www.pulse-jets.com

Great! Nice run to start a year that can only be better than last year!
I gotta get out and make some flame and noise. Thanks for the inspiration.

Hope all is well otherwise, Joost!

Great, can't wait!! Not much else going on around here.

I reminisce often. Wish there were more going on with this forum! Hope all is well!

It's the 90-90 rule:
The first 90% of the job takes 90% of your time.
The last 10% takes the other 90% of your time.

Sad to say, I've got to hit the road for the weekend tomorrow morning to visit a dear and terminal friend, so our collective jollies will have to wait...

GAaa, well, I've got to get more serious about my plumbing. I've always used the tank valve, so me little push fittings and plastic tube never developed any appreciable pressure. Now, I'm valving in two places at the motor, and multiple shenanigans have ensued! I am running into this a lot these day...

I am GMT -7
Best I can do is about 5pm today my time, sorry!

All ready to go! I found some tiny tapered carbide endmills in the “box of woe”, looks like the nose of it is .025”. Punched in quite nicely. 27906E6A-53E2-46F7-BDA3-885A5B929489.jpeg D770F15D-1751-451D-9F51-9BB6BC77DF09.jpeg The starting stinger has metering and a pushbutton switch. I’ve got a valv...

It’s definitely going to work.. I hooked up the stinger and got a great starting resonance and grumble.
Bad news is the stainless has work hardened somehow, and is just undrillable. I need some carbide bits to continue.

So, about to drill five fueling holes in the CC. I’m torn between tiny, like .03”, but my 1/16” drills look quite tiny as well. I don’t think it is any simple area/flowrate calc, because the fuel jet velocity is a huge variable. The question is: Better to be smaller, energetic and turbulent delivery...

Mark, if you look at the first photo, they are freshly printed and still in the powder bed. The support is the comb like support features that must be removed by hand. Nick, yes it is the same material. They printed the “stomach” (tough not to call it that now!) u-bend up, and so I find support ribs...

So, I've got the 5 fueling access ports tapped and pluggable, and now I'm down to selecting the fueling hole diameter that will shoot inward at a 45 deg angle. Too big and I can't fix it, so I'm torn. pjsls full.PNG pjsls cutaway.PNG I've taken to thinking I want tiny holes, but stiff jets seems dis...

Mark wrote: ↑

Tue Mar 15, 2022 5:21 am

I was wondering how many bananas does it weigh?

Hi Mark,
It is approximately 3.5 bananas, if bananas are 3/lb. ha

Yeah, I’ll do a few tests at nipping it to make a Rosscojector, but when you think about the area we are talking, the holes i was experimenting with were around .5mm. A nip or slit just seems too hard to replicate, or hit any specific area in production. Maybe it’s not that finicky…. I’m pointing do...

Well, only one didn't have support material in the CC. And the fueling holes are clogged with support material too. I’ve gotten it just far enough to try the starting stinger: 8DE4670B-F8B0-4F55-93F6-8604E9BBCCD0.jpeg Need to find my dinky drills. I think a good starting point for this stinger is .5...

Here you go, Simon, bananarama: