Spark gap in a metal chamber.

[Spudgun on Crack]

I am building a small but very cool and reliable potato pistol.

I modded a paintball gun grip and mounted a sparker behind the trigger, it works great and it clicks every time you pull the trigger!

I plan on having a metal chamber about 4 - 6in long by 1 in wide with a screw off cap on one end and a 1in to 1/4in reducer on the other. From there i will have a breakdown barrel kit that can go from 4in long to 18in long.

How would i go about building the spark gap in a metal chamber.

I know it can be done but i just want to see what you guys did for ideas.

Thanks.

[jrrdw]

Use insulating washers. Build the points into a small piece of PVC pipe, that would insulate.

[VH_man]

You can always hook up a Spark Plug....... and just use the entire chamber as ground.

[Spudgun on Crack]

A spark plug is pretty big, I have an idea where i can get some very heavily insulated wire.

From my flyback transformer i can cut a few inches of the thick double insulated wire that comes out the top off. Its really hard to strip as i actually have a solid plastic coating on the inside.

[jrrdw]

A spark plug is pretty big, I have an idea where i can get some very heavily insulated wire.

From my flyback transformer i can cut a few inches of the thick double insulated wire that comes out the top off. Its really hard to strip as i actually have a solid plastic coating on the inside.

The metal pipe you have has a plastic coating on the inside? Did I read that right?

[psycix]

Attach a adapter to connect a hose.
Get a wire trough, fill the rest with epoxy.
Bend the wire so, that it forms a nice spark gap with the metal chamber or hose adapter fitting.

[Hotwired]

A spark plug is pretty big, I have an idea where i can get some very heavily insulated wire.

From my flyback transformer i can cut a few inches of the thick double insulated wire that comes out the top off. Its really hard to strip as i actually have a solid plastic coating on the inside.

The metal pipe you have has a plastic coating on the inside? Did I read that right?

It looks more like the wire coming off his flyback transformer has a solid plastic coating.

[rcman50166]

Use coaxial cable. The outside is insulated and the end can be striped to double as the spark gap. It's exactly like a spark plug but without grounded threads and is a lot smaller.

[Spudgun on Crack]

I have a lot of coaxial cable lying around so i will defiantly be able to use that.

I am going to trying to use the flyback cable as it is smaller but if that doesn't
work i will use the coaxial cable.