Stirlingengineforum.com

. My biggest question is what is the ratio of the swept power piston area to the displacer piston swept area. I will try to be clearer about this. Say for instance that the volume my power piston displaces is 3 cubic inches, how do I figure the size of the displacer piston and the volume of the air...

............Your model Stirling engine scale is usualy determined by the cyl. size. Sweep volumes not even an an issue unless you enjoy the math. You should build a close to square up engine ( same size bore and stroke) as you can. My engines are either 15 0r 20 mm. cylinders and stroke of 14 -18 mm...