In this post i am going to show a video of me cutting the displacer out of 7 mm foam.
The Displacer is used to shift air from one side of the main cylinder to the other.
You can see it doing this in a video i made below, there's no need to watch the whole video, just enough to get an understanding of what the displacer does.
The Displacer i cut here will only be a preliminary design, it may need to be modified when the whole engine is complete to allow for better air flow etc.
Here is the video showing me cutting the Displacer from 7mm foam using a Taig CNC Mill -
If you would like to follow my progress making this engine more closely go here
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