[pengaru]

> I hope they are burning coal to produce the steam to go full steampunk.

That's a commercial off-the-shelf hobbyist steam engine, they prescribe using smokeless fuel tablets like [0].

Coal would just make a bunch of soot and a big mess in general.

[0] https://www.amazon.com/Esbit-1300-Degree-Smokeless-Tablets-E...