The EMD F9 is a diesel-electric locomotive built by the Electro-Motive Division of General Motors from 1954 to 1960. It is part of the F-series and features a powerful 1,500 horsepower engine, making it suitable for both freight and passenger services. The F9 was known for its reliability and efficiency, contributing to the transition from steam to diesel power in the rail industry. With a distinctive streamlined design, the F9 became popular among various railroads in North America. It could be operated in multiple-unit configurations, allowing for greater flexibility in train operations. The locomotive remains a favorite among rail enthusiasts and collectors today.