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combustion paintball?

Post questions and info about combustion (flammable vapor) powered cannons here. This includes discussion about fuels, ratios, ignition systems, safety, and anything else relevant.
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combustion paintball?

Unread postAuthor: newkidspudster » Mon Jan 01, 2007 1:11 pm

I need to know if its possible to make a combustion paintball gun,? or will the paintball pop?
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Unread postAuthor: MrCrowley » Mon Jan 01, 2007 2:42 pm

it probably is plausable but why would you,just go with pneumatic.It wouldn't be very poerful either.
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Unread postAuthor: Bluetooth » Mon Jan 01, 2007 3:21 pm

Yeah it would work :D .
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yup

Unread postAuthor: keep_it_real » Mon Jan 01, 2007 3:33 pm

I've done it and it worked really well. It was pretty powerful too. Just keep the chamber sorta small.
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Unread postAuthor: jrf155 » Mon Jan 01, 2007 4:06 pm

my friend made a paintball barrel for his combustion cannon and it worked really well. He used a 3/4 " pvc for the barrel and the paintball was not a perfect seal but it still worked well.
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Unread postAuthor: Insomniac » Mon Jan 01, 2007 5:07 pm

Well the tippmann C-3 is a pump action combustion gun, and it works well enough to sell so it is possible if you know what you are doing.
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Unread postAuthor: PVCMAN » Sat Jan 13, 2007 9:21 pm

Does anybody have or know were I could get pvc that would fit a paintball in it? I would apreciate it.
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Unread postAuthor: MrCrowley » Sat Jan 13, 2007 9:44 pm

3/4" PVC or CPVC is usally a good bet, Next time search it,its been covered many times on this forum.
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Unread postAuthor: SpudBlaster15 » Sun Jan 14, 2007 12:48 am

Paintballs fit in 3/4" CPVC, 3/4" Sch 120 PVC, and 1/2" Sdr 21 PVC, with 1/2" Sdr 21 having the best fit.

3/4" CPVC = .695"
3/4" Sch 120 PVC = .69"
1/2" Sdr 21 PVC = .685

Paintball = .68"
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Unread postAuthor: pyrogeek » Sun Jan 14, 2007 2:50 am

Paintballs are not always exactly .68cal. Different brands will run small or large, and the moisture content will also affect the size. Anyway, if you want to use it for paintball, you would probably be better off using a stock barrel off a Spyder. At least that was meant for shooting paintballs.
And yes, if the Tippman C3 can be used for paintball, it must be able to reach a pretty high velocity. It must at least get close to 300fps, if not capable of more.

I was thinking of making a combustion pump action. But, the design I wanted to use would probably require more sophisticated tools and parts than I would have access to. Basicly, I wanted to have the chamber be basicly like a bike pump. A ram will have a disc and at one end of the chamber will be a one way valve. You pull the ram and it brings in fresh air, and exhausts the old out the barrel. Then there would be a propane meter that would release a small amount of gas electronically when you push the ram back in place. And of course the ram would also have to let another ball in, which could be done like 2 ways. Either directly connect the ram you push/pull to vent the gun to a bolt, or a switch could trigger a solenoid to open and close the bolt.
I just figured a cheap Spyder blowback would be faster and more reliable, so I abandoned the idea. The only way you could make a semi auto or full auto would be to use big rams to exhaust the gun, or to meter oxygen also. And that would be dangerous, and bulky. Or, I guess you could have 2 chambers and one would fire, which would provide pressure to power a ram that would push a piston through the other chamber and vent it. But, then you would have 2 chambers, a couple rams, and other junk. It just doesn't seem practical. It would be complex, heavy, and bulky. Plus, you would need like 2 hoppers or to split the feed up which I would assume could cause feed issues or would make it hard to clean if you chopped a ball. Also, with the addition of eyes like many new guns have, it would require the circuit to be timed exactly to the firing order of the gun. Although, I guess that could be solved.
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Unread postAuthor: mark.f » Sun Jan 14, 2007 9:53 am

3/4" aluminum hydraulic tubing, (rating 190 PSI), has a .68" inner-diameter. Just use a 3/4" compression nut to connect to the gun.
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Unread postAuthor: Antonio » Thu Jan 31, 2008 8:36 am

The Tippman C3:
Image This gun is said to be many times more efficient than a air supplied tippmann.
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Unread postAuthor: Hotwired » Thu Jan 31, 2008 8:49 am

Depends what you mean by efficient but it does get a hell of a lot more shots per tank of propellant than any other marker type.

Downside it is it has to be a pump action to cool the marker enough to prevent the components from getting too hot.
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Unread postAuthor: Ragnarok » Thu Jan 31, 2008 10:24 am

Hotwired wrote:Downside it is it has to be a pump action to cool the marker enough to prevent the components from getting too hot.

I thought it had to be a pump action because they had to use it to drive a pump as a method to vent the chamber quickly enough, because they didn't have any other way - not because of overheating.

They don't currently even have any way to make a working prototype in semi as I understand.
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Does that thing kinda look like a big cat to you?
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Unread postAuthor: Hotwired » Thu Jan 31, 2008 1:06 pm

As I understand it can't go above 3 bps or it will overheat, which is a serious issue if you're after semi-auto or auto.
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