www.pulse-jets.com

Liking all this! So, what I liked about the Harbor Freight burner (I've had one for years) is it's a cheap way to get a nice high flow needle valve with all the hookup stuff to the tank. Though I mostly use just the tank valve which takes a fine touch when starting a small linear like this with comp...

pressure is irrelevant. I've never used a heat gun, personally. Have a compressor and a blow-off gun with a nice smooth trigger? Fine low-end control is required. I've seen a leaf blower used on a tiny motor, but it was a study in getting just the very fringe of the flow to sneak in the outer edge o...

You do have the BBQ igniter that has a battery, right? The manual pushbutton type is a pain. I usually put a rubber band around so it tiks without an assistant, though it is a fun way to get my kids involved.

You’ve made me dredge up other pipe fitting work, the weldless chinese:
viewtopic.php?f=3&t=2786&start=30#p34181

That one was fun.

Ah, a trickle of everything is needed until you start getting BANG! Everything open but the needle valve. Slowly crack that, and i mean minimal. Trickle air, like a badger fart. Every pop in the pulsejet cycle, when you actually get a cycle, is a small amount of fuel. You need to get some good ol ca...

Got a pic of it running, Nitro?

I think I've boiled the "why annulars suck" to three things. 1. It violates a simple axiom of having the least surface area for a given volume, the king there being a cylindrical tube. Annular skin drag on the flow is always higher in the all important intake (2x+). 2. If you could, you'd have your ...

And here's a good starting tutorial on this very motor:
viewtopic.php?f=3&t=1643&hilit=ugly+sti ... =45#p19316

I see what I had was a 3/32" fuel stinger, bent and pinched a little. You really want a little exit hole for the fuel injector, like 1mm is the upper end, and there are several positions and angles that work and many that don't. did you see this post? http://www.pulse-jets.com/phpbb3/viewtopic.php?f...

The only fuel tube I got to work on that was 1/8" dia copper, with a little bend at the end (or was it nipped at 45?) murky memory, have to read my own thread on it. Did you do the rounding of the intake edge, making the flare? Till you heat it up some, less air and less fuel until you get some real...

Loving that first animation, Zono. Wish it went longer to see the pressure peak happen again in the CC. Love the way it shows the rarefaction waves colliding in the tail, where it would love to collapse if we use too thin a material!

I want to make a big putt-putt boat. have a meet and do races or something

yeah, go Mark! When you settle on a good vendor, I want to send them a drawing of a pocket jet and see how much they'd charge. I might be talked into bankrolling a quantity of these little guys... noodge noodge, wink wink!

Love those little guys! Trying to catch up after a long work stint. Some weeks away from experimentatation still, unless I check responsibility at the door one day!

Ha! Do tell...