Search found 359 matches

by Nick
Thu Aug 24, 2017 6:41 am
Forum: Valveless pulsejet forum
Topic: Mike's Build Log
Replies: 364
Views: 76177

Re: Mike's Build Log

Well, more that I want to do liqid fuel for pulsejet and gaseous fuel for pulsepots... I'm in Costa Rica atm, so not doing anything but dreaming... Hey, Costa Rica seems like a good place to do some dreaming :D I'm only a week off blasting down through Europe on my KTM990! - so I'm dreaming of the ...
by Nick
Wed Aug 23, 2017 6:24 am
Forum: Valveless pulsejet forum
Topic: Mike's Build Log
Replies: 364
Views: 76177

Re: Mike's Build Log

Mike Everman wrote:Nick, refresh my memory; your long duration experiments were propane fired, no?
Hi Mike, yes propane - very tiny amounts - start on alcohol then switch over to gas :D

Are you going to have a crack at a long run?

Cheers

Nick
by Nick
Tue Aug 22, 2017 9:02 am
Forum: Valveless pulsejet forum
Topic: Mike's Build Log
Replies: 364
Views: 76177

Re: Mike's Build Log

Great! I'll redesign on my trip for a full jacket, including water cooling of the "vortexifier". Good stuff, I don't know if the "vortexifier" will need water cooling because of the high temp tolerance of the resin - maybe one with water cooling, one without? What I did discover with water cooling ...
by Nick
Mon Aug 21, 2017 6:43 am
Forum: Valveless pulsejet forum
Topic: Mike's Build Log
Replies: 364
Views: 76177

Re: Mike's Build Log

Nice work Mike - the design looks pretty proven dimensionally I guess we need to build it from something more heat resistant. If you want to send me the stl file I'll get it printed in resin when I get from Europe late sept/oct?

:D

Nick
by Nick
Thu Aug 17, 2017 5:19 pm
Forum: Valveless pulsejet forum
Topic: Mike's Build Log
Replies: 364
Views: 76177

Re: Mike's Build Log

I am very keen on going to the bronze foundry. You know you can 3D print PLA and cast just like lost wax? Local art prof is doing that here in Santa Barbara. We should spend a day or two doing that! Do some suitably difficult to fabricate pulsers. Great stuff! - I hope to see Dave in Sept so hopefu...
by Nick
Thu Aug 17, 2017 5:16 pm
Forum: Valveless pulsejet forum
Topic: Mike's Build Log
Replies: 364
Views: 76177

Re: Mike's Build Log

OK here is the dewatering data from Dave the alchemist :D To get the water out of the ethanol, you need potassium carbonate. Add enough so that there is solid powder remaining at the bottom after a day or so. If it is liquid, you need to add more. Carefully pour off the dry ethanol, wash out the wet...
by Nick
Thu Aug 17, 2017 1:44 pm
Forum: Valveless pulsejet forum
Topic: Mike's Build Log
Replies: 364
Views: 76177

Re: Mike's Build Log

Hi Metiz,

it was a powder(chemical) he added to the ethanol - I'll see if I can find out what it was :)
by Nick
Thu Aug 17, 2017 10:38 am
Forum: Valveless pulsejet forum
Topic: Mike's Build Log
Replies: 364
Views: 76177

Re: Mike's Build Log

Hi Mike, Just a thought but the fuel you are using is ethanol? - very hydroscopic- Dave, a mate of mine, who is well into his chemistry, can process/refine it to remove almost all the water - I can ask him what it is he does to do this ( I recall he added something to the fuel and it solidifies at t...
by Nick
Mon Aug 14, 2017 12:01 pm
Forum: Valveless pulsejet forum
Topic: Mike's Build Log
Replies: 364
Views: 76177

Re: Mike's Build Log

That made my day Mike!! :D :D Cracking little device - I guess once you have finished tweaking it you could get it printed in metal if you wanted to? If I can clear my decks I'll get onto printing one on the resin printer and see how that stands up to the heat. Trying to get the upstairs spare room ...
by Nick
Sun Aug 13, 2017 1:59 pm
Forum: Valveless pulsejet forum
Topic: Mike's Build Log
Replies: 364
Views: 76177

Re: Mike's Build Log

Looking forward to seeing the test Mike!! :D :D
by Nick
Thu Aug 10, 2017 9:34 am
Forum: Valveless pulsejet forum
Topic: Mike's Build Log
Replies: 364
Views: 76177

Re: Mike's Build Log

Hi Mike, Hey looks good - nice to see the jet is still Ok :-) Yes, I think 3d printing is a rapid prototype tech we could only have dreamed of a decade ago. I looked at Onshape Mike - its nice but Fusion360 is free/lowcost and getting better all the time - don't think its quite as good as Onshape? -...
by Nick
Mon Aug 07, 2017 4:53 pm
Forum: Valveless pulsejet forum
Topic: Mike's Build Log
Replies: 364
Views: 76177

Re: Mike's Build Log

Welcome back Mike :D I'll get to the printer but busy playing with my new mill at the moment !! I need more tools- more tools :lol: :P Talking of 3D resin printers have you seen this one - (Kickstarter) $259!!!!!! it does casting resin too! https://www.kickstarter.com/projects/249504031/sparkmaker-t...
by Nick
Thu Aug 03, 2017 3:47 pm
Forum: Valveless pulsejet forum
Topic: Mike's Build Log
Replies: 364
Views: 76177

Re: Mike's Build Log

I know I shouldn't laugh but ... :lol:
by Nick
Wed Aug 02, 2017 6:06 am
Forum: Valveless pulsejet forum
Topic: Mike's Build Log
Replies: 364
Views: 76177

Re: Mike's Build Log

Hi Mark, yes those two were looking to do themselves injury :lol: WAY too much fuel of course and too small a hole in the top but hey. I would suggest making 2 plates, one with a hole in the bottom for the round section of the test tube to sit in (not pass through) and another for the lid - use 4 x ...
by Nick
Tue Aug 01, 2017 6:27 pm
Forum: Valveless pulsejet forum
Topic: Mike's Build Log
Replies: 364
Views: 76177

Re: Mike's Build Log

Hi Mark, I actually have a borosilicate jar which an "alchemist" friend of mine got made for me earlier this year my plan is to build a few variants around it so we can see what's going on extended runs (if any!). Something like these V5 and V5.1 https://www.dropbox.com/sh/7fm0eao9gm74y31/AAC7sj4d3H...