My First Pneumatic

[squeaks]

Here's my first gun in progress. I researched for a while and finally decided on two things. First, I decided to make a chamber sealing piston, and second, I decided to go big. It has 2 4'x4" chambers and a 12'x2" barrel. I'm welcome to any sugestions since most of it is still slip fitted while I'm working on the valve assembly.

Thanks and hope the pic works.

[rna_duelers]

SWEET gun.But mayeb the barrel could go for some suport from the chamber.Whats the C:B ratios?It looks like the barrel might be to long.But nice cannon,very nice.

[MrCrowley]

wow frekin nice gun, i like the unique design/layout of the gun.hope the valve works for you,what parts are slip-fitted?i can see most parts are already glued and primed.

[squeaks]

I haven't glued on the chambers or the barrel yet and I'm planning on making a stand for the gun. I used the GGDT and it said the barrel should be plenty fine how long it is(hopefully).

[PVC Arsenal 17]

really nice. How exactly does a chamber sealing valve work? I'm only familiar with the old barrel sealing valves.

[rna_duelers]

Come on people!This gun is awesome for a first timer where is the praise??What did the GGDT read out at?Whats the max velocity?Again nice gun and PVC Arsenel give the spud wiki a try you might be amaised at what you find.

[squeaks]

The GGDT was giveing varying velocities depending on the projectile. Anywhere from 750 to 350 fps. The farthest it was simulating was about half a mile.

[Extrusion]

Half a mile, 750fps, damn nice first pneumatic my first was a coke bottle lol.

[ProfessorAmadeus]

Wow! This is huge! I am quite amazed by how good this is. My first pnuematic was a simple spinkler valve and sucked. Does the pilot volume have to be so big or is that mostly a piston?

[ProfessorAmadeus]

Wow! This is huge! I am quite amazed by how good this is. My first pnuematic was a simple spinkler valve and sucked. Does the pilot volume have to be that big or is that mostly a piston?

[squeaks]

You're right, it's mostly going to be piston.

[Benny]

Jesus, pvc aresnal, reduce the size of ur pic in ur sig.

Thats a bloody nice first cannon, you should seriously put some barrel support on it though.

[rna_duelers]

I think thats the job of that hightech box Its the barrel support.Cant wait to see some damage pics from this gun,i hope there will be some.

[PVC Arsenal 17]

I search wiki on chamber sealing valves. no luck.

[squeaks]

It's the same principle but instead of the piston sealing off the barrel, it seals off the chamber. Then you have a small equilization hole in the piston and a 1-way valve to leak air into the chamber.