Okay, an engineering post, and we’ll see how far that research takes me.
A fire might not be so bad, especially since I consider a character who would choose those methods of solving problems also that one character who always start fires. Of all kinds.
That was actually the fuel they’re burning. The not-water they’re using for the steam is another magical substance, a sort of rainbow-hued liquid that I pictured with a lower boiling point than water, thus allowing the machine to use less fuel to create the steam. It’d also cause less heat related stress on this old model of steam engine. It’s stable and nontoxic, with good heat transfer properties via convection …unlike the will-'o-the-wisp extract. (:0 If you choose to be the engineer, you’ll find that the previous engineer quit abruptly and left a lot of ‘experimental’ equipment laying about - hence this first little disaster the MC discovers so abruptly.
I did go ahead and change the wording a little bit when you’re looking at the machine, trying to emphasize which is fuel, and which is working fluid (that’d be the stuff behind the sight-glass). I’m hoping that will make it more clear which is the working fluid and which is the fuel for the boiler. Those changes will go up on my next update, in a few days.
This machine is just a low-powered steam press, used for pressing sheets of dough, pastry, so forth…so it really doesn’t need to be particularly high powered, I would think, just non-toxic in its emissions, or at least well vented, and preferably reliable. The technology is generally borrowed from in and around the Edwardian era, so this steam engine is a simple reciprocating single-action machine linked to an equally simple press.
I can definitely think of some applications for a machine that is geared towards raw power rather than conservation and basic bakery tasks, though. I was looking into various experiments using mercury as a working fluid, for exactly the reasons you’re mentioning. The problems were apparently heat transfer, toxicity, and expense. If there was a substance that solved at least two of those problems…hmm, interesting thoughts! Thank you.
Now, to think through why a start-up, Edwardian tech bakery might want an extremely powerful steam engine. Of course, there’s always the classic answer… to TAKE OVER THE WORLD. Anyway. We’ll see.