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hybrid ballistic knife

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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hybrid ballistic knife

Unread postAuthor: jackssmirkingrevenge » Sun Jul 22, 2012 10:28 am

Not really a finished project, just a bit of testing fun. I took the blade from this project and combined it with a hybrid chamber and did some testing at 10x:



Very impressive but the short barrel makes it deafeningly loud, probably won't be firing it again.
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Last edited by jrrdw on Sun Nov 17, 2013 9:37 am, edited 1 time in total.
Reason: Fixed video.
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Unread postAuthor: Alster370 » Sun Jul 22, 2012 10:42 am

Lovely! I especially like the delrin glowing red when it fires :D
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Unread postAuthor: MrCrowley » Sun Jul 22, 2012 1:53 pm

Frickin' cool! More R&E please :D
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Unread postAuthor: jackssmirkingrevenge » Sun Jul 22, 2012 2:17 pm

MrCrowley wrote:More R&E please :D


Not in this configuration, my ears have suffered enough ;)
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Unread postAuthor: kydavies » Sun Jul 22, 2012 2:36 pm

That makes me so happy. How about shooting a grappling hook over a few buildings? cant picture that ending well :) but I love it
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Unread postAuthor: Fnord » Sun Jul 22, 2012 3:26 pm

Yeah, that one actually looks a bit more intimidating, maybe even 'practical', assuming you could suppress the noise somehow.

I imagine a busy downtown street, and amidst the hustle and bustle there is a faint *thwmp*.
A man falls over dead, while a bystander in a heavy winter jacket appears to gain 30 pounds briefly and emits a faint puff of conspicuous cotton-scented smoke.
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Unread postAuthor: tjrobison11 » Sun Jul 22, 2012 10:12 pm

how far can it shoot ?
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Unread postAuthor: D_Hall » Sun Jul 22, 2012 10:31 pm

Dunno about the laws where you are, but in this neck of the woods possession of that little beauty is a felony. You might want to look into that and if it doesn't look good, take down the video...

(She is a beauty though!)
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Unread postAuthor: jackssmirkingrevenge » Sun Jul 22, 2012 10:51 pm

kydavies wrote:That makes me so happy. How about shooting a grappling hook over a few buildings? cant picture that ending well :) but I love it


If you want something that fits on a utility belt but still has that sort of performance, hybrid is definitely the way to go ;)

I imagine a busy downtown street, and amidst the hustle and bustle there is a faint *thwmp*.
A man falls over dead, while a bystander in a heavy winter jacket appears to gain 30 pounds briefly and emits a faint puff of conspicuous cotton-scented smoke.


LOLOL!

Making it quiet would be relatively easy, by containing the gasses:

Image

The blade is heavy and therefore not going very fast, so stopping the piston would not be too much of a chore.

As to it being "practical" though, probably not - if you're close enough to use this, you can probably use a normal knife more effectively.

I digress, this is not a prototype for the KGB ;)

how far can it shoot ?


Miles! :D

Dunno about the laws where you are, but in this neck of the woods possession of that little beauty is a felony. You might want to look into that and if it doesn't look good, take down the video...


Alas practically everything on my channel would fall foul of local laws, but I try to keep a low profile.
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Unread postAuthor: jackssmirkingrevenge » Sat Oct 20, 2012 6:52 am



Modified the design slightly to use a pusher piston, now that the gases are contained it's much quieter so I did some testing at 10x. Punched a nice hole through 1/32" mild steel. Note the delay between the knife moving and the glow from the burning gasses filling the "barrel".
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Last edited by jrrdw on Thu Oct 24, 2013 2:43 pm, edited 1 time in total.
Reason: Fixed video.
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Unread postAuthor: wyz2285 » Sat Oct 20, 2012 7:14 am

Nice, it's nice for sure. And surprisingly quiet. Cool stuff, what mix were you using?
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Unread postAuthor: jackssmirkingrevenge » Sat Oct 20, 2012 7:33 am

wyz2285 wrote:And surprisingly quiet.


Yup, even at 16x - no gas comes out, so its only impact noise.

Cool stuff, what mix were you using?


I've tried it up to 16x but the shots in the video are all at 10x
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Unread postAuthor: mattyzip77 » Sat Oct 20, 2012 10:04 am

That is seriously fuking awsummmmmmmmmm!!!!!
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Unread postAuthor: jakethebeast » Sat Oct 20, 2012 10:18 am

Hehehe nice, you need to make bigger one when i get the blade made ;)

Still 80mm or can i make it longer?
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Unread postAuthor: POLAND_SPUD » Sat Oct 20, 2012 10:18 am

so a fully self contained cartridge relying on this principle is a viable option, right ?
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