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EMD DD35
The EMD DD35 was a diesel-electric locomotive of D-D wheel arrangement built by General Motors Electro-Motive Division for the Union Pacific Railroad and Southern Pacific Railroad. History In the early 1960s, Union Pacific started asking for a 3-unit ''locomotive set'' to not only replace their turbine locomotives, but to bring a new generation of diesel locomotives to their rails, and then put them into use. The EMD (Electro Motive Division of General Motors) DD35 was a cabless booster (B unit) locomotive that consisted of two GP35 locomotives prime movers (engines) and electrical systems, mounted on a common frame and covered with a single cowling, riding on a pair of 4-axle Flexicoil trucks, so each prime mover was powering a single set of 4 axles instead of two sets of 2 axles, as in the GP35. Being a "B-unit", the DD35 lacked any sort of cab, and could only be run on the main line when connected with another "A-unit" to control it; the DDA35 is an "A-unit" version of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Union Pacific GTELs
The Union Pacific GTELs were a series of gas turbine-electric locomotives built by Alco-GE and General Electric between 1952-1961 and operated by Union Pacific from 1952 to 1970. Background Union Pacific operated the largest fleet of gas turbine-electric locomotives (GTELs) of any railroad in the world. The prototype, UP 50, was the first in a series built by General Electric for Union Pacific's long-haul cargo services and marketed by the Alco-GE partnership until 1953. The prototype was introduced in 1948 and was followed by three series of production locomotives. At one point, Union Pacific said the GTELs hauled more than 10% of the railroad's freight. Fuel economy was poor, for the turbine consumed roughly twice as much fuel as an equally powerful diesel engine. This was initially not a problem, because Union Pacific's turbines burned Bunker C heavy fuel oil that was less expensive than diesel. But this highly viscous fuel is difficult to handle, with a room-temperature con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
GE U50C
The GE U50C was a diesel-electric locomotive built by GE Transportation Systems. Each was powered by two diesel engines. History Forty were built between November 1969 and November 1971 solely for Union Pacific, which numbered them 5000 to 5039. The U50C used a pair of three-axle trucks instead of the four two-axle trucks used on the earlier U50. Again, these were reused trucks, this time from the later, GE turbine locomotives. Development of the U50C was to the same UP specification that produced the EMD DDA40X "Centennial" units—a requirement for a high power locomotive for the railroad's high-speed freight trains. The span-bolster B+B-B+B design was not suited to this service, and the requirement for power at speed rather than low-speed hauling meant six powered axles would be sufficient. The design incorporated extensive weight saving features. GE replaced the 16-cylinder prime movers of the U50 with advanced 12-cylinder engines, lighter and shorter. The engines wer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ALCO Century 855
The ALCO Century 855 was a model of diesel-electric locomotive built in 1964 by the American Locomotive Company for the Union Pacific Railroad. The locomotive was notable for being ALCO's most powerful diesel-electric locomotive and, at the time, the most powerful diesel locomotive ever built,"6,000 HP Diesel-Electric for Fast Freight Traffic in USA" ''Railway Gazette'' July 3, 1964 pages 547-550 being surpassed by the EMD DDA40X in April 1969. The Century 855 was designed and built specifically for Union Pacific, which was in need of very high horsepower locomotives for its Overland Route through the Rocky Mountains. Despite its impressive power output, all three examples of the class were scrapped by early 1972 due to mechanical unreliability. History Powered by a pair of 16 cylinder ALCO 251C diesel engines, and rated at , it was ALCO's answer to the EMD DD35A and the GE U50. The C855 rode on four two-axle trucks, grouped in pairs linked by span bolsters, giving a wheel ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
EMD DDM45
The EMD DDM45 is a Metre-gauge railway, meter-gauge Diesel-electric transmission, diesel-electric locomotive built by Electro-Motive Diesel, EMD. The DD in the name means that it has eight axles in two trucks, giving it a AAR wheel arrangement#D-D wheel arrangement, while the M stands for the meter-gauge track it was to operate on, and the 45 represents the EMD SD45 that the engine was derived from. They were built for service on the Estrada de Ferro Vitória a Minas (EFVM) in Brazil. In the early 1970s, the EFVM needed not only to expand its locomotive roster, but to use the most powerful single-engined locomotives available, and the EMD SD45, SD45 represented the highest-rated model that EMD had to offer at the time. However, a large locomotive like an SD45 with its three-axle trucks was not readily adaptable to the EFVM's meter gauge trackage. The smaller traction motors of the meter gauge locomotive were unable to handle the full current capacity from the prime mover. EMD pro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
EMD DDA40X
The EMD DDA40X is a 6,600 hp (4,943 kW) D-D locomotive, built by EMD from 1969 to 1971 exclusively for the Union Pacific Railroad. It is the most powerful diesel-electric locomotive model ever built on a single frame, having two 16-645E3A diesel prime movers. Union Pacific has marked DD40X on the cab exteriors, while EMD literature inconsistently refers to this model as either DD-40X or DDA40X. UP's DDA40X locomotives were the ultimate culmination of the company's experiments with extremely powerful locomotives that began with its gas turbine-electric locomotives and DD35s. For manufacturer EMD, the construction of the world's most powerful single frame locomotive was a sign of the company's dominance of the North American diesel locomotive market, with only GE Transportation an equal competitor. The DDA40X also pioneered a number of new technologies that would go on to be incorporated in future EMD designs. Ultimately, UP did not continue with exceptionally powe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Teething Troubles
Teething is the process by which an infant's first teeth (the deciduous teeth, often called "baby teeth" or "milk teeth") appear by emerging through the gums, typically arriving in pairs. The mandibular central incisors are the first primary teeth to erupt, usually between 6 and 10 months of age and usually causes discomfort and pain to the infant. It can take several years for all 20 teeth to complete the tooth eruption. Though the process of teething is sometimes referred to as "cutting teeth", when teeth emerge through the gums they do not cut through the flesh. Instead, hormones are released within the body that cause some cells in the gums to die and separate, allowing the teeth to come through. Teething may cause a slightly elevated temperature, but not rising into the fever range of greater than . Higher temperatures during teething are due to some form of infection, such as a herpes virus, initial infection of which is extremely widespread among children of teething ag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sandbox (railways)
A sandbox is a container on most locomotives, multiple units and trams that holds sand, which is dropped on the rail in front of the driving wheels in wet and slippery conditions and on steep grades to improve traction. Sand delivery The sand may be delivered by gravity, by a steam-blast ( steam locomotives) or by compressed air. Gravity sanding requires that the sand be dry so that it runs freely. Locomotives use multiple sandboxes, so that their delivery pipes could be short and nearly vertical. Engine sheds in the UK were equipped with sand drying stoves, so that sandboxes could be refilled each morning with dry sand. Steam locomotives in the US had a single sandbox, called a sand dome, atop the boiler where the rising heat helped to dry the sand. Even with this arrangement, sand pipes tended to clog, and by the 1880s, pneumatic sanding systems were being proposed. Steam sanding The development of steam sanding was influential on locomotive design. As the sand could then ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taylor Yard, Los Angeles
Taylor Yard is the site of the Rio de Los Angeles State Park along with the new Metrolink maintenance facility located on the southern end of the former yard grounds in Los Angeles. The former railway station and classification yard and former headquarters of Southern Pacific Railroad operations in Southern California was purchased by the Southern Pacific in 1911 and continually reshaped and remade over the course of the early 20th century for the purposes of inspection, repair, and storage of freight cars on the Southern Pacific Fruit Express line. History Taylor Yard was established in 1911 on the previous site of Taylor Feed Mill (from which the yard gets its name). It was rebuilt in 1949. Competition from the trucking industry and the closure of American manufacturing plants led to the decline of the Yard after the 1950s. In 1983, an average of 25,000 railroad cars moved through Taylor Yard and 1,200 workers were employed in its operations, down from 5,000 in the 1950s. South ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
EMD F3
The EMD F3 is a B-B freight- and passenger-hauling carbody diesel locomotive produced between July 1945 and February 1949 by General Motors’ Electro-Motive Division. Final assembly was at GM-EMD's La Grange, Illinois plant. A total of 1,111 cab-equipped lead A units and 696 cabless booster B units were built. The F3 was the third model in GM-EMD's highly successful F-unit series of cab unit diesel locomotives, and it was the second most produced of the series. The F3 essentially differed from the EMD F2 in that it used the “new” D12 generator to produce more power and from the later EMD F7 in electrical equipment. Some late-model F3's had the same D27 traction motors, along with the heavier-duty electrical cables, used in the F7, and were referred to as model F5 by EMD's Engineering Department. Engine and powertrain The F3 used a 16-cylinder 567B series diesel engine developing at 800 rpm. The 567 was designed specifically for railroad locomotives, a mechanically ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
EMD DD35A
The EMD DD35A, also known as the EMD DDA35, was a diesel-electric locomotive of D-D wheel arrangement built by General Motors Electro-Motive Division exclusively for the Union Pacific Railroad. They were a cab-equipped variant of the previous, cabless booster (B unit) EMD DD35 (sometimes erroneously called the 'DD35B'). Fifteen DD35A locomotives were built between May and July 1965; they were assigned road numbers 70 through 84. This request also led to the introduction of the ALCO Century 855 and GE U50. A further development of the 8 axle, twin-engined locomotive produced the final, best known type, the DDA40X "Centennial". History Like its cabless predecessor, the DD35A was essentially two EMD GP35 locomotives on a common frame, riding on a pair of 4-axle Flexicoil trucks. The cab of a GP35 was fitted to the front end, requiring a longer frame than the DD35; the fuel tank beneath was lengthened, and the center pass-through walkway was offset a little to the rear because of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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