www.pulse-jets.com

Hi Simon! I still burn some fuel and make some noise, mostly when I want to fire up a young engineer-to-be. You building anything fun?

Yeah, you've been amazingly prolific! And successful! Great job.

I had no idea there were arc lighters! Ding, The More You Know

Cool, I will try all of that! Happy Holidays!

Gawd, I have to make time for more fun! Happy Holidays, those still watching his thread. I ran my 5 pounder on Saturday. 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 ...

That color and sound is addicting isn’t it? I’m all prepped to run one this Saturday.
Scaling from 50,000 feet: a good little motor will scale up, but scaling down is really finicky. That expansive tail makes it more so. If you start with a straight tail, this scale down will probably work.

That said, both have similar acoustic geometries. I remember plotting out the acoustic length correction for the bell mouth of a valver, and it yielded the length you’d expect for a valveless intake tube. It would be a very interesting project, proving they are actually much more similar than one mi...

Very nice, Kevin! No hearing protection required?
Some time at home helped the project, I’m thinking.

Nice!

Following with interest, Mark!

OK I’ll make one! Where did you get the silicone bands?

Hi Luc, I hope all is well!
I am a member of the GTBA forum, which would be a much better place to find answers about turbojets. http://gtba.co.uk
You should join up.

Hi Ganesh, There are 6 holes of .035" diameter at the transition between intake and CC, pointing at 45 degrees from the centerline, toward a point on the centerline a bit into the CC. pocket jet injector holes.PNG I do not have a solid fuel massflow number from test, but at one time predicted it at ...

The intake looks too short, and needs to be rounded inside as much as the wall thickness will allow.

Holy Canoli. 26" tailpipe exit? Might I suggest you start with a smaller, known to run motor to get yer feet wet? There's a lot to it before jumping into something so dangerous.
Scaling is definitely screwy up in this range.