Quote from: runaway on July 20, 2008, 07:40:14 PM
Hi...

I have been reading through the thread here so got to it and put together a plug.
The center electrode I machined from of a solid S/steel rod, which has a hole drilled down the center and a little hole cut just behind the end of the electrode end.
The cavity where the water will pool behind the electrode I built up with wax, then filled the rest of the pug with high temp cold weld goop.
After that just melted out the wax so the cavity is clear to hold water.
Well, I think this could be the right sort of plug design but I couldn't get the bang needed that would drive a piston.
The ignition coil is a bit old and tired so wouldn't surprise me if thats where the issue is, so will need to get hold of a new one.
Anyways, thought I would show where I got so far with this.

Phil......

Phil

nice design 

I  would not have throught  of   the  cold weld goop ....   was it JB Weld ?

I was planing on using  a  2 part ceramic ...... if  your  weld goop is  durable  enough it is a  better choice .

I would like to see  more people   try to   modify a plug like you  have done
making the  plug  part is   difficult   but it  solves  alot of problems .

Once you  get your  system working you  will be way  ahead of the pack .

The  system  that  most are working on here   at this point   has no  ability   to control  the  output  of the  motor ........ an injector  can  vary the amount  of water that comes in contact with the plasma .....
Your  design  should have execelent  control   once you   get the right injector pump worked out .   


If you  havn't  seen  my ideas for an injector plug   yet they are at
http://www.overunity.com/index.php/topic,5088.0.html


gary

Hi,,,,

  Thanks for kind comments.
The plug works fine and slams out a good blast.  Just not enough to drive a lawn mower engine, but it would for sure run a model engine.
I have a gut feeling the coil is a bit tired, so will be picking up a GT sports ignition coil today.
But the thing is the water is trapped perfectly in the cavity and blasts out 360degs, where the plasma can work in a 360deg area also.
Actually it is amazing at 4.4khtz the plasma seems to spin around the gap like ball bearings.

The circuit I tried first was the original one, I think it was Luc who did that if I remember right. Sorry if I got that confused.
What I am doing now is drawing out a circuit so it will be switched with Mosfets and also control the electronic valve.
For the valve I had a diesel pump laying around and pulled out the electronic shut off solenoid. A bit of machining there yet to adapt this right.  My idea next is to pressurise a cylinder holding the water and use this to feed the plug.
The goop is a 2pack,, Permatex Cold Weld,  Hardens like steel handles 3000PSI  (item No: 14600).  Obviously its non conductive or we wouldn't get anything happening. Hehehe.

Yes, will get some video going soon when I get this coil sorted and things tuned better.

Cheers Phil......

I sent an email to Aaron asking this (It is his circuit), but can anyone confirm the wiring is correct on this slightly modified version of his spark enhancing circuit please?
http://www.mediafire.com/?nnmjbj9mrjn

Quote from: runaway on July 20, 2008, 08:48:35 PM

The goop is a 2pack,, Permatex Cold Weld,  Hardens like steel handles 3000PSI  (item No: 14600).  Obviously its non conductive or we wouldn't get anything happening. Hehehe.

Phil

I found a datasheet
http://www.permatex.com/documents/tds/Automotive/14600.pdf

it looks like there   is a problem   with oxygen

I would think that once the   plasma  forms   you   have a very oxygen rich  environment
I guess  if this  turns out  to be a problem  a " washer "  of  some  high temp non  conductive  material  on top of the  wax would   fix the problem .

gary

Quote from: epeirce on July 20, 2008, 08:05:14 PM
@bumfuzzled
maybe a non-medical syringe needle used for glue or solder paste mounted in your spark plug housing would do the trick.

It's got to be even smaller than that. I made a very crude nozzle today and it's just putting out too much. I did get it to fire a few times. Had the assembly sitting on a spray can top with a hole cut out in the middle for it to stick thru. Turned the lights out and pulsed the pump, it was pretty wild how it was lighting up the spray can top. It was even lifting it up off the table just a lil bit.

I've got a small solenoid valve I'm going to put inline when I get the right fittings, this will shut off the water flow immediately and maybe not drown the plug as bad. Plus I need a pressure relief valve so I can leave the pump running all the time and just pulse the valve and set my pressure where I want it.

I had it sitting upside down earlier today and was shooting it with the hand sprayer and it would light off everytime. I held my hand about a foot above it and you can definitely feel the shockwave from it.