tested on the DDA40X. Changes Minor externally visible changes common across the whole line include the following: * Modified trucks with damping struts. Four-axle trucks have damping struts on two diagonally opposite corners. Si ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
GE AC6000CW
The AC6000CW is a diesel electric locomotive built between 1995 and 2001 by GE Transportation. It is among the world's most powerful single-engined diesel locomotives. The locomotive was designed for extremely high horsepower needs, such as pulling heavy coal and ore trains. Most examples were purchased by two railroads: Union Pacific and CSX. Design and production The AC6000CW was designed at the height of a horsepower race between the two major locomotive manufacturers, Electro-Motive Division of La Grange, Illinois with the SD90MAC, and GE Transportation of Erie, Pennsylvania with the AC6000CW, in the early to mid 1990s. The goal was . GE worked with Deutz-MWM of Germany in 1994 to design and construct the 7HDL engine for the locomotives. The first locomotive with a 7HDL was the "Green Machine" GE 6000, nicknamed for its green paint scheme. The first production models were also built in 1995: CSX Transportation 600-602, and Union Pacific Railroad 7000-7009. All these locomo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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