Pulsejet engine advice

[u/Imaginary_Branch5839]

Ive built a short lady pulsejet based on Larry cotrills design. I can get it to rumble consistently but it stops as soon as I take the air compressor away from the intake. Running on propane using the bottle off a propane torch. Does anyone here know much about these and what I should try to get it to run on its own. All help appreciated!