6 cylinder radial ‘steam’ engine 3d printed, with some metal parts and inserts. It’s a work in progress, no instructions yet so its like a 3d puzzle of an engine! I will post some exploded view diagrams of the parts order of assembly soon. It still needs the cylinder piston sleeves figured out… no compression as it is now.
I like it.
Any possibility that you’d use the plastic parts as investments in a casting?
That little engine will make a lot more torque if you can put hotter steam into it.
Yes you probably could do that. Its a 3d model of a ‘Potty 3 cylinder radial steam engine’, modified for 6 cylinders and 3d printing. I have already machined it in steel and aluminum from common rod and bar sizes as a 3 cylinder, even with mill and lathe accuracy and very good compression it’s not something built for driving a mechanism with much torque its just a model of a proposed radial steam engine, I am not sure this design was ever even used for anything in an industrial capacity. On my metal model I bent the offset on the crank shaft running it way to fast showing it off to some people, still runs on a breath but a slight wobble now with any kind of high pressure. The size of everything especially the rods and offset shaft make it just a model, not a real engine. Harder shafts of drill rod maybe, I leave that god awful task of cutting that stuff to someone else!
‘steam’ not steam, i.e. DO NOT EVER USE STEAM AS A POWER SOURCE FOR ANYTHING OTHER THAN COOKING WITHOUT PROFESSIONAL HELP!!!
Seriously, WTF are people kidding me? I posted on thingiverse and got the same trolling remarks that demand a disclaimer.
COMPRESSED AIR ONLY IN MODEL ‘STEAM’ ENGINES UNLESS YOU SERIOUSLY KNOW WHAT YOU ARE DOING!
I hate posting anything sometimes in the trollnet 
@AlohaMilton some of the remarks are trolling, some are people legitimately worried that actual steam might get used… Boiler explosions are no laughing matter.
@AlohaMilton
I figure if you’re smart enough to get a steam engine built and running, you’re smart enough to know that steam is dangerous.
I doubt you need to be reminded that a flywheel will skin your ass either.
My Dad got caught in a boiler explosion in Puerto Rico.
He got some shrapnel in his arm, and was very pissed off about it.
He had been called in to find out why it had become so inefficient, and had not gotten his luggage out of his taxi when the boiler went off.
They were trying to boost the output by adding heat when the problem was that it was scaled up damn near solid inside the heat exchange tubes.
So,…
Be careful with that.