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 :: 4 registered, 0 hidden and 50 guests


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

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

The Team
Administrators
Global Moderators
global_moderators.png CS

Cup Shape Piston

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

Unread postAuthor: jrrdw » Sun Dec 20, 2009 8:28 pm

Try and get it centered as possible. Does that hole in the center go all the way through? Can use it to hold the seal and washer but it will need sealed with JB Weld or simular.
  • 0

When life gives you lemons...throw them back they suck!
User avatar
jrrdw
Donating Moderator
Donating Moderator
 
Posts: 6540
Joined: Wed Nov 16, 2005 5:11 pm
Location: Maryland
Country: United States (us)
Reputation: 25

Unread postAuthor: RabidDuck » Sun Dec 20, 2009 8:44 pm

no i'm going to smooth it all out tomorrow. Do you think i should fill it and try centering it better or will it work? The hole doesn't go all the way through.
  • 0

User avatar
RabidDuck
Sergeant
Sergeant
 
Posts: 82
Joined: Sat Nov 01, 2008 10:11 am
Location: Minnesota, United States
Reputation: 0

Unread postAuthor: jrrdw » Sun Dec 20, 2009 9:03 pm

See if you can work with what you have all ready, if you sand on the thicker part it will bring the hole to center. I think your doing a good job so far.
  • 0

When life gives you lemons...throw them back they suck!
User avatar
jrrdw
Donating Moderator
Donating Moderator
 
Posts: 6540
Joined: Wed Nov 16, 2005 5:11 pm
Location: Maryland
Country: United States (us)
Reputation: 25

Unread postAuthor: psycix » Mon Dec 21, 2009 9:30 am

Your paint skills are awful!
Good to see our moderator still does some spudding though. :)


There is completely no need for the channels leading to the barrel, just make the hole larger, like JSR's design.
JSR's design also uses a bolt to hold the sealing face, which is more reliable then glue.
  • 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: jrrdw » Mon Dec 21, 2009 9:42 am

psycix wrote:Your paint skills are awful!


For 2 minutes time, that is awsome not awful. Now if I used MS Paint on a regular basis, well......

If your any better, inlighten us with your paint skills. :wink:

Do not confuse this post with anything other then a attempt to trick you into doing a better job of creating this diagram then I did, it is indeed exactly that :D .
  • 0

When life gives you lemons...throw them back they suck!
User avatar
jrrdw
Donating Moderator
Donating Moderator
 
Posts: 6540
Joined: Wed Nov 16, 2005 5:11 pm
Location: Maryland
Country: United States (us)
Reputation: 25

Unread postAuthor: roboman » Mon Dec 21, 2009 11:22 am

I would suggest a forstner bit for the center hole....much easier to use (in this case) than a holesaw.
  • 0

ilovetoblowthingsup wrote: The yellow/orange back fits super snugly, very nice in fact, but the head does not fit.
User avatar
roboman
Sergeant Major
Sergeant Major
 
Posts: 176
Joined: Tue Nov 25, 2008 11:18 pm
Location: Long Beach, CA
Reputation: 0

Unread postAuthor: jeepkahn » Tue Dec 22, 2009 4:27 pm

AHEM... here's some pics of 2" and 4"....
  • 0

Attachments
t_inside_of_piston_145.jpg
2" piston/cup
t_inside_of_piston_145.jpg (24.36 KiB) Viewed 611 times
t_golfgun_piston_166.jpg
4" cup/piston
t_golfgun_piston_166.jpg (20.62 KiB) Viewed 611 times
My Cannons can be found by clicking the following link.
http://www.spudfiles.com/forums/viewtop ... tml#256896

jeepkahn
Colonel
Colonel
 
Posts: 747
Joined: Fri Jan 09, 2009 1:11 pm
Location: Triad, NC, USA
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: jrrdw » Tue Dec 22, 2009 4:44 pm

When did you build these?
  • 0

When life gives you lemons...throw them back they suck!
User avatar
jrrdw
Donating Moderator
Donating Moderator
 
Posts: 6540
Joined: Wed Nov 16, 2005 5:11 pm
Location: Maryland
Country: United States (us)
Reputation: 25

Unread postAuthor: jeepkahn » Tue Dec 22, 2009 5:52 pm

jrrdw wrote:When did you build these?


the 4" was for dd-1(about a year ago), and the 2" was a coupla months before that...
  • 0

My Cannons can be found by clicking the following link.
http://www.spudfiles.com/forums/viewtop ... tml#256896

jeepkahn
Colonel
Colonel
 
Posts: 747
Joined: Fri Jan 09, 2009 1:11 pm
Location: Triad, NC, USA
Reputation: 0

Unread postAuthor: POLAND_SPUD » Tue Dec 22, 2009 8:15 pm

lol jrrdw & JSR
two spudders one cup :D

I've got to admit jrrdw that you paint skillz are even worse than mine... and yeah I agree with psycix that jsr's idea is better and simpler to implement (unless I am missing something?)
  • 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: jrrdw » Tue Dec 22, 2009 8:20 pm

Poland_Spud wrote:lol jrrdw & JSR
two spudders one cup



and our cup runith over! :P
  • 0

When life gives you lemons...throw them back they suck!
User avatar
jrrdw
Donating Moderator
Donating Moderator
 
Posts: 6540
Joined: Wed Nov 16, 2005 5:11 pm
Location: Maryland
Country: United States (us)
Reputation: 25

Unread postAuthor: jackssmirkingrevenge » Tue Dec 22, 2009 11:46 pm

POLAND_SPUD wrote:two spudders one cup shaped piston


OH FFS!!! And I though2 girls 1 CPU was bad!

:D :D :D
  • 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: RabidDuck » Wed Dec 23, 2009 8:38 pm

haha update here. needs some more smoothing out but it's getting there. It's kinda hard to do Jrrdw's design now that i sanded out too much so i think it maybe just be a regular cup piston with out all the vent holes and such but here are the pictures. I sanded this out while standing outside while it was snowing, brrrrrrrrrr.

http://img163.imageshack.us/gal.php?g=piston21001.jpg
  • 0

User avatar
RabidDuck
Sergeant
Sergeant
 
Posts: 82
Joined: Sat Nov 01, 2008 10:11 am
Location: Minnesota, United States
Reputation: 0

Unread postAuthor: jrrdw » Thu Dec 24, 2009 1:41 pm

As long as you get your sealing surface flat as can be, this should work.

The question seems to be how well.......
  • 0

When life gives you lemons...throw them back they suck!
User avatar
jrrdw
Donating Moderator
Donating Moderator
 
Posts: 6540
Joined: Wed Nov 16, 2005 5:11 pm
Location: Maryland
Country: United States (us)
Reputation: 25

Unread postAuthor: Willdebeers » Thu Dec 24, 2009 1:49 pm

I always had a problem with sealing, and I found that if you mark off the line you want to cut, then sand it off after, you usually get a relitivley flat sealing face.


Of course, I just use my lathe :D
  • 0

Image
User avatar
Willdebeers
2nd Lieutenant
2nd Lieutenant
 
Posts: 214
Joined: Tue Feb 03, 2009 1:18 pm
Reputation: 0

Previous

Return to General Spud Cannon Related

Who is online

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

Reputation System ©'