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kind of paintball gun... Updated! v2

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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kind of paintball gun... Updated! v2

Unread postAuthor: stereohead » Tue Feb 12, 2008 4:40 pm

Hey guys,

I've some ideas for a diy paintball gun, i've never done something like this before, so can you people check it?

A picture says more than 10^10 words, so check my attachment below.

Darker blue = Higher Presure

Grts Roel


/edit:
v2 is on the bottom of this page
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Unread postAuthor: thespeedycicada » Tue Feb 12, 2008 5:05 pm

it might work but i think the air will just slowly leak out without cycling the valve.
jsr has alot of experience with this phenomenon. :D
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current projects: co-axial piston valve.Status DONE!
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Unread postAuthor: Davidvaini » Tue Feb 12, 2008 5:08 pm

the hard part will be getting the inner barrel/open port for your magazine or gravity feed to be centered properly but still be able to maintain the pressure...

I also would think that the release of the pressure wouldn't be so quick and would slowly leak
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Unread postAuthor: stereohead » Tue Feb 12, 2008 5:14 pm

@thespeedycicada

Tnx for your reply.

Near which valve do you thing the air wil leak out?
When the valve is in the middle, all gaps are covered...



(btw: who is jsr ? )

@Davidvaini
When i make the prototype, ik will make more gaps, so i think the air will release fast enough
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Unread postAuthor: Davidvaini » Tue Feb 12, 2008 5:22 pm

the air would leak at your gravity feed right before it fires... that is if im reading the diagram correctly...
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Unread postAuthor: stereohead » Tue Feb 12, 2008 5:28 pm

eeh im sorry but what is "gravity feed"

my english is a bit poor :oops:
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Unread postAuthor: fretmelter » Tue Feb 12, 2008 5:58 pm

that is where your amo is comming from

like in paintball it is called a gravity feed hopper. and when it deos leak there then the amo will be forced up causing it to not load.

also if u have no trigger system it will cycle very fast

cycle: going through the firing sequence

and this is bad cuz then it wont load.
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Unread postAuthor: thespeedycicada » Tue Feb 12, 2008 7:09 pm

what i mean is it wont cycle it will just go Poofssssssssssssssssssssssssssssssssss until no more air is supplied.

@fretmelter if this actually does cycle i doubt it will be to fast and if that is a problem a blowgun instead of dirct link to the chamber is all that is needed.
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current projects: co-axial piston valve.Status DONE!
S.P.E.C.S update mk 1 construction begining in febuary all the maths for it are done plans are drawn up and parts are listed.
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Unread postAuthor: fretmelter » Tue Feb 12, 2008 7:30 pm

true, so he will have to make it very air tight.

also how much psi are u going to take it too.

and mey i ask why u have sooo many chambers?? it seems like the tube after the large chamber (where your air suply is) can be eliminated.
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Last edited by fretmelter on Tue Feb 12, 2008 7:36 pm, edited 1 time in total.

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Unread postAuthor: thespeedycicada » Tue Feb 12, 2008 7:36 pm

Put a blowgun where the air resevoir is so you have control of how much air pressure gets in.
But as i said before i highly doubt it will cycle.
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current projects: co-axial piston valve.Status DONE!
S.P.E.C.S update mk 1 construction begining in febuary all the maths for it are done plans are drawn up and parts are listed.
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Unread postAuthor: fretmelter » Tue Feb 12, 2008 7:44 pm

ok ok ill leave it at that. First lets see it cycle then we can procrastinate.
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Unread postAuthor: stereohead » Wed Feb 13, 2008 1:23 am

I didn't draw the trigger system, but i have plans for that. I think the left piston will not go back automaticly, but ik can make a handle or somthing for that.

@fretmelter i see the leak, ik will use one more o-ring to fix that.



Tnx for all your comments, i will try to make a prototype soon.
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Unread postAuthor: stereohead » Wed Feb 13, 2008 2:13 pm

Hey,

I made a new design. Which is - i hope - better then the prervious.
Less parts, so less work :)
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Unread postAuthor: fretmelter » Wed Feb 13, 2008 2:44 pm

what causes the red part to go back first?
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Projects:
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Unread postAuthor: stereohead » Wed Feb 13, 2008 2:48 pm

The spring in the green part will push it back.
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