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 54 users online :: 5 registered, 0 hidden and 49 guests


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

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

The Team
Administrators
Global Moderators
global_moderators.png CS

Piston problem.

A place to ask general spud cannon related questions.
Sponsored 
  • Author
    Message

Piston problem.

Unread postAuthor: )DEMON( » Mon Jun 26, 2006 4:10 pm

Well, I don't know what I can get to seal my piston right, it has to seal against a odd surface.What can I do :?: Mabey my design isn't right,all I can do now is change the piston and nothing else.
  • 0

Attachments
piston problem.JPG
This is very close to what I have made.
Forever dreaming...
User avatar
)DEMON(
Major General
Major General
 
Posts: 1391
Joined: Sun Mar 12, 2006 1:22 pm
Location: Johannesburg South Africa
Reputation: 0

Unread postAuthor: CS » Mon Jun 26, 2006 5:18 pm

What are you using as the sealing face? Yea, your sealing area is weird, but because of the "funnel" shape of the bushing I would think that it would center. What are you using to fill the cannon? Secondly, your equilization point may be to big for your air source.
  • 0

User avatar
CS
Donating Moderator
Donating Moderator
 
Posts: 1897
Joined: Fri Feb 18, 2005 5:32 pm
Location: Southern Utah
Country: United States (us)
Reputation: 4

Unread postAuthor: jrrdw » Mon Jun 26, 2006 5:23 pm

Well after seeing what you have, you could make a new piston with the head sticking slightly inside the barrel and a round rubber washer or big oring rite around the bottem of the inserted part that slides into the barrel. Use the end of the barrel as a guide when building the new piston. Maby??
  • 0

When life gives you lemons...throw them back they suck!
User avatar
jrrdw
Donating Moderator
Donating Moderator
 
Posts: 6538
Joined: Wed Nov 16, 2005 5:11 pm
Location: Maryland
Country: United States (us)
Reputation: 25

Unread postAuthor: saladtossser » Mon Jun 26, 2006 5:53 pm

the barrel should stick out of the bushing
  • 0

"whoa... I thought pimpmann was black..."-pyromanic13
User avatar
saladtossser
Brigadier General
Brigadier General
 
Posts: 1234
Joined: Sat Mar 26, 2005 10:40 am
Location: Toronto
Reputation: 0

Unread postAuthor: )DEMON( » Tue Jun 27, 2006 1:41 am

I am going to have to experiment with sealing faces I think.I won't put an equilization point because the piston dosn't fit prfectly inside the larger pvc(about 1mm of play).This will also held to seal the piston.What should I use washers or o rings?
  • 0

Forever dreaming...
User avatar
)DEMON(
Major General
Major General
 
Posts: 1391
Joined: Sun Mar 12, 2006 1:22 pm
Location: Johannesburg South Africa
Reputation: 0

Unread postAuthor: wakkapooo » Tue Jun 27, 2006 2:30 am

I am making a valve almost identical to this one, except chamber sealing. I am using, for the main seal, a "toilet shank ring" or something like that. I've found it fits perfectly with the funnel shape of the bushing. As for the rear end of the piston, I am using a disassembled "test plug." In between is a "cast iron adapter" fitting (PVC), which is just a touch smalller than normal 2" pipe I will post a picture of my prototype piston if wanted.
  • 0

User avatar
wakkapooo
Private
Private
 
Posts: 1
Joined: Mon Jun 26, 2006 11:27 pm
Reputation: 0

Unread postAuthor: )DEMON( » Tue Jun 27, 2006 5:07 am

Thanks,you just gave me a few ideas,I'll be sure to test some of those 'toilet washers'.
  • 0

Forever dreaming...
User avatar
)DEMON(
Major General
Major General
 
Posts: 1391
Joined: Sun Mar 12, 2006 1:22 pm
Location: Johannesburg South Africa
Reputation: 0

Sponsored

Sponsor
 


Return to General Spud Cannon Related

Who is online

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

Reputation System ©'