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 43 users online :: 5 registered, 0 hidden and 38 guests


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

Registered users: Bing [Bot], Google [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

pvc elbow cracks

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
Sponsored 
  • Author
    Message

Unread postAuthor: spudbud101 » Sun Jul 15, 2007 3:42 am

From those pictures, it looks like the barrel is way too small (diameter wise) for the chamber. Of course, I may be seeing things.

From the design of the gun and with no support (I usually use a bit of 1" PVC as a support between the chamber and the barrel with a cable tie around it to keep everything from moving) it was definitely stress. Although the brand is also cheap from what I have heard.
  • 0

Rawr.
User avatar
spudbud101
Sergeant First Class
Sergeant First Class
 
Posts: 138
Joined: Wed Jun 28, 2006 11:35 pm
Location: Colorado
Reputation: 0

Unread postAuthor: pat123 » Tue Jul 17, 2007 1:06 pm

I found out what happened. i didn't put any wadding behind the marble and it fell back past the elbow. when i shot it the marble came straight up and hit the elbow.
  • 0

User avatar
pat123
Colonel
Colonel
 
Posts: 514
Joined: Sat Dec 23, 2006 10:08 pm
Location: S.C.
Reputation: 0

Unread postAuthor: noname » Tue Jul 17, 2007 6:15 pm

That might explain it. :wink: Put a small screw in the top of the elbow sometime, to make sure ammo doesn't fall down again.
  • 0

User avatar
noname
Lieutenant General
Lieutenant General
 
Posts: 2699
Joined: Mon Apr 10, 2006 9:19 pm
Location: Bay Area, CA
Country: United States (us)
Reputation: 9

Unread postAuthor: paaiyan » Tue Jul 17, 2007 6:37 pm

pat123 wrote:I found out what happened. i didn't put any wadding behind the marble and it fell back past the elbow. when i shot it the marble came straight up and hit the elbow.


That'll do it. You might try a ball detent with your next cannon. You can do that by glueing a small piece of felt on the inside of the barrel where you want the ball to stop, or it can be done with a bead of hot glue. Just make sure that whatever you put in there isnt too large or it will restrict the airflow.

Edit, one thing that would work very well is if you took a small, think nail an dcut it to just a hair longer than the ID of the barrel, then jam it in there good at the back. As long as you can't move it easily with your fingers, it'll work great.
  • 0

"Who ever said the pen was mightier than the sword, obviously, never encountered automatic weapons."
-General Douglass MacArthur

Read my dog's blog - Life of Kilo
User avatar
paaiyan
Major General
Major General
 
Posts: 2140
Joined: Wed Dec 27, 2006 10:03 pm
Location: Central Oklahoma
Country: United States (us)
Reputation: 1

Previous

Return to Pneumatic Cannon Discussion

Who is online

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

Reputation System ©'