www.pulse-jets.com

Good job!

Hi Comics, welcome to the forum! Nice build you have there. I don't think the straight pipe will be a problem. Looking at your video, I have one piece of advice, and this is the first time I've said this to anyone on this forum: I think you're using too much gas! Right at the beginning of your video...

Mike Everman wrote: ↑

Tue Dec 15, 2020 2:55 pm

I had to quickly figure out the auto start fuel again, since at the shop we got rid of our air compressor and switched to a nitrogen tank for blow off, which doesn’t work so well for starting a pulsejet!

Not with that attitude

Good to see you back to fin-nicking with jets again!

I tried to build one of these things before. I had a hot (non)start and burned up the turbine. The only advice I can give is: don't try starting too long or you risk overheating. Also, as a general rule: bigger turbo chargers are better suited than the little ones. On a side note: welds are really i...

Valved and valveless engines have different geometries, so you can't just convert one into the other

here it is again

Good stuff. Try adding some NOx to the fuel mixture for a nice boost. If you want to build an augmenter, check here

That's the stuff! Congratulations. Did you feel your bones rattle? Looking at your video, I think you can run it a lot harder still.

Try freehanding the injector to find the sweet spot. If you still can't get it to start, see if you can borrow a compressor somewhere.

Sorry...still not running :? You need more gas. Here's a video of an engine built with Pyrojoe's specs from a couple of years back. It's a bit bigger but the same type. I start it using only a Rosscojector. I've uploaded the whole thing, including all the failed attempts. Maybe you can get some poin...

...you've built 4 engines already without starting even one? Bold move

If you're using a rosscojector, the injector needs to be positioned farther out instead of in. Pretty close to the flare actually. If the flame blows out, you have your injector positioned incorrectly. To find the sweet-spot, hold the injector in your hand and light it. Hold it in the intake in a po...

That's better. It's not running though. You need a lot more gas, like, x3. I don't know if you are wearing any hearing protection but if you're not: for the love of tinnitus, do. When it does lock in, it's going to be the loudest thing you've ever heard.

Is there no sound or is it a problem on my end?

The Rosscojector is that pinched tube, yes. I've linked to it in the other thread. It looks like your copper pipe is kinked. Try bending it in a bigger loop to prevent that. Also use 2 hose clamps to secure the injector and make sure the injector is pointing straight into the intake. See my masterfu...