Maxjon

Coffee machine steam pipe, now you got me thinking....

https://miniaturesteammodels.com/products/master I wonder if this boiler will run my engine build? 25 psi ?

I have some bronze bar stock, I think.i will use that for the piston...Thanks!

Max What metal did you use for the cylinder? is that a brass or a bronze. I would generally opt for a different metal so if you use a...

Silly question....what material would the piston be? Brass, or steel? Thanks....MJ

I agree with what you are saying. The person I mentioned that purchased the pre-welded certified steel boiler I think is the way to go...

I also think the angled ports would work better than the 90 degree, right angled ones on the larger JDW design..?

I would not consider a steel boiler for model operation because of corrosion. Most of the model boiler designs I have seen are copper...

lagging is insulation material that goes into the void around the cylinder between the two end flanges. You then fit metal or wood...

I was going to look at it in the 5 axis, but I'm not 100% of the depth/wall thickness of the cylinder wall. I think it maybe 3/32" ?

Lagging = copper or brass sheet metal that wraps around the cylinder, theoretically with insulation under it, though you don't need the...

I'm going with the small original Ramond Yates drawings, 5/8" piston. I can still recess around the cylinder, if that's an advantage...

So what design did you end up going for and what size? Although I often fabricate my cylinders or manually cut from solid I have done...

Well I've made a start...although I do admit to cheating, as a work colleague machined this on his 5 axis...

trlvn- You are totally not getting the point I was trying to make. I was referring to how a silver solder failure like that would...