SD45s

The EMD SD45 is a 3,600 horsepower (2,680 kW) six-axle diesel-electric locomotive built by General Motors Electro-Motive Division (EMD) between 1965 and 1972. It was primarily designed for heavy-duty freight service. The SD45 was a popular model, with over 1,200 units constructed for numerous railroads in North America. Its distinguishing feature was the powerful 20-cylinder 645E3 prime mover, EMD's largest diesel engine at the time. This engine provided excellent tractive effort, making the SD45 well-suited for mountainous terrain and heavy trains. Visually, the SD45 is recognizable by its long hood, dynamic brake blisters, and the distinctive flared radiators at the rear. Many SD45s featured a high-speed truck option, further enhancing their versatility. Over the years, many railroads rebuilt their SD45 fleets, often with upgraded engines and components, leading to designations like SD45-2 or SD45R. While many have been retired, some SD45s continue to operate in industrial settings or for smaller short-line railroads. The SD45 remains a significant locomotive in American railroad history, known for its power and endurance.