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<t>Hi Steve. You certainly understand what I have suggested. It seems that the biggest problem <br/> with the "H" displacer is the excessive dead volume that it introduces. The gains by adding <br/> more serface area to heat and cool the gas might be offset by the increase of dead volume <br/> ( eg....

<t>I have a displacer design for a Stirling engine which differs from a conventional Stirling <br/> engine displacer. I call it an "H" displacer. This displacer has an "H" cross section when <br/> sliced open.<br/> This displacer has no enclosed volume. It is a thin wall cylinder open at each end wi...