The Alco FA is a type of diesel-electric locomotive built by the American Locomotive Company (ALCO) from the late 1940s to the early 1950s. Designed for freight and passenger service, it features a distinctive streamlined body and was available in various horsepower ratings, typically ranging from 1,500 to 2,000. The FA series was popular among railroads for its reliability and efficiency. These locomotives were equipped with a powerful diesel engine and an electric generator, allowing them to pull heavy loads over long distances. The Alco FA was widely used across North America and contributed significantly to the transition from steam to diesel power in the railway industry.