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 76 users online :: 5 registered, 0 hidden and 71 guests


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

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

The Team
Administrators
Global Moderators
global_moderators.png CS

first attemp at pneumatic cannon>>>swooshhhhhh

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
Sponsored 
  • Author
    Message

Unread postAuthor: FORE!!!! » Wed Jul 22, 2009 1:29 am

MUZZEL VELOCITY=458 FPS once changed to inches does that sound plausable????
  • 0

User avatar
FORE!!!!
1st Lieutenant
1st Lieutenant
 
Posts: 277
Joined: Mon Jul 06, 2009 8:14 am
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Wed Jul 22, 2009 1:34 am

Given the clean nature of the hole in that particle board, sounds very plausible for a marble. Now go on, see how much that oversized chamber is actually giving you ;)
  • 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: Mr.Sandman » Fri Jul 24, 2009 10:58 pm

Not to be "that guy", but has anyone noticed how much he double posts. In just this thread there are at least 4, including a triple. Fore there is an edit button. But nice cannon though
  • 0

Yeah, it's that important.
User avatar
Mr.Sandman
Donating Member
Donating Member
 
Posts: 762
Joined: Fri Mar 28, 2008 9:10 am
Country: Antarctica (aq)
Reputation: 0

Unread postAuthor: inonickname » Fri Jul 24, 2009 11:06 pm

458 fps is not unlikely.

If you're using a compressor then just leave the chamber, though you could reduce it in size and use a track pump for moar.
  • 0

PimpAssasinG wrote:no im strong but you are a fat gay mother sucker that gets raped by black man for fun
User avatar
inonickname
Lieutenant General
Lieutenant General
 
Posts: 2606
Joined: Sun Dec 07, 2008 3:27 am
Reputation: 0

Unread postAuthor: frozebyte » Sat Jul 25, 2009 1:56 am

Got to agree with Mr Sandman. This cannon is also becoming more and more like a vintage car being equipped with lets say... Nissan Skyline GTR parts.

Considered building a new one instead of spamming all the upgrades onto this one? If you're really into spuds, you'll be disassembling your previous cannons once you are tired of it, and build even better ones :)

Cheers.
  • 0

User avatar
frozebyte
Sergeant First Class
Sergeant First Class
 
Posts: 136
Joined: Wed Jun 24, 2009 7:22 am
Reputation: 0

Unread postAuthor: FORE!!!! » Sat Jul 25, 2009 10:03 am

frozebyte wrote:Got to agree with Mr Sandman. This cannon is also becoming more and more like a vintage car being equipped with lets say... Nissan Skyline GTR parts.

Considered building a new one instead of spamming all the upgrades onto this one? If you're really into spuds, you'll be disassembling your previous cannons once you are tired of it, and build even better ones :)

Cheers.


lmao i really dont care for you or sandmans negativity,and i dont appologise for not organising my thread a lil better,its funny when the people that actually help you don't complane,and the people that dont help just winge/wine
and to add salt to wound i finally got my laser sight the other day,"looks sick" and it would boost a GTR any day..
and ive also made a 1'' ball valve into a breech loader with a 16 shoot marble magazine,ill post some pics tommorow its late...
  • 0

Last edited by FORE!!!! on Sat Jul 25, 2009 7:20 pm, edited 1 time in total.
User avatar
FORE!!!!
1st Lieutenant
1st Lieutenant
 
Posts: 277
Joined: Mon Jul 06, 2009 8:14 am
Reputation: 0

Unread postAuthor: frozebyte » Sat Jul 25, 2009 10:47 am

Fine with us if you dont take our advice :roll:
  • 0

User avatar
frozebyte
Sergeant First Class
Sergeant First Class
 
Posts: 136
Joined: Wed Jun 24, 2009 7:22 am
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: Mr.Sandman » Sat Jul 25, 2009 10:53 am

Ahh once again, the whole i dont give a crap about grammar and/or other peoples criticism. I was trying to help you from spending a lot of money on a basic cannon when you could be making a far more powerful cannon. By the way, Jealous? I dont think im jealous of an overkill basic air cannon. Your just lucky most mods dont catch the annoying triple posts that you make.
  • 0

Yeah, it's that important.
User avatar
Mr.Sandman
Donating Member
Donating Member
 
Posts: 762
Joined: Fri Mar 28, 2008 9:10 am
Country: Antarctica (aq)
Reputation: 0

Unread postAuthor: FORE!!!! » Sat Jul 25, 2009 10:59 am

frozebyte wrote:Fine with us if you dont take our advice :roll:


nevermind??
  • 0

Last edited by FORE!!!! on Sat Jul 25, 2009 7:12 pm, edited 1 time in total.
User avatar
FORE!!!!
1st Lieutenant
1st Lieutenant
 
Posts: 277
Joined: Mon Jul 06, 2009 8:14 am
Reputation: 0

Unread postAuthor: inonickname » Sat Jul 25, 2009 11:06 am

Pull your head in FORE, I've PMed you.
  • 0

PimpAssasinG wrote:no im strong but you are a fat gay mother sucker that gets raped by black man for fun
User avatar
inonickname
Lieutenant General
Lieutenant General
 
Posts: 2606
Joined: Sun Dec 07, 2008 3:27 am
Reputation: 0

Unread postAuthor: FORE!!!! » Sat Jul 25, 2009 11:10 am

Mr.Sandman wrote:Ahh once again, the whole i dont give a crap about grammar and/or other peoples criticism. I was trying to help you from spending a lot of money on a basic cannon when you could be making a far more powerful cannon. By the way, Jealous? I dont think im jealous of an overkill basic air cannon. Your just lucky most mods dont catch the annoying triple posts that you make.


forget about it....
  • 0

Last edited by FORE!!!! on Sat Jul 25, 2009 11:25 am, edited 1 time in total.
User avatar
FORE!!!!
1st Lieutenant
1st Lieutenant
 
Posts: 277
Joined: Mon Jul 06, 2009 8:14 am
Reputation: 0

Unread postAuthor: qwerty » Sat Jul 25, 2009 11:12 am

I think you could get alot more FPS than 458 just out alot more pressure in lets say 140PSI and you would increase the FPS significantly.

When shooting the target how far away were you because it looks pretty accurate.
  • 0

I visit occasionally to make unrelated posts.
User avatar
qwerty
Colonel
Colonel
 
Posts: 677
Joined: Sun Apr 12, 2009 2:16 am
Location: Evesham, Worcs
Country: United Kingdom (uk)
Reputation: 0

Unread postAuthor: FORE!!!! » Sat Jul 25, 2009 11:16 am

qwerty wrote:I think you could get alot more FPS than 458 just out alot more pressure in lets say 140PSI and you would increase the FPS significantly.

When shooting the target how far away were you because it looks pretty accurate.


i was standing about 10-15 meters away and the gun is really accurate ,plus with the scope and laser u cant miss, and i dont think the sprinkler valve can handle 140 psi :!:

here's a quick vid of a ball valve with a marble magazine i made = http://www.youtube.com/watch?v=RuBeEZ1odco

here is the gun= http://www.youtube.com/watch?v=ByQitPEi9eA
  • 0

User avatar
FORE!!!!
1st Lieutenant
1st Lieutenant
 
Posts: 277
Joined: Mon Jul 06, 2009 8:14 am
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Sun Jul 26, 2009 3:02 am

About chamber size, some practical examples of a launcher modelled close to yours.

Starting with a 10 inch chamber, you get a muzzle energy of 37.2 ft/lbs.

Increase chamber volume to 200%, muzzle energy is 38.7 ft/lbs - a mere 4% increase.

Increase chamber volume to 400% of the original, muzzle energy is now 39.6 ft/lbs - just 6% more muzzle energy, in practical terms you would never notice this increase without the benefit of a chronograph. In terms of filling the chamber though, you would certainly notice the difference, especially if filling by hand pump, and the shot would be much louder too.
  • 0

Attachments
40inch.jpg
20inch.jpg
10inch.jpg
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

Previous

Return to Pneumatic Cannon Database

Who is online

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

Reputation System ©'