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 44 users online :: 2 registered, 0 hidden and 42 guests


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

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

The Team
Administrators
Global Moderators
global_moderators.png CS

PAC WithOutLoss

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: jackssmirkingrevenge » Tue Jan 10, 2012 5:23 pm

sharpshooter11000 wrote:Hmm I suppose, what's the point in captive pistons then?


shhhhh...
  • 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: Brian the brain » Wed Jan 11, 2012 4:25 pm

It would be cool to have a part of the bolt open up a ballvalve slightly when it is in full forward position.

This is a very awkward but intruiging design.

There is no loss of performance, in fact it is probably as powerful as any bustdisc cannon.... but major loss of air after the projectile has left the barrel makes me think about why avoiding loss would be so important...

Seems this would work just as well and requires less accuracy on the ammo part:

( bolt should be 2 part with the head being able to extend through the hollow body of it.)
  • 0

Attachments
Coax repeater.jpg
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

Unread postAuthor: Petitlu » Wed Jan 11, 2012 5:19 pm

I ended up sealing the barrel, tomorrow I'm the first tests!
I will put photos of joints
  • 0

User avatar
Petitlu
Brigadier General
Brigadier General
 
Posts: 807
Joined: Fri Jun 03, 2011 4:52 am
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Thu Jan 12, 2012 12:39 am

Brian the brain wrote:There is no loss of performance, in fact it is probably as powerful as any bustdisc cannon.... but major loss of air after the projectile has left the barrel makes me think about why avoiding loss would be so important...


Hence... cartridges!

I ended up sealing the barrel, tomorrow I'm the first tests!


Looking forward to the result :D

I will put photos of joints


The Dutch members will love it ;)
  • 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: Brian the brain » Thu Jan 12, 2012 2:04 pm

LOL

Any progress yet?
  • 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

Unread postAuthor: Petitlu » Thu Jan 12, 2012 2:13 pm

yes
I ended up sealing the barrel and the breech
I set the barrel on the air supply
Tomorrow I'm doing a test!

Image

Image

Image

Image

Image

Image

Image

Image
  • 0

User avatar
Petitlu
Brigadier General
Brigadier General
 
Posts: 807
Joined: Fri Jun 03, 2011 4:52 am
Reputation: 0

Unread postAuthor: Brian the brain » Thu Jan 12, 2012 3:32 pm

Sweet custom work!

You've inspired me to come up with a variation.

[youtube]http://www.youtube.com/watch?v=8PsYiKIlmVQ&list=HL1326399043&feature=mh_lolz[/youtube]
  • 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

Sponsored

Sponsor
 


Unread postAuthor: Petitlu » Thu Jan 12, 2012 3:36 pm

Thank you !

I'm glad to have you inspired!

It must make now!

:D
  • 0

User avatar
Petitlu
Brigadier General
Brigadier General
 
Posts: 807
Joined: Fri Jun 03, 2011 4:52 am
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Fri Jan 13, 2012 12:56 am

Looking really good, glad someone is actually doing this - especially someone with a love for high pressure :) can't wait to see it in action.
  • 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: Petitlu » Fri Jan 13, 2012 1:26 am

Thank you!

I like challenges, and for a while I wanted to do it.

I have to finish my other PAC 2 barrels !
:D
  • 0

User avatar
Petitlu
Brigadier General
Brigadier General
 
Posts: 807
Joined: Fri Jun 03, 2011 4:52 am
Reputation: 0

Unread postAuthor: Technician1002 » Fri Jan 13, 2012 11:18 am

My QDV is a modified version of this. The valve core is retained instead of shot out allowing for the use of much less expensive projectiles. Instead of launching the o-ringed projectile out the barrel, it is launched into the breech allowing the air to then eject a much lower cost projectile out the barrel.

This greatly reduces the cost of operation and permits shooting projectiles such as full cans of soda, marshmallows, spuds, candy, and eggs.

The design permits rapid resetting of the valve core and reloading for more time spent launching stuff.
  • 0

User avatar
Technician1002
Chief of Staff
Chief of Staff
 
Posts: 5190
Joined: Sat Apr 04, 2009 11:10 am
Reputation: 14

Unread postAuthor: Petitlu » Fri Jan 13, 2012 1:03 pm

projectiles is cheap!
€ 4 to 20! and are easy to do because no O-ring
  • 0

User avatar
Petitlu
Brigadier General
Brigadier General
 
Posts: 807
Joined: Fri Jun 03, 2011 4:52 am
Reputation: 0

Unread postAuthor: POLAND_SPUD » Fri Jan 13, 2012 1:38 pm

@technician
I've sugested that your QDV design could be easily adapted for breech loading... just springload a piston an keep it in cocked position with a sear - as soon as the trigger is pressed it retacts
  • 0

Children are the future

unless we stop them now
User avatar
POLAND_SPUD
Chief of Staff
Chief of Staff
 
Posts: 5405
Joined: Sat Oct 13, 2007 4:43 pm
Country: Israel (il)
Reputation: 10

Unread postAuthor: jackssmirkingrevenge » Fri Jan 13, 2012 3:01 pm

Technician1002 wrote:Instead of launching the o-ringed projectile out the barrel, it is launched into the breech allowing the air to then eject a much lower cost projectile out the barrel.


It's true that the QDV allows anything that fits in the barrel to be fired, but in theory this should give "burst disk" performance, and from what we've seen from Petitlu so far, I don't think he's interested in firing potatoes :D

edit: not PUI yet but it's Friday night, so soon :D
  • 0

Last edited by jackssmirkingrevenge on Fri Jan 13, 2012 3:33 pm, edited 1 time in total.
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: POLAND_SPUD » Fri Jan 13, 2012 3:19 pm

ohh jsr you seem to be PUI :D
petitlu isn't interested in firing potatoes but I agree that a system that allows you to fire just anything htat fits in the barrel is better than what he posted so far
  • 0

Children are the future

unless we stop them now
User avatar
POLAND_SPUD
Chief of Staff
Chief of Staff
 
Posts: 5405
Joined: Sat Oct 13, 2007 4:43 pm
Country: Israel (il)
Reputation: 10

PreviousNext

Return to Pneumatic Cannon Database

Who is online

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

Reputation System ©'