www.pulse-jets.com

Congratulations Mike! What a beauty!
I am going to watch the video again!

Pieter.

Wow!!
What a simple pjet!!!
I want to build one myself.
Is there any plans?

Alexander

thanks, guys. Alex: I'll be posting plans soon. I just need to test some more for the best exhaust length. I also want to measure it fully to see how well it actually followed the plan (I may have been very luckily "not according to plan"). If you want to start right away, a good start is the .pdf early in this thread that has all of the dimensions (I'll help explain the columns if you need it, the output isn't exactly ready for prime-time), and I can't describe the build up better thant the pictures here yet...

Oops, it wasn't a .pdf, it's here:
http://www.pulse-jets.com/phpbb2/download.php?id=270

Guys, here's the Locky Kazoo calculator in excel. I haven't locked it, so you can play and add, and whatever. It's just a dimensional analysis, the one I used to make mine.
It'll do a Kentfield four-pipe kazoo, or a Locky kazoo, or an N-pipe Kentfield (let's make an 12-pipe Kentfield!) and if you look lower, it'll tell you all dimensions for these "standard" engines.

You can enter the CC dia (inside) in mm or inches, enter the wall thickness of the tube you have; it can be larger than the CC, so the squeeze to get the CC right from a larger pipe is calculated. Best, though is to pick a pipe with the OD that you can get split shaft collars in (you need two of those to hold the CC mostly round when squeezing the intake and exhaust throats. (see pictures early in this thread)

Enjoy!

Great, Mike!

The world got a much better place after seeing this video. Good development work, I wish I can keep from trying a replication at home (the neighbors, the neighbors...)


- ville

Ville,
This one isn't too loud even at full grease, at least not to the point of pain. I haven't been using ear protection as a rule. What's that ringing noise????
Anyway, invite your neighbors to see it run, that's what I've been doing, and I'm told it's not so bad for them behind closed doors. Though I am running it at the shop, which helps.
Any help you need building, just ask. I'll be diagramming both the car-crush and a technique that you'd only need a car jack and some wood, stay tuned.
Mike

Dear Mike.
My joy at seeing your motor run can only be bettered by yours.
Sorry it's been a late reply.
Great, just bloody GREAT.
Graham.

Thanks, Graham!
I'll be building a few for optimization, as well as firming up the test stand. I think this one I'll leave alone, as much as I want to use it for these tests, I fear it works so well because of a fortuitous conjunction of tolerances (is there and echo in here?). I'm learning with age. I don't know how many times I've taken a perfectly good system and "optimized" it till it didn't work anymore, then had great difficulty determining how it worked!

When you get above water, I'd love to continue the boundary layer discussion when I can post how this engine deviates from plan...

Dear Mike and Mark.
I suspect that my email is not getting to you. Can you tell me if you Mike have recieved two emails from me today, and Mark have you recieved one from me.
Many thanks
Graham

???????

I haven't gotten any mail from England today either!
Mark

Thanks for your program, Mike!
Very useful!

I'm still fascinated by your kazoo engine...

Mike,

Well done that man!

I did wonder if it would run at all given the narrow intake but I'm glad to be wrong.

Cheers,

Wilson.

Thanks, Wilson, I'm having fun. The real world is encroaching on my good time, though. I'm also having a good time with a new motion stage design, but I'd rather be smashing tubes for a living right about now...

Graham,
Try sending to my yahoo address in the profile, if you will. I still haven't gotten mail to my normal address.

Wow Mike, that's awesome! Seeing that video almost made up for the fact that I drowned my truck tonight...
Great work, job very well done.