Enhancements on the ETC gun

[StarKannon]

I have been interested in making an ET gun for some time so I have in mind the following improvements

1. I had was to use Aluminum foil as the material for ionization, this will allow for a few things. First it will make it so it is easier on the barrel because there is less chance for oxidization and corrosion.

2. I do have an extensive background in conventional firearms, so I am going to apply a few of the design ideas that are prevalent in their design. First off I am going to neck the chamber on the gun similar to the way most high velocity bullets are constructed this will allow for a bigger propellant ionization charge and yet maintain the small fast projectile that is the main advantage of EM style guns.

3. I will cut and thread the breech to make it so I can more easily load and unload the gun

I will also use a tungsten wire for my annode and the barrel wall for my cathode.

My power supply will be 12 300v 4100 mF capacitors arrayed in such a way to give me 3.6 kv at the anode, switched by a mechanical contactor and

I drew up some rough plans for you guys to have a look at:
The bore is .5" at the muzzle
At the chamber 1/8" at the projectile flash hole
The chamber is 7/8" in diameter at the chamber.

Picture is available here
http://s674.photobucket.com/albums/v...urrent=ETC.jpg

[245Tommy]

You want as little chamber volume as possible to avoid heat loss. You also want a high arc resistance which means enough space between the anode and cathode (experiment) while not making the discharge time to long. http://4hv.org/e107_plugins/forum/fo...opic.php?63596 This is the probably most efficient amateur etg ever built (around 20%).