Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

I have started working on my Alyn Robinson hot air engine again. While I have the correct British tuna can to use for the displacer piston, I wanted to make a displacer piston instead. The pic shows the tuna can and the parts to the home made displacer piston. Amazon will deliver my stainless steel pan scouring pads in a couple of days to fill the piston, to make the regenerator.  Brad Smith, Franklin, Wisconsin