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 68 users online :: 3 registered, 0 hidden and 65 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

chamber reduction

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

chamber reduction

Unread postAuthor: supa_midget » Mon Jul 30, 2007 5:02 am

My latest cannon (lol my first) is very loud, the chamber volume is probably to large. GGDT indicates that removing a ft of chamber will only drop the velocity by 30fps and I was wondering if that would quieten down the gun a little. IS sacrificing 30fps worth it?
  • 0


supa_midget
Private
Private
 
Posts: 13
Joined: Sat Jan 27, 2007 7:04 am
Reputation: 0

Unread postAuthor: Gepard » Mon Jul 30, 2007 5:26 am

You could always add a silencer........

Michael
  • 0


Gepard
Captain
Captain
 
Posts: 342
Joined: Mon Jun 18, 2007 11:12 am
Reputation: 0

Unread postAuthor: Marco321 » Mon Jul 30, 2007 5:33 am

I would say its worth it. What is the C:B? Anything above 3:1 i have heard is a waste of air, it doesn't increase performance by much, compared to noise and energy going into pumping it up.

If the chamber is huge, which is sounds like it is, you will need a very large, very good silencer.
  • 0

User avatar
Marco321
Colonel
Colonel
 
Posts: 540
Joined: Tue May 15, 2007 2:56 am
Location: Sydney, Australia
Reputation: 0

Unread postAuthor: VH_man » Mon Jul 30, 2007 5:58 am

increase your barrel length. my barret 14mm is silent now that i have a 6 foot marble barrel on it............... also shoots fast enough to bury darts all the way into treeeeess............. so i only see them if i look down the hole they made................
  • 0

User avatar
VH_man
Major General
Major General
 
Posts: 1827
Joined: Sat Dec 09, 2006 6:00 pm
Location: New Hampshire
Reputation: 1

Unread postAuthor: jackssmirkingrevenge » Mon Jul 30, 2007 8:46 am

I would go with the above, a longer barrel would make more use of the available air and give you a quieter shot and the benefit of increasing power. On the other hand, a smaller chamber would make your launcher more compact and easier to pump up.
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Unread postAuthor: supa_midget » Fri Aug 10, 2007 7:20 am

yeah the barrel is already bout 5' 4'' ill probably just slice a chunk off the chamber.
  • 0


supa_midget
Private
Private
 
Posts: 13
Joined: Sat Jan 27, 2007 7:04 am
Reputation: 0

Unread postAuthor: spud yeti » Fri Aug 10, 2007 8:37 am

No ways, make the barrel longer and save the other one for a different project :D
  • 0

really good quote/phrase here
User avatar
spud yeti
Brigadier General
Brigadier General
 
Posts: 1030
Joined: Tue May 08, 2007 1:41 pm
Location: Cape town south africa
Reputation: 0

Sponsored

Sponsor
 


Return to Pneumatic Cannon Discussion

Who is online

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

Reputation System ©'