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preloaded pneumatic cartridge

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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Unread postAuthor: iknowmy3tables » Fri Feb 19, 2010 2:18 pm

hey, today I've learned a little somthing about some toy nerf guns, the not that un-popular Nerf hornet and the less popular but wonderfully exploitable big salvo basically are mini qevs and chambers, and they're small and light, if you can attach some schraders to the back of some hornet barrels and put in smaller barrels, price wise a hornet has 6 barrels and costs $20 thats not that bad, if anything they should be easily exploited for other pneumatics
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Unread postAuthor: zomgwtfbbq » Tue Feb 23, 2010 8:50 am

AFTER 2 YEARS OF NATIONAL SERVICE (ARMY), I AM BACK.

Glad to see you guys are still alive and kicking! I haven't much browsed the forum in detail, but I was wondering if there were any breakthroughs in semi-auto pneumatics?

The most promising prototype I could remember was from jackssmirkingrevenge, but that was 2 years ago.

IT'S DEFINITELY NICE TO SEE YOU GUYS AGAIN.

P.S. This thread is still alive after 2 years! :D
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Unread postAuthor: jackssmirkingrevenge » Tue Feb 23, 2010 9:56 am

Glad you're still alive considering the reason for your absence ;)

zomgwtfbbq wrote:I was wondering if there were any breakthroughs in semi-auto pneumatics?


I made *some* progress, have a look at these :)
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Unread postAuthor: john bunsenburner » Tue Feb 23, 2010 11:30 am

Well, i don't know you, but nice to have you back on board. I'm trying my hand at semi mechanisms, have a look here
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Unread postAuthor: SEAKING9006 » Wed Feb 24, 2010 6:40 pm

I remember that cartridge test, that was done back in 2006 when I was just a starry-eyed freshman with dreams of shoulder-held autocannons for paintball wars.

Takes me back, man. =)
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Unread postAuthor: jackssmirkingrevenge » Sun Jul 24, 2011 5:27 am

Having a play with a valveless preloaded cartridge, stuck a schrader in the back and waiting for it to cure.
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Unread postAuthor: LovableAirGuns » Sun Jul 24, 2011 5:53 am

AFTER 2 YEARS OF NATIONAL SERVICE (ARMY), I AM BACK.

Glad to see you guys are still alive and kicking! I haven't much browsed the forum in detail, but I was wondering if there were any breakthroughs in semi-auto pneumatics?

The most promising prototype I could remember was from jackssmirkingrevenge, but that was 2 years ago.

IT'S DEFINITELY NICE TO SEE YOU GUYS AGAIN.

P.S. This thread is still alive after 2 years!


Buy a QEV and a 3 way valve and you have semi auto i will be posting my semi auto gun tomorrow with a vid so take a look when you have the time
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Unread postAuthor: Crna Legija » Sun Jul 24, 2011 6:06 am

Is that a triggered cartridge? also what's stopping air leaking passed the pellet.
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Unread postAuthor: jackssmirkingrevenge » Sun Jul 24, 2011 6:14 am

Crna Legija wrote:Is that a triggered cartridge?


Yep, push the collar back and bang! That's the theory at least.

also what's stopping air leaking passed the pellet.


Pressure inflates soft lead skirt and seals, like it had done here.
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Unread postAuthor: Crna Legija » Sun Jul 24, 2011 7:15 am

jackssmirkingrevenge wrote:Pressure inflates soft lead skirt and seals, like it had done here.


ahhh that makes it much simpler :lol:
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Unread postAuthor: jackssmirkingrevenge » Sun Jul 24, 2011 8:22 am

Here's the first tentative test at 50 psi. The issue here is that ideally, you should load the pellet head first and the skirt gets swaged down for a good seal, in this case loded skirt first it doesn't really work so I had to add a rubber disk to make it seal. This unfortunately added a bit of friction so it didn't fire immediately, in fact you can see me pulling away thinking it wasn't going to fire before the pellet pops out.

[youtube]http://www.youtube.com/watch?v=F9Tpn8rd1Tk[/youtube]
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Unread postAuthor: warhead052 » Sun Jul 24, 2011 8:32 am

Awesome! It looks pretty good.
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Unread postAuthor: LovableAirGuns » Sun Jul 24, 2011 9:46 am

saw that just before good job man :D
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Unread postAuthor: jackssmirkingrevenge » Sun Jul 24, 2011 4:07 pm

Here it is at 100 psi, looks promising enough to make a "proper" prototype and take it to higher pressures, maybe with moar balls for support, and perhaps some silicon tubing to improve sealing...

[youtube]http://www.youtube.com/watch?v=OqJjD0_FLGE[/youtube]
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Unread postAuthor: warhead052 » Sun Jul 24, 2011 4:11 pm

Wait, so if you pull back on it, how are you going to make a gun that will actually use them? Some sort of pneumatic piston that pushes them forward or something?
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