2'' porting piston cannon. video. Built fot HPA

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jhalek90
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Thu Apr 05, 2012 9:46 am

This is a 2'' porting, (1.9'' actually) metal, piston valve, with a 1000 cubic inch scuba tank as the chamber. Piloted by a 1/4'' QEV.

For now, i am using a 2'' barrel, with golf balls... as you can see in the photo below, they are a terrible fit. Soon i will be making some 2'' slugs, and trying sabots with the golf balls.

Also, if you notice, in one of the photos, there is a tennis ball in the barrel port... the port has 2'' female threads, and the ball fits right in. :-)

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Last edited by jhalek90 on Mon Apr 09, 2012 1:13 pm, edited 1 time in total.
jackssmirkingrevenge wrote:I wonder... if you put flammable vapours inside a lady... could you get her to diesel?
POLAND_SPUD wrote:Anything is possible with the proper 3-way valve.
DEATHSTAR
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Thu Apr 05, 2012 10:20 am

awesome!
Looks like a very large chamber for "C:B ratio" , but it works.

Maybe you could just sleeve the barrel with rolled metal, like that roofing flash stuff(?) (still would have a small gap, but perhaps it could be rolled in a way that it will rifle the ball(?))

What type of plastic is the piston?
Thanks.
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sharpshooter11000
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Thu Apr 05, 2012 10:37 am

That's one massive chamber and valve, nice :wink:
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POLAND_SPUD
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Thu Apr 05, 2012 10:55 am

lol what can I say... I love it
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warhead052
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Thu Apr 05, 2012 11:16 am

I remember seeing this, glad you brought it back! Nice job, I may make one my self some day.
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Technician1002
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Thu Apr 05, 2012 11:22 am

It is possible to use thin wall 1.5 inch PVC inside a 2 inch pipe for golfballs. Works very well.
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jhalek90
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Thu Apr 05, 2012 12:33 pm

POLAND_SPUD wrote:lol what can I say... I love it
of course you do, its piloted by a 3 way valve. (not in the pictures.)
:-P


Also, i will be getting a new barrel tomorrow, 2''x10' (might cut it down)
and shooting 2'' slugs :-) i really have no interest in shooting golf balls, it was just the first thing i had laying around.


Glad some of you remember this from last fall :-)

The old piston was HDPE, and has been changed since the photos, next time i have it apart, ill take a pic of the new piston.

the old piston used a 1/4'' threaded rod, which turned into a pretzel after the first shot.... the new piston is a bolt/rubber hybrid... and is on a 1/2'' threaded rod :-)
jackssmirkingrevenge wrote:I wonder... if you put flammable vapours inside a lady... could you get her to diesel?
POLAND_SPUD wrote:Anything is possible with the proper 3-way valve.
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MrCrowley
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Thu Apr 05, 2012 3:54 pm

Nice job! Good work on getting 1.9" porting out of a 2" tee.

You know, it wouldn't take much modification to turn it in to a piston hybrid :wink:
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Thu Apr 05, 2012 4:08 pm

Why on earth would he want to do that :D
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jhalek90
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Thu Apr 05, 2012 8:47 pm

I have to laugh (evil laugh) at the idea of a 1000 cubic inch 1.9" porting hybrid... I may do ot in the future... I might be able to get another tank like this one...

This one already kicks to much to use the shoulder strap i made. The idea was to fire it from the hip... But it knocks me over at 150psi...
jackssmirkingrevenge wrote:I wonder... if you put flammable vapours inside a lady... could you get her to diesel?
POLAND_SPUD wrote:Anything is possible with the proper 3-way valve.
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Crna Legija
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Thu Apr 05, 2012 8:49 pm

that is mad what pressure was the vids shots at?
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Technician1002
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Thu Apr 05, 2012 10:52 pm

I think we need to get together for a shoot off.. :D

1.9 inch porting T valve and 1,000 cu in
vs 2 inch coaxial and 700 cu in.
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Fri Apr 06, 2012 8:09 am

Technician1002 wrote:I think we need to get together for a shoot off.. :D

1.9 inch porting T valve and 1,000 cu in
vs 2 inch coaxial and 700 cu in.
Can I bring a 3000 psi HPA tank -into pressure washer handle -into burst-disc.
w/ about 2" barrel , and only about a small fraction of that type volume??? :wink:
:P 8)
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Technician1002
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Fri Apr 06, 2012 10:24 am

Sure, but you are limited to using my compressor.. :twisted:
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jhalek90
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Fri Apr 06, 2012 10:38 am

Technician1002 wrote:I think we need to get together for a shoot off.. :D

1.9 inch porting T valve and 1,000 cu in
vs 2 inch coaxial and 700 cu in.
8) What state are you located in? Im in northern Michigan

Crna Legija wrote:that is mad what pressure was the vids shots at?
About 100 psi in the video. I have taken one shot at 150psi, and want to shoot it at much higher, but have no way to fill a 1000 cubic inch tank... my friggy died trying to fill this thing. :x
jackssmirkingrevenge wrote:I wonder... if you put flammable vapours inside a lady... could you get her to diesel?
POLAND_SPUD wrote:Anything is possible with the proper 3-way valve.
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