cO2 and HPA???

[p8ntballernwpa]

Just to give you guys a little background on my little bit of knowledge.I have played paintball for a few years before I got into the whole airgunning thing and I know with paintball guns that you can run cO2 and HPA (high pressure air) through an assortment of different paintball guns and still work fine. Because they both run about the same pressure, and I know the only real thing you need to worry about with cO2 is the temp. I know that one the pain in the but things about cO2 is, the chance of freezing o-rings and breaking them.

So what I am thinking is that you could do the same thing with the QB78/79 series of air rifles. Because if they can handle cO2, then I would think they could handle HPA. Please correct me if I am wrong. The reason I ask, is because I know for a fact that HPA is a more stable gas than cO2. Then that way if I ran HPA through my newly won QB79 that it would be more consitant.

As I said that I used to play paintball and I have more than a few cO2 canisters around here and I can get a HPA tank pretty cheap.

So let me know what you guys think and please tell me what you know about the QB-79. I have read a little bit about them, what I could find around here.

Thanks in advanced,

Jesse

[leftcoast1]

QB internals can only handle 1200 psi max. If you remote is regulated to 950 psi (ballpark) you would be ok. The down fall is you have to run it off the tank all the time because the tube will only allow enough air for about 2 or 3 shoots maybe. They do build QB78 PCP that will do 2000 to 3000 psi and are deadly accurate to 50 yards generating about 850 fps at the muzzle. Just my nickels worth ( hell is it worth that much?)  By the way leave a little CO2 in the gun at all times.Less wear and tear on the seals.

[ribbonstone]

Shouldn't be a problem, the set up is like the paintball markers.  HPA tank, remote line run through a  pressure regulator.  You do end up hauling around the air tank.

Really have to work hard at cycling a bolt action single shot fast enough for freezing to be a problem, at least in warm weather....it's not really and issue. Not so hard to drop temperature enough to lower speed, although the tank fed QB79 is a lot less sensitive as it's got a much larger volume of gas to cool off.

Actually its easyer to freeze than you might think.

[IJL]

Been done Jesse and I doubt I was even close to first.
have a look at this one  

http://www.gatewaytoairguns.com/airguns/photos/photo-thumbnails.asp?albumid=18

850 fps? Can beat that & with accuracy.

Ian

[p8ntballernwpa]

thank youguys for the help and info. I just wanted to make sure, before I did anything that I would regret.

I think I might get an anti-syphon tube so there isn't any chance of cO2 liquid getting into the gone at all. If not I guess I could get a remote coil and carry the bottle around to prevent cO2 liquid getting into the gun.

[leftcoast1]

Jesse,

   CO2 guns don't work off of gas like paintball gun do you need all the liquid in the gun you can get or the gun will not fire correctly. I learned that when I first started to bulk fill. You have to flip the bottle upside down to let the liquid flow into the gun. Cycle the bolt and fire the gun about 5 times rapidly to cool the tube and get the maximum fill. The item you filling has to be colder than the source. If you are remote filling make sure you have a slide check on the disconnect and remove the coil hose. If you want I can send you some pictures of what I'm talking about. If you try to disconnect the line from the gun with out bleeding off the pressure it makes a nice loud noise. When I first did it almost blew the bottle out of my hand.

Jason

[p8ntballernwpa]

If you could that would great.So why does it need to be colder than the source?

[leftcoast1]

CO2 won't flow to a warmer direction. In a 24oz tank you only truly get about 18oz because it gets so hot. I'll take the pics after work.

[p8ntballernwpa]

So what size tanks can you fit on a QB 79? From the pictures that I have seen it looks to be only 9oz tanks that hook straight up to the gun.

[IJL]

Well I have a 4oz that fits under mine, just have to watch that the barrel doesnt touch or accuracy could well suffer.

Ian

[p8ntballernwpa]

What brand is it? Do you have any other tanks that you use? If so, what size and brand?

Thanks

[leftcoast1]

Went to wally world and picked up a 24oz  pure energy tank. I went to the paintball shop and picked up a pure energy remote line with slide check. I removed the coil line and screwed the slide check/quick disconnect right into the valve. The reason I removed the line is the waste. At first the guy at the paintball shop to me I could leave the line disconnected and the tank on. Not so the oring will only hold long enought to clean your marker you have to shut the tank off or it will blow out the oring. When you shut the tank off disconnect  the line you have all the co2 in the line still and you will at sometime have to bleed it off= waste. Maybe just me but I would like to keep as much as possible. If you are looking at the regular QB79 they use 9oz or 16oz tank mounted directly to the gun.

[p8ntballernwpa]

Yeah I have a regular QB 79 coming, I won it on another forum (airgunsmith). I am so stoked about it, never really won anything like that, even 50/50s I have never won before.

Are there any other places that other on/off valve for the paintball tanks besides ARCHER and Copper-T? Or can you use any paintball on/off valve with the QB 79?

[leftcoast1]

You don't need the on off valve. They say it saves wear and tear on the seals though I don't know being that I don't own one. You can email Archer and ask to pros and cons of the on off switch. To answer your question no I do not think a standard paintball on off valve will work unless the valve has identical threads on it. I would just wait till you get the gun and go from there.