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 55 users online :: 3 registered, 0 hidden and 52 guests


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

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

The Team
Administrators
Global Moderators
global_moderators.png CS

Spring powered ball valve.

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: Jack_Hogg » Tue Mar 18, 2008 1:21 am

Hmm, do you guys have an idea how to add a piston? please in diagram, (thanks for all your help)
  • 0

User avatar
Jack_Hogg
Sergeant First Class
Sergeant First Class
 
Posts: 133
Joined: Tue Feb 20, 2007 7:56 am
Reputation: 0

Unread postAuthor: Hubb » Tue Mar 18, 2008 1:45 am

Maybe like this:
  • 0

Attachments
untitled1.jpg
untitled1.jpg (8.86 KiB) Viewed 348 times
User avatar
Hubb
Major General
Major General
 
Posts: 2390
Joined: Mon May 28, 2007 8:39 am
Location: South Georgia
Reputation: 2

Unread postAuthor: psycix » Tue Mar 18, 2008 7:19 am

Yup that should do it.
  • 0

Till the day I'm dieing, I'll keep them spuddies flying, 'cause I can!

Spudfiles steam group, join!
User avatar
psycix
Donating Member
Donating Member
 
Posts: 3684
Joined: Mon Jun 25, 2007 7:12 am
Location: The Netherlands
Reputation: 0

Unread postAuthor: Jack_Hogg » Tue Mar 18, 2008 9:04 am

That's a good idea, but i've made my own disign, with you're idea. but i have some questions.. becouse, when i want to reload after i shot, how does the piston go in his rest position? couse when i've shot, the piston goes back, and the compressed air can flow. but if i want to refill it, i guess the piston stays back and the air goes directly to the barrel and can not be compressed.. how can i solve this problem?
here is my disign:Image
  • 0

User avatar
Jack_Hogg
Sergeant First Class
Sergeant First Class
 
Posts: 133
Joined: Tue Feb 20, 2007 7:56 am
Reputation: 0

Unread postAuthor: Carlman » Tue Mar 18, 2008 9:12 am

a barrel sealing piston is filled via the pilot side (behind of the piston) so if you refill it pushes it forward thus sealing barrel.
  • 0

Image
Aussie spudders unite!!
User avatar
Carlman
Major General
Major General
 
Posts: 1618
Joined: Sat Nov 24, 2007 1:18 am
Location: Western Australia
Reputation: 0

Unread postAuthor: Jack_Hogg » Tue Mar 18, 2008 9:14 am

but i refill it in the stock
  • 0

User avatar
Jack_Hogg
Sergeant First Class
Sergeant First Class
 
Posts: 133
Joined: Tue Feb 20, 2007 7:56 am
Reputation: 0

Unread postAuthor: Jack_Hogg » Tue Mar 18, 2008 10:24 am

Is this a good alternative then?
Image
  • 0

User avatar
Jack_Hogg
Sergeant First Class
Sergeant First Class
 
Posts: 133
Joined: Tue Feb 20, 2007 7:56 am
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: Carlman » Tue Mar 18, 2008 10:27 am

just keep your design before this last one and fill from the pilot
  • 0

Image
Aussie spudders unite!!
User avatar
Carlman
Major General
Major General
 
Posts: 1618
Joined: Sat Nov 24, 2007 1:18 am
Location: Western Australia
Reputation: 0

Unread postAuthor: Hubb » Tue Mar 18, 2008 4:45 pm

If you are refilling through the stock, you should put a spring behind the piston. This will cause it to reseal on the barrel surface.

Oh, and I think I'm missing something on that alternative design. Can you explain it?
  • 0

User avatar
Hubb
Major General
Major General
 
Posts: 2390
Joined: Mon May 28, 2007 8:39 am
Location: South Georgia
Reputation: 2

Unread postAuthor: psycix » Tue Mar 18, 2008 5:01 pm

Your alternative is kinda weird
You will need to use o-rings and make sure you will have a 100% seal.
It will be hard.

Use a normal piston
Just fill it from the pilot side and not from the stock.
  • 0

Till the day I'm dieing, I'll keep them spuddies flying, 'cause I can!

Spudfiles steam group, join!
User avatar
psycix
Donating Member
Donating Member
 
Posts: 3684
Joined: Mon Jun 25, 2007 7:12 am
Location: The Netherlands
Reputation: 0

Unread postAuthor: SpudBlaster15 » Tue Mar 18, 2008 5:40 pm

DYI wrote:
However, I'm pretty sure that the ball valve to which I briefly attached a flash powder driven ram opened in only a few milliseconds.


It's good to see that one of us finally tried it.

And if possible, I want to see a picture of whatever was left of the valve and the ram afterward :lol:


The ram, well... "disappeared" after pulling its mounting bolt through 3 inches of wood, and leaving splinters all over the place. No recovered remains.

The ball valve handle on the other hand, was bent almost 45 degrees past fully open. I will take a picture of that when I get home.
  • 0

People should not be afraid of their governments. Governments should be afraid of their people.
User avatar
SpudBlaster15
Major General
Major General
 
Posts: 2385
Joined: Wed Oct 18, 2006 11:12 pm
Location: Canada
Country: Poland (pl)
Reputation: 3

Unread postAuthor: Jack_Hogg » Wed Mar 19, 2008 12:59 am

hubb017 wrote:Oh, and I think I'm missing something on that alternative design. Can you explain it?


Well, the alternative design is that the pressure is on the piston, and when you pull (the rod that's hold the piston), the piston goes backward and the air can flow very quickly to the barrel. So, there is a lot of tension on the pulling rod that holds the piston.

But i've already make the stock before i started this topic. So i have to choose the best alternative. And what if i choose my first piston disign and i get a spring behind it, can the piston go backward if i fire it?
  • 0

User avatar
Jack_Hogg
Sergeant First Class
Sergeant First Class
 
Posts: 133
Joined: Tue Feb 20, 2007 7:56 am
Reputation: 0

Unread postAuthor: watto » Wed Mar 19, 2008 3:39 am

Jack_Hogg wrote:And what if i choose my first piston disign and i get a spring behind it, can the piston go backward if i fire it?


If you have a nice big pilot valve and dont use a really strong spring the piston will move back easily and the spring should serve as a good bumper aswell
  • 0

User avatar
watto
Captain
Captain
 
Posts: 327
Joined: Wed Dec 13, 2006 5:47 pm
Location: Australia
Reputation: 0

Unread postAuthor: Jack_Hogg » Wed Mar 19, 2008 6:53 am

Alright, i'll do that. Thanks for all for your help people;)
I really appreciated it.


Topic can be closed.
  • 0

User avatar
Jack_Hogg
Sergeant First Class
Sergeant First Class
 
Posts: 133
Joined: Tue Feb 20, 2007 7:56 am
Reputation: 0

Unread postAuthor: sniper hero » Wed Mar 19, 2008 10:36 am

i'm making a gun with the same design but I thought to place the piston were now the elbow is that forms a V
it decreases the chamber volume but makes it easier to put a valve that opens the pilot chamber
  • 0

User avatar
sniper hero
Captain
Captain
 
Posts: 332
Joined: Fri Mar 07, 2008 3:12 pm
Reputation: 0

Previous

Return to Pneumatic Cannon Discussion

Who is online

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

cron
Reputation System ©'