Step 2: The ignitor.

I put mine about 8 inches from the end cap. Close enough to work on. It is a replacement barbeque ignitor that comes with a AAA battery powered ignition switch. I sealed the holes with silicone. You can bend the wire electrode until you get the gap that's right for you. On the outside, I reinforced and protected the connections with epoxy, since they are a little fragile for this application.
So cool
so what do I use that makes it explosive. Is it just the air thats pressurized?<br />
hairspray is the most common but you can use most any flammable in a spray can
&quot;GTFO you crazy kids! *Shoots at the kids* There, you happy?!?&quot;
i see i am supposed to aim it up instead of pointing it at them.
where can I buy this cannon?
you have to build it, here is a link to a basic cannon, works very well.<a rel="nofollow" href="http://dangerouslyfun.com/spud-gun">http://dangerouslyfun.com/spud-gun</a><br/>
whats a potato gun? could it be something that fires potatoes? where would i get one? Is there any way to mod this so it can fire rocks or small animals?
Make one with PVC. Yes it can fire small animals but just not your little sisters pet mouse.
how do you not know what a potato gun is
i thought they were small handguns
those are spud guns
big foot duck can explain
look at this Bad @$5 potatoe gun finn
lol haaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa haaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
look at this one, thats bad-@$5
a potato gun is a big cannon, about the same size as this cannon, but it launches potatos hundreds of feet. It is powered by a chamber full of hairspray. You stick the potato in, light the hairspray, and watch the potato burst through walls. I mad a mini one out of a chapstick container once. It was cool!
hairspray is for whimps! you need to go pneumatic if you want to go "hundreds of feet". A pneumatic potato cannon has an air chamber filled to 80-90 psi, and a sprinkler, ball, butterfly, or piston valve right after the air chamber. when you open the valve, the air pushes the projectile out the barrel.
hahahahahah wow the last line made me crap my pants laughing
i agree
I've built a <a rel="nofollow" href="http://www.awesomelicious.com/stuff/300cal">similar device</a> and found that you can nearly double the range/power by putting the container in the other way (opening facing down.) This way the air pressure will expand it, making a better seal, rather than compressing it and creating leaks around the edges.<br/>
bad @$$ potato gun
Wow! Knock the children out by embedding hard boiled sweets in there sculls, nice one! :D
For the record, I launched lollipops out of a model rocket. Yeah, I got hit in the head with one falling from 500 feet. No, I did not crack my "scull". It's friggin CANDY. There's very little momentum and it's mostly prone to shatter if it hits something firm.
not to mention the extra drag created because of the wrappers they arnt the best 4 aerodynamics
lets make candy parachutes, then we could drop them from model airplanes
lol my uncle flies thoughs
lol knock someone out with a good 15,000 feet of momentum
Nah, the candy will break before anything bad happens. The momentum will be about the same from 15,000 feet as it will from 150 feet. Candy is not very aerodynamic (Well, I suppose Tootsie Pops are pretty bullet-like) and it will have a slow terminal velocity. Combined with the small mass the momentum will be less than knock-someone-out strength. Moral: No Tootsie Pops. :P
what about jaw breakers?
yeah, try using it at a parade
I had encountered the wadding problem with my cannons as well. I found that a simple paper cup works if you mark the outside of the cup where it becomes snug in the barrel and then cut down to that point from the rim at the 12 3 6 and 9 o'clock points of the rim. Basically it functions much like a shotgun wadding and lands a few feet away.
use a beer can filled with concrete for ammo, you could probably knock down a tree or total a car
My friend used gasoline instead of hairspray and the whole gun blew up in his hand and almost sent him to the ER. Just a moral, HAIRSPRAY IS YOUR FRIEND!
I would like it if someone could build a "nice" one... one that you can do inside... and won't kill innocent bystanders...
Prrrfft. In my experience, bystanders are rarely innocent.
lol there could be a robber in a crowd dun dun dun lol
ok just question do you have to use candy?
lol, i cant try this with my gun, mine uses gas :P Mommy mommy, look! bright burning wads of candy!
oh lol! nvm. yours uses gas too XD
I was at a pep rally in my sophomore year of high-school for our homecoming football game. It was close to the end and the cheerleaders come out with candy, throwing it at the crowd. I was just waiting for my piece, when I feel a sharp pain a warm feeling over my left eye that started down my cheek. I wasn't really sure what happened, but I headed for the nurse's office. There was a 1-in cut on my eyebrow. It was shallow, but deep enough to bleed. Also, we pulled out what appeared to be a shard of glass and the nurse dropped it into a cup of alcohol. By the time we finished patching me up, it was gone... and the alcohol had a green tint. What we assume happened was that some dumb-5h17 threw a jolly-rancher at the ventilation fans. It broke and I was just lucky enough to be in its way. Ironically, 15 years earlier, I was dancing on a glass table (I was 3, give me a break) and I fell off. that gave me a cut on my right eyebrow. Now I have matching scars :-D
for your container you could put some tipe of removable lip on the end of the cannon so that it wouldn't leave the barrel but the candy would or you could put a small screw in the bottom of the cup and attach some twine on the inside of the cup and have the twine on like a reel with plenty of twine bound up so that once fired the container takes the twine and then all u have to do is reel it in a lot like fishing just with an explosive cast
lol thoes little kids ar funny "wow i never seen so much candy" ima probly build this thing it looks good for a b day party
do consider, air powered cannons are more reliable, but you need a compressor. if you have an audience waiting and your are using starter fluid, hope you have the fine art of air/fuel mixture down. i have had so many mis-fires on halloween night with kids and parents waiting. no harm in investing in building one though. they are so simple. good luck
o lol
ha. im surprised no one thought of this sooner. i used it while sitting on the roof and almost knocked this little 10 year old out( my bro).
Dude where did you get that AAA powered BBQ lighter? I'm searching high and low for one. If by any chance it was an online supplier could you let me know? A reward is offered for anyone who finds one in Australia.

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