this is my first combustion cannon.
I come from germany and here its hard to buy the parts. Because they look pretty concerned if a teenager buys a bunch of pvc pipes.

I think you can see how it works on the Pics
but if you have any questions just ask me.
some info:
the barrel is ~100 cm long and the diameter is ~5 cm
the whole chamber is ~50 cm long and the dia. is ~15 cm
the ignitor is from a lighter with ?brazed? cables to the screws
I´ll add a vid and some destruction pics later.
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Here is a vid i made rrecently
[youtube][/youtube]