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I Error in this depiction of a Stirling engine?

  1. Apr 4, 2017 #1
    In my (German) physics lecture notes, I found this depiction of a Stirling engine:
    According to the text, it should be
    A: isothermal expansion
    B: isochoric cooling
    C: isothermal compression
    D: isochoric heating

    This seems correct for the PV diagram, but strange in the illustration on the right. Shouldn't A and C be (approximately) isochoric since that's where piston A (green) is at dead centre?
  2. jcsd
  3. Apr 5, 2017 #2


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    Staff: Mentor

    It looks like the labels are shifted by one phase. B in the PV diagram is A in the sketch and so on.
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