Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 56 users online :: 4 registered, 0 hidden and 52 guests


Most users ever online was 155 on Mon Aug 15, 2016 1:40 am

Registered users: Bing [Bot], Google [Bot], MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

full auto QEV + relieve valve bullpup. with CO2 *UPDATE*

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.
Sponsored 
  • Author
    Message

full auto QEV + relieve valve bullpup. with CO2 *UPDATE*

Unread postAuthor: Cosmic Muffin » Tue Sep 13, 2011 7:32 am

ok so this is my plan, ive bought a 1/2 in QEV, 8mm braided line and push to connect 1/2in fittings, and a pressure washer gun off ebay. ive also bought a soda stream bottle, rekos it has 3470psi in it. and if the co2 idea goes ahead ill have to buy the adapter off ebay as well. barrel is 12cm i think, whatever marble size is anyway ;) as thats the ammo. The QEV will be piloted by the popoff which is going to be set to release at 175psi. and the braided line i got is rated for 175, so is that safe to use do you think? and with the co2? i know ill need to get a regulator.. or do i?

<a href="http://tinypic.com?ref=29wwuq8" target="_blank"><img src="http://i55.tinypic.com/29wwuq8.jpg" border="0" alt="Image and video hosting by TinyPic"></a>

planning to assemble it like so. im having trouble finding ideas for the loading mech, as its going to be full auto and with a hell of a firing rate. maybe detent or oring? i made a quick sketch of a magazine there.

so will it work without me loosing my arms and possibly face?
ta
  • 0

Last edited by Cosmic Muffin on Thu Sep 29, 2011 8:14 am, edited 1 time in total.
User avatar
Cosmic Muffin
1st Lieutenant
1st Lieutenant
 
Posts: 275
Joined: Mon Jan 14, 2008 10:30 pm
Location: arse end of nowhere
Reputation: 0

Unread postAuthor: wyz2285 » Tue Sep 13, 2011 8:06 am

well blow forward bolt it´s the most reliable reloading system, but if the ROF is too high it may not have enough time to react :roll: . With marbles you really don´t need a high ROF, unless you want a .50 machine gun :wink:
  • 0

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
User avatar
wyz2285
Major General
Major General
 
Posts: 2244
Joined: Sat Mar 06, 2010 7:50 am
Location: Porto, Portugal
Country: Portugal (pt)
Reputation: 12

Unread postAuthor: Cosmic Muffin » Tue Sep 13, 2011 8:59 am

I dont want a high rate of fire really, it would be hard to design a proper feeding system, and I don't have many tools at my disposal. I'd have to adjust the pop off valve and flow from the washer gun to get it to the ROF I want. What do you think?
  • 0

User avatar
Cosmic Muffin
1st Lieutenant
1st Lieutenant
 
Posts: 275
Joined: Mon Jan 14, 2008 10:30 pm
Location: arse end of nowhere
Reputation: 0

Unread postAuthor: wyz2285 » Tue Sep 13, 2011 9:17 am

its going to be full auto and with a hell of a firing rate.
:wink:
You should put a regulator on the sodastream bottle, set the pressure to about 300 psi, reduce the air flow form the washer gun or use a blowgun(should holds 300 psi). The pop off valve works at 175 psi is ok I think, but you would need a bigger chamber for the qev(marbles are heave) or you could use paintball, they are cheaper and safer :)
  • 0

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
User avatar
wyz2285
Major General
Major General
 
Posts: 2244
Joined: Sat Mar 06, 2010 7:50 am
Location: Porto, Portugal
Country: Portugal (pt)
Reputation: 12

Unread postAuthor: Cosmic Muffin » Tue Sep 13, 2011 9:30 am

yeh i have been hunting for one, but i dont know which one ill need, and they are all damn expensive. and paintballs im pretty sure aren't available to the public here. i think you need a specific paintball license :?:
  • 0

User avatar
Cosmic Muffin
1st Lieutenant
1st Lieutenant
 
Posts: 275
Joined: Mon Jan 14, 2008 10:30 pm
Location: arse end of nowhere
Reputation: 0

Unread postAuthor: wyz2285 » Tue Sep 13, 2011 9:39 am

So does here, but when you buy them online nobody cares :lol:
  • 0

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
User avatar
wyz2285
Major General
Major General
 
Posts: 2244
Joined: Sat Mar 06, 2010 7:50 am
Location: Porto, Portugal
Country: Portugal (pt)
Reputation: 12

Unread postAuthor: jackssmirkingrevenge » Tue Sep 13, 2011 11:23 am

Simple tee magazineworked great for BBs for me, not so good with pellets though. For marbles, important you have a good spring.

The important thing is that the end of the mag where the BBs enter the barrel is as close to the BB diameter as possible.
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Sponsored

Sponsor
 


Unread postAuthor: Crna Legija » Wed Sep 14, 2011 1:55 am

If you can, get some other ammo, i made my semi for marbles and they just suck you can find a barrel that fits them well(coz their inconstant) and they break easy. I don't even use it much now because the bloody marbles.
  • 0

'' To alcohol... The cause of, and solution to, all of life's problems.”
--Homer Simpson

Add me on ps3: wannafuk, 8/11/11 cant wait
User avatar
Crna Legija
Major General
Major General
 
Posts: 2333
Joined: Sun Jul 20, 2008 5:14 am
Location: australia
Reputation: 0

Unread postAuthor: Cosmic Muffin » Wed Sep 14, 2011 6:49 am

I think I'll make some sort of blow forward bolt. And get the ROF to about 5 shots per second? Ill investigate the tee idea first though. Cheers guys what ammo would ou suggest?
  • 0

User avatar
Cosmic Muffin
1st Lieutenant
1st Lieutenant
 
Posts: 275
Joined: Mon Jan 14, 2008 10:30 pm
Location: arse end of nowhere
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Wed Sep 14, 2011 6:54 am

Can you get 3/8" slingshot ammo?
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Unread postAuthor: jackssmirkingrevenge » Wed Sep 14, 2011 6:55 am

Can you get 3/8" slingshot ammo?
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Unread postAuthor: Cosmic Muffin » Thu Sep 15, 2011 3:00 am

I'm sure I could if I shopped around, eBay would be the way to go I'm sure, I have no idea of knowing if Its going to be a snug fit in the barrel though
  • 0

User avatar
Cosmic Muffin
1st Lieutenant
1st Lieutenant
 
Posts: 275
Joined: Mon Jan 14, 2008 10:30 pm
Location: arse end of nowhere
Reputation: 0

Unread postAuthor: daniel0663 » Thu Sep 15, 2011 3:40 am

Have you checked your local gun store? they have those little packets of 3/8" steel balls which have a 75 count, for around $15-16 NZ in my local store.

Ebay, is cheaper to some extent...
http://www.ebay.com/itm/Slingshot-Ammo-3-8-Steel-Shot-Balls-150-qty-/180611673236#ht_1280wt_1395
  • 0


daniel0663
Sergeant First Class
Sergeant First Class
 
Posts: 131
Joined: Wed Dec 15, 2010 10:57 pm
Location: New Zealand
Reputation: 0

Unread postAuthor: jazzman56 » Thu Sep 15, 2011 3:44 am

You can get slingshot ammo in all states of AUS as listed buy this site.

http://www.outdoorswarehouse.com.au/products/Marksman-Steel-Slingshot-Pellets-9.5mm.html
  • 0


jazzman56
Specialist
Specialist
 
Posts: 53
Joined: Wed May 11, 2011 4:52 am
Reputation: 0

Unread postAuthor: Cosmic Muffin » Sat Sep 17, 2011 9:23 pm

Cheers guys :) just realized the washer handle I got has the wrong thread size! So bummed! Now I'll have to modify the thread -.-
  • 0

User avatar
Cosmic Muffin
1st Lieutenant
1st Lieutenant
 
Posts: 275
Joined: Mon Jan 14, 2008 10:30 pm
Location: arse end of nowhere
Reputation: 0

Next

Return to Pneumatic Cannon Discussion

Who is online

Registered users: Bing [Bot], Google [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'