Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 72 users online :: 4 registered, 0 hidden and 68 guests


Most users ever online was 155 on Mon Aug 15, 2016 1:40 am

Registered users: Bing [Bot], Google Adsense [Bot], MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

Metal Advanced Ball Valve Cannon

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
Sponsored 

What do you think??

Awsome
0
No votes
Good
2
17%
Ok
4
33%
Bad
1
8%
Trash
5
42%
 
Total votes : 12
  • Author
    Message

Metal Advanced Ball Valve Cannon

Unread postAuthor: jazzman56 » Wed Aug 17, 2011 2:54 am

Gday all

This is my 3rd air gun, 1 combustion and 2 pneumatic. The combustion launcher failed and took many a click to get the gas to ignited. My second was a simple PVC ball valved air gun. Here is my 3rd (second working) air gun.

The Negotiator

This is my first working cannon that i've made that i'm satisfied as i have very limited tools. (The Negotiator). I wanted to keep it simple and cheap, with still considerable power. It has a simple stock, spring loaded valve (to keep it reliable) and a breech loading barrel. All joints are teflon tapped and are air tight. Through the barrel support together with spare parts and keeps the barrel secure enough



Specs:
Barrel: 60 cm by 1cm copper tubing
Chamber: 20mm by 200mm (2cm times 20cm) galvanized steel
Valve:Oiled Spring loaded 3/4 (20mm) ball valve (yes i know it's a ball valve)
Ammo: triple A batteries + anything that fits
PSI: 160 psi
Trigger: Fire extinguisher pin (attached to length of para cord)
Fill Valve: Schrader pushed through a brass end cap epoxied in.
Sights: No sights. Any ideas???

It took 30 min to drill the F*&%^ing hole for the schrader valve large enough. What bit is the best for brass??

PICS
Image
Image
Image
Image
Image
Image
Image


To come:

1.
Looking forward to making a piston/hammer valve capable multiple shots (using a 1 liter powder fire extinguisher via a pressure rated hose from the 10mm nozzle) to fire 4.5mm bb's.

Questions:

Where do i get a 4.5 IB barrel???

Any ideas on how to construct a hammer for a blow gun???

Where to get sealing face/gaskets????

Should it be hot glue or washer piston?? (which has better performance)


2.
Gippedo's Homemade pump


Any comments and criticism welcome.

3.

Fridge Compressor (Hopefully)

How do i get the froen out of the hose??? sidecuters
  • 0

Last edited by jazzman56 on Wed Aug 17, 2011 4:20 am, edited 1 time in total.

jazzman56
Specialist
Specialist
 
Posts: 53
Joined: Wed May 11, 2011 4:52 am
Reputation: 0

Unread postAuthor: wyz2285 » Wed Aug 17, 2011 3:11 am

1. I´m making a tutorial for how to make a hammer valve from a blowgun, search a little.
3. Just cut a small hole on the tube, let the froen leak until there is nothing left, then cut it all
  • 0

User avatar
wyz2285
Major General
Major General
 
Posts: 2244
Joined: Sat Mar 06, 2010 7:50 am
Location: Porto, Portugal
Country: Portugal (pt)
Reputation: 12

Unread postAuthor: nathanhd123 » Wed Aug 17, 2011 5:16 am

First off nice gun. However the zip ties make it look a bit messy along with the block of wood.. Have you tried carving a stock? Also how safe is that fire extinquisher pin as you dont wont that misfiring.

For the sealing face you just need to find some thick rubber,neoprene sheets are good, and cut it size. Then use a small screw and a washer to keep it in place and screw it into your piston.

How about some damage pics?
  • 0

<a href="http://www.danasoft.com"><img src="http://www.danasoft.com/vipersig.jpg" border="0"></a><p><div>Sign by Danasoft - <a href="http://www.danasoft.com">Get Your Sign</a></p></div>
User avatar
nathanhd123
Sergeant
Sergeant
 
Posts: 95
Joined: Sat Jan 15, 2011 12:36 pm
Location: United Kingdom
Reputation: 0

Unread postAuthor: Doctore » Wed Aug 17, 2011 5:34 am

Nice airgun!!!
You should use threaded shrader valve so you can safely go up to 300 psi
  • 0

User avatar
Doctore
Staff Sergeant
Staff Sergeant
 
Posts: 115
Joined: Sat Mar 26, 2011 2:18 pm
Location: Danilovgrad
Country: Montenegro (me)
Reputation: 1

Re: Metal Advanced Ball Valve Cannon

Unread postAuthor: Crna Legija » Wed Aug 17, 2011 7:35 am

jazzman56 wrote:Where do i get a 4.5 IB barrel???


Go to hobby stores they have lots of small id brass tubing, take a bb with you and test fit.

jazzman56 wrote:Any ideas on how to construct a hammer for a blow gun???


Do you mean the striker? you can look up zip gun on YouTube and use that trigger mech they use, just replace the cartage with valve stem.

jazzman56 wrote:Where to get sealing face/gaskets????


Bike/car/truck tire inner tubers or bunnings.

jazzman56 wrote:Should it be hot glue or washer piston?? (which has better performance)


If they have the same fit you wont notice any difference, i reckon hot glue pistons good place to start, when you bump up the pressure then make a washer one.

jazzman56 wrote:Gippedo's Homemade pump


I would buy a check valve that can handle the desired pressure not make one because if it fails your pump rod will shoot back like a air ram and can deal some serious damage. It happen here to Brian the brain the handle broke his jaw.

jazzman56 wrote:Fridge Compressor? sidecuters???


you will probably need really good pair of side cutters or bolt cutters because the lines are steel., cut them then leave the area the gas isn't toxic but heaver than air and will displace it so if your around it you could suffocate
  • 0

'' To alcohol... The cause of, and solution to, all of life's problems.”
--Homer Simpson

Add me on ps3: wannafuk, 8/11/11 cant wait
User avatar
Crna Legija
Major General
Major General
 
Posts: 2333
Joined: Sun Jul 20, 2008 5:14 am
Location: australia
Reputation: 0

Unread postAuthor: Goats spudz » Wed Aug 17, 2011 7:44 am

use a Qev and blowgun mine is really reliable and very powerful at 70psi a nail will go through 2" of wood
  • 0


Goats spudz
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 458
Joined: Tue Aug 02, 2011 12:31 pm
Reputation: 0

Unread postAuthor: pneumaticcannons » Wed Aug 17, 2011 10:38 am

hey cool gun not much ive got to say other than get a threaded shrader valve(no epoxy) and bump up the pressure. Ive got a cheap $20 emergency car compressor that goes up to 300 psi. You should get a similar one instead of waisting time finding a fridge compressor.
Damage shots? :P
  • 0

User avatar
pneumaticcannons
Major
Major
 
Posts: 392
Joined: Sat Oct 30, 2010 9:45 am
Location: shite country in asia
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: jazzman56 » Wed Aug 17, 2011 3:55 pm

nathanhd123

I do have a safety net, i close the ball valve and set the pin in place. I then pressurize/load, then when i'm ready to fire i connect the spring the the ziptie.

Sorry to sound like an idiot but i've looked but still cannot find a brass or steel schrader valve anywhere, online or at a hardware store.
  • 0


jazzman56
Specialist
Specialist
 
Posts: 53
Joined: Wed May 11, 2011 4:52 am
Reputation: 0

Unread postAuthor: Mr.Tallahassee » Wed Aug 17, 2011 5:00 pm

A brass schrader should be with air fittings and compressor attachments. I bought one at my local hardware store.
  • 0

User avatar
Mr.Tallahassee
Major
Major
 
Posts: 364
Joined: Sun Jul 10, 2011 2:35 am
Reputation: 0

Unread postAuthor: mattyzip77 » Wed Aug 17, 2011 6:39 pm

I also have a hard time finding good schraders. To get the one I wanted, I had to order from McMaster. Only ones I can find are dog poopie, the ones that are all rubber and sold at Wally World. Automotive stores in my area did not even have any good ones!! :(
  • 0

Go Bruins!!!!
User avatar
mattyzip77
Donating Member
Donating Member
 
Posts: 1249
Joined: Tue Jun 28, 2011 12:22 pm
Location: Taxachusetts
Reputation: 0

Unread postAuthor: Mr.Tallahassee » Wed Aug 17, 2011 8:51 pm

Automotive stores never have them because they aren't automotive parts. They're pneumatic parts(kinda obvious. I know :lol: ) and I found them at Ace Hardware down my street. Brass will hold up to a great deal of pressure. I've heard of them being tested over 2000PSI so they should easily hold up to 500PSI or so. This may be 1/8'' npt but it will do just fine. http://www.airridefittings.com/store/index.php?main_page=product_info&cPath=48_9&products_id=24
  • 0

User avatar
Mr.Tallahassee
Major
Major
 
Posts: 364
Joined: Sun Jul 10, 2011 2:35 am
Reputation: 0

Unread postAuthor: ookook » Sun Oct 02, 2011 11:46 pm

A brass schrader should be with air fittings and compressor attachment
  • 0


ookook
Private
Private
 
Posts: 19
Joined: Fri Sep 30, 2011 10:46 pm
Reputation: 0

Return to Pneumatic Cannon Database

Who is online

Registered users: Bing [Bot], Google Adsense [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'