PCP building blog

[dahakka]

thay aren't bbs,
6.3mm ball bearing
10$ 5000
my aluminum tube is perfect fits
So what must i do now?
more pressure , use a bigger sping , or just use 0.12gr bb?

[wyz2285]

Higher pressure, Of course.

[dahakka]

what kind of pellet you use for your new gun?

[wyz2285]

still bbs, not pellets. But .22 pellets would fit in my barrel too.

[wyz2285]

OK, I almost finished my counter balanced hammer valve (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 Now I don´t know if t will seal...
Pictures, if any of you see any problem, please tell me before something goes wrong

[Brian the brain]

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,

[wyz2285]

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.

[Goats spudz]

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

[wyz2285]

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][/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][/youtube] btw I love his chronograph

[Goats spudz]

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

[wyz2285]

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

[Goats spudz]

Build an anvil

[Brian the brain]

just a blacksmith

hmmm..

Thanks...

[wyz2285]

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.