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by Mike Everman
Mon Aug 14, 2017 11:47 pm
Forum: Valveless pulsejet forum
Topic: Mike's Build Log
Replies: 379
Views: 101310

Re: Mike's Build Log

Not sure I'd call it a rectifier as much as a vortexifier. ha Also thinking about your SiO2 crucible one, where the hole is just longer than it is in diameter. Now that, and like snorkels in general, are rectifiers. That's the next test, adding a smidge of length there. Maybe get rid of the flare on...
by Mike Everman
Mon Aug 14, 2017 5:56 pm
Forum: Valveless pulsejet forum
Topic: Mike's Build Log
Replies: 379
Views: 101310

Re: Mike's Build Log

So, this one is 57mm ID, 110 length, with a 9mm hole. Reynst had a movable bottom on his ultimate device, so starting was at a longer/higher volume state, and moved to shorter. I'm printing one with an 8mm hole to try tonight. Then maybe the midnight design effort will be a water jacket. I'm really ...
by Mike Everman
Mon Aug 14, 2017 3:47 am
Forum: Valveless pulsejet forum
Topic: Mike's Build Log
Replies: 379
Views: 101310

Re: Mike's Build Log

It works well! Another failed print out of ABS (settings need tweaking); switched back to the lower temp PLA and a perfect print. Here's a short video. notional printed reynst, small.mp4 Cold frequency is 282 Hz, running frequency is 82 Hz If I let it go a few seconds too long, it gets warpy down ne...
by Mike Everman
Sat Aug 12, 2017 4:47 pm
Forum: Valveless pulsejet forum
Topic: Mike's Build Log
Replies: 379
Views: 101310

Re: Mike's Build Log

I think definitely Reynst is on board with this model, ha. He was about breathing more than thrust. This is just a printing demonstrator with completely notional geometry I can hold in my hand. Most of the "design for 3d printing on cheap printers" has to do with eliminating support material, which ...
by Mike Everman
Fri Aug 11, 2017 10:17 pm
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1715
Views: 288216

Re: Odds and ends

You are really ramping it up, Mark!
by Mike Everman
Fri Aug 11, 2017 2:25 pm
Forum: Tools and Construction
Topic: Odds and ends
Replies: 1715
Views: 288216

Re: Odds and ends

Love the "Will It Jam?" segment idea. ha Hey, RE that SiO2 youtube video. I'm working on a new spreadsheet that speaks specifically to pulsepots. Can you tell me the volume of the crucible and the diameter and length and any other geometry regarding the exit? The run is quite good and I can easily a...
by Mike Everman
Thu Aug 10, 2017 3:00 pm
Forum: Valveless pulsejet forum
Topic: Mike's Build Log
Replies: 379
Views: 101310

Re: Mike's Build Log

The capability for rapid iteration has changed everything about the way I design. Just holding designs in your hand can be as important as proving the function in any one area.
by Mike Everman
Thu Aug 10, 2017 5:19 am
Forum: Valveless pulsejet forum
Topic: Mike's Build Log
Replies: 379
Views: 101310

Re: Mike's Build Log

And to prove my point, I'll get this printing before I go to bed.
abs jam pot.PNG
by Mike Everman
Thu Aug 10, 2017 4:24 am
Forum: Valveless pulsejet forum
Topic: Mike's Build Log
Replies: 379
Views: 101310

Re: Mike's Build Log

printed two fold pocketjet, web size.jpg I've got to look into a resin printer. I've got two Ultimaker FDM machines, and they run really well. I just printed a two fold version of my 1.25" intake pocket jet. I'm designing the augmenters to throw on there. Base motor was 5.4 lb thrust. I'm hoping to...
by Mike Everman
Sun Aug 06, 2017 3:44 pm
Forum: Valveless pulsejet forum
Topic: Mike's Build Log
Replies: 379
Views: 101310

Re: Mike's Build Log

I'm back and cleaning up all the camping gear. Good trip, nice to have a week with just our younger boys home from college. Mark, "it comes to mind that I could be missing something that exists but would never find unless you created the conditions for it to work." Classic. I've always thought some ...
by Mike Everman
Sat Jul 29, 2017 3:39 pm
Forum: Valveless pulsejet forum
Topic: Mike's Build Log
Replies: 379
Views: 101310

Re: Mike's Build Log

Ha, dude, I love that picture. I see you've taken over the dining room table.
It's the "where's waldo" of pulsating combustion.
Thanks again for the toy loan. Going fishing for the week at 9,600 feet or I'd bring them along!
by Mike Everman
Fri Jul 28, 2017 8:33 pm
Forum: Valveless pulsejet forum
Topic: Mike's Build Log
Replies: 379
Views: 101310

Re: Mike's Build Log

Fan mail from some flounder?

The famous resonanttheme snorkelers are in the hizouse! But I can't play with them until the 7th!

https://www.dropbox.com/s/43mqyl4men7sb ... 6.jpg?dl=0
by Mike Everman
Mon Jul 24, 2017 10:50 pm
Forum: Valveless pulsejet forum
Topic: Mike's Build Log
Replies: 379
Views: 101310

Re: Mike's Build Log

Mark wrote:I mailed three little bottles to you this morning Mike that should arrive in a couple of days from snorkelville. snip Happy snorkeling!
Thanks for everything, Mark!! I'll be gone a lot this coming month, but will definitely play.
by Mike Everman
Mon Jul 24, 2017 5:30 pm
Forum: Valveless pulsejet forum
Topic: Mike's Build Log
Replies: 379
Views: 101310

Re: Mike's Build Log

I like it! clearly a measure for the spinny pot. I wonder if some concentric baffles on the bottom might make a normal static pot behave better. I'll do a slo mo of one of my glass post and see how turbulent the liquid in the bottom is. Just getting a spinny pot going is a real hurdle! i hope we can...
by Mike Everman
Mon Jul 24, 2017 2:30 pm
Forum: Valveless pulsejet forum
Topic: Mike's Build Log
Replies: 379
Views: 101310

Re: Mike's Build Log

But if it were easy it wouldn't be special. True that! Thanks for the reminder about trying non vertical orientations. I've gone through almost a 12 pack of silver bullet so far, and now finally some light at the end of the tunnel. New fuel, and putting a .53 inch hole in the bottom and running hor...