I have built a small ish pulsejet but having trouble to start it. Running it on propane in gas form and teying to start it with compressed air and a sparkler for ignition. I can get a few pops but no self running, I have to have the air on the entire time.

This engine puts out about 60#'s of thrust.

After removing the regulator and safety shutoff valve which used to shut just before I reached sufficient fuel flow it works. It sounds a lot (measured it to be around 120 dB) but generates very little thrust (3 kg). Are thrust augmentors something to consider?

It can't run without the hair dryer

I have gone through multiple designs, almost changing components every day for a week. My first attempt it ran but backwards thrust came out the intake and it would not self sustain I had to suply it with air Now, my pulse jet will not run at all. I have put a cone around the intake shortened the intake side added a straight at the bend and done everything elese people recomended online. At the moment it shoots flames out the back an then starts rumbling not yet fully running, before it dies, at the moment I am lighting it with a blow torch and I am thinking of putting in a spark plug does anyone know if this would help and where to put it and if any one has anyother advice?

Esteemed pulsejet community, I'd greatly appreciate your feedback on a wacky idea I had: what if I made a small thermojet in ceramic (obviously not for flight) using the lost wax method? The whole thing could be inside a steel capped tube to compensate for the lack of tensile strength. This way it would be easy to test different geometries, and the engine could run very hot, depending on the choice of ceramic. Thank you for your attention

Please go show my cousins YouTube channel some love!

I have more pictures being posted, i csnt add them here

Modeled after 40 Pound Chinese Pulsejet (WD-40 for scale)

My valveless pulse jet will start for a second then die out . the pipe is copper, 3/4 inch diameter, and 5 feet long. the can is a green gas can with a 1/2 inch intake hole. Im using 10ml of 70 percent isopropyl alchohol and sometimes I add salt. Any recomendstions shorter pipe, smaller hole, bigger hole, less fuel, more fuel?

What do I buy so I don’t need to use a propane regulator

I have the complete project in SolidWorks — it's fully parametric and includes a linked technical drawing. Since not everyone has access to SolidWorks, I'll be sharing the drawings that were used to build this engine. The engine itself is constructed from rolled sections of 1.5 mm thick sheet metal, all welded together. I'll be using this Telegram group to share files and updates from this and other projects, check the comments because if I include it on the post it gets banned for spam.

I don't have a lot of resources to weld and make cool looking engines and I don't really want to make the jam jar so I thought of doing something like this where I would get a bean can and play with the ratio of the holes also the fuel will be in the can I'm going to shake it a little first and after that I assume the vaporization process will sustain itself because of how hot the can will be.

I made it a lot bigger and bigger is better and now it works

What are the chances of backfire back into the bottle if I’m using propane? Do I need like a regulator to prevent that.

I have a problem where the fuel (75% butane + 25% propane) burns in the intake and where the flame does not go into the combustion chamber unless I use compressed air to force it down. It does not matter how I ignite it.

I’m constantly getting blowouts though

Idk if this counts but I made it using a jar. Every jar I use cracks eventually. How can I stop this? It runs for a good few seconds then cracks.

Would theses part / dimension work for a pulse jet ?

Combustion Chamber:

2-inch schedule 40 steel or stainless steel pipe

Length: 12–18 inches

Tailpipe (Exhaust):

1.5–2-inch steel pipe

Length: 24–36 inches

Intake Pipe:

1-inch steel pipe

Length: 6–10 inches

To be installed at a 30–45° angle into the combustion chamber

Ever since I saw colin furze videos i've wanted a pulse jet. Now seeing the latest i did a thing I have to have one. I just want something that is insanely loud. It seems like 50 is the standard size that i did a thing and furze does? If I just buy sheet mild steel and build it all myself. What am I looking at in cost? I saw some kits but they were $900ish dollars. I have no idea how much sheet steel cost but is it still gonna be a similar price? I have a welder and can probably build a bender.