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Cannons powered by pneumatic pressure (compressed gas) using a valve or other release.
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wyz2285
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Update: finished new valve working :D
Video: [youtube][/youtube]
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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killerbanjo
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Wow thats really smart! The stem from a blowgun?
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wyz2285
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First I wanted to use a blowgun stem, but it's too short, so I machined it out of a m4 screw.
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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Cosmic Muffin
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Thats an awesome project you have there. Nice clean build. What sort of rifle will it resemble upon completion or are you have you designed something new?
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wyz2285
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6mm airsoft sniper rifle, just a simple clean PCP.
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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Gun Freak
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Just need to add a barrel...
[youtube][/youtube]

There is black stuff coming out of my quick connect... I think it's oil... Is that bad?
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Brian the brain
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I assume you keep the fridgecompressor oiled up..
Both for lubrication and cooling..

So that's where the oil comes from.


LOL...The only dieseleffect I can be 100% sure about is my old fridgy dieseling at about 60 bar...

:D

Both PCP's are coming along nicely!
You guys just need to polish them...

:wink:
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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Gun Freak
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Ok I was just wondering if it was supposed to spit oil out when I disconnect the air line :lol:

All I need is a barrel sleeve, I already have the tightbore barrel... :)
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POLAND_SPUD
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damn it's nice...
but don't you think you need a stronger spring?

I think it's oil... Is that bad
it's 100% normal... you can build a high pressure air filter that will stop almost all oil and also some water
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jackssmirkingrevenge
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POLAND_SPUD wrote:but don't you think you need a stronger spring?
Yup, sounds pretty weak... but still, very nice effort :)
hectmarr wrote:You have to make many weapons, because this field is long and short life
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wyz2285
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From the pressure drop, the shots should be ok...
So you used a rotating hammer after all :D
Any idea about the stock?
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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Gun Freak
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Yep, rotating hammer FTW!!! :D but yes the spring is very weak so I'm adding another extention spring, a stronger one, in addition to this one. The sound is very deceiving though. It is pretty loud and it lets out a nice thump of air, but it will only open the valve enough at 300 psi. I want to use 400 psi, so I'm putting the extra spring.

Eventually I may get a higher psi gauge so I can use ~600 psi... But that's eventually. I'm not sure I trust soldered copper :roll:

For the stock... Probably something simple that I'll make from PVC, and I'll attach it using the machine screws sticking out of the handle.

Thanks for the input on the compressor, guys. One more question— when I use a pressurized input on my fridgy, it sounds like the input air fills a large volume. Is all that pressure going on the inside of the compressor shell?
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POLAND_SPUD
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Is all that pressure going on the inside of the compressor shell?
yes, that's right
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Gun Freak
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Oh I didn't know that :shock: how much is safe to use? I've been using 40...
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POLAND_SPUD
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most fridge compressors have pressure rating stamped/printed somewhere on them - that's exactly the reason why (because the case is normally exposed to pressure from te circuit)
most of those that I've seen are rated to ~20 bar so you should be fine with 40 or even 100 psi
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