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Ok, so we have to make the cylinder out of aluminium (6082-T6 grade), as the design has fins cut into the aluminium "tube" to act as the cooler for the engine. So we can't use aluminium on the cylinder/piston interface due to friction, is that right? I'm guessing some sort of cylinder line...

Hi there, As part of my university degree course we are making a rhombic drive beta Stirling engine, which is powered by a solar collector. Due to machining capabilities and heat transfer the cylinder material was chosen (and ordered) to be aluminium. I have been trawling around the internet trying ...