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Project of a Pneumatic Marble Sniper (Advices/help needed)

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Project of a Pneumatic Marble Sniper (Advices/help needed)

Unread postAuthor: Angel-FR » Fri Nov 24, 2006 11:45 am

Hello,
since it epears to be the best way to make a powerfull sniper im maybe going to make one , my goal is to shot about 250 yards away (with the cannon at 45°) and to be the mots inexpensive...

so i ask for advices about the chamber and cannon size since i dont know at all about pneumatics.

to get the pression in the chamber i was thinking about this
http://www.conrad.fr/webapp/wcs/stores/ ... tId=212740

it would get a pression of 180 psi , that would be enought ?

i hope you will help me since i m stuck ^^

cya , have a good day
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Unread postAuthor: schmanman » Fri Nov 24, 2006 11:54 am

pressson? do you mean pressure? at those pressures, go with a steel piston valve. although, If this is your first cannon, a ball valve may be better.
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Unread postAuthor: Angel-FR » Fri Nov 24, 2006 11:56 am

schmanman wrote:pressson? do you mean pressure? at those pressures, go with a steel piston valve. although, If this is your first cannon, a ball valve may be better.


sorry for my english... im french ^^

does 180 psi would be enought ?
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Unread postAuthor: schmanman » Fri Nov 24, 2006 12:45 pm

oh, sorry. had I known you were from France, I would not have pointed that out. :oops:

yes , I think 180-200 psi would be enough.

are you planning on using copper for the barrel and air chambers?
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Unread postAuthor: Angel-FR » Fri Nov 24, 2006 1:00 pm

schmanman wrote:oh, sorry. had I known you were from France, I would not have pointed that out. :oops:

yes , I think 180-200 psi would be enough.

are you planning on using copper for the barrel and air chambers?


Dont worry ;)

Copper :shock: why not PVC as usual ?
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Unread postAuthor: MrCrowley » Fri Nov 24, 2006 2:22 pm

you will need sch80 PVC i believe, and in France it may be called PN18(18 BAR=260psi)



P.S France played really good in the second game against the All Blacks in the rugby last week :roll:
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Unread postAuthor: Angel-FR » Fri Nov 24, 2006 3:46 pm

ok thanks you all

so if i do a basic gun like that :

chamber => modified orbit valve => barrel

with a 180 psi compressor connected on the chamber

it would work ?
i gonna do some researsh on the forum about the best C:B ratio beceause i dont know for pneumatics...

with the hope i can find these kind of valves here :?
tomorow i will go to "Castorama" and i will look for 20 bar rated PVC and for a good valves , i will tell you what i plan to buy before i do
thanks again and sorry about being a noob :wink:

ps: All Black just f***** our players... we ***** ^^ that's bul****t ^^
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Unread postAuthor: schmanman » Fri Nov 24, 2006 3:51 pm

"sorry for being such a noob"? oh, whatever. I doubt I would be doing as good as you if I didn't speak English as my first language. :lol:
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Unread postAuthor: MrCrowley » Fri Nov 24, 2006 4:55 pm

sprinkler valves can't take 180psi only 145psi.

P.S the second game you guys played better then us even though we won. You has a solid line of defence in the first half.
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Unread postAuthor: Angel-FR » Sat Nov 25, 2006 7:11 pm

Ok guys , let go this is a schematic of what i would like to build it was very inspirated by rna_duelers sniper

5cm x 30cm pvc chamber
2 cm x 100cm barrel
on board 12v air compressor 200 psi

say me what you think
cya
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Unread postAuthor: schmanman » Sat Nov 25, 2006 7:14 pm

I like it. what is all that stuff on the bottom of the barrel? It looks good, but is it a stock or something?
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Unread postAuthor: Angel-FR » Sat Nov 25, 2006 7:18 pm

schmanman wrote:I like it. what is all that stuff on the bottom of the barrel? It looks good, but is it a stock or something?


the big black thingy ? that's the compressor as writtent on the pict :)
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Unread postAuthor: Infernal2 » Sat Nov 25, 2006 8:36 pm

Ah, an onboard compressor. It will be rather heavy. You could perhaps purchase an air compressor motor and wire it to a portable battery system. Same weight but quicker.
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Unread postAuthor: Angel-FR » Sun Nov 26, 2006 5:57 am

Infernal2 wrote:Ah, an onboard compressor. It will be rather heavy. You could perhaps purchase an air compressor motor and wire it to a portable battery system. Same weight but quicker.


i know... :/ i will see when i will buy it , if it's too munch heavy i wont take it onboard , but i would really like to have a all in one gun :/
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Unread postAuthor: CpTn_lAw » Sun Nov 26, 2006 7:28 am

You can, just make a project box...you can put the compressor in a back bag. with the hose directly connected to your sniper. Bolt design is much easer with copper....pvc in france is weak, trust me....i'm french too
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