and unexpectedly provide engine upgrades for existing classes. The fact it’s technically a steam locomotive is incidental.

The biofuel is being used to continually maintain the steam locomotive engine’s fire, which then protects their boilers. As much as 530 tons of coal was poured into three steam engines last year ...

The decades-long effort to advance the design and technology of steam locomotives constantly circled back to the idea of "make it bigger." Articulated engines took that notion and doubled it both ...