www.pulse-jets.com

Drilling pinholes will be a hot topic if I have the glass blowers blow me a pocket jet. I would like to preserve the fueling I use, which will be tricky in quartz. Thinking laser.

Oh yeah, I suppose we did talk about this http://www.pulse-jets.com/phpbb3/viewtopic.php?f=3&t=4190&hilit=chicken+drive&start=15#p59619 I think I'm favoring the simple free turbine idea better now. I can imagine the Coriolis and centrifugal forces going on are going to massively hurt flow on the "sp...

IDK. I know it’s not a guessing or cut and try game though. There are governing gas dynamic principles you need to observe. Ones I do not know and have not researched.

I’m going to make a plastic guide and see if I can cut it net size. The wire should make a nice finish if guided properly.

Hey Nick, hope all is well! Need to come out there in '19 for sure. I'd like to see this one too as it's been percolating for a long time, so am laying in some supplies. But anyone that reads this thread knows I'm all talk until I am not! I've had to scale back on work a bit for my sanity, so am ima...

So I've got this notion to make a PJ powered bike out of a 1L pocket jet I have. Just go for a simple free turbine and gear it all down. I do not care about how fast I go, gearing it for 10-15ish MPH(?), assuming 100m/sec achievable tangential velocity(?) I do not have any interest in using a PJ big...

I just ordered the diamond wire saw blade and holder as well. I also got a set of diamond files: https://www.amazon.com/gp/product/B00PAQWTI0/ref=oh_aui_detailpage_o04_s00?ie=UTF8&psc=1 My clockmaking buddy says he cuts tube by scoring it with a triangular diamond file and snapping it with his hands...

I don't know much about them, though I do know that getting a flow to stick to a wall that diverges more than 30 half angle would be a problem. Flat walls will need to be a honeycomb panel or otherwise greatly stiffened. You will be fighting drum head modes of vibration in flat walls.

Better. That last one I thought had too steep a diffuser.

Cool. I get dibs when you go off to the hoarder’s hospital.
Ha
So, do you think the guys that did your quartz jam could blow a whole pulsejet?
Who did you use, and did you have a good experience with them?

Hey Mark, hope all is well! Getting ready to cut some of that Quartz tube you sent me lo these many years hence. I wonder if scoring it in the lathe with a glass cutter and break will work? I do need to grind the ends flush to a specific length, too. As I recall but can't find it was you were a fan ...

You and me both. It was a fine piece of work. I made him a moderator so he could edit this thread to his heart’s content, hoping he’d embed his figures, but he hosted them all on free picture services that went away.
Tragic.

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.