first timer

[kiwi001]

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

[jackssmirkingrevenge]

Pictures, dimensions and even the basic information of whether it's pneumatic or combusion would be most helpful for a useful answer.

[kiwi001]

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

[jackssmirkingrevenge]

Technically it should hold pretty well as long as your fitting is sound and your projectiles aren't too tight or heavy.

[kiwi001]

sweet well its cureing overnight and will test tomorrow

[Fnord]

If you're using a cleanout cap on the end, don't drill through it to place the igniter. Better yet, fill the cleanout cap with body filler or fiberglass/resin. They tend to blow up more than anything else, and can potentially cause injury (especially if you're shouldering the thing).

[kiwi001]

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.

[MrCrowley]

Get some pictures up and we'll be able to give you a pretty good idea about the cannon's structural integrity. It's hard to say from your description as little things such as drilling a hole through a single layer of PVC, or the stuff Fnord mentioned, can have a significant effect on the cannon's safety.

You're not from NZ are you? Just going by the 'kiwi' username.

[kiwi001]

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

[MrCrowley]

Good to see a fellow Kiwi on the forum, there's only a few of us.

As for posting images:
http://www.spudfiles.com/forums/posting ... 13190.html

[kiwi001]

Uploaded with ImageShack.us

[jackssmirkingrevenge]

I would be cautious of that rear plug, the threads aren't really made to take pressure and it's a significant surface area - as Fnord suggested earlier, think about fixing it in place permanently.

[kiwi001]

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

[jackssmirkingrevenge]

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

Duct tape won't hurt, chicken wire is also an option - but the best way to be safe is to simply use pressure rated pipe in the first place.

[kiwi001]

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