www.pulse-jets.com

True. Organ tuners becoming rocket scientists, interesting. I am on the board of directors for a theator organ society. Never saw the parallel. Thanks

I'm curious. Pulsejets seem to always be discussed in leignth (maintaining the ratios); Why not volume? We are expanding gas in 3 dimensions. second, how have these ratios come about: mathmatical/trial and error? I have always use trial and error.

Your fueling rig may be taking up too much of the volume of the chamber or area of the intake. Not to scale 1/8 inch after a reducer. .19 out of .63 area (2-d) taken up, also I have the intake the same size as the tail pipe. solved the problem of me finding a reducer 2 to 3/4. Plus the chamber leng...

Even after correcting the chamber size, i couldn't get it to work, but i put in a fuel injector using brakeline fittings threaded through the chamber to use propane. Normal USA propane valves, after the regulator, thread in to the brake line perfectly.
Not to scale...

Propane torch at the end of the tailpipe. I like using the torch because it doesn't go out easily.

How are you suppling the fuel, and what are using to start it (spark/flame, compressed air/vacuum)? ... i got one of these running a few months ago for high school senior research. I'll try to upload some pics by saturday the 5th

Done building it and it needs constaint air to run. Using prop/map. I show pictures soon. Thinking...

It's to late to edit my previous post, sry.
I used the fuel setup on page two, but when trying to start it all i got was a low rumble (about 4 a second), no thrust at all. Plus the metal, no red. What went wrong?

Fuel injected propane? I know how to do it on valved designs, but just looking for some pre-ideas. For all of the plumbing to make the ugly stick: $20 at a local small plumbing store.(this includes the brake line and other feul parts. Ha Ha! It runs fresh outta the box! Looking at the attached pictu...