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 42 users online :: 5 registered, 0 hidden and 37 guests


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

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

The Team
Administrators
Global Moderators
global_moderators.png CS

2.5" TB barrel

Post about things you have launched or thought about launching. Also post about various materials used for building cannons. No posts about explosive projectiles!
Sponsored 
  • Author
    Message

Unread postAuthor: MaxuS » Tue Oct 16, 2007 1:58 am

But you live in america, its costs me £40 ($80) if i want to make a 2" ported piston. Here, its cheaper to get the sprinkler valve and you know that it will be reliable.
  • 0

User avatar
MaxuS
Sergeant Major
Sergeant Major
 
Posts: 198
Joined: Sun Sep 02, 2007 5:11 pm
Reputation: 0

Unread postAuthor: williamfeldmann » Tue Oct 16, 2007 10:29 am

@ipaintball
Your last 2 inch tee piston cost $10. It probably ported 1 and a half inches.

To fire tennis balls you want something that can port 2 inches at least, which means 3 or 4 inch tees more than likely which will run 10+ bucks by themselves. Then you need the fittings and whatnot. But I agree it is still cheaper in America to build a piston than buy a 2 inch sprinkler.

I tried the conduit yesterday, and the tennis ball fits tight but it can be rammed into place just like the pressure rated stuff. I have found a new, cheaper source of awesomeness (that may be a bit extreme but it is nice nonetheless).
  • 0

Trying to figure out how to make a SCUBA first stage regulator work for portable charging station. If only that pesky job thing didn't keep eating up all my time...

"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former." - Albert Einstein
User avatar
williamfeldmann
2nd Lieutenant
2nd Lieutenant
 
Posts: 216
Joined: Sun Sep 09, 2007 6:55 pm
Location: Ames. Iowa, middle of BFE
Reputation: 0

Unread postAuthor: PVC Arsenal 17 » Thu Oct 18, 2007 10:08 pm

Anyway... I finished my gun and I'm going to shoot it soon (glue is drying)

It seems like tennis balls are EXTREMELY tight inside 2.5" sch40. So tight, in fact, it's damn near impossible to get them in there. I can't see how a spud gun could push them out with any decent results when there would be so much friction.

I guess I'll just have to wait and see.
  • 0


PVC Arsenal 17
Major General
Major General
 
Posts: 1762
Joined: Mon Mar 27, 2006 4:18 pm
Location: United States
Reputation: 1

Unread postAuthor: BC Pneumatics » Thu Oct 18, 2007 10:36 pm

It actually works quite well :)
  • 0

<a href="http://www.bcarms.com/"><img src="http://www.bcarms.com/images/store_logo.png" border="0"> </a>
User avatar
BC Pneumatics
Donating Member
Donating Member
 
Posts: 1089
Joined: Tue Jan 18, 2005 6:55 pm
Location: Fresno, CA
Reputation: 0

Unread postAuthor: williamfeldmann » Fri Oct 19, 2007 12:01 pm

My uncle does a lot of general contracting and has a 1 foot section of 2.5 inch PVC. It is the same size and dimensions as 2.5 inch sch 40 electrical conduit. The fittings are still as hard to come by. And conduit is not pressure rated so don't use it for anything other than the barrel. But they are the same size of pipe.
  • 0

Trying to figure out how to make a SCUBA first stage regulator work for portable charging station. If only that pesky job thing didn't keep eating up all my time...

"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former." - Albert Einstein
User avatar
williamfeldmann
2nd Lieutenant
2nd Lieutenant
 
Posts: 216
Joined: Sun Sep 09, 2007 6:55 pm
Location: Ames. Iowa, middle of BFE
Reputation: 0

Unread postAuthor: MaxuS » Fri Oct 19, 2007 12:15 pm

PVC Arsenal 17 wrote:I can't see how a spud gun could push them out with any decent results when there would be so much friction.


It actually works better this way, the tighter the fit (within reason) the more the Tennis Ball will resist the pressure building up behind it, eventually, the longer the TB is lodged in the barrel means the more pressure being released behind it, more pressure = more power.
You will get the best results only if the inside of the barrel is smooth, if you were to sleeve one pipe inside the other, you would need to fill that gap up otherwise you will lose air through it.
  • 0

User avatar
MaxuS
Sergeant Major
Sergeant Major
 
Posts: 198
Joined: Sun Sep 02, 2007 5:11 pm
Reputation: 0

Unread postAuthor: PVC Arsenal 17 » Fri Oct 19, 2007 2:26 pm

I guess you were right. I shot my gun today...

Unfortunately, words do not do justice to the state of awe I was in!
  • 0


PVC Arsenal 17
Major General
Major General
 
Posts: 1762
Joined: Mon Mar 27, 2006 4:18 pm
Location: United States
Reputation: 1

Sponsored

Sponsor
 


Unread postAuthor: Carlman » Fri Jan 11, 2008 9:57 am

dont ya love that feeling? lol
  • 0

Image
Aussie spudders unite!!
User avatar
Carlman
Major General
Major General
 
Posts: 1618
Joined: Sat Nov 24, 2007 1:18 am
Location: Western Australia
Reputation: 0

Unread postAuthor: ALIHISGREAT » Fri Jan 11, 2008 12:15 pm

if the tbs are too tight could you take off the 'fluff' ? it would also increase range because there would be less drag.
  • 0

User avatar
ALIHISGREAT
Major General
Major General
 
Posts: 1779
Joined: Sat Aug 25, 2007 6:47 pm
Location: UK
Reputation: 0

Unread postAuthor: Carlman » Fri Jan 11, 2008 12:17 pm

taking the fluff off would expose the rubber thus causing friction, maybe if you lubed it up it might increase velocity
  • 0

Image
Aussie spudders unite!!
User avatar
Carlman
Major General
Major General
 
Posts: 1618
Joined: Sat Nov 24, 2007 1:18 am
Location: Western Australia
Reputation: 0

Previous

Return to Construction Materials/Ammo Discussion

Who is online

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

Reputation System ©'