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Finally, My final plans!

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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Finally, My final plans!

Unread postAuthor: elad311 » Thu Nov 20, 2008 6:41 am

Here are my final plans for the pneumatic,
the barrel is 1"
the stock is 1"
and the camber, is 2".
All the pieces will be threaded and i already have the most of the parts! :D
I think it will be an awesome pneumatic!
here:
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Unread postAuthor: psycix » Thu Nov 20, 2008 7:20 am

Not bad.
Chamber is somewhat large I think.
And whats with the excessive use of those elbows?
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Unread postAuthor: Demon » Thu Nov 20, 2008 7:24 am

What will you shoot with that?
Try chick peas with a wadding :wink:

And whats with the excessive use of those elbows?


Psycix is right, this will put a lot of flow restriction...
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Unread postAuthor: elad311 » Thu Nov 20, 2008 7:53 am

Demon wrote:
Psycix is right, this will put a lot of flow restriction...


Well, do you have any suggestion for something else?
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Unread postAuthor: starman » Thu Nov 20, 2008 8:55 am

And why all threaded parts? Sealing becomes more of a challenge.

Chamber could be 1/2 or even 1/3 that length.
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Unread postAuthor: elad311 » Thu Nov 20, 2008 9:27 am

All threaded parts, because i can't find any PVC glue
in my country, so i have to use threaded with teflon.
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Unread postAuthor: starman » Thu Nov 20, 2008 9:29 am

elad311 wrote:All threaded parts, because i can't find any PVC glue
in my country, so i have to use threaded with teflon.


They sell PVC but no cement? What country are you from Elad?
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Unread postAuthor: Ragnarok » Thu Nov 20, 2008 9:33 am

elad311 wrote:Well, do you have any suggestion for something else?

Yes - you see that cluster of the three elbows in the bottom left? Swap them out with just one - Less parts to buy, less joints, and less flow restriction.

End result should resemble this more:
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Unread postAuthor: elad311 » Thu Nov 20, 2008 9:49 am

starman wrote:
elad311 wrote:All threaded parts, because i can't find any PVC glue
in my country, so i have to use threaded with teflon.


They sell PVC but no cement? What country are you from Elad?


Well, i'm from israel, and yes, i asked for cement in every store...
and i couldn't even found a good PVC, every pvc (but not threaded) is a
'hot water PVC' and it's very thin.

Ragnarok wrote:
elad311 wrote:Well, do you have any suggestion for something else?

Yes - you see that cluster of the three elbows in the bottom left? Swap them out with just one - Less parts to buy, less joints, and less flow restriction.

End result should resemble this more:


thanx, for the plan, Ragnarok.
:)
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Unread postAuthor: starman » Thu Nov 20, 2008 11:03 am

elad311 wrote:Well, i'm from israel, and yes, i asked for cement in every store...
and i couldn't even found a good PVC, every pvc (but not threaded) is a
'hot water PVC' and it's very thin.


It sounds like PVC isn't supported very well there. Maybe it would be easier for you to go to copper or iron pipe. That's the route many of our Euro friends go for the same reason.
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Unread postAuthor: elad311 » Thu Nov 20, 2008 11:22 am

starman wrote:
elad311 wrote:Well, i'm from israel, and yes, i asked for cement in every store...
and i couldn't even found a good PVC, every pvc (but not threaded) is a
'hot water PVC' and it's very thin.


It sounds like PVC isn't supported very well there. Maybe it would be easier for you to go to copper or iron pipe. That's the route many of our Euro friends go for the same reason.


Yea, but it's my first gun, and it will be very expensive if i'll use iron,
and iron is very very expensive when the diameter is more than 1"..
i just want a basic gun.
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Unread postAuthor: POLAND_SPUD » Thu Nov 20, 2008 1:14 pm

i hope you are fully aware that you can build a very powefull gun with 1/2" or 3/4" iron fittings.... size does matter but not when you up the pressure....
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Unread postAuthor: elad311 » Fri Nov 21, 2008 5:41 am

POLAND_SPUD wrote:i hope you are fully aware that you can build a very powefull gun with 1/2" or 3/4" iron fittings.... size does matter but not when you up the pressure....


yea, I know..
but i don't want a spud gun that shoots very small things, as my
first.
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Unread postAuthor: TurboSuper » Fri Nov 21, 2008 6:53 am

Looks like a solid plan to me, just seal up those threads and it'll work fine.
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Unread postAuthor: psycix » Sat Nov 22, 2008 12:39 pm

elad311 wrote:but i don't want a spud gun that shoots very small things, as my
first.

High pressure, low caliber is better then high cal. low pressure in some way.
You basically have the same kinetic energy, but its in a lower sectional area which means that you will probably achieve great distances and good penetration characteristics.
Also it comes in a more portable package. :D
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