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PCP building blog

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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Unread postAuthor: dahakka » Mon Mar 19, 2012 9:30 am

thay aren't bbs,
6.3mm ball bearing
10$ 5000 :D
my aluminum tube is perfect fits
So what must i do now?
more pressure , use a bigger sping , or just use 0.12gr bb?
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Last edited by dahakka on Mon Mar 19, 2012 10:06 am, edited 1 time in total.

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Unread postAuthor: wyz2285 » Mon Mar 19, 2012 9:59 am

Higher pressure, Of course.
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: dahakka » Mon Mar 19, 2012 10:08 am

what kind of pellet you use for your new gun?
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Unread postAuthor: wyz2285 » Mon Mar 19, 2012 11:25 am

still bbs, not pellets. But .22 pellets would fit in my barrel too.
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: wyz2285 » Sun Apr 08, 2012 2:25 pm

OK, I almost finished my counter balanced hammer valve :roll: (still need to make a cap, or maybe I will see if it allows blowback semi... Also need to drill the output port)
Full metal except the seal(nylon).
Haven´t try it out yet, also I have made a bad choice: use floating o-ring on the counter piston :cry: Now I don´t know if t will seal...
Pictures, if any of you see any problem, please tell me before something goes wrong :)
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: Brian the brain » Sun Apr 08, 2012 3:12 pm

Apart from sealing problems..

how far can the valvestem move?
Looks like the nylon seal is in the way..

hard to tell from a picture..
The O-ring should be floating.
It should rest against the inner walls of the pipe it runs in and on the front shoulder of the groove,
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Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
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Unread postAuthor: wyz2285 » Sun Apr 08, 2012 3:18 pm

It should rest against the inner walls of the pipe it runs in and on the front shoulder of the groove

It does fit very well inside the tube, should not have leaks. Didn´t understand the "on the front shoulder of the groove" part.
The valvestem moves about 0.5 cm. Good flow, the nylon isn´t on the way.
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: Goats spudz » Sun Apr 08, 2012 4:34 pm

i just ordered a crosman 2250b ratcatcher valve for my new pcp, also i turned the gas tube last week in the Hurco, just waiting for the hydraulic parts, pics tomorrow :D
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Where's my Chuck key?

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Unread postAuthor: wyz2285 » Tue Apr 24, 2012 1:21 pm

After watching Goats spudz`s pcp, I realised that it´s not worthy to continue this project, it will never look as good as a machined one, even through he didn´t even design the valve...
So, I thought I need good machines, guess what I have found out? My aunt it´s a director of this company, witch means I have free access to any type of machines and materials available there.
All I have to do now, is learn how to make blue prints, also how to use Solidwork in case I wants parts to be cnced.
That´s why, from now you guy won´t see any build from me until october, besides my current building hybrid.
Oh, and what I´m aiming at is something like this: [youtube]http://www.youtube.com/watch?v=oemH8xhyw6g&list=FLOv1720IFInlmbjVF1IDbAw&index=1&feature=plpp_video[/youtube]
And probably I will be able to use a 12 solenoid to fire it, just have to study a little more about the counter-balanced hammer valve: [youtube]http://www.youtube.com/watch?v=xat3Pzm-RFQ&feature=context&context=C48c2112ADvjVQa1PpcFOWPO9BVDAxlRhl4jhsAYIauz_W41twOLg=[/youtube] btw I love his chronograph :roll:
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: Goats spudz » Tue Apr 24, 2012 3:02 pm

Hey wyz if you encased yours in wood and made it like btb's old shat it would look great, and the internals dont matter look at my ghetto check valve and i made a valve but it was scrapped because of inconsistency also all the shiny parts were hand polished with wet and dry, you should carry on its a learning experience :D
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Where's my Chuck key?

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Unread postAuthor: wyz2285 » Tue Apr 24, 2012 4:23 pm

carry on its a learning experience

I won´t learn not much more now, what I need now it´s theory/math/physics, as I´m not planning to be just a blacksmith :wink:
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: Goats spudz » Tue Apr 24, 2012 4:38 pm

Build an anvil :D
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Where's my Chuck key?

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Unread postAuthor: Brian the brain » Thu Apr 26, 2012 12:58 pm

just a blacksmith


hmmm.. :roll:

Thanks... :D
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Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
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Unread postAuthor: wyz2285 » Thu Apr 26, 2012 2:48 pm

Sorry, not intended to offend anybody, personally I like to work as a blacksmith or a carpenter, but for my own future well-be I have to aim higher.
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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