Here’s a link to a Youtube of some friends of mine perfecting the starting technique of a scale pulse jet.
This thing is crazy loud!
For the sensitive, beware that their is an “F”bomb uttered after the thing shuts down.
Kind of understandable 😉 It was pretty exciting.
It later got installed on a delta shaped model.
We had to use a launch ramp to get it airborne.
The flight did not end so well. (kinda with a “whumph” in to a plowed field)
Mike claims that it will fly again. The engine was not damaged:)

https://www.youtube.com/watch?v=yW_85lMnPxo

Andy