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How to: semi-auto airgun for beginners

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Unread postAuthor: reddiamondforlife » Fri Apr 27, 2012 9:39 am

Is it too much pressure for 12 meters or too little?? thats realy the last question than i go get the stuff and make some fine airsoft gun :D
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Unread postAuthor: wyz2285 » Fri Apr 27, 2012 11:22 am

120 psi is good, I would say you can start now.
Paintball tank set up isn´t too expensive, I´m pretty sure you can get a tank+reg+remote for around 60 dollars, if regulated down to 120 psi, it can dure a 1000 shots I think. You need a place to charge it through.
If you are going to charge it from your compressor, a 8 or 12 onze co2 tank+pin valve+remote will cost around 40 dollars, it would dure around 10 shots (if you charge it with co2, you will need a regulator again, but also far more shots). Not a economic option , but looks more profissional.
The cheapest way would be make a large pvc chamber or use two 2L coke bottle, they will be fine at 120 psi and will give you more shots than a co2 tank at same pressure.
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: reddiamondforlife » Fri Apr 27, 2012 11:37 am

Thank you! thats all i need to know, right now. i think i gone do the large pvc chamber, there are enough plans for that around the web and its much cheaper than a co2 tank, and since i dont have a place to charge, i will pretty much trow a way money ;) maybe on a later stage i buy a tank with reg and remote and get it filled in a scuba shop, but i dont know. i like the idea of havving everthing at home or just very common.

But thanks again for your help i now gone make that pvc chamber and the chamber for under the gun Thank you very much at the ground of my heart!
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Unread postAuthor: reddiamondforlife » Sat May 12, 2012 11:11 am

wyz2285 wrote: Simple: 1/4 male to 1/2 female reducer + 1/2 male male pipe (lenth as you like, but if you tell me the pressure you are going to use, I can give you a number.) + 1/2 female end cap.


i just got the parts and that isn't right a 1/2 inch(we have mm so 12.5mm) is already de QEV itself, so.. what do i need ?? and what is the pipe diameter??
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Unread postAuthor: Goats spudz » Sat May 12, 2012 12:20 pm

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Where's my Chuck key?

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Unread postAuthor: wyz2285 » Sat May 12, 2012 2:21 pm

I don´t live in uk :wink:
Also I have some paintball bottles.
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: reddiamondforlife » Sat May 12, 2012 2:32 pm

i also dont live in the uk, sorry but what do i need to do to make my gun D:

cause your instuctions arent correct i think... does it even mather wich diameter pipe you buy or can i just take any kind of pipe that fits with a reducer and n cap. than if so whats the formule for the volume of the chamber, so i can make it correct with the 10 cm rule you gave me....

sorry a little upsad the stores close at 6 and i had to work to 6 so i have to wait the weekend now :(
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Unread postAuthor: wyz2285 » Sat May 12, 2012 3:17 pm

What´s the size of your QEV? The one I used in the video is 1/4.
Cylinder volume= base area*length. I was refer to a 1/2 dimeter pipe, so 10cm length would be around 20ml.
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Last edited by wyz2285 on Sat May 12, 2012 3:24 pm, edited 1 time in total.
CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: reddiamondforlife » Sat May 12, 2012 3:22 pm

its defintly 1/2 (http://www.spudfiles.com/forums/files/qevebay_110.jpg) threads for the qev, maybe you got some kind of other qev ?

but i get is the pipe should be 1/2 inc 10 cm long with N cap, the reducer is for the inlet(if needed at all)
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Unread postAuthor: wyz2285 » Sat May 12, 2012 3:26 pm

So it´s just 10cm of 1/2 pipe then :wink:
Is your slide valve 1/2 as well? If it isn´t, you will need a reducer to connect it to the QEV.
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: reddiamondforlife » Sat May 12, 2012 3:28 pm

Yea it is, they fit togheter. Thanks for the help :D
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Unread postAuthor: dart guy » Tue May 21, 2013 2:51 pm

i wanted to see if you were on this fourom because i would like to ask for some desine help like how to make a compact hard hiting air gun :?
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Unread postAuthor: Jorge Espinosa » Wed May 22, 2013 5:54 pm

My Friend
I'm a new member, I am impressed with your video you were very clear with all, I'll start as soon my work allows me, This is a project that'll start with my 6 year old son so wish me luck!!

My Best
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Unread postAuthor: jackssmirkingrevenge » Wed May 22, 2013 11:15 pm

I'm sure everyone would love to have a dad like that :) suerte!
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Unread postAuthor: Jorge Espinosa » Tue Jun 04, 2013 5:26 pm

Hi Friends
I'm already start but it was a little difficult to get the slide valve,
I have clear the way to go with the air chamber, barrel and reload system but I'm lost in case of not getting the slide valve; this is a pic of the parts that so far I've been able to get and truly would appreciate any direction you can give me.


Image


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