Here's a regular speed video of the displacer in action. The slow motion on my camera is not good so I used my
Kindle fire tablet. Nothing much to see. It goes up and down like the displacers on most low-temp Stirlings. There
Is a magnet on the end of the power piston and a corresponding magnet on the displacer. When the two get near
each other due to crank position, the displacer lifts. When the two are farther apart the displacer drops. Here's a video.