GE/Wabtec "ET44AC" and "ET44C4" Locomotives: Data, Specs, Roster

Last revised: August 27, 2024

The ET44AC, along with the ET44C4, was General Electric's final production road-switcher before the transportation division was sold to Wabtec Freight in 2019.

This particular model was part of its Evolution Series, a stand alone variant aimed at meeting the Environmental Projection Agency's latest Tier IV emissions standards that went into affect on January 1, 2015.

GE had been successful in adapting its previous ES44AC to meet EPA's Tier III standards (January 1, 2012). This same locomotive was revolutionary when it debuted in 2003 to meet EPA's then Tier II standards (January 1, 2005).

While the company's new GEVO prime mover was up to the challenge, GE was still forced to make changes in meeting Tier IV demands. In addition, engineers had to redesign other aspects of the locomotive's radiator and internal components.

To date, there have been a few hundred examples of the ET44AC produced since it debuted in 2015. As of this writing Canadian National, CSX, Norfolk Southern, and Union Pacific have all purchased the model.

In addition, BNSF has acquired more than 200 examples of the ET44C4, the A1A-A1A variant first introduced in 2009 as the ES44C4.

Photos

CSX ET44AC #3378 leads an eastbound coal drag along the former Chesapeake & Ohio main line at Talcott, West Virginia. Loyd Lowry photo.

Background

Since the ET44AC remains in production, the information here may not be current. As such, it will be amended over time as the latest data is made available.

General Electric's 'Evolution Series' unofficially debuted in March, 2002 when testbed #2005 rolled out of Erie. This unit, which ushered in the builder's production model ES44AC of 2005, marked a new era in locomotive development.

The company spent hundreds of millions of dollars on development of a new prime mover to meet the EPA's then Tier II environmental emissions standards.

GE's rugged FDL prime mover, an engine with origins dating back to Copper Bessemer and the first U25B's of 1959, could no longer be refined without seriously degrading performance.

As a result, the all new GEVO power plant was unveiled and entered full scale production in December, 2002.

A group of eleven BNSF units, led by ET44C4 #3793, run light as they descend Cajon Pass in California. Loyd Lowry photo.

GE engineers were also forward-thinking in the GEVO's design, enabling it to meet future standards beyond Tier II. This proved important when Tier III standards went into effect in 2012 as the company only needed to implement minor internal improvements to its 'ES' models.

However, meeting more stringent Tier IV standards proved a problem. In his book, "Locomotives, The Modern Diesel & Electric Reference: 2nd Edition," Greg McDonnell notes the carbody had to incorporate several design changes.

For sharp-eyed railfans, the most noticeable difference between the ES44AC and ET44AC includes:

A larger rear flared radiator with a pronounced "V" appearance.

Inclusion of the horns just above the cab as well inset within the radiator at the rear. These had previously been located at the center of the carbody in one grouping, but GE needed this space for additional components.

The overall height of the cab was increased to 16 feet, 1 inch. As such, the ET44AC has reached its maximum possible height and still meet clearance restrictions, such as tunnels and overpasses.

With Wabtec Freight acquiring General Electric's transportation division in early 2019, the future of not only the locomotive production market but also that of GE-designed products is interesting.

GE had nearly limitless resources in developing technologically advanced models that had far surpassed EMD by the 1990s, such as the AC4400CW and C44-9W.

This continued with the Evolution Series in the early 2000s. It will be fascinating to see how Wabtec Freight navigates the locomotive market moving forward.

Data Sheet

ET44AC

Entered Production	8/24/2012 (General Electric #2015)
Years Produced	8/24/2012 - Present
GE Class	ES44TC
Engine	GEVO-12 Tier IV (12 cylinder)
Engine Builder	General Electric
Horsepower	4400
RPM	1050
Length	74' 6"
Height (Top Of Rail To Top Of Cab)	16' 1"
Width	9' 11"
Weight	426,000 - 432,000 Lbs
Fuel Capacity	5,000 Gallons
Air Compressor	3CDC (Westinghouse)
Air Brake Schedule	26L (Westinghouse)
Trucks	C-C
Truck Type	Hi-Ad Bolsterless Or Steerable (GE)
Truck Wheelbase	13' 2"
Wheel Size	42"
Traction Motors	GEB13 (6), GE
Traction Alternator	GMG205, GE
Auxiliary Alternator	GYA30A, GE
MU (Multiple-Unit)	Yes
Dynamic Brakes	Yes
Gear Ratio	83:20
Tractive Effort/Starting	183,000 Lbs
Tractive Effort/Continuous	166,000 Lbs at 13.7 mph
Top Speed	70 mph

ET44C4

Entered Production	4/2015 (BNSF #3911)
Years Produced	2015 - Present
GE Class	ES44C4
Engine	GEVO-12 Tier IV (12 cylinder)
Engine Builder	General Electric
Horsepower	4400
RPM	1050
Length	74' 6"
Height (Top Of Rail To Top Of Cab)	16' 1"
Width	9' 11"
Weight	416,000 Lbs
Fuel Capacity	5,000 Gallons
Air Compressor	3CDC (Westinghouse)
Air Brake Schedule	26L (Westinghouse)
Trucks	A1A-A1A
Truck Type	Hi-Ad Bolsterless (GE)
Truck Wheelbase	13' 2"
Wheel Size	42"
Traction Motors	GEB13 (4), GE
Traction Alternator	GMG205, GE
Auxiliary Alternator	GYA30A, GE
MU (Multiple-Unit)	Yes
Dynamic Brakes	Yes
Gear Ratio	83:20
Tractive Effort/Starting	183,000 Lbs
Tractive Effort/Continuous	166,000 Lbs at 13.7 mph
Top Speed	70 mph

Production Roster

ET44AC

Owner	Road Number	Serial Number	Order Number	Completion Date	Quantity
Canadian National	3121	62521	1810 (Ex-Demonstrator #2029)	2014	1
Canadian National	3122-3132	62525-62535	1834 (Ex-Demonstrators #2033-2043)	2014	11
Canadian National	3000-3038	63438-63477	1841	7/2015-9/2015	39
Union Pacific	2570-2669	63478-63577	1847	10/2015-12/2015	100
CSX Transportation	3250-3299	63578-63627	1845	10/2015-12/2015	50
CSX Transportation	3300-3374	63628-63702	1845	10/2015-12/2015	75
CSX Transportation	3375-3474	63703-63802	1850	1/2016-12/2016	100
Canadian National	3039-3120	63858-63945	1852	1/2016-8/2016	82
Norfolk Southern	3600-3646	64093-64139	1856	5/2016-6/2016	47
Union Pacific	2670-2764	64303-64397	1857	7/2016-10/2016	95
Norfolk Southern	3647-3680	64535-64568	-	1/2017-4/2017	34
Canadian National	3133-3162	64774-64803	-	10/2018-11/2018	30
Canadian National	3163-3172	65858-65867	-	11/2018-12/2018	10
Canadian National	3173-3222	65868-65917	-	1/2019-4/2019	50
Canadian National	3223-3232	66088-66097	-	1/2019-5/2019	10
Canadian National	3233-3242	66098-66107	-	1/2019-5/2019	10
Canadian National	3243-3285	66252-66294	-	12/2019-2/2020	43

Some lines, like CSX, denote their ET44AC as the "ET44AH," with the "H" referring to "Heavy" regarding its additional ballast.

ET44C4

Owner	Road Number	Serial Number	Order Number	Completion Date	Quantity
BNSF Railway	3911-3915	63164-63168	1843	4/2015	5
BNSF Railway	3916-3999	63169-63252	1843	4/2015-9/2015	84
BNSF Railway	3839-3910	63253-63324	1843	9/2015-11/2015	72
BNSF Railway	3764-3838	64015-64089	1849	2/2016-6/2016	75
BNSF Railway	3725-3763	64569-64607	-	3/2017-6/2017	39
BNSF Railway	3675-3724	66139-66188	-	11/2019-6/2020	50

Sources

McDonnell, Greg. Locomotives: The Modern Diesel & Electric Reference, 2nd Edition. Buffalo: Boston Mills Press/Firefly Books, 2015.

Solomon, Brian. GE and EMD Locomotives: The Illustrated History. Minneapolis: Voyageur Press, 2014.

McDonnell, Greg. U-boats. Toronto: Stoddart Publishing, 1994.

Union Pacific ET44AH #2639 leads Norfolk Southern's westbound priority intermodal 233 out of the Welch Tunnel and across the Tug Fork River at Welch, West Virginia. Loyd Lowry photo.

A1A-A1A Design

The ET44C4 was introduced alongside the ET44AC and to date, only BNSF has acquired the model. It was a return of the A1A-A1A wheel arrangement whereby the center axle is unpowered.

General Electric had first reintroduced the concept in the earlier ES44C4. BNSF was also the only buyer but wound up with some 1,137 examples.

What the company dubbed its Dynamic Weight Management System, Mr. McDonnell's book notes that "the computer redistributes the load from the unpowered center axles onto the powered 1, 3, 4, and 6 axles as demand warrants."