I have not yet seen a PAL operating with this principle.
So here is the pattern that speaks better than me!
![Image](http://i45.servimg.com/u/f45/16/75/29/45/pmc-dr10.jpg)
![Image](http://i45.servimg.com/u/f45/16/75/29/45/img_0619.jpg)
![Image](http://i45.servimg.com/u/f45/16/75/29/45/img_0623.jpg)
Well, I did a test this afternoon and misery, no boom!
I think this is because the spark plug that is too withdrawn from the chamber, the mixture should not be up to it.
So I did another system in order to position my eletrodes where I want in the chamber :
![Image](http://i45.servimg.com/u/f45/16/75/29/45/img_0712.jpg)
![Image](http://i45.servimg.com/u/f45/16/75/29/45/img_0713.jpg)
![Image](http://i45.servimg.com/u/f45/16/75/29/45/img_0714.jpg)
With the electrode
![Image](http://i45.servimg.com/u/f45/16/75/29/45/img_0411.jpg)