We live in a cancel culture and people are ready to jump on anything for any reason they can and trash it. Then once the damage is done - maybe oops, my bad.
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Leshiy 2 explodes
- Thread starter bckyrdsnpr52
- Start date
Also learned the standard for testing in this manufacturer is 1.5x operating pressure not the 3+ used in the U.S.
John
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LIQUID Is non compressible, SO A CYLINDER FILLED AND UNDER HIGH PRESSURE has near zero yield from an outside force pushing inward.
It would be STUPID .. to do the same test filled with equal Air pressure that would would allow material yield inward & likely violent failure.
IMO ..
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I'm pretty sure mine has a flat bottom, here's how much material there is. I imagine all the first shipment of the Canadian ones are like this. I'm happy with this.
(Tip represents inside corner)
(Tip represents inside corner)
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Marko,
I see your ytube videos concerning this are still up. You did cast several stones in those videos based on information you have found to be incorrect. Will you be taking those videos down? Also, do you make money on those videos?
Thanks,
Dave
I see your ytube videos concerning this are still up. You did cast several stones in those videos based on information you have found to be incorrect. Will you be taking those videos down? Also, do you make money on those videos?
Thanks,
Dave
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Not really incorrect. Stress riser is still there. Obvious design failure with serious risk with metal fatique, corrosion or exessive outside force. Only positive is that material didnt yield at normal hydrotest pressures. That dosent mean its safe pressure vessel in long run when material properties change.
May I ask what is your problem with Marko?
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May I ask what is your problem with me? I asked some simple questions to him, not you.
Btw, metal fatigue, corrosion and external forces applies across the board to any pressure vessel.
Marko admitted to testing procedures that were flawed.
Fwiw, I’m not trying to hate on Marko with that question. The opposite in fact, if I were to put out something in error, I would want to correct it. Your assumption is I have a problem with him. Assumptions have filled the majority of this thread. I like Marko just fine, that has nothing to do with the discussion here.
Dave
Btw, metal fatigue, corrosion and external forces applies across the board to any pressure vessel.
Marko admitted to testing procedures that were flawed.
Fwiw, I’m not trying to hate on Marko with that question. The opposite in fact, if I were to put out something in error, I would want to correct it. Your assumption is I have a problem with him. Assumptions have filled the majority of this thread. I like Marko just fine, that has nothing to do with the discussion here.
Dave
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It was assumed the material in question was 7075-t6, which is on the extreme end of one spectrum, when in fact the material is more similar to 2024-t3...middle ground.
The assumptions in this thread go every which way but loose
The assumptions in this thread go every which way but loose
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I store my SCBA and SCUBA tanks in a shed that gets pretty hot in the Summer Sun.
Not a single one has went BOOM. And there is a PURE Oxygen tank in there also.
Not a single one has went BOOM. And there is a PURE Oxygen tank in there also.
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Does someone have the actual metallurgical test results in hand , otherwise this is just " i think" and "my guess is " isn't it ? Not picking a fight or anything just asking is all .
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And it will keep going until it's solved.
Whats sad is it took someone like Marko to really push any progress...amazing how quickly Ed got him a new set of tubes, but its taken so long to retrieve the exploded tube and have it tested...lol, priorities I suppose.
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Ed has the damaged tube already and it's been sent off for testing. He's done the right thing by me.
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I agree, but as I said its taken quite a long time, I am not insinuating anything other than it wasn't done post-haste as getting Marko's replacements.
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Finding it interesting that the most vocals have relatively fresh new accounts.
Just speculating, as someone very valuable - in non engineering -said that earlier.
Just speculating, as someone very valuable - in non engineering -said that earlier.
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Each to their own. As a backcountry skier and motorcyclist, the PCPs are the least of my worries!
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I consider it my fault if I choose to use a potentially dangerous device not designed with adequate safety margins. Aluminum, unlike steel has a finite fatigue life even when cycled well below its yield strength. So just because it doesn't yield doesn't mean it won't fail if cycled enough times. The whole idea for the large safety margins is so for all practical uses it will never fail in common use because the number of cycles isn't likely to cause fatigue failure.
Having 2 machined versions, one with less safety margin is far from ideal. If you only fill and empty the gun once a week neither version will probably fail in your lifetime. If you fill and empty them 10,000 times a day the one with a sharp internal edge will fail first. Of course no one will fill it 10,000 per day or even in a lifetime.
Having 2 machined versions, one with less safety margin is far from ideal. If you only fill and empty the gun once a week neither version will probably fail in your lifetime. If you fill and empty them 10,000 times a day the one with a sharp internal edge will fail first. Of course no one will fill it 10,000 per day or even in a lifetime.
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If I were Leshy, I would have this gun picked up ( TODAY ) and have an engineer go over it. I would also have a NEW Leshy at his door the same way!
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