Author Topic: This Is What Can Happen..... (Read 144484 times - 1 votes)
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Bwalton · « **on:** September 12, 2015, 10:27:01 PM »

ALWAYS BE SAFE WHEN MODIFYING OR WORKING ON AN PCP AIR RIFLE..........He is very lucky to be alive!


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hpmr2400 · « **Reply #1 on:** September 12, 2015, 10:33:15 PM »

Wow! That is scary.

Rattus58 · « **Reply #2 on:** September 12, 2015, 11:02:03 PM »

Quote from: Bwalton on September 12, 2015, 10:27:01 PM

ALWAYS BE SAFE WHEN MODIFYING OR WORKING ON AN PCP AIR RIFLE..........He is very lucky to be alive!

Ouch.... yes.... well for one... I don't know what a HI-Pack.. hypac, hypack, or whatever he was talking about is... but though I know little about airguns, I do know a little about pressure and they don't fill scuba/scba without a "bombshield" and or allow compressed gasses in aircraft for a reason... so in a matter of roughly three weeks we see two catastrophic failures of airguns.

Those of you who know your guns, as I hope to know mine, inspect them frequently and I think that is a great practice. You body lies to you, (those who have suffered heart attacks know this) and your equipment can lie to you as well. If you can, I'm convinced that whatever the right period is, annually or 6 months or so... the experts will have to weigh in, but scuba tanks have to be visually inspected and given a hydrostatic test every 3 or 5 years and some tanks have a service life of a given number of years.. 15 commonly.... We don't hydrostatically test our airguns yet we are subjecting them to identical pressures. Checking for weakness seems to me to be a good idea.

Much Aloha,

dcorvino · « **Reply #3 on:** September 12, 2015, 11:04:38 PM »

Wow
Glad the guy is going to be ok.
That was scary

Dave

SpiralGroove · « **Reply #4 on:** September 12, 2015, 11:06:21 PM »

Hey Baxter,
That is more than scary

The nasty reality of working with a HPA/PCP Bomb

Boy, do I need to be careful ................. I wish your friend a speedy recovery. This could have been so much worse.
Kirk

chuckinohio · « **Reply #5 on:** September 12, 2015, 11:24:12 PM »

.

I'm glad to hear that PoBoy is going to be Ok and that no one else was hurt, but that is a for real sobering experience.

I was kinda second guessing myself for degassing when I would tinker about with a rifle, thinking that I was wasting air, but I'm now firmly convinced that I don't want a wound like that..........

pllagunos · « **Reply #6 on:** September 12, 2015, 11:36:32 PM »

That is very scaryyyy, does someone knows if PCP air tubes need a hydro test every now and then (5 years?) Also does a scba tank needs to be visually inspected every 6 months or that is just for scuba tanks?

sixshootertexan · « **Reply #7 on:** September 12, 2015, 11:47:53 PM »

That is an eye opener. But I'm confused. How did the Hipac breaking in half send the valve flying out the front of the tube?

nervoustrigger · « **Reply #8 on:** September 12, 2015, 11:52:58 PM »

Ugh, that makes me weak.

I've never built a Hi-pac conversion but I've been into an air rifle or two and I'm just not seeing the correlation between the tube threads failing and the valve being ejected.

My guess is the valve was not sufficiently retained. Is that what others are getting from this?

degorovi · « **Reply #9 on:** September 12, 2015, 11:53:42 PM »

That was a major wake up call for me. I just bought my first pcp rifle a few months ago. I'm glad that he is ok despite that serious wound.

HunterOne · « **Reply #10 on:** September 13, 2015, 12:29:43 AM »

A definite eye opener. As a Healthcare Professional, I can say that if this would have hit is iliac artery, it would have been curtains in less than 2.5 minutes. I am really happy that he is okay. Wasn't his time.

HunterOne

SpiralGroove · « **Reply #11 on:** September 13, 2015, 12:38:17 AM »

Yeah Ricky & Jason,
In every gun that I have worked on, the valve is retained by a screw or pin - right?, it has to be. ................ those missing 4 minutes ---------------------- at least not 17 min

. I degas my guns too, before surgery, except for the time I made a HPA bomb by putting the regulator backwards

So I know, things can happen especially when you're tired. As the morning Sergeant on Hill Street Blues said "Be careful out there".

No matter what is said, I think Baxter's friend handled the PAIN of that situation extremely well. My God - how many people get shot with a flat surfaced 60 cal. slug and go on camera with it sticking out the other end.

Big Wake Up Call/Alert !!!

Bwalton · « **Reply #12 on:** September 13, 2015, 01:01:18 AM »

I do not know the guys personally, I just subscribed to the channel

Gertrude · « **Reply #13 on:** September 13, 2015, 01:14:17 AM »

That is incredibly scary !

so can we figure out,... did the Hi-Pac explode first,.... and then send the valve into flight ?
or
did the valve retaining screws shear first ?

Can we determine exactally what structural failure happened first to set this event in motion ?

SpiralGroove · « **Reply #14 on:** September 13, 2015, 01:14:30 AM »

Oops Baxter->

My Bad

Kirk

Rob112o · « **Reply #15 on:** September 13, 2015, 01:15:16 AM »

I do know, I'll stick to being a pumper a little longer.

Rob112o · « **Reply #16 on:** September 13, 2015, 01:26:00 AM »

Quote from: tri-5-ron on September 13, 2015, 01:14:17 AM

That is incredibly scary !

so can we figure out,... did the Hi-Pac explode first,.... and then send the valve into flight ?
or
did the valve retaining screws shear first ?

Can we determine exactally what structural failure happened first to set this event in motion ?

Ok by looking at the Crosman custom tube, I'm not sure if it's needed with Hipac, I don't notice holes for additional retaining screws for the valve. Now this is something highly recommended when you go HPA, right?

rsterne · « **Reply #17 on:** September 13, 2015, 01:30:25 AM »

First of all, I'm glad that the guy wasn't killed, or injured more seriously than he was.... That could have been a fatal wound if it was over just a little bit.... WOW !!!

Now, let's analyze some of the things in the video.... There appear to have been (at least) TWO separate failures here....

1. They disassembled the back of the gun, removing the rear plug and the hammer.... The threaded end of the HiPac was still in the front of the tube.... Therefore, the Disco valve MUST have come out the back of the tube.... Why?.... See #2....

2. The tube does NOT have any side holes in it for the side screws in the Disco Valve.... Therefore, we can assume that only a single screw was used in the bottom.... They said that the gun let go when they were taking off the stock.... The stock screw sits in the slot in the Disco valve just behind the O-rings.... My guess is that the stock screw was taking part of the load, and when they undid it, all the load went on the bottom valve screw.... and BOOM, out the back of the gun it went, and through his leg....

3. I'm not a fan of HiPacs, but HOW in heaven's name do you use one with a Disco valve?.... They are designed to work with a stock 22XX valve, and seal against the valve, so that the tube is not under any pressure.... Did these guys cobble up some kind of seal between the HiPac and the Disco valve?.... or did they just use the HiPac to pressurize the tube (something it was never designed to do), and seal the Disco valve into the tube with O-rings?.... If they had a seal of some kind between the front of the Disco valve and the HiPac, and the tube wasn't under pressure.... then when the valve moved back a fraction, BANG the tube was pressurized, and that stressed the HiPac in ways it was never designed for....

4. Despite #3, how in heaven's name did the HiPac fracture at the threads, leaving the threads in the tube, and the HiPac imbedded in the ceiling?.... Is this a completely separate failure from the valve shooting out the back?....

Too many questions, and not enough answers.... However, I would say that whoever built that gun, using a Disco valve with apparently only one screw, must bear some of the blame.... If they had the valve sealed to the HiPac, the way it was intended to be, then did they have O-rings on the valve, so that it sealed to the tube?.... If they didn't, and the HiPac was only pressurizing the valve and not the tube.... then how did it develop enough pressure to shear the valve screw and fire the valve into his leg?....

Bob

miksatx · « **Reply #18 on:** September 13, 2015, 01:33:34 AM »

To begin with the hipac isn't designed to be used with a disco valve period. Also disco valves are held in place with 3 8-32 screws in the valve. Was the main tube drilled for the other screws? Kind looks like he added the extensions to the tube with out the lower section that seats in the face of the co2 valve. not using a product the way it was designed to be used not a real good idea. Glad he's ok though. Not going to keep me from using my hipac.

sixshootertexan · « **Reply #19 on:** September 13, 2015, 01:49:37 AM »

I didn't catch the disco valve but i did notice the sheared screw in the valve. They said the valve went into his leg with the front of the valve, meaning it came out the front of the tube not the back end. If I understand right the Hipac has a valve in it that is opened when the valve stem is hit with the hammer and pushing the needle end that pierces the co2 cartridge. If the Hipac broke at the threads would that have taking the spring keeping the valve shut out? If so then the valve would have seen pressures that would have sheared the 1 screw holding it in and sending it out the back of the tube. Oh and they said they had 4 of them stacked up, what did that mean.

This Is What Can Happen.....

Author Topic: This Is What Can Happen..... (Read 144484 times - 1 votes) )

Author Topic: This Is What Can Happen..... (Read 144484 times - 1 votes)
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