The ES40DC, ES44DC, ES44AC, and the newest, ES44C4 are part of the new
General Electric Evolution Series of diesel locomotives. Since the late
1980s GE was able to grab the lead from Electro-Motive Diesel (then
part of GM's Electro-Motive Division) and the company truly cemented
itself in first place during the 1990s with highly successful designs
such as the C40-8/W, C44-9W, C40-9W, and the AC4400CW. Combined these
units literally several thousand examples.
Today's Evolution models simply followed the builder’s Dash 9s and
were designed to offer just as much horsepower as conventional diesels
but by burning much less fuel and in turn producing fewer emissions.
For the first several years of cataloging Evolutions GE offered them in
only two models, the ES44DC and ES44AC, save for the special ordered and
de-rated ES40DC. However, just recently the company unveiled more an
"old school" design, the A1A-A1A ES44C4. Currently, only one railroad
has purchased this model.
Electric Evolution Series was designed to meet the EPA’s Tier 2
requirement of emissions standards and is powered by a GEVO 12-cylinder
prime mover. This new engine was
the first complete redesign of a GE diesel dating all of the way back
to the Universal series of the 1960s and 1970s. Since that time the
company's locomotives had a featured an FDL prime mover, upgraded over
the years to include more horsepower and improve efficiency. Normally,
unless special ordered, GE's locomotives came equipped with 16-cylinder
engines. However, as a way to meet the EPA's requirements, the company
is now able to achieve the same horsepower rating of 4,000-4,400 (such
as what was found in the C44-9W and AC4400CW) using just 12-cylinders.
The models General Electric has introduced using this power plant are
quite similar to the models they replaced save for this one difference.
ES40DC: Rated at 4,000 horsepower using DC traction this
model replaced the C40-9W model (also rated at 4,000 hp using DC
traction). The C40-9W was a special request by NS wishing
to have a locomotive that offered just slightly less horsepower than
the standard design. NS began taking delivery of this design with a
standard cab in 1995 known as the C40-9. A year later it began
acquiring the wide cab version and altogether wound up with more than
1,200 by the time GE ended production in 2004. As of today, NS owns a little over 200 ES40DCs. The locomotive uses GE's latest traction motor, the model 752AH that can produce 142,000 pounds of starting tractive effort and 109,000 pounds continuous.
ES44DC: Rated at 4,400 hp using DC traction this model
replaced the C44-9W model (also rated at 4,400 hp using DC traction).
The C44-9W was a very popular locomotive cataloged between 1994 and
2004. It purchased by several roads like the SP,
Chicago & North Western and CN. However, the BNSF found the model most suitable, purchasing more than 1,600 examples. Today's ES44DC has been purchased by BNSF, CSX, and CN which total around 1,100+ examples.
Once again, BNSF has been the largest buyer picking up nearly 850
units. The locomotive is virtually identical to the above ES40DC save
for its increased horsepower using the now standard 4-cycle and
12-cylinder GEVO prime mover.
ES44AC: Rated at 4,400 hp using AC traction this model
replaced the AC4400CW (also rated at 4,400 hp using AC traction). The
AC4400CW proved to be General Electric's most popular current day
locomotive, selling nearly 2,600 examples to nearly every Class I in the country.
Railroads came to love the locomotive's incredible tractive effort
for use in heavy drag service. Additionally, GE's models have become
well liked for their reliability and ability to take a beating in main
Apparently, the success of the AC4400CW has carried over to the
ES44AC as it is currently GE's best selling locomotive in production.
Internally, the locomotive is quite similar to its direct current counterparts using a 12-cylinder GEVO prime mover and model B13B2B traction motors.
However, it offers much more tractive effort; 183,000 pounds starting
and 166,000 continuous. To date, the standard ES44AC (which CSX labels
as ES44ACHs due to their high tractive effort) has sold nearly 2,300 examples, including its variant the ES44ACi (for Kazakhstan Temir Zholy and Mongolia National Railways).
Thus far the ES44AC has sold to Arcelor Mittal, CSX, CP,
Cemex, BNSF, Ferromex, Iowa Interstate, Kansas City Southern de Mexico,
NS and UP. It should also be noted that other
variants of GE's Evolution Series include the ES44DCi for Rio Tinto
(Australia), ES40ACi for Egyptian National Railways and MPRI of Egypt,
ES40ACdbi for Libyan Arab Railway, ES58ACi for the Carajas Railroad
Brazil, and the ES59ACi for the Chinese National Railways. All model of
the General Electric Evolution Series are C-C designs (six axles) and
so far appear to be selling quite well for GE, even a regional carrier
as placed an order for the ES44AC model.
ES40DC Production Roster
ES44DC Production Roster
ES44AC Production Roster
Arcelor Mittal (Cartier Railway)
Ferrocarril del Sureste
General Electric (Demo)
Kansas City Southern
5248-5553, 5695-5699, 7345-7529, 7600-8051
ES44C4 Production Roster
6508-6689, 6790-6889, 6900-7182
Florida East Coast
Not Yet Known
ES44C4: The latest design offered by GE, or perhaps just
an experimental model, depending on how one may interpret it. Thus
far, only BNSF has purchased this locomotive, 48 units in all. The
design uses an A1A-A1A truck setup, meaning that the center axle is not
powered. It is a type of locomotive that has not been offered for
decades although locomotives like EMD's E series and the American
Locomotive Company's PA model regularly used the setup. It was also
offered in a few first generation freight road switchers but the design
most all but abandoned by the time second-generation models began
entering production in the 1960s. The ES44C4 featuring AC traction
motors featuring 4,400 horsepower using GE's latest model GE B13B2B
traction motor. At this time, the tractive effort ratings are unknown
although with two less traction motors it is obviously rated below the