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I thank you for that comment. One last thing I would like to ask is about lubrication I know that sometimes lubrication will foul up the heat transfer in the regenerator/displacer. But some how metal-metal (like you recommended Cast Iron-Cast Iron) would require some degree of lubrication. Should I ...

Thanks for the heads up for the power piston here is another one: I have made quite a huge (in terms of its size) Stirling Engine and here are the following details Displacer diameter: 590mm (about 2 ft) Displacer stroke: 60mm (about 2.4 in) Piston diameter: 105mm (about 4.1 in) Piston stroke: 60mm ...

I have some concerns about choosing materials for my power piston and the cylinder. I have thought of using Teflon pistons on cast iron/steel based cylinder. Any other recommendations using other combinations? (metallic-metallic which I have problems thinking of one) Thought of using a brass piston ...