RS-2 Diesel Locomotive

Prototype Information

ALCO introduced the RS-2 in 1946 as a versatile 1,500-horsepower road-switcher designed for both freight and light passenger service. Powered by ALCO’s 244 diesel engine and featuring a B-B wheel arrangement, the RS-2 offered railroads the flexibility to handle mainline runs as well as switching duties in yards.

Major North American railroads, including the New York Central, Delaware & Hudson, and Pennsylvania Railroad, adopted the RS-2 for its reliability, rugged construction, and ease of maintenance. Its design helped establish the road-switcher concept, blending the power of a road locomotive with the maneuverability of a switcher.

The RS-2’s success paved the way for ALCO’s later RS-series models, including the RS-3, solidifying ALCO’s role in the diesel transition era.