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 Project of a Pneumatic Marble Sniper (Advices/help needed) « View previous topic :: View next topic » 
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Angel-FR
PostPosted: 11/24/2006 10:45 AM    Post subject: Project of a Pneumatic Marble Sniper (Advices/help needed) Reply with quote

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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/servlet/ProductDisplay?catalogI d=10001&storeId=10001&langId=-2&partNumber=935842&ItemHighLightId=2127 40

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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schmanman
PostPosted: 11/24/2006 10:54 AM    Post subject: Reply with quote

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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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Angel-FR
PostPosted: 11/24/2006 10:56 AM    Post subject: Reply with quote

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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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schmanman
PostPosted: 11/24/2006 11:45 AM    Post subject: Reply with quote

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

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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Angel-FR
PostPosted: 11/24/2006 12:00 PM    Post subject: Reply with quote

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

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

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


Dont worry Wink

Copper Shocked why not PVC as usual ?
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MrCrowley
PostPosted: 11/24/2006 13:22 PM    Post subject: Reply with quote

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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 Rolling Eyes
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Angel-FR
PostPosted: 11/24/2006 14:46 PM    Post subject: Reply with quote

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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 Confused
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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schmanman
PostPosted: 11/24/2006 14:51 PM    Post subject: Reply with quote

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"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. Laughing
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MrCrowley
PostPosted: 11/24/2006 15:55 PM    Post subject: Reply with quote

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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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Angel-FR
PostPosted: 11/25/2006 18:11 PM    Post subject: Reply with quote

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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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Last edited by Angel-FR on 11/25/2006 18:17 PM; edited 1 time in total
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schmanman
PostPosted: 11/25/2006 18:14 PM    Post subject: Reply with quote

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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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Angel-FR
PostPosted: 11/25/2006 18:18 PM    Post subject: Reply with quote

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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 Smile
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Infernal2
PostPosted: 11/25/2006 19:36 PM    Post subject: Reply with quote

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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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Angel-FR
PostPosted: 11/26/2006 4:57 AM    Post subject: Reply with quote

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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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CpTn_lAw
PostPosted: 11/26/2006 6:28 AM    Post subject: Reply with quote

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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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