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500psi+ piston valve launcher and 6mm steel coaxial

Built a pneumatic 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: hyldgaard » Mon Apr 21, 2008 8:35 am

biggsauce wrote:C'est tres bon! Any chance of a chronograph reading?

no, unfortunately not.. i dont have a chronograph and i dont know anyone that has..
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Unread postAuthor: biggsauce » Mon Apr 21, 2008 8:40 am

Too bad! Well, official velocity or not, the damage speaks for itself. Most impressive man

EDIT: Forgot to ask, what is holding your chamber and barrel together? They look nice...
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Unread postAuthor: hyldgaard » Mon Apr 21, 2008 8:50 am

biggsauce wrote:Too bad! Well, official velocity or not, the damage speaks for itself. Most impressive man

EDIT: Forgot to ask, what is holding your chamber and barrel together? They look nice...

To be honest, i dont know what the material is called, but basicly its some kind of plastic i cut to shape and drilled. Same material i used to hold the blowgun on the coaxial.
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Unread postAuthor: biggsauce » Mon Apr 21, 2008 9:08 am

Ah ok I was wondering if they were something you had bought or made. We have a big sheet of 1" thick teflon-like material that I was planning on using to cut out some saddles like you have there.
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Unread postAuthor: hyldgaard » Mon Apr 21, 2008 9:11 am

That definately sounds useable :)
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Unread postAuthor: Gippeto » Mon Apr 21, 2008 9:30 am

Very impressive damage there hyldgaard. :D

Well done!
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Unread postAuthor: al-xg » Mon Apr 21, 2008 1:25 pm

Be careful of ricochets with the hard ammo.
I shot this aluminium pellet and it hit a roof top 30m behind me.
And If you've seen that video of the guy being hit by a .50cal ricochet, well it made that same whiizzz noise.
Cool but scary.
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Unread postAuthor: hyldgaard » Mon Apr 21, 2008 1:37 pm

al-xg wrote:Be careful of ricochets with the hard ammo.
I shot this aluminium pellet and it hit a roof top 30m behind me.
And If you've seen that video of the guy being hit by a .50cal ricochet, well it made that same whiizzz noise.
Cool but scary.

Believe me, im very much aware of ricochets. as of when i got the fridge compressor and upped the power of my launchers severely, ive been firing at targets in front of a soft backstop. I have been hit with ricochets from a 5,5mm airgun and that can really hurt - wouldnt want an 11mm ball bearing permanently mounted in my head :tard:
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Unread postAuthor: SpudFarm » Mon Apr 21, 2008 1:39 pm

haha i got a shotgun pellet in my forhead :D
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Unread postAuthor: hyldgaard » Mon Apr 21, 2008 1:44 pm

spudfarm wrote:haha i got a shotgun pellet in my forhead :D

Even though that doesnt exactly sounds pleasant, it does in my oppinion sound better than a 11mm ball bearing or a 20g lead slug :D
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Unread postAuthor: Ceppu » Mon Apr 21, 2008 3:25 pm

This topic made it.. I definitely need to get my hands on a fridge compressor!

Would be interesting to see what distances could be reached with an arrow/crossbow bolt as ammo and 500 psi pressure. :shock: Well, probably you wouldn't ever see your projectile again.. But still..

Now just give them some nice shine and polish. :)
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Unread postAuthor: al-xg » Mon Apr 21, 2008 4:51 pm

I was using 14mm aluminium diabolo pellets though :)
They work great, appart from the ricochet problem, they fly fast and straight, i'll try casting some out of lead or some other soft metal someday.

I haven't tried arrows or flechettes at high pressure yet, i would hate it if one of the fins was to come off though...


Btw i didn't mention it, but nice cannons ;)
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Unread postAuthor: al-xg » Mon Apr 21, 2008 5:03 pm

I was using 14mm aluminium diabolo pellets though :)
They work great, appart from the ricochet problem, they fly fast and straight, i'll try casting some out of lead or some other soft metal someday.

I haven't tried arrows or flechettes at high pressure yet, i would hate it if one of the fins was to come off though...


Btw i didn't mention it, but nice cannons ;)
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Unread postAuthor: Zeus » Sun Dec 13, 2009 2:13 am

TwitchTheAussie wrote:God bless the backyard of rural australia. I like it dude. Its hot. Nice work.

Hear Hear.
Also hyldgaard, you have the same blowgun as me and I am in
Australia.
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