I remember the pulse jets from the late 50's early 60's. I first saw them at a controline meet in plainview, Long Island. The starting process was different then. The pit crew used a bicycle pump to start the engine. The model was a speed plane mounted on a wire dolly for take off. Wow what a noise maker, and fast. I never saw another one fly after that meet. I think they were called Dynajet.
I don't think there was ever any other use for them but controline speed.

Sledge_78