This tweet shows the image below and says:
Soyuz rocket on its way to the launch pad (on a train of course).
Question: Does this Soyuz vehicle (a train engine) burn coal or oil? Does it have an official name?
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This is a diesel-electric locomotive TEM-2.
The more powerful modification of TEM-1 diesel locomotives. In turn, TEM-1 locomotive is developed on the basis of TE-1 locomotives. The TE-1 is soviet copy of American Locomotive Company RSD-1. https://en.wikipedia.org/wiki/ALCO_RSD-1
Does it have an official name?