sand ermine
It's a cool contraption but I have no idea how it actually works. This is where references, links and how it works videos could be placed. Combustion makes me think of a car engine that relies of micro explosions to move the gears. I don't think you're meant to feed it TNT or black powder right?
glacial halo
That's a fireless locomotive
It's just a storage tank for steam
Gets filled up and then runs on that
sand ermine
oh, that's easy, like a refillable gas bottle but steam instead
sterile steppe
an actual one would have significantly more steam to work with but you can try it out with the steamers we do have by just letting the fire go out