pipe straightening

Cannons powered by pneumatic pressure (compressed gas) using a valve or other release.
User avatar
ALIHISGREAT
Staff Sergeant 3
Staff Sergeant 3
Posts: 1778
Joined: Sat Aug 25, 2007 6:47 pm
Location: UK

well its not for the chamber so it shouldn't be a problem if the pressure rating is altered, and it looks like i will have to buy a heat gun aswell :evil: stoopid pipe company sending me bent pipe grrrrrrrrrrrrrr
User avatar
f.c
Specialist 3
Specialist 3
Posts: 340
Joined: Sun Jul 08, 2007 2:40 am

is it combustion or pneumatic. if its a combustion simply use a heat gun and melt it back to straight but if it is a pneumatic just buy a new goddam barrel.
User avatar
frankrede
Sergeant Major 2
Sergeant Major 2
Posts: 3220
Joined: Thu Jul 20, 2006 9:47 pm
Has thanked: 1 time
Been thanked: 1 time

Seriously, how expensive could it be to get a new barrel?
Its costs me 2$ for 10 ft of 1/2"
it shouldn't cost you more than 5$ american for it.
Current project: Afghanistan deployment
User avatar
Marco321
Corporal
Corporal
Posts: 540
Joined: Tue May 15, 2007 2:56 am
Location: Sydney, Australia

Hey
I had the same problem once, i used a hair drier, it worked like a charm. But once again, i wouldn't trust it in a chamber, but a barrel will be just fine.

Another alternative which is one thing i did to maintain its straightness when firing (i used 15mm pvc), was i put 40mm pipe over it, and made 2 or 3 pvc washers that supported the barrel at the end, the front and the middle.
Failure to plan is planning to fail.

The 7 P's - Proper Prior Preparation Prevents Piss Poor Performance
User avatar
ALIHISGREAT
Staff Sergeant 3
Staff Sergeant 3
Posts: 1778
Joined: Sat Aug 25, 2007 6:47 pm
Location: UK

Marco321 wrote:Hey
I had the same problem once, i used a hair drier, it worked like a charm. But once again, i wouldn't trust it in a chamber, but a barrel will be just fine.

Another alternative which is one thing i did to maintain its straightness when firing (i used 15mm pvc), was i put 40mm pipe over it, and made 2 or 3 pvc washers that supported the barrel at the end, the front and the middle.
how did you straighten the pipe once you heated it up?
Seriously, how expensive could it be to get a new barrel?
Its costs me 2$ for 10 ft of 1/2"
it shouldn't cost you more than 5$ american for it.
well i live in the UK and i have to order my pipe off the internet and in 3m lenghts so a new barrel would cost me £10 (postage and pipe) which is £10 i can avoid paying.
User avatar
Marco321
Corporal
Corporal
Posts: 540
Joined: Tue May 15, 2007 2:56 am
Location: Sydney, Australia

ALIHISGREAT wrote:
Marco321 wrote:Hey
I had the same problem once, i used a hair drier, it worked like a charm. But once again, i wouldn't trust it in a chamber, but a barrel will be just fine.

Another alternative which is one thing i did to maintain its straightness when firing (i used 15mm pvc), was i put 40mm pipe over it, and made 2 or 3 pvc washers that supported the barrel at the end, the front and the middle.
how did you straighten the pipe once you heated it up?
The heat temporarily weakens the bonds between the vinyl chloride monomers, allowing the plastic to be shaped, then once it is hardened, the bonds reform, obtaining the new shape in the pipe. So just heat it a bit, then while its still heated, bend it into the right shape then keep that shape till it has cooled down back to room temp, just use water or something. You only need around 60*C to make it soft.
Failure to plan is planning to fail.

The 7 P's - Proper Prior Preparation Prevents Piss Poor Performance
User avatar
ALIHISGREAT
Staff Sergeant 3
Staff Sergeant 3
Posts: 1778
Joined: Sat Aug 25, 2007 6:47 pm
Location: UK

kl thanks for them help, i wonder if rolling it on my wooden hall floor would damage the floor? ahh well i'll find something else to roll on.

p.s. i was testing my cannon today without the breech loading at low pressure and it was beasty :twisted: i found the best projectile, the pritt stick!
User avatar
Marco321
Corporal
Corporal
Posts: 540
Joined: Tue May 15, 2007 2:56 am
Location: Sydney, Australia

ALIHISGREAT wrote:kl thanks for them help, i wonder if rolling it on my wooden hall floor would damage the floor? ahh well i'll find something else to roll on.

p.s. i was testing my cannon today without the breech loading at low pressure and it was beasty :twisted: i found the best projectile, the pritt stick!
It wont damage wood, but i wouldn't do it on wooden floors because they aren't always even. If you have a large sheet of plywood or smooth concrete floor or a smooth table, that would work well.
Failure to plan is planning to fail.

The 7 P's - Proper Prior Preparation Prevents Piss Poor Performance
Post Reply

Create an account or sign in to join the discussion

You need to be a member in order to post a reply

Create an account

Not a member? register to join our community
Members can start their own topics & subscribe to topics
It’s free and only takes a minute

Register

Sign in

  • Similar Topics
    Replies
    Views
    Last post