A vertical steam pump.

[Michael S.]

I’ve finished the connecting rod between the eccentric and the slide valve. I was curious to see if the pump would turn when I pressed the compressed air hose against the inlet. The joint currently uses just a simple M2 screw; that will be changed later. The pump valves are also still missing.

Michae

https://youtube.com/shorts/T8Qknv03bMw?is=euOearGT2D5MOuV5l

The initial test run was performed without seals on the cylinder or stuffing box. The piston does not yet have a piston ring, and the slide valve was only roughly adjusted. Still, I am pleased that the engine turns.
Now, everything is being disassembled, and the iron parts are being painted.

[crueby]

Even without those last parts and the seals, its running very well!!

[Sanjay F]

It looks gorgeous and runs great without all the seals etc. You've really made something special there, congratulations 

[PaulR]

That's a beauty Michael and what a smooth runner already! 

[Roger B]

Looking good    I've always liked scotch yoke engines   

[Michael S.]

Thank you, Chris, Sanjay, Paul and Roger.