My UK scavaenged cannon

Boom! The classic potato gun harnesses the combustion of flammable vapor. Show us your combustion spud gun and discuss fuels, ratios, safety, ignition systems, tools, and more.
Dave_424
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Thu Aug 02, 2007 8:01 am

This is my cannon, as i live in the UK it is next to impossible to get the "3 cleanouts so I have made a cannon from the scavenged parts from my garage. The chamber is made from a ring catcher that is under most peoples sinks that is for trapping the things that go down the plughole. Because of it's design, it has made my gun into a coaxial which makes it have a surprising BOOM! My ignition is a grill ignitor. there is a screw coupler that goes from the chamber to the barrel that just screws in.

I hope you like it and don't go on that it will blow up because all it can do is blow one of the caps off.

It shoots about 200 yards which is really surprising for its size.
let me know what you think

EDIT: I have now pressure tested it and the endcap flew off at 100psi
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Last edited by Dave_424 on Thu Aug 02, 2007 2:19 pm, edited 2 times in total.
spanerman
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Thu Aug 02, 2007 8:06 am

woooow, ghetto, you may want to use pressure rated pipe for your next one.......saftey first.....you may want to visit http://www.uksgc.co.uk for help on uk spudding matters like sourcing pipe ect....good first attempt!!
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Dave_424
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Thu Aug 02, 2007 8:16 am

cheers
i might do
but tis gun seems to hold up for the moment and i have shot out a solid iron spike out of it (a bale spike)
Dave_424
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Thu Aug 02, 2007 9:28 am

From that comment that you sent me, I watched a vid of one blowing up and i got a bit worried :)

So, i got another one chamber that i had and hooked it up to my compressor.

As the pressure built, the compressor plug on the chamber end was leaking. a bit of teflon tape fixed that.

At 110psi the end cap flew off and i almost burst my ear drum lol

Now i feel comfortable firing it because it will only reach about 50psi

thanks for the warning tho
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SnowFlox
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Thu Aug 02, 2007 11:00 am

lol !! very ghetto indeed ! i love the sink thing ! a real scrap heap challenge spudgun :D
Dave_424
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Thu Aug 02, 2007 2:09 pm

I have painted it and now it looks better

will post pics
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dauphinoise potato
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Thu Aug 02, 2007 5:06 pm

That cannon is nice so's the car :D See this cannon is the best in the world because it's made in England :headbang:
It's all a bunch of tree huggin' hippie crap!
Dave_424
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Thu Aug 02, 2007 5:52 pm

Cheers

Thanks for the apreceation
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robbo@robbo
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Wed Oct 03, 2007 5:16 am

i used a simular part for my chamber, but i ground the tube on the inside off to help combustion, it is a smaller cannon though only a 1 inch barrel, works nice though,
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