Muffler Shop Special

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Mike Everman
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Muffler Shop Special

Post by Mike Everman » Tue Oct 02, 2007 6:34 am

Hi guys. This is a first cut of a plan that's at the muffler shop now. I thought it would be cool to have a blueprint a person can take to a muffler guy that uses the material and tools they typically have. Coming up after I run the straight pipe version will be two tail options that have one and two expansion steps.


*edit* UPDATED drawing to Rev. A (second sheet with expanded tail)
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Irvine.J
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Good stuff.

Post by Irvine.J » Tue Oct 02, 2007 8:40 am

I love it mike! Its about time everyone can easily have their very own pulse-jet, anywhere in the world, i'd guarantee there is a muffler shop. Simple plans, perfect! I think its a good easy way for people to get their very first pj started.
James- Image KEEPING IT REAL SINCE 1982
http://pulseairdefence.com
[url=callto://project42labs]Image[/url]

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more muffler shop special stuff

Post by Mike Everman » Wed Oct 03, 2007 3:44 am

Here's some photos. Muffler guy dropped it off so I could drill the fueling holes before he welds the fueling chamber and brake line feed tube. More tomorrow. I hope to run it soon!
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mss 004.jpg
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Irvine.J
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Bow chicka bow bow

Post by Irvine.J » Wed Oct 03, 2007 8:27 am

Testing forum post...
Bow chicka bow wow...LOL
Mike, unreal! Can't wait to see her run!

The real bow chicka bow wow, not this stupid deodorant add!
http://youtube.com/watch?v=1N_cElYJa_U
James- Image KEEPING IT REAL SINCE 1982
http://pulseairdefence.com
[url=callto://project42labs]Image[/url]

PyroJoe
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Post by PyroJoe » Wed Oct 03, 2007 5:48 pm

Sweet! Excellent idea.

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Post by Mike Everman » Wed Oct 03, 2007 6:07 pm

more pics
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mss 001.jpg
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mss 003.jpg
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mss 002.jpg
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Mikes engine

Post by hagent » Wed Oct 03, 2007 8:40 pm

Hey Mike,

I'm glad you put the fuel holes at aprox 45 Degrees from the intake flow.

That seemed to be a limiting factor on my concentric PJ because I think the propane pressure was starting to interfere with the intake cycle when the fuel was pushed in at 90 degrees to intake air flow.

Good luck!
Hagen Tannberg

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Muffler Shop Special

Post by Mark » Wed Oct 03, 2007 10:03 pm

There's a certain irony going to a muffler shop to make a pulsejet.
Mark
Presentation is Everything

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Post by Mike Everman » Wed Oct 03, 2007 10:59 pm

LOLOLOL
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Re: Muffler Shop Special

Post by Eric » Wed Oct 03, 2007 11:29 pm

Mark wrote:There's a certain irony going to a muffler shop to make a pulsejet.
Mark
Indeed :D

Nice job Mike, cant wait to see how it works :)
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Post by Mike Everman » Thu Oct 04, 2007 4:43 am

Thanks Eric, and still laughing about that one, Mark.

More pics. In this project, my aim is to make it practically zero work and low cost to run a first pulse jet.

The last welds done by Danny, the muffler guy. ;-) Man, is it air tight.

I just have to drill a hole in the fueling chamber for the feed tube, and just so there's no actual welding required outside of the muffler shop, I'm going to give Danny a shot at welding the brake line over the hole. It's a bit finer work than he's set up for, I think, but he's keen to try.

Just so it's at a low level for starting equipment, I'll try Eric's tiny hole in the CC and a blow torch for lighting (or maybe a bic lighter on high), and a car camping airbed inflator for starting air (or ha ha, a handmade bellows?), and go up from there.
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mss 005 small.JPG
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Post by Viv » Thu Oct 04, 2007 2:37 pm

Nice to see a Collins collar out in the wild Mike:-) you could have used a simple tube from the inlet flare back to the CC chamber and increased the collar chamber size, welding the flare lip would have simplified things as this was one of the original goals.

Love the whole engine though, very nice

Viv
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Monsieur le commentaire

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Post by Mike Everman » Fri Oct 05, 2007 2:45 am

Viv wrote:...you could have used a simple tube from the inlet flare back to the CC chamber and increased the collar chamber size, welding the flare lip would have simplified things as this was one of the original goals.

Viv
Heh?


Update: fuel tube goes on tomorrow morning. First light should be tomorrow night or Sat morn. Hope it goes. Even though it's low fidelity, it's got a lot of what I've learned in it. I'll be crushed if it doesn't start right up!
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Post by Eric » Fri Oct 05, 2007 2:57 am

I think Viv means something like this, a mix between a surge chamber and a fuel injector.
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Post by Mike Everman » Fri Oct 05, 2007 3:16 am

Oh yeah, OK. Fuel modulator. Yep.
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