About the Southern Pacific GS-3 | GS-4: The GS-3 was a streamlined 4-8-4 Northern type steam locomotive that served the Southern Pacific Company from 1938 to 1957. They were built by Lima Locomotive Works and were numbered 4416 through 4429. GS stands for “Golden State” or “General Service.” They received the orange and red “Daylight” [...]
About the AC-12 Cab Forward: The best known example of the cab-forward design in the United States, the Southern Pacific Cab-Forward (also known to a lesser extent as “Cab-in-fronts” and “Cab-aheads”) placed the cab at the front by the simple expedient of turning the entire locomotive, minus the tender, by 180 degrees, an arrangement made [...]
About the Challenger: Built between 1936 and 1943, the Challengers were nearly 122 feet long and weighed more than one million pounds. Articulated like their big brother, the Union Pacific Big Boy, the Challengers had a 4-6-6-4 wheel arrangement. They operated over most of the Union Pacific system, primarily in freight service, but a few [...]
About the SD75I: The EMD SD75I is a diesel-electric locomotive produced by General Motors Electro-Motive Division (EMD). This unit is the same as the EMD SD75M, with 4,300 horsepower (3,200 kW), HTCR-II radial trucks and a 72 feet 4 inches (22.05 m) frame. The only difference between the two models is the cab. The “I” [...]