I've been giving some thought to trying my hand at making one of those little oscillating steam engines with the vertical column. I should mention that I'm not 'into' steam engines - it's more about seeing if my fledgling machining skills have reached a point where I can make something machine-like rather than the 'bits' I've done so far (like simple tools and gadgets).
I've been looking at a few plans culled from the internet and I think I see the principle of operation. Are there any gotchas that I should be aware of? One thing I'm not sure about is choice of metals - I want to run it from real steam which makes me wonder about the metals used in the piston and cylinder. I'd like to make both from brass - would there be a potential problem with thermal expansion?
Another is how to go about making a pressure regulator/relief thingy. My thoughts on this are to make somethng like a carburetor needle valve - a screw with a tapered pin that I can adjust manually. I believe I'm right in thinking that the resulting pressure is a function of the setting of the screw and the heat that's input. I've had a go at making something and used an MT2 taper, since the compound was set for that already. Would that work?
-- Wally