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Building an airsoft-like cannon and would like help

A place to ask general spud cannon related questions.
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Building an airsoft-like cannon and would like help

Unread postAuthor: GhostMonkey » Fri Jun 02, 2006 1:33 am

hey wasup everyone ... my first few guns were pnuematic and used bicycle pumps cause i really didn't wanna blow myself up .. so then after i got use to that i went up and tried a CO2 tank powered one but didn't have the right thingy so i did kinda blow myself up but that's all over so i'm building this cannon that's works in the same way as some airsoft guns ... this is the basic stuff for people who don't know ...
____________________________
.\.spring\....|............ )................|
..\....../..\...|.............).................|_______________
...\..../....\..|.(piston).)...air......... _0<-- projectile....|
....\../......\.|.............)...chamber.|
....\/.........\|.............)................|

ok so ... you pull back the piston (somehow) and then you let it loose (somehow) and all the air in the air chamber should compress really really fast so that it will send the projectile (what ever it will be) out really fast

don't worry that's just the basic stuff for now .. i'll improve on it when i'm ready to build it ... but i'm not sure what to use as a piston for a 1" pvc pipe ... Can anyone give me some ideas? cause i don't think home depot goes around selling those ...

p.s. if you noticed i don't really know how to post pictures ... soo i made one .. and i added all those periods because ... well i don't know how to explain but they're NEEDED ... like your help .. it's NEEDED
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Last edited by GhostMonkey on Fri Jun 02, 2006 12:04 pm, edited 1 time in total.
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Unread postAuthor: Urban Ninja » Fri Jun 02, 2006 2:42 am

if you want to make an airsoft kind gun go to http://www.boltsniper.com. although his are made for nerf projectiles it will be very easy to just change the barrel size.
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Unread postAuthor: Atlantis » Fri Jun 02, 2006 1:47 pm

try a 3/4" Encap or a 1/2" Encap. One of those might fit. Your gonna need O-Rings with this though.
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Unread postAuthor: djt » Fri Jun 02, 2006 2:30 pm

hah dude no way i just thought of that same thing. if the spring can be pushed down with your weight just have a little pole stick out and turn it upright and push it down with your foot. with really powerful springs you could rig up some gears or a hand winch.
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Unread postAuthor: Benny » Fri Jun 02, 2006 6:54 pm

i have made so many spring piston guns its not funny, and you need a hopup or a very tight barrel or it wont shoot over a metre.
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Unread postAuthor: SpudStuff » Fri Jun 02, 2006 7:16 pm

you should just use a cloud bbmg and a paintball co2 tank for portible air.
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Unread postAuthor: boilingleadbath » Fri Jun 02, 2006 10:33 pm

I'm not sure how I'd do the pull-back mecanism, but would epoxying a segment of plastic cord to the back of the piston be an option?

Anyway, I have a bag of nice Viton 1/8"x1" O-rings, and some 1.125" CPVC round stock. I could make you a nice piston for a small fee... (don't ask about large pistons. Large pistons have large fees.)
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Unread postAuthor: GhostMonkey » Fri Jun 02, 2006 11:38 pm

thanks for the advice guys but

it's ok i'm going to make my own piston .. thanks though ..
i figured out a way to pull the piston back ..
what do you (Benny) mean by hopup
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Unread postAuthor: djt » Sat Jun 03, 2006 10:01 am

its a little piece of rubber that puts a backspin on a projectile to make it fly straighter and farther. i dont think this would work on anything but a perfectly round object though.
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Unread postAuthor: GhostMonkey » Sat Jun 03, 2006 11:07 am

OOOOO!!! ... now i remember .. yeah .. lol i already knew that ... where can i find one then ?
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Unread postAuthor: )DEMON( » Sat Jun 03, 2006 2:06 pm

you make one for your barrel, a small piece of duck tape should be sufficient.
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Unread postAuthor: GhostMonkey » Sat Jun 03, 2006 2:12 pm

.... yeah ... now i'm confused ... duck tape? do you mean put it on the top side of the barrel and that will create the backspin?
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Unread postAuthor: Mihlrad » Sat Jun 03, 2006 5:46 pm

Urban Ninja wrote:if you want to make an airsoft kind gun go to http://www.boltsniper.com. although his are made for nerf projectiles it will be very easy to just change the barrel size.


omg those guns are badass...wish i could make something like that >.<
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Unread postAuthor: )DEMON( » Sun Jun 04, 2006 1:50 am

GhostMonkey wrote: do you mean put it on the top side of the barrel and that will create the backspin?


thats how they work , bbs will spin with duck tape on the top of your barrel
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Unread postAuthor: Benny » Sun Jun 04, 2006 2:17 am

yes, i agree, the weapons on boltsniper are sweet....... and they shoot foam! :(
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