Technical Data
SM31 is a Co-Co locomotive, what means it runs on two bogies, each equipped with three axles. Bogies are similar in construction to those used in SU45 and SU46 locomotives. This gives SM31 locomotive good performance on highland tracks. Being a typical shunter, SM31 has one crew compartment of the same height as machine and electric compartments. The engine (V8 compression-ignition engine) is in fact a developed version of SM42 locomotive engine, with its total power raised by ca. 50%. The engine propels main alternator, which gives power to six 196 kW traction motors.
Read more about this topic: PKP Class SM31
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