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prototype ballistic knife

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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prototype ballistic knife

Unread postAuthor: Crna Legija » Wed Apr 27, 2011 6:46 am

Jsr was talking about using a quick connect to make a ballistic knife in another thread(cant find it), so i gave it a go. Its quite powerful at only 75 psi it made it thought a ester egg and 1 peace of card board, not bad since it has no barrel. The blade is made from a broken hack saw blade pretty sharp.

edit vid

[youtube]http://www.youtube.com/watch?v=rb6b0rrCW98[/youtube]
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knife1.jpg
the hole thing. good entry for teh ghetto comp.
knife.jpg
the blade. it only sharpened on one side with a bench grinder
knife.jpg (33.13 KiB) Viewed 2730 times
knife dmg.jpg
damage pic.
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Unread postAuthor: LovableAirGuns » Wed Apr 27, 2011 7:07 am

haha that is awsome :D
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Unread postAuthor: Lockednloaded » Wed Apr 27, 2011 8:25 am

So all you really need is a blade and a QD without an internal check valve? Neat :)
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Unread postAuthor: Crna Legija » Wed Apr 27, 2011 8:38 am

yeah thats all there to it. just gotta leave the rubber washer in there. its only good for about 200psi because its super hard to open any higher.
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Unread postAuthor: mark.f » Wed Apr 27, 2011 8:51 am

I like the look of the knive/QD combo.

Another interesting thing, you now have a bayonet for anything you can make and simply attach a female QD to the end. :wink:
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Unread postAuthor: PVC Arsenal 17 » Wed Apr 27, 2011 10:43 am

What a simple and brilliant idea. Leave it to JSR. I'll be making a few of these now..
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Unread postAuthor: Crna Legija » Wed Apr 27, 2011 11:16 am

mark.f wrote:I like the look of the knive/QD combo.

Another interesting thing, you now have a bayonet for anything you can make and simply attach a female QD to the end. :wink:


lol so installing it on my semi.

PVC Arsenal 17 wrote:What a simple and brilliant idea. Leave it to JSR. I'll be making a few of these now..


Good, will like to see what you come up with. If you want it for long range(2m+) you will need a front heavy blade. This one will fly about 5-6m, most of it sideways :D
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Re: prototype ballistic knife

Unread postAuthor: jackssmirkingrevenge » Wed Apr 27, 2011 11:23 am

Very nice! Shame about the lack of "barrel" - adding a hollow "handle" as per the original design would not only give more acceleration but also act as a drag stabilisation device to make it fly straight.

Crna Legija wrote:Jsr was talking about using a quick connect to make a ballistic knife in another thread(cant find it)


Here

Image

PVC Arsenal 17 wrote:What a simple and brilliant idea. Leave it to JSR.


Not really my idea though, I just took this idea and replaced the spring with compressed air:

Image

Looking forward to what you might come up with, might give it a go myself when I get home... in about a month, grrrr....
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Unread postAuthor: Crna Legija » Wed Apr 27, 2011 12:20 pm

i could mod what i have, like
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the rubber washer in side the QD would hopefuly seal the pipe connect.
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Unread postAuthor: dewey-1 » Wed Apr 27, 2011 2:12 pm

Now here is a knife projectile! 12.7 mm bore, about 175 mm long with about 37 mm diameter with blades open.
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Unread postAuthor: Crna Legija » Wed Apr 27, 2011 2:44 pm

kotabuuki posted a vid about arrow like them in the Archery thread i didn't know how power full bow were in till i saw the jsrs post :shock:
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Unread postAuthor: Lockednloaded » Wed Apr 27, 2011 10:36 pm

I've got one put together with some PB quick-connects, any ideas on how to make the knife more stable while still remaining a knife?
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Unread postAuthor: Crna Legija » Wed Apr 27, 2011 11:03 pm

add a hollow pipe to the back it should bring the cg forward.
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Unread postAuthor: jackssmirkingrevenge » Wed Apr 27, 2011 11:55 pm

Interesting thought Duane... a "magic wand" style arrow-launcher, hmm...
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Unread postAuthor: Lockednloaded » Thu Apr 28, 2011 11:56 am

I don't see how I could do that with out it getting in the way of the handle. I might try the design with the rod through the male QD, but I'm afraid it wouldnt add much stability... It most important that it resembles a reall knife
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