All-soldered construction
I had a close look at my prototype and decided to make cylinder block that would be made of two supporting sheet metal plates into which I would insert piston and cylinder sleeves. I figured out that I could then very easily make steam ducts just by shielding them with thin sheet metal soldered to the sleeves.
Update: compare to steam cylinders in welded construction
![](img/Ol49_cyli.jpg)
![](img/Ol49_cyl1.jpg)
First, I prepared cylinder sleeves, approx 2 times too long, bored with a 5.5 drill, O.D. 8mm. Then on a milling maching I bored steam ports. Then I I tured the inside diameter and honeyed. At the end I cut the cylinder to lenth.
Pistons with piston rods are likeways of brass. I turned the O.D. for a interference and then honeyed.
![](img/Ol49_cylbl.jpg)
In the firs soldering attempt I took wrong order of operations. I soldered the sleeves into frames and then the lids. While soldering the latter the sleeves moved laterally and destroyed the steam ducts.
![](img/Ol49_cylrozl.jpg)
![](img/cylindry_komp.jpg)
![](img/Ol49_B-3i-setup.jpg)
![](img/Ol49_cyls2s.jpg)
You can see the wires used for enclosing the steam ducts.