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Posted: Tue Jul 03, 2007 8:18 pm
by noname
I used cardboard for my first 4 or 5 combustion cannons, along with hairspray and a match for ignition! Am I dead? NO! I'm just insane, or is it stupidity? It's fun though, so whatever. They have blown out the touch hole a few times though.....

Posted: Tue Jul 03, 2007 10:10 pm
by frankrede
Hmm I had a cardboard tube about 3.5" inner diameter with 1/2" thick walls.
It was really hard too.

Posted: Wed Jul 04, 2007 7:39 am
by Hotwired
athoul wrote:
Hotwired wrote: You'd need something to bulk out the size of the barrel to fit in the chamber...

..Use remote ignition and don't let it get wet (no potatos) :wink:
Could you explain the bulking out the barrel in a bit more detail with a diagram if you can be bothered :D
Cut out a wooden disk of perhaps an inch thick and glue it inside the chamber for a cap and a doughnut shaped ring to form the bushing to fix the barrel inside the chamber.

Barrel glues into inner ring and the outer surface of the ring is glued into chamber.

Posted: Wed Jul 04, 2007 11:53 am
by SnowFlox
wood is a nice idea !

Posted: Wed Jul 04, 2007 2:14 pm
by hi
i made one out of a cardboard shipping ttube and wrapped it in duct tape and it worked like a charm. never failed. it launched soda cans and used axe for propellent.

Posted: Wed Jul 04, 2007 8:34 pm
by VH_man
to make the cannon 100% cardobard you could use cardboard disks as the rear part................ and use 3 nails protruding into the rear of the cannon to hold the cap in place. to re-fire, just pull the nails out, and wala. then slap the endcap in again, and push the nails into it again.

Posted: Wed Jul 04, 2007 11:32 pm
by deathholm
Or you could just use pringles cans glued together


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Posted: Wed Jul 04, 2007 11:59 pm
by pyromanic13
toilet paper roll fits ping pong balls...just need a long nose lighter and some duct tape and you're set.

Posted: Thu Jul 05, 2007 12:36 am
by Redcoat
if its like the poster cardboard or the stuff you have posted there then yes i'd say it's plausible.

Posted: Thu Jul 05, 2007 7:15 am
by bucky242
it takes a while for card board to catch fire well mor than five seconds you could even make a system of switching out tubes faster loading
disposable great idea

Merged:

I made one we (me and my friends) were at a friends camp site and I was telling them about my spud cannon. They have never heard of one so I said "I could make one," I had a lantern lighter, (I was at this camping store and saw the lantern lighter and said I needed it) a paper towel tube, (I believe they've been there for a couple weeks) and some bug spray. They had a plastic tray for some muffins, that was made out of clear plastic so used that as the end cap and since its a vapor you don't need a seel. Used scotch tape to hold it together, and it was beautiful. When I fired it made this wonderful roaring boom and didn't burn it. I will post some pictures soon...