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

[jhalek90]

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.

[youtube][/youtube]

[youtube][/youtube]

[DEATHSTAR]

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.

[sharpshooter11000]

That's one massive chamber and valve, nice

[POLAND_SPUD]

lol what can I say... I love it

[warhead052]

I remember seeing this, glad you brought it back! Nice job, I may make one my self some day.

[Technician1002]

It is possible to use thin wall 1.5 inch PVC inside a 2 inch pipe for golfballs. Works very well.

[jhalek90]

lol what can I say... I love it

of course you do, its piloted by a 3 way valve. (not in the pictures.)



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

[MrCrowley]

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

[Gun Freak]

Why on earth would he want to do that

[jhalek90]

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...

[Crna Legija]

that is mad what pressure was the vids shots at?

[Technician1002]

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

1.9 inch porting T valve and 1,000 cu in
vs 2 inch coaxial and 700 cu in.

[DEATHSTAR]

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

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???
8)

[Technician1002]

Sure, but you are limited to using my compressor..

[jhalek90]

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

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

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.