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combustion cartridge prototypes

Built a combustion 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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Unread postAuthor: FeLeX » Wed Sep 05, 2007 11:07 pm

The don't highly concentrate it ;)
Calculate how much of pure oxy and how much of propane need for lets say 2x mix and measure it with a syringe and there you go.
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Unread postAuthor: Tom » Thu Sep 06, 2007 12:42 am

I think this will be my nest project, it reload's bold-action. In my country(holland) they sell a kind of schrader valve's but tou can alwys put air without pushing a piston :D .
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Unread postAuthor: FeLeX » Thu Sep 06, 2007 9:41 pm

I like your nice and simple design but the hardest part is still yet to come:
making the cartridge itself.
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Unread postAuthor: Tom » Fri Sep 07, 2007 9:41 am

Well for the cartridge i will use CPVC, for the seling on the back of the shell I will probely use 3mm thick pvc sheet. The spark gap will be the hardest part(for me :D )
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Unread postAuthor: robbo@robbo » Tue Oct 02, 2007 3:43 pm

i thought the idea of a cartrige was easy and cheapest reloading, y dont u make paper cartrages with ammo in the front that u slide in the back of a full chamber, shut the back that has the ignitor in it and lock it down, then u got possiblities of double barrel and stuff?
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Unread postAuthor: jackssmirkingrevenge » Tue Oct 02, 2007 10:12 pm

A paper catridge is hardly reloadable, plus is wouldn't give that satisfying clatter when it ejected and hit the ground :)
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Unread postAuthor: Antonio » Sat Mar 01, 2008 9:55 am

looks nice! did this shoot fast? I am wondering if I should go into the combustion business'' as it gives so much more power. But at the same time it seems so much more uncontrolable and dependent of so many factors>mix shock time etc. Jack is it really practical to start looking into combustion airguns?
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Unread postAuthor: jackssmirkingrevenge » Sat Mar 01, 2008 10:18 am

That prototype would easily put a marble through 1/4" plywood, however with combustions if you want power you have to go big. When I tried making 6mm cartridges, the power was a joke. For a small powerful cartridge it would have to be a hybrid, and that adds complication that isn't worthwhile if you don't have a machine shop and tonnes of cash.
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Unread postAuthor: dilweed » Sun Mar 02, 2008 11:56 am

lol we thought of the same idea, except mine uses a firing pin and percusssion caps!
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Unread postAuthor: ramses » Wed Sep 23, 2009 7:19 am

It also costs more, is less powerful (than an equivalent air mix hybrid), and is less available than air.

EDIT: poop, sorry for kicking, but I was linked by this delete if you feel like it.
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Unread postAuthor: jackssmirkingrevenge » Wed Sep 23, 2009 7:35 am

ramses wrote:It also costs more, is less powerful (than an equivalent air mix hybrid), and is less available than air.


... yet I was considering it as an option, never came to anything though.
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Unread postAuthor: jackssmirkingrevenge » Tue Jan 19, 2010 12:29 pm

Ok, time to breath new life into this idea. Here's an HGDT model for a buckshot round with 9 BBs, should give about the same power as a burst from a BBMG, good enough for me :)
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Unread postAuthor: JDP12 » Tue Jan 19, 2010 12:35 pm

very nice, pretty similar to mine only yours has larger cartridges,,,

Mine will be glued up as soon as my PVC cement unsolidifies and is useable...

If that works time to make it look nice and Neostead here we come...

and then many other guns of course, at least one from borderlands.... But that all is in the future, when I have more money
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Unread postAuthor: jackssmirkingrevenge » Tue Jan 19, 2010 12:43 pm

JDP12 wrote:If that works time to make it look nice and Neostead here we come...


Actually, this is what I had in mind ;) it wouldn't look bad with the massive cartridges.

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Unread postAuthor: JDP12 » Tue Jan 19, 2010 12:47 pm

Ah... very nice. Or you could go with the Mechem NTW-20

thats a 20mm beast, even bigger cartridges

Personally I'm a shotgun guy... If i get these to work pretty good, I will be making alot of gun platforms for them- probably at least one based off of a shotgun similar to one in Borderlands- a revolver style...

We shall have to see
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