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Microtek
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It would be better if you did sensitivity tests on molten ETN in even smaller amounts (less than 1 g). So melt such a small amount and hit it in a
measurable manner and compare to solid ETN and PETN. Then do the vacuum treated molten ETN to see if there is any significant difference. Remember to
do at LEAST five repetitions.
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PLSHY
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I found that all current etn-related accidents are caused by temperature, not mechanical impact. This means that if no heat source is used during the
pouring process, most accidents can be avoided! Finally, I decided to test the impact sensitivity of melted etn and its safety under vacuum. If the
melted etn with bubbles removed can achieve a lower impact sensitivity than PVA-LA, I will use 1:1 etn/petn in water The shaped charge warhead is
cast below, divided into 200 grams and 100 grams. I believe this will achieve good results. It is expected to launch this warhead in December, and
relevant information will be posted on the shaped charge thread at that time.
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MineMan
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This is dumb.
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MineMan
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Accident in the making. Accept
Things
As they are
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PLSHY
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Oh my god, isn't that enough? Is it also foolish to add proof of theory to reality testing?
If you want to refute me, you should use theory to prove why my theory is wrong, or give a few examples of accidental melting etn caused by mechanical
impact! Instead of just saying "You're so stupid" and walking away, it makes me so angry! I suspect you didn't watch the entire discussion and just
saw the outcome: "I'm going to use a lot of melt etn"
[Edited on 5-10-2023 by PLSHY]
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Microtek
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In engineering courses on risk assessment and management you learn that the burden of proof must be the other way round. You want to do an activity
such as melt casting a large amount of sensitive HE. We can identify several possible outcomes, at least one of which is catastrophic (the accidental
detonation of the HE). If we assume that this outcome is likely, we can conduct the process with adequate precautions (remote operation, large safety
distance and so on), and if the assumption turns out to be wrong, we will only have wasted the effort that went into our precautionary measures.
Conversely, if we assume that the catastrophic outcome is UNlikely, and therefore conduct the procedure without safety measures, then if the
assumption turns out to be wrong we will lose life or limb.
So, it is a question of what you risk losing. You must understand that extrapolating from observations made in a different context means that you
assume that the same mechanism apply in this context. And also that the absence of reports about mechanically induced accidents while melt casting ETN
may be explained precisely by people dying when they try it.
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UndermineBriarEverglade
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PLSHY, did you ever carry out this experiment? It seems like a bad idea to pour molten ETN, or to vibrate it. Its sensitivity is dramatically higher
when melted. For instance Lease et al. 2018 found that molten ETN could be detonated by 2.5kg dropped from 1cm, an impact of 0.25J. That was close to the low end of what
their apparatus could test.
But I have also been thinking of melting ETN in a vacuum to extract bubbles.
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PLSHY
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Thanks to the forum for reminding me, I didn't do this experiment in the end. A friend of mine did this experiment, he soaked it in hot water and then
ran away quickly. In the end, there was no accident, but the experiment failed and the melted etn leaked out. After that, we did not conduct related
experiments again, but turned to looking for more convenient, cheap and safe mixed explosives. Looking back, this was indeed dangerous and
irresponsible behavior. If anyone has ever been angered by me, I sincerely apologize to you.
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PLSHY
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We tried some other explosives, such as tmptn and dipehn. But they all failed, and we never found an excellent casting explosive like etn. tmptn turns
into a sticky paste after nitration (and is difficult to solidify). Dipehn produces holes when casting. We also tried many ways to improve their
shortcomings, but ultimately failed. The process of testing them is very interesting, if anyone wants to hear it, I can send it out
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PLSHY
Hazard to Self
Posts: 93
Registered: 30-7-2023
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We tried some other explosives, such as tmptn and dipehn. But they all failed, and we never found an excellent casting explosive like etn. tmptn turns
into a sticky paste after nitration (and is difficult to solidify). Dipehn produces holes when casting. We also tried many ways to improve their
shortcomings, but ultimately failed. The process of testing them is very interesting, if anyone wants to hear it, I can send it out
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