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It Finally Works!(well...sort of)

A place to ask general spud cannon related questions.
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Do you like my In-line piston design?

It's awesome! I'm gonna build me one of them as soon as I can!
3
43%
It's pretty nice! But not really something I'm interested in.
2
29%
Mehhhh It's alright.
1
14%
You spent months building that piece of crap? It sucks!
0
No votes
Scrap the project immediatley before I make you!
1
14%
 
Total votes : 7
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It Finally Works!(well...sort of)

Unread postAuthor: maverik94 » Fri Jul 23, 2010 2:30 pm

Ok, I have been working on my in-line piston design for quite a while now, a few months at least. I know that in principle it would work, but the problem was that it was kinda difficult to get it to work :) . Well...today was a very hot and humid day (Heat index of near 110 f) :shock: and I really didn't feel like doing much because of the heat...but I dragged myself out of the house and into my workshop and decided to work on my prototype.....and lo and behold with some tinkering and modification it worked!!well...sort of. It still leaks a bit at the seal, but I think I can fix that. Anyway, i don't believe this design has ever been built (by anyone on Spudfiles at least). But I have to give credit for most of its design to JSR, who designed something very similar to this design in his Preloaded Pneumatic Cartridge design. Anyway, it's a fairly simple design, I think you can figure out how it works without me going into a big explanation, but if you have any questions...just ask. Btw, the reason I put this in this section and not the showcase is because it isn't a complete gun or anything. When I do build a complete gun with this design, i will post it in the Showcase. The advantage of this type of piston valve is that it has near the compactness of a co-axial gun, but it can be loaded from the breech, like a regular barrel-sealer. Anyway, here are some pictures.
First, the complete, assembled prototype. On the right is the schrader, which acts as the pilot valve, and the pipe in the center acts as the chamber, and the fittings on the left side is where the barrel goes into:
Image
The second is the complete prototype dismantled, the piston is in the center on the bottom:
Image
Finally, here is a close-up of the homemade piston:
Image
Anyway, I hope you enjoyed it! Feel free to comment, give constructive criticism, or ask questions.
-Maverik94
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"You can't be friends with anyone if you aren't friends with yourself."
"I'd rather be hated for who I am, than loved for who I'm not." -André Gide
Give me a lever long enough, and a fulcrum on which to place it and I shall move the world.
–Archimedes
Defeat is always momentary.
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Current Project: None, I'm in Spudremission.
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Unread postAuthor: qwerty » Fri Jul 23, 2010 2:59 pm

Hmmmm, i dont realy understand how it works. Interesting though.

EDIT: oh i do now, just looked at the link...
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Unread postAuthor: maverik94 » Fri Jul 23, 2010 3:25 pm

Hmmmm, i dont realy understand how it works. Interesting though.

EDIT: oh i do now, just looked at the link...

Good :wink: So what do you think?
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"You can't be friends with anyone if you aren't friends with yourself."
"I'd rather be hated for who I am, than loved for who I'm not." -André Gide
Give me a lever long enough, and a fulcrum on which to place it and I shall move the world.
–Archimedes
Defeat is always momentary.
–Carl Denham

Current Project: None, I'm in Spudremission.
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Unread postAuthor: the unit » Fri Jul 23, 2010 3:38 pm

Its a toolies valve, it has been made a couple times before on this site. Wiki
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Unread postAuthor: maverik94 » Fri Jul 23, 2010 4:04 pm

Its a toolies valve, it has been made a couple times before on this site. Wiki
Oh wow...so it is! I had never seen that before! As i said, I just saw the design on JSR's Pneumatic Cartridge design thing. I had never seen it used before on this site...but i guess I was wrong! Ah well... :?
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"You can't be friends with anyone if you aren't friends with yourself."
"I'd rather be hated for who I am, than loved for who I'm not." -André Gide
Give me a lever long enough, and a fulcrum on which to place it and I shall move the world.
–Archimedes
Defeat is always momentary.
–Carl Denham

Current Project: None, I'm in Spudremission.
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Unread postAuthor: POLAND_SPUD » Fri Jul 23, 2010 4:44 pm

well so far it looks good... ohh that one vote for 'Scrap the project immediatley before I make you!' is mine... lol sorry but it was so tempting
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Unread postAuthor: maverik94 » Fri Jul 23, 2010 5:07 pm

well so far it looks good... ohh that one vote for 'Scrap the project immediatley before I make you!' is mine... lol sorry but it was so tempting
Thanks! Haha. did you like those poll choices? :D
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"You can't be friends with anyone if you aren't friends with yourself."
"I'd rather be hated for who I am, than loved for who I'm not." -André Gide
Give me a lever long enough, and a fulcrum on which to place it and I shall move the world.
–Archimedes
Defeat is always momentary.
–Carl Denham

Current Project: None, I'm in Spudremission.
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Unread postAuthor: POLAND_SPUD » Fri Jul 23, 2010 5:25 pm

did you like those poll choices?
yeap :D
nice design have considered using oring seals instead ?
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Unread postAuthor: jackssmirkingrevenge » Fri Jul 23, 2010 5:40 pm

maverik94 wrote:I just saw the design on JSR's Pneumatic Cartridge design thing. I had never seen it used before on this site...but i guess I was wrong! Ah well... :?


The idea of a "spool" type piston is several hundred years old so nothing new under the sun. Looks very neat, I'm guessing you'll be taking it to significantly high pressures?
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Unread postAuthor: maverik94 » Fri Jul 23, 2010 6:43 pm

nice design have considered using oring seals instead ?

Ummmm...I'm using inner-tube, and that has worked well for me before...
The idea of a "spool" type piston is several hundred years old so nothing new under the sun. Looks very neat, I'm guessing you'll be taking it to significantly high pressures?

Lol. I never claimed to have really "invented" anything new here! lol. It's just that this type of valve is not too common on Spudfiles. :) And yeah, i have only taken it to about 140 psi so far with my tire pump, but I have a shock pump, so I'll be taking it up 400 psi soon :wink:
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"You can't be friends with anyone if you aren't friends with yourself."
"I'd rather be hated for who I am, than loved for who I'm not." -André Gide
Give me a lever long enough, and a fulcrum on which to place it and I shall move the world.
–Archimedes
Defeat is always momentary.
–Carl Denham

Current Project: None, I'm in Spudremission.
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Unread postAuthor: jackssmirkingrevenge » Fri Jul 23, 2010 6:48 pm

maverik94 wrote:Lol. I never claimed to have really "invented" anything new here!


Never said you did, just pointing out that I never "invented" it either ;)

What's this going in then? High pressure small calibre single shot pistol/rifle?
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Unread postAuthor: maverik94 » Fri Jul 23, 2010 7:20 pm

Never said you did, just pointing out that I never "invented" it either
What's this going in then? High pressure small calibre single shot pistol/rifle?

Haha, ok, I gotcha!
Ummm, I'm planning on making it into a .25 cal. handgun of some sort I think.
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"You can't be friends with anyone if you aren't friends with yourself."
"I'd rather be hated for who I am, than loved for who I'm not." -André Gide
Give me a lever long enough, and a fulcrum on which to place it and I shall move the world.
–Archimedes
Defeat is always momentary.
–Carl Denham

Current Project: None, I'm in Spudremission.
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