EMD GM10B

The EMD GM10B was an electric testbed locomotive with a power output of 10,000 horsepower, intended for high-speed freight on the Northeast Corridor. It was built by Electro-Motive Division at its La Grange, Illinois, plant in collaboration with ASEA of Sweden, entered service with Penn Central in August 1976 and had a B-B-B wheel arrangement, with a high proportion of Swedish components and design features. High oil prices in the mid 1970s had made large US railroads consider electrification, but oil prices then declined, interest vanished and the Penn Central bankruptcy split its electrified lines between Amtrak and Conrail. Conrail stopped electric operation in 1982, the two locomotives became surplus and were returned to EMD, and both were scrapped in the mid 1980s. EMD developed the similar C-C GM6C for slow drag freight at the same time.