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 70 users online :: 3 registered, 0 hidden and 67 guests


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

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

The Team
Administrators
Global Moderators
global_moderators.png CS

Pneumatic launcher

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: pricetag » Sat Apr 19, 2008 4:56 pm

I basically want to make a rocket, which one should i make?
  • 0


pricetag
Private
Private
 
Posts: 5
Joined: Mon Apr 07, 2008 9:29 pm
Reputation: 0

Unread postAuthor: clide » Sat Apr 19, 2008 10:11 pm

bigbob12345 wrote:Please explain this [wiseass physics knowledge] because I dont see how it could possibley make it explode :? Water is heavy if you use enough but wouldnt shooting heavy things be the same.
And Ive done it dozens of times, with no explosion what so ever.


It won't make it explode directly (unless you've used crappy material for the barrel). But if your gun isn't built to handle the recoil or if you aren't prepared for it then it is very easy to snap fittings and/or hurt whoever is firing.
  • 0

<a href="http://gbcannon.com" target="_blank"><img src="http://gbcannon.com/pics/misc/pixel.png" border="0"></a>latest update - debut of the cardapult

clide
Donating Member
Donating Member
 
Posts: 785
Joined: Sun Mar 06, 2005 3:06 am
Location: Oklahoma, USA
Reputation: 0

Unread postAuthor: DYI » Sun Apr 20, 2008 9:10 am

A properly built gun won't explode even if you fill the barrel with lead and fire. On the other hand, if your gun was made of PVC, excessive recoil could damage the fittings, but any heavy projectiles will do that.

I had a similar problem with my SCTBDC that involved the DWV ABS reducers on the barrel cracking open when I shot 10 pound darts at 400 psi. Wrapping it in a large amount of fiberglass seemed to solve the problem.
  • 0

Spudfiles' resident expert on all things that sail through the air at improbable speeds, trailing an incandescent wake of ionized air, dissociated polymers and metal oxides.
User avatar
DYI
Lieutenant General
Lieutenant General
 
Posts: 2861
Joined: Sat Jul 07, 2007 8:18 pm
Location: The People's Republic of Canuckistan
Country: Turks and Caicos Islands (tc)
Reputation: 9

Unread postAuthor: bigbob12345 » Sun Apr 20, 2008 9:13 am

TurboSuper wrote:Did you fill the whole barrel?
What was the cannon made out of?


Barrel filled all the way
It was made out of sch40 pvc
  • 0

User avatar
bigbob12345
Major General
Major General
 
Posts: 1516
Joined: Sat Dec 01, 2007 9:13 am
Location: Mercer Island,Washington
Reputation: 0

Unread postAuthor: Brian the brain » Sun Apr 20, 2008 9:24 am

Get malleable iron fittings and ballvalve and try again.
The water puts too much stress on PVC.
  • 0

Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
User avatar
Brian the brain
Moderator
Moderator
 
Posts: 3494
Joined: Mon Dec 05, 2005 2:06 am
Location: Holland
Country: Netherlands (nl)
Reputation: 29

Previous

Return to Pneumatic Cannon Discussion

Who is online

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

Reputation System ©'