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Co2 bottle hybrid.

Built a hybrid cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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Co2 bottle hybrid.

Unread postAuthor: apc » Fri Sep 04, 2009 5:22 pm

This is my first post, so please pardon any mistakes. :D

Around the beginning of the summer, i decided to start working on a hybrid. Since i didn't want to be restrained by the relatively low pressure tolerances of plastic tubing, i chose to use a 20 oz. cO2 bottle for the chamber. having a minimum rating of 1800 psi makes for a pretty solid gun.
http://www.flickr.com/photos/42244630@N08/3888331130/
http://www.flickr.com/photos/42244630@N08/3888331242/

wanting to drill as few holes in the gun as possible, i decided to tap the propane meter into the existing hole in the brass valve at the top of the bottle. (i pump the fuel and the air in through the same hole)
http://www.flickr.com/photos/42244630@N08/3888333514/
http://www.flickr.com/photos/42244630@N08/3887536947/

ignition was a problem for some time. i didn't want to have any holes drilled into the chamber, but eventually caved and just tapped a spark plug into the back of the chamber. for an ignition source, i use the electronics from the inside of a PlasmaBall. this works much the same as a stungun, giving me ignition every time without fail.
http://www.flickr.com/photos/42244630@N08/3887537123/

so far i have not been able to afford a barrel for this gun. i tried to use 3/4 inch cpvc (paintball barrel) but the barrel exploded during a 5x shot :roll:
for now, i just use a 12" piece of aluminum tube i found in my garage, unfortunately, this barrel doesn't even start to tap into the potential of the gun.
to date, i've brought the gun up to 15X, using 3 layers of aluminum pop can siding as burst disk, and no projectile


this is a little teaser video until i get my camera back. my fist shot out of the gun. no ammo, just air blast shooting into a hardcover bible. (i'm sorry haha)
http://www.flickr.com/photos/42244630@N08/3887594203/


soon to come; damage shots, videos
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Unread postAuthor: twizi » Fri Sep 04, 2009 5:31 pm

very nice like the plasma ball ignitor,never seen that before.
all those bikes in the garage but no barrel cant wait for damage
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dont play with airsofter with 1000$ gun and play with a 5 dollar pair of glasses
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Unread postAuthor: apc » Fri Sep 04, 2009 5:32 pm

here's my next project by the way :D
on the left, is another 20 oz. co2 tank, and in the middle is a large oxygen tank. very high pressure rating=very fun gun
http://www.flickr.com/photos/42244630@N08/3888411062/
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Unread postAuthor: THUNDERLORD » Fri Sep 04, 2009 5:46 pm

Welcome to SpudFiles!
And awesome first post!

My computer is slow loading all the links individually right now.
(maybe you could use photo-bucket or the other popular one for vids/pics(?)) (please).
The one vid I saw was cool though.

The rating on the CO2 aluminum tanks will be lower rapidly if an auto system is devised IMO, due to heat.

So steel tanks would be a much better choice for hybrid material or thicker aluminum pipe with welding involved... Funny thing, in some paintball shops the steel tanks are obsolete, they look at me funny when I look for bargains on them it seems. 8)
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Unread postAuthor: apc » Sat Sep 05, 2009 11:14 pm

i believe the aluminum tank will suffice for now. it's surprisingly thick walled, and built to have constant pressure held inside so we know it's built well.
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Unread postAuthor: Mr.Sandman » Sat Sep 05, 2009 11:21 pm

apc wrote:i believe the aluminum tank will suffice for now. it's surprisingly thick walled, and built to have constant pressure held inside so we know it's built well.
It depends how hot it gets inside. As you know aluminum is a great conducter of heat and since metal expands when heated......... It should be fine for now but as thunderlord said it might be a good idea to switch chambers. I personally wouldnt but it is a good idea.
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Yeah, it's that important.
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Unread postAuthor: apc » Sun Sep 06, 2009 12:29 am

since it takes about 5 minutes minimum to get the gun ready for the next shot, i don't really have to worry about overheating. it doesn't get too hot each shot, because the ignition takes place over such a short time with this small of a chamber
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Unread postAuthor: Moonbogg » Sun Sep 06, 2009 12:33 am

5 mins...daaaaaaayum. Nice gun though. Can't wait to see it shoot for real.
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Unread postAuthor: apc » Sun Sep 06, 2009 12:36 am

yeah, my compressor is on its way out, so it takes a good while even on a full charge. i need some bailout money...
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Unread postAuthor: killerbanjo » Wed Dec 22, 2010 9:21 pm

Be carfull, co2 tanks are safe at 1000psi there tested at 1800 so DO NOT TAKE IT ABOUT 1000!!! because that is very unsafe and you could risk blowing the tank
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Unread postAuthor: MrCrowley » Wed Dec 22, 2010 11:10 pm

killerbanjo wrote:Be carfull, co2 tanks are safe at 1000psi there tested at 1800 so DO NOT TAKE IT ABOUT 1000!!! because that is very unsafe and you could risk blowing the tank

Umm the tank would be fine at 1000PSI. I think CO2 can reach about 1000PSI at a mere 85*F in those 20oz paintball tanks. I think they're actually good to about 3000PSI (in no way would I recommend exceeding half this pressure though), at least I've heard that before.

Second thing, this topic is over a year old. Please check the date of the topic before posting in it. It is almost always against the rules to post in such old topics.
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