thank you to those that took the time to give me advice happy spudding to all

thanks also is there sum type of reinforceing tape i can wrap the combustion chamber with to lessen damage should something go wrong?

Uploaded with ImageShack.us

yeah im from nz. how do i put a pic up? new to this computer thing.

just test fired about 20 spuds huge success worked perfectly i think this is my new hobby for sure. hopeing to learn a lot more about this and think this site will help me do that no worries.

sweet well its cureing overnight and will test tomorrow

combustion chamber is two foot by 4 inch barrel is 1.5 metres by 2 inch with a piezo igniter

have just built my first cannon but its made with dwv pvc what is the chance of explosion and pain?