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Basic as basic can be

A place to ask general spud cannon related questions.
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Basic as basic can be

Unread postAuthor: Joe of Loath » Fri Jun 23, 2006 3:31 pm

on the way home from school i noticed a 20ft cardboard tube. it's about 1/3" thick, an can take a tesco value (dont bother asking, im english :P ) anyway, i coevered one end with a CD and copious amounts of tape. i drilled a touch hole, and cut it to 6ft. then put a bolt through to stop the bottle going in to far. i use hair spray as a propellant. i spray it into the bottle for about 5 secs, spray down the barrel for a few seconds, and shove the bottle down to the bolt nose first (screwcap end first, no cap). i then pray through the touchhole and light it and... vwooosh... it goes 50ft in the air. is therew any way i can improve this and/or make it more powerful?

thanks,
Joe of Loath
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Unread postAuthor: djt » Fri Jun 23, 2006 4:33 pm

look into using pvc. you can make a cheap, simple combustion cannon with a lantern sparker or bbq ignitor. you will be very pleased with the results. check out the combustion cannon section on this website
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Unread postAuthor: LucyInTheSky » Fri Jun 23, 2006 4:57 pm

If your english go on http://www.uksgc.co.uk.

Also your could use lynx deoderant, i found it much better than hair spray.
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Unread postAuthor: carlbelcher » Fri Jun 23, 2006 6:19 pm

I wouldn't want to make it any more powerful. A CD isn’t very strong and I don't like the thought of flying shards of ploycarb when it blows. Look into a basic PVC combustion cannon if you want more power.
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Unread postAuthor: NeoSpud » Fri Jun 23, 2006 6:58 pm

I totally agree with Carl. When that CD blows, its going to suck to be your hand. You should probably give the cannon to someone you don't like, or to a hand model. If you're lucky, you'll be able to give it to a hand model you don't like.
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Unread postAuthor: huse_spud » Fri Jun 23, 2006 7:01 pm

carlbelcher wrote:I wouldn't want to make it any more powerful. A CD isn’t very strong and I don't like the thought of flying shards of ploycarb when it blows. Look into a basic PVC combustion cannon if you want more power.


the cd will not shatter, there is a hole in the back end (because the cd has a hole in it, barely any pressure is witheld and that's the main reason it only goes 50 ft.). and if a projectile is able to slide down the barrel like a pop bottle its not going to plug the barrel and have flames rocketing full force out the back.

do you know what pressure milk jug plastic breaks at? and that is way less solid than a cd, plus there no hole in the middle of the milk jug plastic.

if you would have messed around with a launcher similar to this you would have known, experience counts.

Joe

to make a gun worth while u should use pvc pipe like lucyinthesky said.
your current gun works ok but its just too ghetto and not worth improving, have u burnt ur hand yet? lol :lol:
maybe you were smart and didn't use a little cigarette lighter like me.
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Unread postAuthor: djt » Fri Jun 23, 2006 11:20 pm

first of all who said he didnt cover the cd hole with tape?

second of all whats a milk jug got to do with anything? (and i would rather have a milk jug split somewhere than hard sharp cd chunks flying)

and third of all if its all covered with tape then i dont think the shards are going anywhere.
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Unread postAuthor: boilingleadbath » Fri Jun 23, 2006 11:22 pm

evaluating statment "pressure containers with holes can't blow up"

Pipebombs are esentialy pressure containers which one trys to overpressure.
Pipebombs have fuseholes. Fuse holes are holes.
Pipebombs still go boom.

statment evaluated to "false"
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Unread postAuthor: Shrimphead » Fri Jun 23, 2006 11:36 pm

Haha blb. Ya I'm pretty sure he covered the hole. And I also agree that you should make a new one out of pvc.
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Unread postAuthor: Joe of Loath » Sun Jun 25, 2006 5:09 am

i covered one hole with a 2 pence peice (slightly larger than thehole in a cd), and the other just with tape. if the pressure gets to great the cd pushes out and the tabe burns through. and yes, i did use a ciggarrete lighter.. and yes i did burn my hand... my middle finger went all yellow/white with black bits and is still all crispy... but im not going to use pvc. it shatters. carboard just burns. atleast if it sets on fire i can put it out.and i did cover the cd in tape. but lynx is just to expensive. i can buy 400g of hair spray for 99p (about 1.5 dollars i think) and iused adidas but it wasnt as powerful as hair spray. and i have another bottle covered in newspaper. that is slightly to heavy, but it gives a tighter fit.

gotta go,
Joe of Loath
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Unread postAuthor: carlbelcher » Sun Jun 25, 2006 6:23 am

PVC doesn't shatter unless you use the non pressure rated. I just hope that your cardboard tube doesn't blow up in your face!
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Unread postAuthor: LucyInTheSky » Sun Jun 25, 2006 6:48 am

Still joe if your from the uk go on http://www.uksgc.co.uk
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Unread postAuthor: Joe of Loath » Sun Jun 25, 2006 9:07 am

i know, ill go to the uk one aswell, but.... im started now.
and if the tube blows up it wont be in my face because i use a long handled lighter and anyway it wolud all just come out of the touchhole or the cd at the back...
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Unread postAuthor: WOW!! » Sun Jun 25, 2006 10:38 am

carlbelcher wrote:PVC doesn't shatter unless you use the non pressure rated. I just hope that your cardboard tube doesn't blow up in your face!


Take a peics of 4" Sch40 PVC and put a 6X mix in it and tell me what happends.
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Unread postAuthor: beebs111 » Sun Jun 25, 2006 11:35 am

this isnt a debate about the use of sch40 in hybrids, maybe if you read the previous posts, and didnt try to boost your postcount by posting random crap that isnt even relavent, you would see that we are discussing pvc tubing exploding in a normal combustion, and not wether or not its safe to use carrboard tube with a 6x mix :evil: :evil: :evil:
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