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 38 users online :: 6 registered, 0 hidden and 32 guests


Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], Majestic-12 [Bot], MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

The Hole Maker

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

The Hole Maker

Unread postAuthor: apocavorme » Thu Oct 06, 2011 6:14 pm

100 psig
1 meter barrel
1,5 liter chamber
16 liter secondary chamber
15,5mm projectile
16mm bore
bal valve with spring trigger

critics are welcome!!! i want to optimize it

[youtube]http://www.youtube.com/watch?v=80YUcVG19rU&feature=mfu_in_order&list=UL[/youtube]
[youtube]http://www.youtube.com/watch?v=7ZveH5uHgdk&feature=mfu_in_order&list=UL[/youtube]
[youtube]http://www.youtube.com/watch?v=C2nP6I77gQU&feature=mfu_in_order&list=UL[/youtube]
[youtube]http://www.youtube.com/watch?v=Hn9B_i-w6YI&feature=mfu_in_order&list=UL[/youtube]

thank you for your view and post!
  • 0

User avatar
apocavorme
Private First Class
Private First Class
 
Posts: 33
Joined: Fri Sep 16, 2011 12:34 am
Reputation: 0

Unread postAuthor: jsefcik » Thu Oct 06, 2011 6:50 pm

For a couple bucks, just put on a pvc chamber,

its pretty neat other wise, maybe some paint
  • 0


jsefcik
Brigadier General
Brigadier General
 
Posts: 1132
Joined: Tue Jun 07, 2011 10:11 am
Reputation: 0

Unread postAuthor: apocavorme » Thu Oct 06, 2011 7:15 pm

i like pet couse its rated mare than 100 psig while my pvc is just 100... and its short and ligth weigth campared to pvc... and cheaper...
  • 0

User avatar
apocavorme
Private First Class
Private First Class
 
Posts: 33
Joined: Fri Sep 16, 2011 12:34 am
Reputation: 0

Unread postAuthor: POLAND_SPUD » Thu Oct 06, 2011 7:53 pm

lol ever heard of ricochets ?
  • 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: apocavorme » Thu Oct 06, 2011 8:08 pm

yes, i was afraidof this, but in the first shot the bullet go into the wall... if u look u can see the hole close to the ground... in the second it came back with little force.. no plrblems;
  • 0

User avatar
apocavorme
Private First Class
Private First Class
 
Posts: 33
Joined: Fri Sep 16, 2011 12:34 am
Reputation: 0

Unread postAuthor: jsefcik » Thu Oct 06, 2011 11:21 pm

POLAND_SPUD wrote:lol ever heard of ricochets ?



ricochets arent even funny im serious, i took a golf ball to my eyebrow, at 80 psi and nearly took my eye out

apocavorme wrote:i like pet couse its rated mare than 100 psig while my pvc is just 100... and its short and ligth weigth campared to pvc... and cheaper...


you can go higher then 100 psi with pvc as long as everything is pressure rated
  • 0


jsefcik
Brigadier General
Brigadier General
 
Posts: 1132
Joined: Tue Jun 07, 2011 10:11 am
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Thu Oct 06, 2011 11:41 pm

Not bad, I like how you put it together.

I concur that the chamber deserves to be a bit stronger, a ball valve can take a lot of pressure so if you replace that bottle with something a little higher spec, you can easily go to 250 psi or so with a good stirrup pump and really see the difference.

15,5mm projectile
16mm bore


Hope you're using wadding ;)
  • 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

Sponsored

Sponsor
 


Unread postAuthor: apocavorme » Fri Oct 07, 2011 1:32 am

hello to all, my problem is that i can only find 100 psig pvc rated where i live :( ...
there is some pvc for hot water rated 300psig but it is much more expensive... i m afraid to use more pressure in this setup.. but i would like to buid a metal setup, but its hard to find metal parts here... i realy want to go 500 psi.. hehhe, i have to buy metal parts from another city, when i do this i ll post!! :D but for now im in the safety limit... the ball valve slow... im building a qev... what do you think for the reload? blow faward or blow backward? (considerind dead space, direction change of flow...)


jackssmirkingrevenge:
sorry i dont understand, my english is poor, what do you mean wadding?
(translator coulndt help me) :lol:
  • 0

User avatar
apocavorme
Private First Class
Private First Class
 
Posts: 33
Joined: Fri Sep 16, 2011 12:34 am
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Fri Oct 07, 2011 2:09 am

Go for higher pressure, you will be impressed. Also a good spring loaded ball valve is a pretty fast valve, if done well it can keep up with a QEV.

apocavorme wrote:sorry i dont understand, my english is poor, what do you mean wadding?
(translator coulndt help me) :lol:


Wadding - something to block the space between the barrel and the bullet, so you will not lose power because air leaks through this space.

The same way they use patches for muzzle loaders.

Image
  • 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

Return to Pneumatic Cannon Database

Who is online

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], Majestic-12 [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'