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Screwed up solvent weld; please help. Thanks

Post about things you have launched or thought about launching. Also post about various materials used for building cannons. No posts about explosive projectiles!
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Unread postAuthor: A-98 » Sun Feb 17, 2008 4:44 pm


anyway, as everybody else has said, scrap it.

this is how i do it. take pipe and lightly sand the first 4 inches or so. wipe off dust with isopropyl alcohol. take primer and apply liberally to the first 5 or so inches (on your size pipe. scaled appropriately for smaller/larger pipe).

take fitting. sand inside of appropriate pipe-receptacle. wipe clean. apply primer.

now, the hard part:

take fitting, apply cement liberally to inside of pipe-receptacle. set to side. take pipe, apply cement liberally. now, take fitting and pipe, and push together like a smokin hot girl is laying on your bed, and if you dont finish this properly, your not gonna get laid.

proven success 100% of the time *

*im not responsible if it explodes. thats your cross to bear.
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Unread postAuthor: limbeh » Mon Feb 18, 2008 5:54 am

The booby trap: simply teach some meddlers that it does not pay to mess with spudguns, especially if you dont know how it works.

Few people in my school know how a piston works. Very few know what a spudgun is; almost nobody knows what a piston spudgun is or how a piston works. No spudgunner in Singapore has yet constructed anything more complex than an unactuated ball valve cannon (i.e. chamber --> simple ball valve --> barrel). In fact, my Physics & Chem teachers came across my stuff in my classroom - power drill, 2x hacksaws, PVC glue (but no primer), couple of small ball valves, some 3" & 4" pipe & fittings - absolutely uncamouflaged - but didn't realise what these stuff would be.

So I'm making my cannon such that its easy to remove the piston &/or the pilot ball valve (a threaded one). Howver, the bicycle valve stays there, the thing otherwise looks like a normal cannon. Get the idea? Any meddler can go there and pump his head off with the bicycle pump and will never be able to shoot anything.

Was thinking if anyone could think of something more lethal, short of making the cannon into an "working" cannon and having some sucker blow the screwed up joint in his face. Fence wire is also available, my school is tearing down its old fence. After all, you need to kill one to warn a thousand (Chinese proverb)
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