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first timer

A place to ask general spud cannon related questions.
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Unread postAuthor: kiwi001 » Sat Dec 03, 2011 2:40 am

have just built my first cannon but its made with dwv pvc what is the chance of explosion and pain?
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Unread postAuthor: jackssmirkingrevenge » Sat Dec 03, 2011 2:56 am

Pictures, dimensions and even the basic information of whether it's pneumatic or combusion would be most helpful for a useful answer.
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Unread postAuthor: kiwi001 » Sat Dec 03, 2011 3:37 am

combustion chamber is two foot by 4 inch barrel is 1.5 metres by 2 inch with a piezo igniter
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Unread postAuthor: jackssmirkingrevenge » Sat Dec 03, 2011 3:40 am

Technically it should hold pretty well as long as your fitting is sound and your projectiles aren't too tight or heavy.
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Unread postAuthor: kiwi001 » Sat Dec 03, 2011 3:49 am

sweet well its cureing overnight and will test tomorrow
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Unread postAuthor: Fnord » Sat Dec 03, 2011 9:47 am

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).
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Unread postAuthor: kiwi001 » Sun Dec 04, 2011 1:04 am

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.
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Unread postAuthor: MrCrowley » Sun Dec 04, 2011 2:31 am

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.
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Unread postAuthor: kiwi001 » Sun Dec 04, 2011 3:48 am

yeah im from nz. how do i put a pic up? new to this computer thing.
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Unread postAuthor: MrCrowley » Sun Dec 04, 2011 3:50 am

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
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Unread postAuthor: kiwi001 » Sun Dec 04, 2011 4:18 am

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Unread postAuthor: jackssmirkingrevenge » Sun Dec 04, 2011 5:54 am

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.
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Unread postAuthor: kiwi001 » Mon Dec 05, 2011 2:07 am

thanks also is there sum type of reinforceing tape i can wrap the combustion chamber with to lessen damage should something go wrong?
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Unread postAuthor: jackssmirkingrevenge » Mon Dec 05, 2011 2:12 am

kiwi001 wrote: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.
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Unread postAuthor: kiwi001 » Tue Dec 06, 2011 4:39 am

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