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The Dash 8 Series is a line of diesel-electric freight locomotives built by GE Transportation. It replaced the Dash 7 Series in the mid-1980s, and was superseded by the Dash 9 Series for freight usage and the Genesis Series for passenger usage in the mid-1990s.
All models of the Dash 8 Series are powered by a 16- or 12-cylinder, turbocharged, GE 7FDL 4-stroke diesel engine.
The design of the Dash 8 Series is based upon that of the Dash 7 Series. The biggest changes introduced during the production of the Dash 8 Series were the first use of a microprocessor-equipped engine control unit in a diesel locomotive, and the adoption of a modular system in the construction of the vehicle body.
The Dash 8 locomotive bodies were assembled from several modules, creating a combination to fit the length of the chassis. On models with a traditional narrow short hood, the part of the equipment room immediately behind the cab is taller than the top of the rounded cab roof, giving those models a distinctive appearance. On all models, that part of the equipment room houses the cooling fans for the dynamic braking system.
Traction motors of Dash 8 locomotives were powered by direct current.
The Dash 8 prototype was completed in 1984. Manufacture of the improved production units started in earnest in 1987. Early versions of the Dash 8 were manufactured on the Dash 7 production line, but their general appearance was different. The Dash 8-40C, introduced in 1987, featured improved reliability.
The naming of the Dash 8 Series, and that of its various models, corresponded initially with that of its predecessor, the Dash 7. So, for example, "B32-8" designated a B-B configured 3,200 hp (2,390 kW) Dash 8 Series locomotive.
After product improvements were made to the line in 1987, the official designations for models in this series changed to "Dash 8...", as shown below. However, for simplicity many railroads decided to use designations which follow the pattern of the Dash 7 line. For example, the Dash 8-40C is usually rendered as "C40-8".
The "W" suffix used for some models indicates the then-optional wide-nose "North American" safety cab.
Specifications common to all Dash 8 Series four axle models are as follows:
This model was manufactured between 1984 and 1989, with 49 examples of the model built for North American railroads. All but 4 of these units were ordered by Norfolk Southern. The others were 3 units ordered by Burlington Northern Railroad, and a GE demonstrator unit.
This model, a one-off, was the original Dash 8 prototype, built in 1983.
A total of 145 examples of this model were manufactured from 1984. Its external appearance is almost the same as that of the later Dash 8-40B model, with the obvious exception of the trucks.
The first three Dash 8-39Bs were built for Atchison, Topeka and Santa Fe Railway (ATSF). A fourth example of the model, a GE demonstrator designated as a Dash 8-39BE (or B39-8E), was converted from the original Dash 8 prototype.
There were also two much larger groups of this model: 102 Dash 8-39BEs were fabricated for Locomotive Management Services (Reporting mark: LMX) and placed on long term lease to Burlington Northern Railroad.
The remaining 40 were built for the Southern Pacific Railroad.
In 1988 and 1989, a total of 150 units of this model were produced.
Substantial orders for the model came from ATSF (40 units), Conrail (30 units), New York, Susquehanna and Western Railway (24 units), and the model's biggest customer, St. Louis Southwestern Railway (54 units).
There were also small orders from Providence and Worcester Railroad (4 units), the United States Department of Energy (Savannah River Site), and a GE demonstrator unit.
Eighty three examples of this model were built for ATSF in the early 1990s. ATSF was the only railroad to order it. There was also one GE prototype and testbed, rebuilt from the prototype B39-8E.
The "W" suffix to this model's name indicates that it differs from the B40-8 in having a "wide nose" safety cab.
GE was almost commissioned by ATSF to make a B unit (cabless booster unit) version of this model, but because the price would have been the same for B40-8Ws with cabs or without, ATSF decided to order units with cabs only.
All of ATSF's B40-8Ws became part of BNSF, and many were later reliveried into one of BNSF's liveries.
Some have since been sold to other operators.
A total of 20 units of this type were built, with the last units being delivered in December 1991. All were built specifically for Amtrak and numbered 500 through 519. They were nicknamed "Pepsi Cans" and "Hockey Sticks" by many railfans, due to being originally painted in a wide-striped red, white, and blue livery. Since the most recent overhaul, however, the locomotives now have the current Phase V blue-silver livery with the current "wave" logo.
They were also the first locomotives that Amtrak purchased to replace the EMD F40PH before the introduction of the GE Genesis series locomotives in 1993. The fleet has since been primarily relegated to yard switching (mainly in Los Angeles, Oakland, Chicago, and Miami), but locomotives are sometimes called upon to pull mainline trains when a locomotive from Amtrak's fleet of GE Genesis and Siemens Charger units are unavailable.
Two of the units, Amtrak numbers #501 and #502, were sold to the California Department of Transportation (CDTX) In 1994. The locomotives were renumbered #2051 and #2052, and received the Amtrak California paint scheme. They are currently being used on the State-Supported San Joaquin and Capital Corridor trains.
Specifications common to all Dash 8 Series six axle models, except where stated, are as follows:
This was one of the earliest models in the Dash 8 Series. Only 10 of the model were built, in 1984. All of them were delivered to Conrail.
Initially, these units were painted in Conrail's standard blue livery. In 1997, Conrail assigned all 10 of them to "Ballast Express" service, and they were repainted into a gray version of the Quality scheme.
One C32-8 was eventually bought by Brasil Ferrovias (BF), after being retired by Conrail. However, this unit developed problems with its electronics, and was therefore decommissioned to supply parts for the mechanically similar C30-7As operated on the Cutralle–Quintela railroad.
Between 1984 and 1987, a total of 161 examples of this model were produced for two North American railroads: Norfolk Southern and Conrail.
An initial batch of 114 of the standard version of this model was built for Norfolk Southern, which then ordered a batch of 25 examples of the C39-8E (Enhanced) model, with a carbody similar to that of the C40-8.
Conrail ordered 22 of the standard version. After the Conrail split in 1999, 13 units of this order went to Norfolk Southern and the remaining 9 units went to CSX.
This was the first model of any locomotive series to be fitted with microprocessor-equipped engine control units. A total of 581 examples of the model were manufactured between 1987 and 1992.
The C40-8 has a traditional narrow short hood, but otherwise its external appearance is almost the same as that of the later Dash 8-40CW model.
The most important customer for this model was UP, which ordered 257 of them.
Other large orders for the model came from Chicago and North Western Transportation Company (77 units), Conrail (25), CSX (147) and Norfolk Southern (75).
The remaining four units were supplied to Estrada de Ferro Carajás of Brazil.
Mechanically identical to the Dash 8-40C (see above) and Dash 8-40CW (see below), this model was constructed between 1990 and 1994 only for Canadian railways, with a production total of 84 units.
The model is distinguished from the Dash 8-40CW by the addition of a full-width cowl body and the use of a Canada-specific nose and windshield configuration.
BC Rail ordered 26 examples of the model, Canadian National ordered 55, and Quebec North Shore and Labrador Railway acquired the remaining three.
Early versions of this model differ from the Dash 8-40C only in having a "wide" or "safety" cab. A total of 756 examples of the model were built, with the first being delivered to Union Pacific in 1990.
The C40-8W was continuously upgraded over the course of its production. Later model Conrail units were built with split cooling systems for the turbocharger intercooler and engine cooling (previous Dash 8 series had both on the same cooling system).
The units delivered to Conrail in 1993 and 1994 were equipped with GE's Integrated Function Displays (IFD).
Some of the C40-8Ws operated by Conrail were lease units owned by LMSX. The other railroads that operated C40-8Ws as original owners were ATSF, CSX, and Union Pacific.
This model is a variation of the C40-8W with the same 16-cylinder engine uprated to 4,135 hp (3,080 kW).
A total of 154 C41-8Ws were produced between 1993 and 1994 for both UP and ATSF.
Some Dash 8-40CW units were similarly uprated to Dash 8-41CW standard by the railroads.
A total of 53 examples of this model were built in 1993–1994, all of them for CSX numbered 9000-9052. This was the preproduction version of the Dash 9 series containing its innards but having an extended Dash 8 carbody (with the exception of the first three locomotives). They were all derated to 4000 hp.
The GE Genesis is a series of passenger diesel locomotives built by GE Transportation for Amtrak, Metro-North, and Via Rail between 1992 and 2001. A total of 321 units were produced.
The EMD GP30 is a 2,250 hp (1,680 kW) four-axle diesel-electric locomotive built by General Motors Electro-Motive Division of La Grange, Illinois between July 1961 and November 1963. A total of 948 units were built for railroads in the United States and Canada, including 40 cabless B units for the Union Pacific Railroad.
The ALCO HH series was an early set of diesel switcher locomotives built by the American Locomotive Company (ALCO) of Schenectady, New York between 1931 and 1940, when they were replaced by the S series: the 660 hp (490 kW) S-1 and 1,000 hp (750 kW) S-2. They were ALCO's first diesel switchers to enter true series production, and among the first land vehicles anywhere to use the revolutionary diesel-electric power transmission.
The GE C44-9W is a 4,400 hp (3,281 kW) diesel-electric locomotive built by GE Transportation Systems of Erie, Pennsylvania. Keeping in tradition with GE's locomotive series nicknames beginning with the "Dash 7" of the 1970s, the C44-9W was dubbed the Dash 9 upon its debut in 1993.
The EMD SD50 is a 3,500-horsepower (2,610 kW) diesel-electric locomotive built by General Motors Electro-Motive Division. It was introduced in May 1981 as part of EMD's "50 Series"; production ceased in January 1986. The SD50 was a transitional model between EMD's Dash 2 series which was produced throughout the 1970s and the microprocessor-equipped SD60 and SD70 locomotives. A total of 431 were built.
The GE C40-8 is a model of 6-axle diesel-electric locomotive built by GE Transportation Systems between 1987 and 1992. It is part of the GE Dash 8 Series of freight locomotives, and its wheel arrangement is of a C-C type.
The GE Dash 8-32B is a 4-axle 3,150 hp (2,350 kW) diesel-electric locomotive built by GE Transportation between 1984 and 1989. It is part of the GE Dash 8 Series of freight locomotives.
The GE Dash 8-40B is a 4-axle diesel-electric locomotive built by GE Transportation between 1988 and 1989. It is part of the GE Dash 8 Series of freight locomotives.
The GE C39-8 is a 6-axle diesel-electric locomotive model built by GE Transportation Systems between 1984 and 1987. It is part of the GE Dash 8 Series of freight locomotives.
The GE Dash 9-40CW is a 4,000-horsepower (3,000 kW) diesel-electric locomotive built by GE Transportation Systems of Erie, Pennsylvania, between January 1996 and December 2004. 1,090 were built for Norfolk Southern Railway, as road numbers 8889 to 9978. 53 GE Dash 8-44CWs built to Dash 9 specifications were also built for CSX Transportation, carrying road numbers 9000 to 9052.
The GE Dash 8-40BW, or B40-8W, is a four-axle diesel locomotive built by GE Transportation for the Atchison, Topeka and Santa Fe Railway (ATSF) in the late 1980s and the early 1990s. It is part of the GE Dash 8 Series of freight locomotives.
The GE C40-8W is a 6-axle diesel-electric locomotive built by GE Transportation Systems from 1989 to 1994. Often referred to as the Dash light series, it is part of the GE Dash 8 Series of freight locomotives. This locomotive model is distinguished from the predecessor Dash 8-40C by the addition of a newer "wide" or "safety" cab. A cowl-bodied version of this locomotive, built only for the Canadian market, was the GE Dash 8-40CM.
The GE Dash 9-40C, also called a C40-9, was a 4,000-horsepower (3,000 kW) diesel locomotive that was built by GE Transportation Systems of Erie, Pennsylvania, between January 1995 and March 1995. The C40-9 was equipped with the 16-cylinder 7FDL-16 prime mover which is rated at a lower power than the 4,400 hp (3,300 kW) GE Dash 9-44CW that debuted a year earlier in 1994. It featured GE's direct current B13B traction motors.
The GE C40-8M is a 6-axle diesel locomotive built by GE Transportation Systems from 1990 to 1994. It is part of the GE Dash 8 Series of freight locomotives, and is often referred to as a Dash 8-40CM.
The GE U26C diesel locomotive model was introduced by GE Transportation Systems in 1971. All examples of this model are six axle units, and have the wheel arrangement C-C or Co'Co'.
The Dash 9 Series is a line of diesel locomotives built by GE Transportation. It replaced the Dash 8 Series in the mid-1990s, and was superseded by the Evolution Series in the mid-2000s. Dash 9 series locomotives are some of the most common in the United States.
The Dash 7 Series is a line of diesel-electric freight locomotives built by GE Transportation. It replaced the Universal Series in the mid-1970s, and was superseded by the Dash 8 Series in the mid-1980s.
The GE Dash 8.5-40CW was a 6-axle a 4,000 hp (2,800 kW) diesel-electric locomotive originally built by GE Transportation Systems, rebuilt by Norfolk Southern at its shops in Roanoke, VA. The first locomotive started rebuild 2012, with eleven more being rebuilt until 2016.
The GE AC44C6M is an AC-traction 4,400-horsepower (3,300 kW) diesel locomotive, rebuilt from GE Transportation Dash 9 locomotives. AC44C6M rebuilds have been done by GE, American Motive Power, Inc., and Norfolk Southern Railway's Juniata and Roanoke Shops, starting in September 2015. The AC44C6M retains the 16-cylinder 7FDL-16 prime mover used in the core locomotive prior to rebuilding, but replaces the Dash 9's DC traction motors with alternating current GE 5GEB13B7 traction motors. Externally, the rebuilds have received new wide-nosed cabs, a new front hood section, and a new inverter cabinet behind the cab, while retaining the underframe and engine and radiator compartments of the original Dash 9 units.