250 PSI copper riffle

Cannons powered by pneumatic pressure (compressed gas) using a valve or other release.
Post Reply
User avatar
super spuder
Corporal
Corporal
Posts: 558
Joined: Fri Apr 06, 2007 9:05 pm
Location: Ontario Canada

well i was talking to my friend the other day about spud guns... and he said that he would pay me to build him one... so after some talking he decided he wanted me to build a small coper rifle about 1 meter in length to shoot marbles... what i am wondering is would a blow gun be good enough to let the air out fast enough... or am i going to have to build another piston valve ? or do you have any other good ideas for valves?
edit : he wants to run it at about 250 psi
Last edited by super spuder on Mon Jul 16, 2007 11:27 am, edited 1 time in total.
trying to decide on a new project, probably something small.
Top
User avatar
iPaintball
Corporal 2
Corporal 2
Posts: 695
Joined: Sun Mar 04, 2007 8:37 pm

What's a blow valve?
Summer Projects:
CO2 tank hybrid: Gotta fix the meter :(
Cane gun: Needs a pilot/fill setup
1.5" piston valve gun: Almost done
Top
User avatar
noname
First Sergeant 4
First Sergeant 4
Posts: 2698
Joined: Mon Apr 10, 2006 9:19 pm
Location: Bay Area, CA

That's exactly what I thought as soon as I read this.
Top
User avatar
Velocity
Sergeant
Sergeant
Posts: 1039
Joined: Tue Feb 07, 2006 5:42 pm

Make a piston valve... a blowgun wouldn't exhaust fast enough (I assume blow valve means blowgun?)
Top
User avatar
noname
First Sergeant 4
First Sergeant 4
Posts: 2698
Joined: Mon Apr 10, 2006 9:19 pm
Location: Bay Area, CA

If that's what he's talking about, then no, a blowgun won't be able to shoot a marble. I also wouldn't advise you to build a piston valve, since the last thing you attempted was a pneumatic made of DWV cell core ABS, "sealed" with duct tape. I would also advise your friend not to buy anything from you unless he wants to die early.
Top
User avatar
super spuder
Corporal
Corporal
Posts: 558
Joined: Fri Apr 06, 2007 9:05 pm
Location: Ontario Canada

it is made from copper... AKA wont explode... and by the way i have a new valve in my gun now with O rings on it
edit- i have made other guns since that one to... i just dont bother posting them on here
trying to decide on a new project, probably something small.
Top
User avatar
noname
First Sergeant 4
First Sergeant 4
Posts: 2698
Joined: Mon Apr 10, 2006 9:19 pm
Location: Bay Area, CA

super spuder wrote:it is made from copper... AKA wont explode...
It will if he runs it at 250 psi, because seeing from the other stuff you've made you probably can't solder or sweat fittings well enough to hold that kind of pressure.
Top
User avatar
lukemc
Corporal
Corporal
Posts: 565
Joined: Sun Feb 25, 2007 8:48 am
Location: NY

buy THIS
"Those who are different change the world. Those who are the same keep it that way"
Top
User avatar
frankrede
Sergeant Major 2
Sergeant Major 2
Posts: 3220
Joined: Thu Jul 20, 2006 9:47 pm
Has thanked: 1 time
Been thanked: 1 time

super spuder wrote:it is made from copper... AKA wont explode... and by the way i have a new valve in my gun now with O rings on it
edit- i have made other guns since that one to... i just dont bother posting them on here
Well thats a relief, now the world know that ticking time bomb will still blow up, but at least the timer looks nice.
Current project: Afghanistan deployment
Top
User avatar
super spuder
Corporal
Corporal
Posts: 558
Joined: Fri Apr 06, 2007 9:05 pm
Location: Ontario Canada

frankrede wrote:
super spuder wrote:it is made from copper... AKA wont explode... and by the way i have a new valve in my gun now with O rings on it
edit- i have made other guns since that one to... i just dont bother posting them on here
Well thats a relief, now the world know that ticking time bomb will still blow up, but at least the timer looks nice.
what ????? that makes no sence at all
trying to decide on a new project, probably something small.
Top
User avatar
mopherman
Corporal 3
Corporal 3
Posts: 788
Joined: Sat Feb 03, 2007 8:20 pm
Been thanked: 1 time

well you could use a 1/4 qev to pilot. or you might be able to get away with a blowgun if your piston has orings and is a near perfect seal
searching for a modern day savior from another place,inclined toward charity,everyone's begging for an answer,without regard to validity,the searching never ends,it goes on and on for eternity
-Bad religion
Top
User avatar
noname
First Sergeant 4
First Sergeant 4
Posts: 2698
Joined: Mon Apr 10, 2006 9:19 pm
Location: Bay Area, CA

It makes no sense to you because you don't understand it.
Great metaphor!
Top
User avatar
MrCrowley
Moderator
Moderator
Posts: 10078
Joined: Fri Jun 23, 2006 10:42 pm
Location: Auckland, New Zealand
Been thanked: 3 times

I say it would be safe at 100psi if you know how to solder but at 250psi leaving that kind of pressure with your friend is a bit dodgy, if it blows both of you are screwed.
Top
User avatar
Brian the brain
Moderator
Moderator
Netherlands
Posts: 3497
Joined: Mon Dec 05, 2005 2:06 am
Location: Holland
Been thanked: 7 times

I wouldn't trust anybody with my metal guns...
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!!
Top
User avatar
Hotwired
First Sergeant 3
First Sergeant 3
Posts: 2599
Joined: Fri Oct 13, 2006 5:51 am
Location: UK

A blowgun would be good enough to pilot a marble cannon but is really too small for direct flow control.

Grab a QEV and copy one of the copper QEV designs round here.
Top
Post Reply

Create an account or sign in to join the discussion

You need to be a member in order to post a reply

Create an account

Not a member? register to join our community
Members can start their own topics & subscribe to topics
It’s free and only takes a minute

Register

Sign in

  • Similar Topics
    Replies
    Views
    Last post

Return to “Pneumatic Cannons”