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CO2 cartridges as projectiles

Post about things you have launched or thought about launching. Also post about various materials used for building cannons. No posts about explosive projectiles!
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CO2 cartridges as projectiles

Unread postAuthor: jackssmirkingrevenge » Sun Jul 14, 2019 4:21 pm

It's a common idea to want to shoot CO2 cartridges as self-propelled "rockets" and I've always dismissed the idea but at the urging of LeMaudit it transpires that an 8 gram Soda Stream cartridge fits almost exactly in the bore of a 12 gauge shotgun, so some quick machining later, hilarity ensured:



:D

I stand by my assertion that they are completely useless but it was still fun to try out!
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hectmarr wrote:You have to make many weapons, because this field is long and short life
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Re: CO2 cartridges as projectiles

Unread postAuthor: hectmarr » Sun Jul 14, 2019 5:31 pm

Interesting your video. I imagine a small rocket launcher :roll: , to attach at the base of some more "normal" weapon, compressed air or hybrid. :D
It is impossible to calculate the trajectory of the rocket when the target passes or is diverted by it. Body to earth without hesitation! :?
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Re: CO2 cartridges as projectiles

Unread postAuthor: Moonbogg » Sun Jul 14, 2019 7:11 pm

LOL that was funny the way it bounced off the can and flipped around in the air. Nice!
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Re: CO2 cartridges as projectiles

Unread postAuthor: jackssmirkingrevenge » Mon Jul 15, 2019 2:08 am

Thanks guys. I suppose this could merit some development with folded fins for stability, or something that directs the escaping gas at an angle to spin it up, but ultimately there's no real power in it so it's less interesting from my perspective.
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hectmarr wrote:You have to make many weapons, because this field is long and short life
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Re: CO2 cartridges as projectiles

Unread postAuthor: hectmarr » Mon Jul 15, 2019 9:10 am

In my opinion, this type of projectile needs time to accelerate, because when it leaves the canyon, the initial velocity is low, and as time passes, it increases rapidly. With a gyroscopic stabilization system or fins, or something that keeps the "nozzle" parallel to the trajectory, and an objective at a great distance, the speed would undoubtedly be much, defined by the velocity of the jet multiplied by the mass flow. It behaves in the reverse of an air weapon ammunition. :roll:
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Re: CO2 cartridges as projectiles

Unread postAuthor: jackssmirkingrevenge » Mon Jul 15, 2019 11:40 am

hectmarr wrote:In my opinion, this type of projectile needs time to accelerate, because when it leaves the canyon, the initial velocity is low, and as time passes, it increases rapidly.


Exactly, it was the same story with the Gyrojet:

Rather than inert bullets, Gyrojets fire small rockets called Microjets which have little recoil and do not require a heavy barrel or chamber to resist the pressure of the combustion gases. Velocity on leaving the tube was very low, but increased to around 1,250 feet per second (380 m/s) at 30 feet (9.1 m). The result is a very lightweight weapon.


My favorite variant of this kinetic rocket concept on a slightly larger scale is LOSAT



We won't be reaching those velocities with CO2 any time soon though :roll:
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hectmarr wrote:You have to make many weapons, because this field is long and short life
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Re: CO2 cartridges as projectiles

Unread postAuthor: hectmarr » Mon Jul 15, 2019 12:14 pm

All this excites my most intimate parts, :shock: I mean my imagination! :D
Seriously, impressive the LOSAT!
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Re: CO2 cartridges as projectiles

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Re: CO2 cartridges as projectiles

Unread postAuthor: Anatine Duo » Mon Jul 15, 2019 6:54 pm

When I tried this I had similar results. I tried adding mass to the nose, tried some poorly made fins, and I think my long barrel helped, but never got more than 150 feet (measuring straight... projectile often covered much more than that in various directions)

Perhaps with enough mass on the nose and a long enough barrel the co2 will be expended before leaving the muzzle.

The other option is to open a larger hole. I used a spring loaded spike but perhaps a guillotine style is the way to go...

Or maybe flash heating muhahahahaha!
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Re: CO2 cartridges as projectiles

Unread postAuthor: hectmarr » Mon Jul 15, 2019 7:34 pm

Anatine Duo wrote:When I tried this I had similar results. I tried adding mass to the nose, tried some poorly made fins, and I think my long barrel helped, but never got more than 150 feet (measuring straight... projectile often covered much more than that in various directions)

Perhaps with enough mass on the nose and a long enough barrel the co2 will be expended before leaving the muzzle.

The other option is to open a larger hole. I used a spring loaded spike but perhaps a guillotine style is the way to go...

Or maybe flash heating muhahahahaha!

I could try adding water, to increase the mass ejected, and therefore, the thrust.
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Re: CO2 cartridges as projectiles

Unread postAuthor: mrfoo » Tue Jul 16, 2019 12:44 am

A miniature version of my friend Anders' rocket kick?

[youtube]https://www.youtube.com/watch?v=hG0Rq-FiHBQ[/youtube]
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Re: CO2 cartridges as projectiles

Unread postAuthor: jackssmirkingrevenge » Tue Jul 16, 2019 8:37 am

mrfoo wrote:A miniature version of my friend Anders' rocket kick?



That's pretty sweet!

hectmarr wrote:All this excites my most intimate parts, :shock: I mean my imagination! :D


Ahahahaha!

For some reason I thought of the Spanish Infanta...

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Re: CO2 cartridges as projectiles

Unread postAuthor: hectmarr » Tue Jul 16, 2019 9:15 am

"Me gustan tus labios"...oh my God! :?
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Re: CO2 cartridges as projectiles

Unread postAuthor: hectmarr » Tue Jul 16, 2019 9:17 am

mrfoo wrote:A miniature version of my friend Anders' rocket kick?

[youtube]https://www.youtube.com/watch?v=hG0Rq-FiHBQ[/youtube]


A beauty of work. Collect everything you need: danger, your body involved, and pressure! :D
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