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Copper Dueling Pistol

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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Copper Dueling Pistol

Unread postAuthor: Lockednloaded » Thu Apr 08, 2010 2:40 pm

This was my first experience with soldering, so to be safe a little extra JB weld was added around the only soldered joint. That join is NOT held only together with JB weld
THIS GUN HAS BEEN UPDATED NEW GRIP AND PILOT ADDED
1/2" BV for pilot valve
3/8" QD for filling and exhaust

Now for some pictures:

The whole gun :edit: BEFORE
Image

The Whole gun AFTER:
Image

Pilot/Fill Area :edit: BEFORE
Image

Pilot/Fill Area AFTER:
Image

Schrader Adaptor for Filling
Image

Exploded View with Piston
Image

Hope Y'all like it, i will get damage pictures once i get a shock pump, and find better ammo
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Last edited by Lockednloaded on Sun Apr 11, 2010 4:14 pm, edited 2 times in total.
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Unread postAuthor: deathbyDWV » Thu Apr 08, 2010 2:45 pm

Yeah it looks really nice... I thought type M copper was
for low pressure... :? I just heard that somewhere though... I very well might be wrong.

You should make some kind of pistol grip for it...
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Unread postAuthor: Lockednloaded » Thu Apr 08, 2010 3:50 pm

I might buy an old rubber band gun and use its grip or stock because i don't have any tools to make one myself.
Type M is the weaker variety, but it can still handle at least 250 psi
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Unread postAuthor: chinnerz » Fri Apr 09, 2010 2:32 am

just had an idea.
http://www.spudfiles.com/forums/hammers-t20248.html
that was something i found and will try and use in various applications.
do you think that the arm on the ball valve can be attached to the moving rod on the pump?
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Unread postAuthor: Lockednloaded » Fri Apr 09, 2010 10:24 am

I'm A little confused on what you plan to use it for, but this is a BV i found by the compressors, one side is male, the other is female. It turns 180˚ both ways, there are two lips you could grind off to make it turn 360˚, but good luck with that.
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Unread postAuthor: SpudBlaster15 » Fri Apr 09, 2010 11:28 am

Looks pretty good for a first copper cannon.

Given the relatively small pilot volume, you could probably pilot the valve with a ported blowgun, which would give the firing mechanism a more trigger like feel.
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Unread postAuthor: Gippeto » Fri Apr 09, 2010 1:37 pm

SpudBlaster15 wrote:Looks pretty good for a first copper cannon.

Given the relatively small pilot volume, you could probably pilot the valve with a ported blowgun, which would give the firing mechanism a more trigger like feel.



Agreed. :)

FYI for DWV... 3/4" Type M copper has a RATED working pressure of ~400psi.

Some reading material for you;

http://www.google.ca/url?sa=t&source=we ... wB3yLmPGBQ
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Unread postAuthor: Lockednloaded » Fri Apr 09, 2010 1:54 pm

I'm currently working on reducing th pilot volume, any tips?
I'm trying to make it pilot out of a blowgun which i already have hooked up, but its not piloting near enough.
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Unread postAuthor: Gippeto » Fri Apr 09, 2010 1:59 pm

Keep piston travel to no more than D/2.

Make sure the piston fits "good". It should not fall out if held upside down.

Take the blowgun apart and bore out the passages aroung the valve stem. I think there might be a tutorial for modding blowguns here somewhere as well.
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Unread postAuthor: metalmeltr » Fri Apr 09, 2010 3:07 pm

Look for blowguns on the wiki it has modification instructions.
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Unread postAuthor: clemsonguy1125 » Fri Apr 09, 2010 6:27 pm

Great gun, heres the mentioned tutorial on modding a blowgun
http://www.spudfiles.com/forums/how-to- ... 19189.html
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Unread postAuthor: chinnerz » Fri Apr 09, 2010 8:24 pm

Lockednloaded wrote:I'm A little confused on what you plan to use it for, but this is a BV i found by the compressors, one side is male, the other is female. It turns 180˚ both ways, there are two lips you could grind off to make it turn 360˚, but good luck with that.


i think i will have to draw this as it is hard to explain through words.

Edit.
and here it is
Image

when pulling the trigger, an arm pushes the release for the pump. this causes a rod to shoot out (i currently have three spring on it so it moves quick) the rod hits the BV, thus opening it quickly resulting in higher power?
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Unread postAuthor: Lockednloaded » Sun Apr 11, 2010 4:08 pm

BUMP for new pictures and ergonomic layout!

As you can see i will no longer be switching to a blowgun, because my new set up pilots extremely fast, and is very comfortable.
@chinnerz:
The 1/4" BV i was using before would be perfect for your application, its super easy to open.
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Unread postAuthor: mikemurph » Tue Apr 13, 2010 4:29 pm

wow thats cool! you should polish it up more, and add some wood grips to really make it look medieval. What ammo are you using for it, can't wait to see some damage :twisted: i think you should also switch your 90 degree elbow to a 45 for a better look.
Can you hold that thing with one hand and pull the BV? it looks a little heavy
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Unread postAuthor: Tetsuo315 » Tue Apr 13, 2010 6:08 pm

This is very slick. If you decide to make a grip for it, leave a channel so the pilot would vent at the bottom of the handle. See Pic

Image
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Last edited by Tetsuo315 on Tue Apr 13, 2010 8:34 pm, edited 1 time in total.
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