I have successfully launched eggs out of a 2” barrel. I cut out a cup from the bottom of the egg carton for use as a sabot with some paper towel wadding behind it. The method was good up to approximately 50 psi.

Does your N.D.S. look like my N.D.S.?

I used the ceramic insulated electrode that came with the igniter. It is housed in the rear 1/4" connecting tube and was locked in place by filling the tube with J-B Weld.

Insomniac wrote:The C:B ratio looks out of wack though, I think it would be better with a larger chamber.

The C:B ratio is not optimal. However, I wanted to keep the two tubes the same diameter and close in length to minimize the size.

Thank you all, for the positive feedback.

Hello,

This is my first cannon posted. It is a copper mini combustion with 1/4" diameter barrel. Good for shooting q-tips around the house using map gas as a propellant.