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PCP Guns

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: inonickname » Fri May 15, 2009 11:08 pm

As said, it depends on the power. Though with an average sized chamber at 100 psi sniper hero got 35 shots, and with a pistol you need less duration. So to answer, yes. Most likely, it will take some trial and error but you could probably get a reasonable number of shots.

By the way, sorry to threadjack but does anyone have ideas for a jig that can do a 1:30 turn (or similar, for rifling barrels)? Obviously allthread is wayyy too steep..

Using a jig like this:

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Unread postAuthor: maverik94 » Fri May 15, 2009 11:11 pm

ok, thanks, I think this will be a good summer project, thanks yall, it's time for me to hit the sack.
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Unread postAuthor: MountainousDew » Fri May 15, 2009 11:18 pm

maverik94 wrote:it's time for me to hit the sack.

Don't hurt your hand...
I'm sorry, I couldn't resist even though it isn't the best one I could have came up with...
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Unread postAuthor: Gippeto » Fri May 15, 2009 11:22 pm

MountainousDew wrote:
maverik94 wrote:it's time for me to hit the sack.

Don't hurt your hand...
I'm sorry, I couldn't resist even though it isn't the best one I could have came up with...



It's not his hand he should be worrying about. :lol:
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Unread postAuthor: SPG » Sat May 16, 2009 3:46 am

far_cry wrote:why where are you from Syria :idea: :idea: cuz they the only country that have internet but very slow


No if he was in Syria he'd just go buy an AK47 for $20. Seriously there's loads of places too far away from a telephone exchange to get broadband.

Don't forget with any PCP each shot will drop the pressure in your reservoir tnak. So to get consistancy you'll either have to have a big tnak, a very high pressure tnak, or a regulator, or any combination of the above. Personally I'd go for a big tnak, then a regulator with a small expansion chamber before the hammer valve.
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Unread postAuthor: sniper hero » Sat May 16, 2009 3:56 am

with a hammer valve you can get plenty of shots

why not make a kind of revolver? hammer valve hit by a hammer like in a real revolver and somekind of revolving magazine
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Unread postAuthor: alwinovich » Sat May 16, 2009 4:03 am

SPG wrote:
far_cry wrote:why where are you from Syria :idea: :idea: cuz they the only country that have internet but very slow


No if he was in Syria he'd just go buy an AK47 for $20. Seriously there's loads of places too far away from a telephone exchange to get broadband.

Don't forget with any PCP each shot will drop the pressure in your reservoir tnak. So to get consistancy you'll either have to have a big tnak, a very high pressure tnak, or a regulator, or any combination of the above. Personally I'd go for a big tnak, then a regulator with a small expansion chamber before the hammer valve.


tnak? tnak!
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Unread postAuthor: alwinovich » Sat May 16, 2009 4:21 am

i myself made a 800 psi CO2 pcp from the blowgun and a schrader pellet gun setuphttp://www.spudfiles.com/forums/viewtopic,p,225533.html#225533(yes they hold up) and a small hammer plus a spring
the valve in a blowgun has exactly the same workings as the ones on commercial guns
i also own a commercial pcp, the Benjamin Discovery
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Unread postAuthor: maverik94 » Sat May 16, 2009 10:21 am

well, I came up with a simple design. All it is is a chamber, 3/4" wide, 5" long. That screws into a "t" piece. That is where the valve is. The top of the "t" goes into the barrel. the only problem is triggering the hammer, the part that you push in on is at the opposite end of the grip than the trigger, hmmmmm.
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Unread postAuthor: maverik94 » Sat May 23, 2009 11:24 am

do you think this shock pump would be good for charging up a pcp pistol with a 5" long 3/4" diameter chamber pcp pistol?
http://www.amazon.com/Inline-Pressure-Shock-Gauge-128507/dp/B000A2QIAY/ref=sr_1_32?ie=UTF8&s=toys-and-games&qid=1243027806&sr=8-32
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Unread postAuthor: Carlman » Sat May 23, 2009 12:22 pm

Would be fine mate, or try a fridge compressor.
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Unread postAuthor: Brian the brain » Sat May 23, 2009 5:54 pm

the only problem is triggering the hammer, the part that you push in on is at the opposite end of the grip than the trigger, hmmmmm.


Don't tell me you' ve missed this:
http://www.youtube.com/watch?v=qZgZghV7iTg

a hammer is the easiest part.
Just two parts...hammer...and trigger.
When the hammer is cocked, the trigger blocks it.
Pull the trigger and the hammer is released.
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Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
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Unread postAuthor: maverik94 » Sat May 23, 2009 10:25 pm

nice vid, any chance of cutaway designs?
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Unread postAuthor: inonickname » Sat May 23, 2009 10:30 pm

maverik94 wrote:nice vid, any chance of cutaway designs?


Dude. It's as simple as you get. Main valve is a QEV. A hammer valve vents a small portion of air from the QEV. A springloaded hammer strikes the valve stem, venting some air. A sear holds back the hammer.

It's not hard. I sure hope you understand how a sear works though..
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Unread postAuthor: maverik94 » Sat May 23, 2009 10:34 pm

why would you even use the qev, wouldn't just havng the hammer valve work?
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