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High pressure steel piston valved rifle in progress.

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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High pressure steel piston valved rifle in progress.

Unread postAuthor: jhalek90 » Fri Nov 20, 2009 8:08 pm

Here it is. my new baby.

This is a high pressure gun that i am building/using to test my new fridge compressor. Does any one know what kind of pressure brass 1'' nipple will hold?? (my weakest fitting)

Is it a 1'' steel piston valve, wiht 3/4'' porting (Does this qualify as a QEV??)
The chamber is small... but more than sufficient, as the gun shoots .25 cal steel bullets.
THIS GUN STILL NEEDS A NAME! help me name it?

Still to do:
(1) Name the cannon
(2) Finish the stock :-)
(3) Build breech/ barrel system.
(4) Bind out how high my fridge compressor will go :-)
(5)Shoot some stuff
(6)Take damage pics/video

Here is a few photos, as well an early test fire video:

Cannon with a small barrel
Image
This mighty high strength seal-less piston! very very very light.
The only bumper is a spring. it works amazingly
Image

Video of 150psi test shot.... my ears are still ringing.
[youtube]http://www.youtube.com/watch?v=Az-q56mG6Rk[/youtube]


Hope you like it... ill keep you all updated :-)
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Re: High pressure steel piston valved rifle in progress.

Unread postAuthor: Ragnarok » Fri Nov 20, 2009 9:06 pm

jhalek90 wrote:Does this qualify as a QEV??

QEV refers to commercial valves only. (At least on this forum. They tend to use it more loosely on the French forum.)

HIS GUN STILL NEEDS A NAME! help me name it?

Sandra.
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Does that thing kinda look like a big cat to you?
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Unread postAuthor: toogers » Fri Nov 20, 2009 9:26 pm

Pretty nice. A good name? The s.c.h.- small copper handgun.
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Unread postAuthor: Major Collins » Fri Nov 20, 2009 9:30 pm

nice gun where does all the air go lol i see no air chamber :0
and why wont my piston valve work :( i rather just buy one off someone lol
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Unread postAuthor: jhalek90 » Fri Nov 20, 2009 10:35 pm

The chamber in under the Tee. it is very small... due to the fact that i am using a .25'' diameter barrel, and need to keep a good C to B ratio

What is wrong woth ur piston valve? i can probably help

toogers wrote:Pretty nice. A good name? The s.c.h.- small copper handgun.

This gun does not have a single copper piece on it. lol
Not to mention the final barrel is going to be close to 4ft... so its not a hang gun either. ahha nice try though.

more lik.... S.S.R lol... jk
(smal steel rifle).... not what i want to name it..

Oh, and by the way.... it will already throw a bouncy ball (1") faster than my other gun, which was clocked at just under 1200fps.... woot.
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Unread postAuthor: Major Collins » Fri Nov 20, 2009 10:43 pm

wow that is a very small chamber and you say you can fit 150 psi :o my god thats fabulous .c to b ? huh lol well my sealing gasket doesn't seal up against the barrel surface part ...

look for my post in the link below : D

http://www.spudfiles.com/forums/self-cl ... rt,30.html
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Unread postAuthor: c11man » Fri Nov 20, 2009 11:22 pm

jhalek90 wrote:Oh, and by the way.... it will already throw a bouncy ball (1") faster than my other gun, which was clocked at just under 1200fps.... woot.


lol sorry to break it to you but your not shooting over the speed of sound (1125fps) so either you did the math wrong with your home made crony or something else went wrong.
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Unread postAuthor: inonickname » Fri Nov 20, 2009 11:25 pm

jhalek90 wrote:Oh, and by the way.... it will already throw a bouncy ball (1") faster than my other gun, which was clocked at just under 1200fps.... woot.


Please don't claim these absurd figures here with no GGDT file, no (accurate) chronograph figure and even no audacity file. This doesn't have the makings to propel a bouncy ball above the speed of sound.

I'd also like to inquire how you fit a 1" bouncy ball inside a 1/4" bore gun.
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Unread postAuthor: POLAND_SPUD » Sat Nov 21, 2009 12:06 am

it looks quite good...

just under 1200fps
hmmm... ok let's forget that you've mentioned that :wink:

@Major Collins
if you can't get it to work right you can buy a QEV
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Unread postAuthor: Major Collins » Sat Nov 21, 2009 12:10 am

can you show me a qev valve ? pretty please :D im pretty sure i know what they look like but then again everywhere on the net they have different shapes and sizes :/
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Unread postAuthor: POLAND_SPUD » Sat Nov 21, 2009 12:19 am

what about this one then?? sorry the pic is a bit small.. I am a bit pressed with time ATM

they are often referred to as 'european' qevs but they are available in the US as well
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Unread postAuthor: Major Collins » Sat Nov 21, 2009 12:54 am

oh ive seen plenty of them on the net but none at the stores or soo and btw i live in Australia so its hard to get anything cos customs , stores ,gaming ratings XD suck lolol hrmm where in Australia can i get hold of one?
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Unread postAuthor: inonickname » Sat Nov 21, 2009 3:02 am

Check out bellpro. I got mine from there. Buy a slightly larger one than you need as the porting tends to be on the small side.
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Unread postAuthor: Major Collins » Sat Nov 21, 2009 3:24 am

i had a quick look at bellpro is it American? looks like it hrmm and $38 a bit pricey for what i need .. but it does look pretty.
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Unread postAuthor: inonickname » Sat Nov 21, 2009 4:10 am

Was this the site you went to?

Pneumatic stuff tends to be a little pricey, watching ebay for a while is a good idea.
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