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 40 users online :: 4 registered, 0 hidden and 36 guests


Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

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

The Team
Administrators
Global Moderators
global_moderators.png CS

Coaxial Pneumatic (Updated/Upgraded)

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 
  • Author
    Message

Coaxial Pneumatic (Updated/Upgraded)

Unread postAuthor: Juggernaut12121 » Tue Apr 08, 2014 5:37 pm

I attempted this a while ago but never finished it because I had no idea what to use as a piston (I first tried using some PVC fitting wrapped in tape but that didn't work at all). After a while I finally got a working piston and I have to say this thing is LOUD, my first shot was at 40 PSI, no projectile or suppressor and it was earsplitting (then again I did it inside). I went outside to test it at 60 PSI with a wax slug against sheet metal and was surprised by the pure power of the piston valve.

Anyway a few specs:
-2" piston
-1/2'' Ball valve pilot valve (I want to upgrade this later)
-.75 caliber barrel, I think it's about 18'' long
-.75 caliber suppressor (want to upgrade this too)
-Minimum operating pressure: about 20 PSI
-Maximum operating pressure: about 150 PSI

That's all I can think of

It's pretty noobish but I love this thing so far. Any recommendations welcomed :D


UPDATE:
-The pilot is now a 3/4'' sprinkler valve and the pilot for that is a blow gun
-Minimum operating pressure: about 10 PSI

It's louder than originally, but seems a bit better functioning, new pictures at way bottom
  • 0

Attachments
1.jpg
(The piston)
2.jpg
(Pilot valve)
3.jpg
(Main suppressor)
4.jpg
(Overview)
5.jpg
(Fill valve)
6.jpg
New trigger is much more ergonomic and easy to work
7.jpg
Top view of the gun, it looks a bit nicer and is easier to hold without the ball valve and suppressor sticking out near the back
8.jpg
New pilot valve is more clean looking and has a smaller volume
Last edited by Juggernaut12121 on Sun Apr 13, 2014 6:35 pm, edited 1 time in total.
Whatever the mind can conceive and believe, it can achieve
User avatar
Juggernaut12121
Sergeant First Class
Sergeant First Class
 
Posts: 134
Joined: Wed Apr 03, 2013 12:47 pm
Country: United States (us)
Reputation: 4

Re: Coaxial Pneumatic

Unread postAuthor: fenrir » Tue Apr 08, 2014 9:03 pm

Try keeping the volume between the piston and the pilot low, as this would allow the piston to respond more quickly when piloted. :)
  • 0


fenrir
Specialist
Specialist
 
Posts: 47
Joined: Tue Jul 30, 2013 10:31 am
Reputation: 0

Re: Coaxial Pneumatic

Unread postAuthor: Juggernaut12121 » Wed Apr 09, 2014 9:58 am

Thanks! I'll be sure to keep that in mind!
  • 0

Whatever the mind can conceive and believe, it can achieve
User avatar
Juggernaut12121
Sergeant First Class
Sergeant First Class
 
Posts: 134
Joined: Wed Apr 03, 2013 12:47 pm
Country: United States (us)
Reputation: 4

Re: Coaxial Pneumatic

Unread postAuthor: Boomer58cal » Fri Apr 11, 2014 1:56 pm

Simple, cheap and functional. I like it.

I'm in the parts gathering/prototyping stage on my first piston valve. I'm building mine inside a 2" sch "80" tee. I'm going to use a sprinkler valve for a pilot, mounted as close to the tee as possible and running a small hose to my trigger(blow gun). I'm not an expert but it's my understanding this pilot setup would be a substantial performance upgrade over your current ball valve mounted several inches from your piston and should improve accuracy. Just food for thought.

I'd shoot the heck out of something with it. Good job.
  • 0


Boomer58cal
Staff Sergeant
Staff Sergeant
 
Posts: 125
Joined: Tue Apr 01, 2014 12:53 pm
Country: United States (us)
Reputation: 7

Re: Coaxial Pneumatic

Unread postAuthor: Juggernaut12121 » Fri Apr 11, 2014 2:14 pm

Thanks! I used the ball valve and the weird 'c' shaped section since it was what I had laying around. Once I get money I'll upgrade to a sprinkler valve and probably mount the blow gun on the handle in the middle of it. That and the piston's pretty inefficient so I'll be redoing that next
  • 1

Whatever the mind can conceive and believe, it can achieve
User avatar
Juggernaut12121
Sergeant First Class
Sergeant First Class
 
Posts: 134
Joined: Wed Apr 03, 2013 12:47 pm
Country: United States (us)
Reputation: 4

Re: Coaxial Pneumatic (Updated/Upgraded)

Unread postAuthor: Boomer58cal » Mon Apr 14, 2014 7:10 pm

That's what I'm talking about! Good job. I bet that things pretty nice to shoot now.
You would think the piston would react faster. Was there any noticeable power gain?
  • 0


Boomer58cal
Staff Sergeant
Staff Sergeant
 
Posts: 125
Joined: Tue Apr 01, 2014 12:53 pm
Country: United States (us)
Reputation: 7

Re: Coaxial Pneumatic (Updated/Upgraded)

Unread postAuthor: Juggernaut12121 » Mon Apr 14, 2014 8:22 pm

I'm not sure yet. I threw it together last night and was only able to dry fire it once or twice, although the piston striking back is more audible and the recoil went from zero to hardly noticeable. It is a whole nother world to hold and aim though, the trigger is up front where is ought to be and the butt end is fatter than the 1/2" pipe producing a more stable shouldering
  • 0

Whatever the mind can conceive and believe, it can achieve
User avatar
Juggernaut12121
Sergeant First Class
Sergeant First Class
 
Posts: 134
Joined: Wed Apr 03, 2013 12:47 pm
Country: United States (us)
Reputation: 4

Re: Coaxial Pneumatic (Updated/Upgraded)

Sponsored

Sponsor
 


Return to Pneumatic Cannon Database

Who is online

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

cron
Reputation System ©'