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epic fail - 850 psi is nothing to joke with

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epic fail - 850 psi is nothing to joke with

Unread postAuthor: jackssmirkingrevenge » Thu Oct 15, 2009 10:33 am

So there I was, trying out my latest HPA BBMG idea, when BANG!

The thing basically flew to pieces due to an overpressure in the chamber. I was asking for it, there was too much unsupported epoxy so this sort of failure was to be expected, but your ingenious scribe decided to proceed anyway. Thankfully none of the flying debris hit me, it could have been much worse.

These are the bits I managed to recover, there's about 40% of it missing and I gave up looking after half an hour :?
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Unread postAuthor: spudtyrrant » Thu Oct 15, 2009 10:42 am

here's your sign..... :lol:
good thing none of the debris hit you it could have been much worse.

remember kids you always have to support your epoxy bbmg when putting 850psi through it or it may catastrophically fail :wink:
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Unread postAuthor: MRR » Thu Oct 15, 2009 11:26 am

Glad to hear that you are unharmed :shock: .

Did you ever think of glueing in some carbon fibre? It can resist massive tractive forces and in case of a failure there wouldn't be any/much shrapnels.

Rest in peace little feller. You are in a better place now. :crybaby: :angel10:
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Re: epic fail - 850 psi is nothing to joke with

Unread postAuthor: boyntonstu » Thu Oct 15, 2009 11:49 am

jackssmirkingrevenge wrote:So there I was, trying out my latest HPA BBMG idea, when BANG!

The thing basically flew to pieces due to an overpressure in the chamber. I was asking for it, there was too much unsupported epoxy so this sort of failure was to be expected, but your ingenious scribe decided to proceed anyway. Thankfully none of the flying debris hit me, it could have been much worse.

These are the bits I managed to recover, there's about 40% of it missing and I gave up looking after half an hour :?


Whew!

Where were you?

Where was the gun?

Did anything hit you?

BoyntonStu
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Unread postAuthor: POLAND_SPUD » Thu Oct 15, 2009 12:20 pm

plizzz tell me you filmed it in slow motion... :wink:
now I am happy that my experiment with resins failed before I could pressurise it
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Unread postAuthor: psycix » Thu Oct 15, 2009 12:40 pm

Ouch... it seems epoxy isn't as strong as you thought...
Did you record any of that? (Or were you out of batteries...)

At least you took it to the limit.
But... did the prototype work (for half a second)?
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Unread postAuthor: Brian the brain » Thu Oct 15, 2009 3:58 pm

You could use METAL!
At least for the body..

Now you'll be like me when you're pressurising something...

:?
Ask Psycix...He's seen me lean away a couple of times...

Oh I forgot to add:

YOU FREAKING IDIOT!

We can't afford to loose you!! :roll:
Care to share this on eurospudguns?? ( new adress btw)
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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: Moonbogg » Thu Oct 15, 2009 4:28 pm

Double yew tee eff mate? Glad you're alright and doubly glad we didn't learn of this on CNN.
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Unread postAuthor: Brian the brain » Thu Oct 15, 2009 4:33 pm

Pff..I took 79 bar to the face..
Stop complaining.. 8)

No I'm kidding...don't ever combine epoxy and those kinda pressures..
Or you need to encase it in a piece of metal pipe and fill it up completely..

You might wanna reconsider your trust in the strenght of epoxy now..
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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: POLAND_SPUD » Thu Oct 15, 2009 5:30 pm

I wouldn't feel safe with iron fittings at 850 psi.. so yeah it was a bit dumb
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Unread postAuthor: jackssmirkingrevenge » Thu Oct 15, 2009 9:49 pm

Sadly I have no footage of the event (and let's face it, if I did it would just have sounded like a massive Laz0r!). The breech was attached to my pressure washer/paintball tank setup and thankfully I was pointing it well away from me, the shrapnel mostly spread out in a arc ahead of me, except for the stainless steel chamber which judging by the dent in the ceiling shot straight up, but I still can't find it :-/

you need to encase it in a piece of metal pipe and fill it up completely..


That was my mistake, the epoxy is strong enough (looks at all my other HPA projects that didn't blow up ;) ) but it needs to be supported, in this case I had an unsupported area that was literally pulled apart by the pressure. This is why it took me so long to invest in a paintball tank, I knew I'd do something stupid sooner or later :roll:

In a nutshell, remember kids, if you're using unrated construction at silly pressures, you're doing so at your own risk.
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Unread postAuthor: Ragnarok » Thu Oct 15, 2009 10:40 pm

I'm note sure how epic that fail really was. Try comparing to this one:

[youtube]http://www.youtube.com/watch?v=031gj9_3T8c[/youtube]

On a more serious note, glad to hear you survived. It always seems that it takes a reminder of things going wrong around here once in a while to keep people thinking safe.
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Does that thing kinda look like a big cat to you?
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Unread postAuthor: hi » Thu Oct 15, 2009 11:17 pm

well there's your problem...
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Unread postAuthor: jackssmirkingrevenge » Fri Oct 16, 2009 12:15 am

Ragnarok wrote:On a more serious note, glad to hear you survived. It always seems that it takes a reminder of things going wrong around here once in a while to keep people thinking safe.


I don't think it would have killed me, I wasn't exactly pulling shrapnel out of the furniture... or maybe that's where the parts I can't find ended up :roll:

Agreed though, these incidents are a poignant reminder of the forces which we play with and how safety is of paramount importance.
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Unread postAuthor: Gippeto » Fri Oct 16, 2009 12:21 am

Tsk, Tsk, Tsk.

[youtube]http://www.youtube.com/watch?v=i308sX3C3PA[/youtube]


Glad you're in one piece Jack.
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