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PAC WithOutLoss

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: Gun Freak » Tue Jan 24, 2012 4:16 pm

I get the pressure of the room and I inject it in the ass of the projectile as it no problem to move forward

:D :D :D :D
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Unread postAuthor: Petitlu » Tue Jan 24, 2012 4:21 pm

it is not right to laugh! :D
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Unread postAuthor: jackssmirkingrevenge » Wed Jan 25, 2012 1:01 am

Je reçois la pression de la chambre et je l'injecter dans le cul du projectile comme elle aucun problème pour aller de l'avant


... but it is funny!

:D

Good progress, keep it up!
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Unread postAuthor: Petitlu » Wed Jan 25, 2012 1:14 am

:D

Thank you

Accuracy, the blowgun is a pressure of 5000psi, this is not a blower compressor
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Unread postAuthor: Petitlu » Wed Jan 25, 2012 1:30 pm

I modified the PAC and I made a shot at 870psi!
Very powerful, two targets are almost through.
I put a muzzle brake for aesthetics and efficiency, it is drilled 12mm pile.
I do affects more than a wooden stock can be.

Image

Image

Image

Image

Image

Vidéo :

[youtube]http://www.youtube.com/watch?v=f3_nvuZ2MzY[/youtube]
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Unread postAuthor: wyz2285 » Wed Jan 25, 2012 2:24 pm

wow really nice :shock:
So now it´s pneumatically triggered right? The blowgun injects air in the back of the projectile to break the balance and "BOOM" am I correct?
In that case why do you need that bleed valve? safety?
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: Petitlu » Wed Jan 25, 2012 2:54 pm

Yes! you are right in the two answers!
avoids the bleeder of a false start if something goes wrong side cylinder head sealing
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Unread postAuthor: Brian the brain » Wed Jan 25, 2012 3:27 pm

Did you hydrotest the gun ?

What pressure is safe?

I can't help hiding behind my desktop when I see you putting 60 bar in a copper pipe!

I would be so scared!

Apart from my worries...I am SO impressed.
You got recoil from a smallbore pneumatic!
And a shotgun sound!


Oh...and beautiful bleedvalve!! Much better!
Great job!
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Last edited by Brian the brain on Wed Jan 25, 2012 3:35 pm, edited 1 time in total.
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: Petitlu » Wed Jan 25, 2012 3:32 pm

BTR thank you!
The copper tubes are stronger than people think!
I did some tests to 3000psi without problems, and the welds have also resisted ...
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Unread postAuthor: Brian the brain » Wed Jan 25, 2012 3:39 pm

Brian the Rain huh?

:D

I'm happy to hear about the safety margin!

In that case: I am in awe...pure awesomeness!

This must be the most powerful smallbore on SF!
It equals or even outdoes commercial ones.

This is the best news I could possibly get after starting my bulkfilled CO2 today...
For wich I used steel ofcourse... :D
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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: jackssmirkingrevenge » Wed Jan 25, 2012 3:47 pm

Brian the brain wrote:What pressure is safe?


Since when was this a concern for a true HPA spudder :D

Great work Petitlu, just beware of ricochets when firing at such close range!
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Unread postAuthor: Petitlu » Wed Jan 25, 2012 3:55 pm

@Brian : :wink:

BTB thank you!
change of the system and QOL QEV and I am proud to be the first to put this concept into practice, in addition the results are impressive ...
Your creations are beautiful!
I know how to make sticks as beautiful as yours!


No ricochets! target is made of wood / steel / wood / steel! then another target of wood !
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Unread postAuthor: jrrdw » Wed Jan 25, 2012 4:49 pm

If I was going to worry about a fail due to high pressure, I'd be worried about the hose in between the tank and cannon fitting. What is that coiled hose made of?
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Unread postAuthor: Petitlu » Wed Jan 25, 2012 5:07 pm

This flexible was also tested high pressure!
it is coated with a steel braid

It is a flexible plumbing
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Unread postAuthor: al-xg » Wed Jan 25, 2012 5:12 pm

Nitrile and a couple of layers of braided stainless steel, the (europeen) ones used for domestic plumbing.
The actual burst pressure ranges from 65bar for 32mm to 160bar for the 10mm stuff.
They have a huge safety factor for their use.
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