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1/2 Copper QEV Gun

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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1/2 Copper QEV Gun

Unread postAuthor: qwerty » Sat Sep 05, 2009 12:55 pm

Here is my new QEV gun. Its pretty simple and powerful at 70 psi it will shoot a screw dart around 400m and has alot of kick i realy need a good track pump.
:twisted:
The specs are
15mm barrel
22mm chamber
1/2 QEV
blowgun pilot
and some other stuff
i havent got any damage pics yet because i cant find any good ammo!
but here it is any way.

Image

Image

Image

There.
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Unread postAuthor: THUNDERLORD » Sat Sep 05, 2009 1:19 pm

And I thought you were a "Noob". :P

Very nice, hope you keep up the good work!

BTW, there's probably a wire-nut that'll fit the copper pipe perfectly, then the dart's/arrows can be epoxied into those.

I am 100% sure someone will mention using higher pressure with it too.

8) Got to go for now, it's saturday and all... :( 8)

edit: still got a minute, but, if you look at the "90" on the chamber (near the pilot blow nozzle), my idea has been to use a "T" there instead, and with a spring plunger(on reducer bushing), it will press the pilot.
Then you'd need a "JSR" type blow-forward bolt for auto-loading though.
(he's to me the "John Browning" of the spudding world...) 8)
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Unread postAuthor: qwerty » Sat Sep 05, 2009 1:44 pm

Thanks for the reply yeah i realy do need to use higher pressures but my pump that im using at the moment is so rubbish.
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Unread postAuthor: Brian the brain » Sat Sep 05, 2009 3:02 pm

There are some good examples of homebuilt high pressure trackpumps ( or stirrup pumps) on this site..


Easy to build and cheaper than a store bought pump wich would never come close to the output..
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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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Re: 1/2 Copper QEV Gun

Unread postAuthor: Ragnarok » Sat Sep 05, 2009 3:53 pm

When did this tendency for people listing pipe bores, but no lengths start?

Anyway, there's not a huge amount I can say. It looks decent, but it would be dishonest of me to pretend it was anything hugely special, as I've seen its like dozens of times.
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Does that thing kinda look like a big cat to you?
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Unread postAuthor: qwerty » Sat Sep 05, 2009 3:57 pm

I do see your point rag because on uksgc most of the copper cannons are QEVs but anyway, it wasn't supposed to be anything special just something to mess around with.
Its a very simple cannon pretty cheap aswell :) and also my most powerful :)

About the lenghts (sp)? umm i think around 100cm for the barrel and about 75 for the chamber.
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Unread postAuthor: Ragnarok » Sat Sep 05, 2009 4:04 pm

qwerty wrote:...just something to mess around with

Few spudguns are anything else!

... and also my most powerful.

A very subjective measure of course, and only really important to the owner. But if such an superlative comparison is important to you, don't let me dissuade you from using it.
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Unread postAuthor: Brian the brain » Sat Sep 05, 2009 4:27 pm

Hey....
I'm pretty vague about the dimensions of my creactions... :roll:

Then again...I try to make them more than just something to mess around with... :wink:


While you are searching for the pump tutorial...try and find the one on making a wooden stock...
: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: far_cry » Sat Sep 05, 2009 5:53 pm

good for you kid
nice air canon .i was think you just good in the flip thing :D
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Unread postAuthor: twizi » Sat Sep 05, 2009 8:53 pm

looks good how the blow gun for a pilot
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Unread postAuthor: Ragnarok » Sat Sep 05, 2009 9:25 pm

Brian the brain wrote:Hey.... I'm pretty vague about the dimensions of my creations...

And have I ever said that I believe that a good thing? I may let you get away* with doing it, but that doesn't mean I like it.

*Like I have much of a choice in the matter...
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Unread postAuthor: Brian the brain » Sun Sep 06, 2009 1:16 am

And have I ever said that I believe that a good thing? I may let you get away* with doing it, but that doesn't mean I like it.

*Like I have much of a choice in the matter...


Shut up Rag...You sound like my wife!
:D


B.o.t.

So, you got any upgrades planned?
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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: qwerty » Sun Sep 06, 2009 2:37 am

Umm about the pilot its fine
and upgrades well.....i might add some sights and probably clean it up a little.
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Unread postAuthor: FORE!!!! » Sun Sep 06, 2009 2:48 am

Nice plinker qwerty,only thing square up the barrel and chamber with a better spacer/support, im sure you can wip something up :o
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Unread postAuthor: qwerty » Sun Sep 06, 2009 2:59 am

Yeah i cant fix that problem because when i put on the the 15mm compression fitting it pushed the pipe upwards and it dosent go back down.
I need to get rid of the tape and use some hose ties/bands.
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