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Well I have a lot of left over brass rod but no flux. I guess I could try solder flux but I think I will grab some brazing flux. Dont have an oxy/Acetylene torch but will try propane

Well The displacer piston did leak in it but as I was cleaning up the cylinder I got a sinking feeling as I kept seeing a glint of light. Upon further investigation I found a hole below the top of the fire box right about where I had drilled through the fire box for a rivet. Maybe I should have done...

The can makers don't think of us too much, the inside of the can is coated with laquer, or some plastic coating, it can make soldering difficult. Epoxy or similar is OK at the cold end, and it's best if you can design it so that the rod does not go through the bottom. Some cans can leak around the ...

Thanks guys When I 1st checked the displacer piston it leaked around the rim of the can. I assumed soldering the rod melted out what ever the canning co used. I went around it with epoxy and forgot to recheck it but I think I will find another can and not solder it, use only epoxy to seal around the...

I attempted to build an engine from Darrel Boyd's design. I changed it up a little but same basic design. It has no noticeable friction but will not run. I played with the displacer timing and got it a little better. I changed the power piston from a heavy brass piston to a plastic one. Just so happ...