It doesn’t run on steam, sadly.
This paper steam engine is based on his cad drawing of a Riches and Watts nominal 2 ½ horsepower vertical A-frame double acting simple slide-valve steam engine circa 1870-75. The original engine was used to drive a water pump to irrigate the fields of Norfolk. If this model had a scale, it would be roughly 1:19. I had to double the size of the eccentric and strap in order to make it buildable. Everything else is close to scale, but changed in design and apprearance because, well, paper isn’t iron.
Everything will work on this engine, the flywheel turns, there really is a slide valve in the valve chest, the piston works, the cranks and the connecting rods, eccentric and strap all work if built carefully.
I figured the teacherly types and engine geeks here will find this interesting.
Their link to the actual file’s broken, but it’s pretty neat, nonetheless. Reminds me of a book I’ve got somewhere in the garage, that once cut apart, folded and glued, will produce a working paper clock.