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mini pneumatic ballistic knife

Built a miniature 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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Unread postAuthor: Hotwired » Sat Sep 03, 2011 8:57 pm

clemsonguy1125 wrote:http://en.wikipedia.org/wiki/Ballistic_knife#Legality_in_the_United_Kingdom


That's not relevant to jack.

Besides, every projectile launcher on this forum except some of the more anaemic micro launchers is illegal in the UK.
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Unread postAuthor: clemsonguy1125 » Sat Sep 03, 2011 9:04 pm

I know it is not to him, but just a warning that it may be illegal.
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That is all.
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Unread postAuthor: mattyzip77 » Sat Sep 03, 2011 9:47 pm

dude that is so friggen awesome!! You need to make your own utility belt like Batman, lol!!
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Unread postAuthor: LovableAirGuns » Sat Sep 03, 2011 10:49 pm

That looks pretty cool, but in america I know spring powered ballistic knives are illegal and can carry jail time. My guess would be pneumatic ones as well. Since I have no idea what country you are in.


your aloud to have a ballistic knife but it has to powered by gun powder.
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Unread postAuthor: Gippeto » Sat Sep 03, 2011 11:24 pm

mattyzip77 wrote: You need to make your own utility belt like Batman, lol!!


And then sign up for whatever passes as the local "geek squad" :lol:

Neat toy Jack...now mount it on the sentry gun. :twisted:
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Unread postAuthor: jackssmirkingrevenge » Sun Sep 04, 2011 1:19 am

A heavier knife and a longer handle would give a bigger impact...


This was proff-of-concept, a collaboration with jake might be on the cards :)

This puts you up there with Chuck Norris you know..
Just the two of you!


Chuck Norris could probably fire it faster twanging it from his beard :D

If you ever have money left over from lathe/mill stuff, you may want to get an entry-level table top belt sander.


For the moment funds have been set aside for the pimping up of the sherline units, but eventually I definitely want to add a sander, grinder, bandsaw etc. to my workshop.

But overall I'd say it turned out pretty well. I don't think it's very dangerous compared to running up and stabbing someone with it, but I guess that wasn't really the purpose of the build.


Precisely, if I wanted to take a sentry down I would use the US Army method and beat them to death with their own helmet :roll:

I'm guessing that means you were jabbed with it repeatedly by a deranged leather-clad Russian?


You're along the right lines, though her preferring instrument was a Swann Morton N<sup>o.</sup> 26... good times :D

Besides, every projectile launcher on this forum except some of the more anaemic micro launchers is illegal in the UK.


Indeed, hard to think of something that isn't illegal in the UK these days - but at least your tough legislation and enforcement has eliminated all crime ;)

your aloud to have a ballistic knife but it has to powered by gun powder.


Does that mean I can't have me a silentNRS-2 :D

sign up for whatever passes as the local "geek squad"


I can't help thinkingthis guy would make a bigger impression on crime with a couple of shooting knives...
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Unread postAuthor: inonickname » Sun Sep 04, 2011 1:47 am

Don't get a grinder and sander, just make or buy a belt grinder. A belt grinder can function as both a sander/grinder, and will often accept a sanding disk. A gutsy belt grinder can do some pretty insane metal removal, probably quicker than any grinder, especially by hand. They're great for knife grinding too, and can be setup for convex, flat, concave, chisel etc. grinds.

http://www.youtube.com/watch?v=i6ArDRtYg1o

Plus you can make up belts for most grits under the sun, and get halfway to a mirror finish without leaving it. If you have belts fine enough you could go right to a buffing mop after for a polish.
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Unread postAuthor: Zeus » Sun Sep 04, 2011 4:47 am

Well, I guess the ball mill can wait, that belt sander looks like a necessary addition to my shed.

I have a suspiciously strong right arm from using my handcrank bench grinder.

Image

That's what mine should look like.

Edit: I really can't spell, "nescesary", really?
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Last edited by Zeus on Sun Sep 04, 2011 6:16 am, edited 1 time in total.
/sarcasm, /hyperbole
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Unread postAuthor: Brian the brain » Sun Sep 04, 2011 5:04 am

Strong right arms come in handy....


But the ladies are turned off by that weak thin left arm dangling from your other shoulder for some reason...
Anyway...
While grinding and shaping my latest build with and anglegrinder using laminated sanding discs..I found that the result looks like it's polished to a high gloss..

It's quite easy shaping metal this way and it looks great!

I think I should run it over my homemade katana when I get some time off from my bobberbuild and my pump-pneumatic...
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Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
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Unread postAuthor: inonickname » Sun Sep 04, 2011 5:59 am

Brian the brain wrote:Strong right arms come in handy....


But the ladies are turned off by that weak thin left arm dangling from your other shoulder for some reason...
Anyway...
While grinding and shaping my latest build with and anglegrinder using laminated sanding discs..I found that the result looks like it's polished to a high gloss..

It's quite easy shaping metal this way and it looks great!

I think I should run it over my homemade katana when I get some time off from my bobberbuild and my pump-pneumatic...


I did some work on a bowie today, 12" blade from 7mm spring steel. Cut the shape, forged it flat (the metal had a curve in it :roll: ) and did all the rough grinding and sanding. Used a 9" angle grinder for the bulk of the grinding (wrestling 3 horses isn't fun for your wrists) and the final grinding with a 4", then down to sanding disks on the 4" then to the same disks on a drill. I didn't have any finer disks so I tried both hand sanding and stoning to finish it. Realized it was a pretty pointless cause after a while.

Sounds like it's time to order some finer disks :wink:
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Unread postAuthor: jackssmirkingrevenge » Sun Sep 04, 2011 6:11 am

That belt grinder looks fantastic! Hmmm...

Maybe I should edit the title to "the other knife thread" :D
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Unread postAuthor: Zeus » Sun Sep 04, 2011 6:14 am

Just to derail this thread further, does using an angle grinder (4 inch) affect the temper of spring steel excessively? I'd like to make a crossbow by some plans, but for the moment I can't justify ruining two hacksaw blades, not to mention my hacksawing technique is far from perfect.
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Unread postAuthor: inonickname » Sun Sep 04, 2011 7:08 am

Zeus wrote:Just to derail this thread further, does using an angle grinder (4 inch) affect the temper of spring steel excessively? I'd like to make a crossbow by some plans, but for the moment I can't justify ruining two hacksaw blades, not to mention my hacksawing technique is far from perfect.


When you cut it with discs at least it will mess the temper up in the corners of the spring where it's cut, which is probably the worst place to have metal weakness.

I'd temper and reharden anyway. You'll want it "soft" for any working you do with it, and when you forge it flat (well, into a recurve if you're going the full nine yards) it has to be hot. If you wanna try beat a leaf spring flat cold then tie a noose for yourself beforehand.

If you're any good with forging then forge it thinner at the ends too.
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Unread postAuthor: Labtecpower » Sun Sep 04, 2011 7:21 am

Just to derail this thread further, does using an angle grinder (4 inch) affect the temper of spring steel excessively? I'd like to make a crossbow by some plans, but for the moment I can't justify ruining two hacksaw blades, not to mention my hacksawing technique is far from perfect.


That completely depends on how much you are going to affect the temperature. I believe anything above 200 degrees celsius affects tempering.

JSR wrote:Do I sound like a guy who would shoot a full can of beer, even if was a shítty brand :wink:


Absolutely not :D
I have thrown away some beer one time, when me and my friends were having a party in a city. We got a full crate from some guys, but the beer bottles in the crate popped open after a while, and the stuff inside them didn't smell particulary pleasant :roll: Still wondering what it was :D

It's not the best Dutch beer but definitely the easiest to get hold of outside of Holland.


That's for sure :)
If you want a really bad hangover, you should get drunk with Heineken. I think it also has a very boring taste :P

Yeah, cap for the schrader, strip down and polish the blade... but you know me and aesthetics.


Dimply looks very nice :) And with a lathe it isn't very hard to make very aesthetically pleasing things, anything shiny will do the job.
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Unread postAuthor: jackssmirkingrevenge » Sun Sep 04, 2011 10:08 am

Labtecpower wrote:Dimply looks very nice :) And with a lathe it isn't very hard to make very aesthetically pleasing things, anything shiny will do the job.


Well, this was a proof of concept model, if jake comes up with something pretty as a blade then the rest of it will have to match ;)
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