Leshiy 2 explodes

EDgun said:

We tried to destroy the tubes while testing and always fail, the maximum pressure we could achieve was 800 bar.

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When did you perform such a test? Do you test every batch you produce like that (800 bars)?

Starting from Matador R5M there were cheaper materials introduced to reduce the cost. Were there any changes like that in Leshiy 2? Maybe different alu was used, e.g. PA6 instead of PA9?

If I were Dave I would perform the analysis in my own country. There are certain institutes which can do it and they can deliver an official report with the reason of a failure.

It would not take much more than 200 bar to explode a cylinder if it somehow got oil in it. Would not take a whole lot of oil either....

so if I understand correctly the gun where anodize missing was enlarged and fitted with a oring , and this weakened cyl and pressureized a weak link the thrads and it failed , so the area of non black was polished or enlarged to fit the oring so gun was modified is this correct ?

jwrabbit123 said:

so if I understand correctly the gun where anodize missing was enlarged and fitted with a oring , and this weakened cyl and pressureized a weak link the thrads and it failed , so the area of non black was polished or enlarged to fit the oring so gun was modified is this correct ?

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Nope I dont think it was modified one bit thats how it is from factory. That o-ring on wrong position might come off from o-ring groove or be falsely placed on wrong spot and leaving real groove without one. ( I dont see how it would seal tho from outside)

It is just speculations, but I agree with slugmaster about the side bevel seems to be missing on the oposite end of the threaded area. If the inner hole of the tube was drilled flat (which it look like on the picture), and to deep, it could weaken the tube. About the O-ring, my guess it was blown back, when the air rushed over it.

So are we L2 owners sat on ticking time bombs or does something appear off with this whole thing. Are there more photos? Why just one.. show us the other side, the action as well. Then perhaps get it inspected first in the uk then send it but there’s plenty of expertise I’m sure who would welcome the chance to look at this. Just seems weird the whole post - still very worrying. What’s the betting Ed never gets these components

bunkeru2k said:

It would not take much more than 200 bar to explode a cylinder if it somehow got oil in it. Would not take a whole lot of oil either....

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Please educate me on the reasoning for this statement. I have heard some people suggest a little silicone oil is good for tank interiors. Just want to be clear on this for safety's sake, thanks!

silvershooter589 said:

Please educate me on the reasoning for this statement. I have heard some people suggest a little silicone oil is good for tank interiors. Just want to be clear on this for safety's sake, thanks!

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Petroleum based oils can combust under pressure. 100% silicone does not, AFAIK

Man... this whole thread is kinda scaring me, not gonna lie. While I am aware this is a very rare and unusual case, still, placing my cheek on the top cylinder while shooting makes me brace for impact now... I hope we will get more clarification about what happened and whether or not this can happen to anyone. I love my L2 and I'd like to trust in its sturdyness.

Airacuda said:

The issue was the treaded area was pressurized nothing else is at fault. The cross section of the tread bore is to thin for that pressure. The Inboard oring was not in place and having a outboard oring is never a good idea so i have no idea why its there at all. Because the inboard oring is missing all the pressure is being held back by the outboard oring which then in turn puts all the tank pressure on the thin threaded area. THIS IS WHY IT FAILED.

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It was just blew out of its place by the explouse.

Seeker said:

When did you perform such a test? Do you test every batch you produce like that (800 bars)?

Starting from Matador R5M there were cheaper materials introduced to reduce the cost. Were there any changes like that in Leshiy 2? Maybe different alu was used, e.g. PA6 instead of PA9?

If I were Dave I would perform the analysis in my own country. There are certain institutes which can do it and they can deliver an official report with the reason of a failure.

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I am not an idiot to test every tube up to 800 bar and then send them to the users Every batch of the material we get from the supplier we test. We test some tubes made of the every batch of the material trying to dectroy and then reject those tubes in order they have no chance to be sent to assembling.

That is a very brave statement about the cheap materials! Do you have the exact informatoin about it, the chemical analyzes and so it, or it is just "highly likely" Can you prove it or just shaking the air?

Our president Putin says "If grandmother had nuts she would be grandfather..."

EDgun said:

It was just blew out of its place by the explouse.

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If so then why did the tube fail?

EDgun said:

I am not an idiot to test every tube up to 800 bar and then send them to the users Every batch of the material we get from the supplier we test. We test some tubes made of the every batch of the material trying to dectroy and then reject those tubes in order they have no chance to be sent to assembling.

That is a very brave statement about the cheap materials! Do you have the exact informatoin about it, the chemical analyzes and so it, or it is just "highly likely" Can you prove it or just shaking the air?

Our president Putin says "If grandmother had nuts she would be grandfather..."

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Hi EdGun, I think you misunderstand their statement. They are not accusing you of using cheaper materials. They gave an example of a different manufacturer who introduced cheaper materials later down the line to save on costs, and wondered if perhaps EdGun had done the same. It's a question, not an accusation.

Also, it may not be the best time to be quoting Putin... given the current state of world affairs. No disrespect to you as a company of course!

I hope this anomaly gets clarified soon

tor47 said:

It is just speculations, but I agree with slugmaster about the side bevel seems to be missing on the oposite end of the threaded area. If the inner hole of the tube was drilled flat (which it look like on the picture), and to deep, it could weaken the tube. About the O-ring, my guess it was blown back, when the air rushed over it.

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Even if it would be drilled to deep the weakest point would be in the middle of the tube, not in the side of it. Look at this picutre. here you can see how the strenth is located on the gun while under 300 bar pressure (calculation in the program). That is the minimal strenth limit. Nevertheless that the strength is concetrated at the edge, the whole strength limit is equal to the whole tube on the full length of it. Even if we speculate that the metal will start become weaker in this point the whole strength will be delivered to the deepnest of the metal and there is a lot of additional strength (the blue area around). So, the bottom here is not stressed too much. And if the tube would blow up most likely the bottom wasn't the point where it had been started.



But if we modelate that the gun fell down on something hard and the impact was directed to the end of the butt we can see that in this case the maximum stress point would be at the bottom of the tube adn the tube will crach on it's upper part as the metall will be weaked there due to the impact, as well as the metall will be weaked at the butt around the filling port.



As I can see there is a mark at the area of the filling port. Probably that could be the mark of stretching the metal of the impact.



Anyhow I don't want to speculate on anything before I get all the parts to make the investigation. Those are just the answers to the speculations buddys on this forum We are just chatting now without any facts.

DonEnzone said:

Hi EdGun, I think you misunderstand their statement. They are not accusing you of using cheaper materials. They gave an example of a different manufacturer who introduced cheaper materials later down the line to save on costs, and wondered if perhaps EdGun had done the same. It's a question, not an accusation.

Also, it may not be the best time to be quoting Putin... given the current state of world affairs. No disrespect to you as a company of course!

I hope this anomaly gets clarified soon

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In this case I am sorry for wrong understanding the fellow, you should take into consideraton that English is not my native language and I am far away of getting all the nuances.

As for Putin -- that is just the policy and in fact the quate was just to troll people a little bit, in fact that is the well known Russian proverb, like yours' "If ifs and ands were pots and pans!"

Airacuda said:

If so then why did the tube fail?

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We will find it out after getting the rest of the parts.

That Leshiy tube looks awful alot of different than in your modeling....

So
Many
Keyboard
Detectives

SlugmasterABC said:

That Leshiy tube looks awful alot of different than in your modeling....

View attachment 333068

View attachment 333069

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The apparent discrepency you are pointing out, it's unclear if that's the original milling or if that's a mechanical tear from the explosion, the cutting done to present the picture, or perhaps stems from some other issue entirely.

There's a lot of issues in those photos. Difficult to tell what is cause, and what is consequence.

I still believe the oring was not in the gland and got trapped by the heavy beveling of the air tube up against the body of the gun resulting in the separating of the thread cross section. Either way thank God no one was hurt. Ed will figure it out he knows what he's doing he is not new to this and has a good reputation and builds very good guns.