"valveless" cartridge concept

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jackssmirkingrevenge
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Sun Nov 07, 2010 11:13 pm

Ragnarok wrote:Well, if you're only looking for a few holes in a fairly modest target and some brass flying off, then what you've got will suffice
Realistically, even with a locked breech, given the calibre and size it's not going to be more than that, but it's enough for my purposes :)

For better power I'm best off developing the hybrid cartridges further, which would also remove the need for an on-board air supply.

edit: a-a-a-a-almost there :) but the flimsy magazine broke, moar Araldite!

[youtube][/youtube]

edit 2: here's the shot that wrecked the magazine, fail but I love the spent cartridge flying out dangerously close towards the camera (and actually hitting the tripod...) :D

[youtube][/youtube]

I encased the base of the magazine in epoxy in the meantime, more testing tomorrow :)
Last edited by jackssmirkingrevenge on Sun Nov 19, 2017 7:26 am, edited 1 time in total.
hectmarr wrote:You have to make many weapons, because this field is long and short life
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jackssmirkingrevenge
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Tue Nov 09, 2010 11:55 am

WIN!!!!!

[youtube][/youtube]

Now to modify another cartridge to see if it will go full auto :D
Last edited by jackssmirkingrevenge on Sun Nov 19, 2017 7:26 am, edited 1 time in total.
hectmarr wrote:You have to make many weapons, because this field is long and short life
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Gun Freak
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Tue Nov 09, 2010 12:15 pm

YESS!!! :D
Did you fire the second one? Was it even loaded?
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jackssmirkingrevenge
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Tue Nov 09, 2010 2:06 pm

HAHAHAHAHA!!!!

WIN!!!!!!

[youtube][/youtube]

With constant airflow, it not only rechambers a new round but fires it too :D

Very reliable too, works every time! Here it is from various other angles at 420 frames per second :)

[youtube][/youtube]

The plan now is to modify a couple more carts for some longer bursts, then make a "proper" launcher without the ghetto breech and mag substituting rubber bands for springs etc.

Ah, the clatter of spent brass, you should see the grin on my face :D
Last edited by jackssmirkingrevenge on Sun Nov 19, 2017 7:28 am, edited 3 times in total.
hectmarr wrote:You have to make many weapons, because this field is long and short life
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Gippeto
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Tue Nov 09, 2010 2:21 pm

jackssmirkingrevenge wrote:Ah, the clatter of spent brass, you should see the grin on my face :D
We could if you weren't so camera shy... :wink:

Congrats Jack! :D
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Gun Freak
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Tue Nov 09, 2010 2:33 pm

Ahhh SUCCESS. Great job!!! How about a real time video? How fast is the ROF? How loud is each shot? How's the power? :lol: hehe this is sick, hopefully it will work again when you make the proper model. :)
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Tue Nov 09, 2010 3:02 pm

awesome!! congrats JSR!
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POLAND_SPUD
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Tue Nov 09, 2010 3:07 pm

you has ejecting cartridges!! :wink:
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Tue Nov 09, 2010 4:31 pm

The failparade is over!! :D Congrats Jack!
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Gun Freak
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Tue Nov 09, 2010 4:32 pm

Hey Jack the second video still isn't working, there was probably an issue during uploading.
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Tue Nov 09, 2010 5:04 pm

Gun Freak wrote:Hey Jack the second video still isn't working, there was probably an issue during uploading.
You Tube wrote:This video is not yet processed.
Is there music in the second video? They cross check them if so...

Nice win Jack.
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Tue Nov 09, 2010 5:08 pm

jrrdw wrote:
You Tube wrote:This video is not yet processed.
It doesn't take 3 hours to process normally.
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Tue Nov 09, 2010 6:41 pm

Well done, good to see some dakka dakka with brass.

I even stopped being a tight ars3 and watched the video.

Could you adapt a FN FAL mag or any other 7.62 X 54 mag and use that to feed it?

You'll have to choose a more difficult project next, perhaps a minigun version?
/sarcasm, /hyperbole
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jackssmirkingrevenge
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Wed Nov 10, 2010 2:42 am

Gippeto wrote:We could if you weren't so camera shy... :wink:
It's for my own good ;)
How about a real time video? How fast is the ROF? How loud is each shot? How's the power?
This is to answer your first 3 questions ;)

[youtube][/youtube]

Power isn't spectacular, it will go through the bottom of a soup tin quite happily but not much else. To be honest though the flying brass means I'm not too bothered :D
Could you adapt a FN FAL mag or any other 7.62 X 54 mag and use that to feed it?


Not unless I change the way the bolt strips a new cartridge from the magazine, I fear it doesn't have enough power to do so.
You'll have to choose a more difficult project next, perhaps a minigun version?
Let's not get ahead of ourselves ;) putting this together neatly is more of a challenge for me than a minigun version!
Last edited by jackssmirkingrevenge on Sun Nov 19, 2017 7:28 am, edited 2 times in total.
hectmarr wrote:You have to make many weapons, because this field is long and short life
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Wed Nov 10, 2010 11:43 am

Works great!!
looks like crap


Maybe you could remake it with some durable materials?
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