The GE Evolution Series (GEVO Locomotives)

The GE Evolution Series is a line of diesel-electric locomotives built by GE Transportation, a division of General Electric. These locomotives are among the most advanced and powerful on the market, and they have been designed to meet the demands of modern freight railroads. Here is a detailed exposition of the GE Evolution Series.


The GE Evolution Series was first introduced in 2005 and represented a major leap forward in locomotive technology. These locomotives were designed to meet the US EPA’s Tier 2 emissions standards, which required a significant reduction in emissions compared to previous locomotive models. The Evolution Series was also designed to be more fuel-efficient and reliable than previous locomotives.


The GE Evolution Series is available in two versions: the ES44AC and the ES44DC. The ES44AC is an AC-traction locomotive, while the ES44DC is a DC-traction locomotive. Both versions feature GE’s trademark AC or DC traction technology, which provides superior tractive effort and acceleration.

The Evolution Series also features a state-of-the-art microprocessor-based control system that manages engine performance, emissions, and fuel efficiency. The locomotive’s engine is a GEVO (General Electric Evolution) engine, which is a four-stroke diesel engine that is turbocharged and intercooled. The GEVO engine is known for its fuel efficiency and low emissions.

The locomotive’s cab is designed to provide a comfortable and safe environment for the crew. The cab features ergonomic controls, air conditioning, and an advanced audio system that allows the crew to communicate with each other and with the outside world.


The GE Evolution Series is one of the most powerful locomotives on the market today. The ES44AC has a maximum horsepower of 4,400, while the ES44DC has a maximum horsepower of 4,000. These locomotives are designed to handle heavy freight trains and are capable of reaching speeds of up to 75 miles per hour.

The Evolution Series is also known for its fuel efficiency. These locomotives are designed to consume less fuel than previous locomotive models, which helps reduce the operating costs of railroads. The locomotives are also designed to meet the EPA’s emissions standards, which helps reduce the environmental impact of rail transport.

The GE Evolution Series is a testament to GE Transportation’s commitment to innovation and technological advancement. These locomotives represent a significant leap forward in terms of performance, fuel efficiency, and emissions reduction. They are among the most advanced and powerful locomotives on the market and are capable of handling the demands of modern freight railroads. For railfans, the GE Evolution Series is a fascinating and impressive sight to behold.

UP GEVO Locomotive

Union Pacific’s GE C45ACCTE

Union Pacific’s GE C45ACCTE, commonly known as the “Tier 4” locomotive, is an impressive piece of engineering that has helped to revolutionize the rail industry. In this blog post, we will explore the features of the C45ACCTE fleet, as well as their history and significance for railfans.

Tier 4

The C45ACCTE fleet was first introduced by Union Pacific in 2015 as a replacement for older locomotives. These Tier 4 locomotives are designed to meet stricter emissions standards set by the Environmental Protection Agency (EPA) in 2015, making them more fuel-efficient and environmentally friendly. This new fleet was manufactured by General Electric and includes a range of features that make them more powerful and efficient than their predecessors.

AC Traction System

One of the standout features of the C45ACCTE is its AC traction system. This system allows for faster acceleration and better overall performance. The locomotive is powered by a 16-cylinder GEVO engine, which produces up to 4,400 horsepower. The locomotive also has a maximum speed of 75 miles per hour.

Another key feature of the C45ACCTE is its advanced emissions control system. This system uses selective catalytic reduction technology to reduce emissions of nitrogen oxides (NOx), a major contributor to air pollution. The locomotive’s emissions control system is so effective that it meets Tier 4 emissions standards without the need for aftertreatment devices such as diesel particulate filters or urea injection systems.


The C45ACCTE is also designed for operator comfort and safety. The locomotive has a spacious cab with ergonomic controls and a comfortable seat. The cab is also equipped with an advanced electronic system that provides the operator with real-time performance data and diagnostic information.

For railfans, the C45ACCTE is a fascinating locomotive to watch in action. Its sleek, modern design and powerful performance make it a popular subject for railfan photography and videos. The locomotive’s distinctive “wing” profile and distinctive Union Pacific paint scheme make it easily identifiable on the rails.

The C45ACCTE is an impressive locomotive that represents a major leap forward in the rail industry. Its advanced technology, powerful performance, and environmental friendliness make it a favorite among railfans and an important asset for Union Pacific’s freight operations.