www.pulse-jets.com

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?



Nick

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...

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...

Hi Metiz,

it was a powder(chemical) he added to the ethanol - I'll see if I can find out what it was

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...

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 ...

Looking forward to seeing the test Mike!!

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? -...

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...

I know I shouldn't laugh but ...

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 ...

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...

Hi Mark, I'd like to see a video of that one when you get a chance! Some pretty extreme rations there so its length to CC dia ratio is 33.5:1 and snorkel dia is 1/5th the CC ? I'm wondering if the wider longer snorkel is sort of choking down the diameter for the "high speed" exhaust gasses but allow...

I'm pretty sure it was Mike who once said "....there are only two types of object in the world - those that are useful for pulsejets and those which are not" or something like that LOL!

Hi Mark, if the shape is anything to go by it looks pretty cool :) My mill is for business - R&D plus some production work its cnc so is likely to be very useful in ways I haven't even thought of yet. Here it is https://www.tormach.com/product_pcnc_770.html Not my first cnc but certainly the most ca...