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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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Unread postAuthor: warhead052 » Mon May 02, 2011 10:08 am

Ah ok. Even so, 10m is alot for just a prototype ballistic knife.
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Unread postAuthor: Crna Legija » Mon May 02, 2011 10:13 am

yea, ill have a new video once i harden(if possible) the new blade and glue it in.
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Unread postAuthor: warhead052 » Mon May 02, 2011 10:14 am

Ok, nice. Mine when complete will be about 7 inches long. Just the launcher.
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Unread postAuthor: jackssmirkingrevenge » Mon May 02, 2011 10:24 am

Crna Legija wrote:I fixed the leak by making a cup O-ring, and good lord was it a PITA to make.


Did you actually cut up a standard o-ring 0_o

went over to see the neighbours yard.


Tsk...careful

Still, Nice blade!
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Unread postAuthor: Crna Legija » Mon May 02, 2011 10:41 am

jackssmirkingrevenge wrote:
Crna Legija wrote:I fixed the leak by making a cup O-ring, and good lord was it a PITA to make.


Did you actually cut up a standard o-ring 0_o

went over to see the neighbours yard.


Tsk...careful

Still, Nice blade!


yep i super glued the oring onto the pipe then put it in the drill press and slowly cut at it with a sharp hack saw blade.

thanks.
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Unread postAuthor: warhead052 » Mon May 02, 2011 10:46 am

Hey crna, quick question. For your blade, what did you use to make it? (the new one of course.) Where did you get the metal and stuff? I may make a pvc blade just as a saftey, that way I dont accidently shoot me self and it kills me.
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Unread postAuthor: Crna Legija » Mon May 02, 2011 10:52 am

lol pvc will brake first shot.

I found the steel at home, my dad buys random bit from off cut and stuff its way cheaper and sometimes they just give it to you. Then i used a angle grinder to cut the rough shape and refined it on the bench grinder.
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Unread postAuthor: warhead052 » Mon May 02, 2011 10:55 am

Yeah, thats why I want to use it, so it wont be able to be used more than once. I will take a look around and see what I can dig up, and if I cant dig anything up, I will grap a piece of an old metal tent pole from my grandfather, smash it down, and then use his grinder to get rid of the paint and stuff.
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Unread postAuthor: Crna Legija » Fri May 06, 2011 7:25 am

i sharpen the blade today, and will try to case harden it asap. then i have to glue it back up.
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Attachments
leaver.jpg
thats the trigger.
sharpblade.jpg
the sharp blade, ill use finer sand paper tomorrow to clean it up a bit
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Unread postAuthor: warhead052 » Fri May 06, 2011 9:59 am

Nice, is that one spring loaded? Or air? Also, quick question about your first one, did you just plug off the very end of it, or the entire plug?
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Unread postAuthor: Labtecpower » Fri May 06, 2011 10:13 am

just READ before you post.

A lot of your questions are answered in this thread I think
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Unread postAuthor: jackssmirkingrevenge » Fri May 06, 2011 10:15 am

Labtecpower wrote:just READ before you post.


Your avatar is most appropriate.

Nice work -_-, I hope that latch can hold the pressure!
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Unread postAuthor: Labtecpower » Fri May 06, 2011 10:25 am

The latch itself seems plenty strong to me. The ring wich holds it would be the first to fail.

Your avatar is most appropriate.


:D
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Unread postAuthor: Crna Legija » Fri May 06, 2011 10:31 am

warhead052 wrote:Nice, is that one spring loaded? Or air? Also, quick question about your first one, did you just plug off the very end of it, or the entire plug?


this one is air as well, but it could be spring powered as well , if your talking about the female quick connect, yes i filled the hole thing.


jackssmirkingrevenge wrote:Nice work -_-, I hope that latch can hold the pressure!


thanks, the latch is 3mm thick alu but if it does break i can make one out of stainless steel
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Unread postAuthor: jhalek90 » Fri May 06, 2011 10:34 am

idea, 12g c02 cart, that is opened when you push a button, and the blade is separated from the chamber by a burst disk.

Push button, c02 enters chamber, pops burst disk, blade goes fooooosh! thunk!
would this design have any possible advantages?
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