Its the 14th century and you’ve had no time to prepare, after you’re done reading this post you are snapped. What do you do?
You’d need metallurgy which was only invented in the process of building bigger naval guns, much later.
The issue was pressurizing the steam, which wasn’t possible in the middle ages. You had no rubber for seals, no steel that would hold, and no tools to drill holes precisely enough.
That’s why the Romans already used steam for simple parlor tricks but it couldn’t be made to do actual work until the modern eraReal science and innovation comes in increments
no rubber for seals
Modern synthetic rubber would indeed be unavailable, but I vaguely recall reading something to the effect that early steam engines used leather seals or something like that.
But yeah, there’s a lot of missing prerequisites for machinery. Even simple rotary power – like from a windmill or waterwheel – would suffer from being incapable of long distance transmission. Such a limit means the interior lands of a country away from a river or coast would remain unusable for development beyond basic agriculture. No railroads, no A/C, no Phoenix Arizona.
