The EMD SD7 is a diesel-electric locomotive built by Electro-Motive Division (EMD) from 1953 to 1956. It features a powerful 1,500 horsepower engine and is designed for freight service. The SD7 is part of the SD series and is known for its reliability and efficiency on the railroads. With a length of approximately 60 feet, the SD7 can operate on various track conditions and is equipped with a unique B-B wheel arrangement. Over 1,200 units were produced, making it a significant model in the history of American railroading, widely used by many railroads across the United States.