Cup Shape Piston
- jrrdw
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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.
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.
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.
- jrrdw
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For 2 minutes time, that is awsome not awful. Now if I used MS Paint on a regular basis, well......psycix wrote:Your paint skills are awful!
If your any better, inlighten us with your paint skills.

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

I would suggest a forstner bit for the center hole....much easier to use (in this case) than a holesaw.
ilovetoblowthingsup wrote: The yellow/orange back fits super snugly, very nice in fact, but the head does not fit.
AHEM... here's some pics of 2" and 4"....
- Attachments
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- 4" cup/piston
- t_golfgun_piston_166.jpg (20.62 KiB) Viewed 2438 times
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- 2" piston/cup
- t_inside_of_piston_145.jpg (24.36 KiB) Viewed 2438 times
My Cannons can be found by clicking the following link.
http://www.spudfiles.com/forums/viewtop ... tml#256896
http://www.spudfiles.com/forums/viewtop ... tml#256896
the 4" was for dd-1(about a year ago), and the 2" was a coupla months before that...jrrdw wrote:When did you build these?
My Cannons can be found by clicking the following link.
http://www.spudfiles.com/forums/viewtop ... tml#256896
http://www.spudfiles.com/forums/viewtop ... tml#256896
- POLAND_SPUD
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lol jrrdw & JSR
two spudders one cup
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?)
two spudders one cup

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?)
Children are the future
unless we stop them now
unless we stop them now
- jackssmirkingrevenge
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hectmarr wrote:You have to make many weapons, because this field is long and short life
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
http://img163.imageshack.us/gal.php?g=piston21001.jpg
- Willdebeers
- Specialist 2
- Posts: 214
- Joined: Tue Feb 03, 2009 1:18 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
Of course, I just use my lathe

