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3/4" Copper pneumatic

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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3/4" Copper pneumatic

Unread postAuthor: boyntonstu » Wed Sep 23, 2009 4:44 pm

[youtube]http://www.youtube.com/watch?v=yMtvC_0D1Ls[/youtube]

I accidentally arrived at the chamber to the side position as I was tightening the fittings.

I would not have thought of doing it this way.

Since the gun is so light an the balance point almost perfect, I find it very comfortable to hold it very steady as shown.

It has a small leak that I believe comes through the washer screw and not through the seal itself.

Just my guess.

BoyntonStu
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Last edited by boyntonstu on Thu Sep 24, 2009 9:22 am, edited 3 times in total.
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Unread postAuthor: Brian the brain » Wed Sep 23, 2009 4:53 pm

Sure sounds like a winner!
The Stengun reservoir looks like fun.Great that it also helps balancing.
Let's see some damage.. :D

Wouldn't it be easier to rotate the ballvalve 180 degrees and get a trigger to pull, in stead of push?

Oh ...next time you could put the gauge on the chamber to achieve smaller pilot volume for better performance...

Great first build!
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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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Unread postAuthor: boyntonstu » Wed Sep 23, 2009 5:04 pm

Brian the brain wrote:Sure sounds like a winner!
The Stengun reservoir looks like fun.Great that it also helps balancing.
Let's see some damage.. :D

Wouldn't it be easier to rotate the ballvalve 180 degrees and get a trigger to pull, in stead of push?

Oh ...next time you could put the gauge on the chamber to achieve smaller pilot volume for better performance...

Great first build!


Thanks,

The piston has a rear bumper/seal which may effectively reduce the pilot volume when it is pushed back and seals against the adapter.

I find that operating the ball valve this way is like squeezing a caulk gun.

It is very effective and smooth.

Squeezing my palm on the ball valve towards the fixed gauge position does not feel much different than pulling a trigger on a .45 automatic.


Have you experienced leaks through the screw threads?

BoyntonStu
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