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Author: Subject: Det Cap Strategies
Laboratory of Liptakov
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[*] posted on 17-4-2019 at 01:54


For measurement of brisance of any amateur detonator, is steel plate base condition. Usually 1 - 2 mm of thickness. It give clear result. Wood cavity is nonsense.



Safety explosive Alfred Nobel 1867. Safety ecologic detonator Dr. Liptakov 2015.
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FeedMe94
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[*] posted on 17-4-2019 at 05:56


Quote: Originally posted by Laboratory of Liptakov  
For measurement of brisance of any amateur detonator, is steel plate base condition. Usually 1 - 2 mm of thickness. It give clear result. Wood cavity is nonsense.


You are right i just didnt have something to test on. I just tested 500mg ETN and 500mg ETN + 150mg SADS on 2mm steel. Non of them penetrated it.
1) ETN wasnt pressed
2) The centrifuge plastic tube have round bottom so it didnt make full contact on metal

I will get 1mm steel plate and also i will melt the bottom of the plastic tube to make it flat and i will repeat the test
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Laboratory of Liptakov
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[*] posted on 17-4-2019 at 11:17
Lead block measurement


Much better is Lead block. You can use repeately. All energy is discharged into material, without loss in some hole. In metal plate is usually hole. In Lead block not. Crater give an clear result about all energy from destruction device. Almost entire energy is catched in lead. And is it pretty nice. As some crater on the Moon.

lead.JPG - 477kB

For example, at same conditions (500 mg output segment) has CHP smaller brizancion than ETN. But CHP is not molecular explosive. Only salt + Fuel. CHP not require some next primary mixture for reliable start. Works as primary and secondary as 2 in 1.


CHP lead.JPG - 516kB

[Edited on 17-4-2019 by Laboratory of Liptakov]




Safety explosive Alfred Nobel 1867. Safety ecologic detonator Dr. Liptakov 2015.
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Laboratory of Liptakov
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[*] posted on 23-4-2019 at 09:20


Next serie of tests show different properties of tested materials and his mixtures. Weak is mixture TACP/ glycine from recrystall process.
Tests on the lead block show an clear difference. If used steel plate, is difficulty find a clear difference between samples. Highest energy has of course pure ETN (above) . Follows....... ETN/CHP......CHP....... CGP. Values in mm/grams.....:cool:...LL

test impact.JPG - 501kB




Safety explosive Alfred Nobel 1867. Safety ecologic detonator Dr. Liptakov 2015.
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[*] posted on 23-4-2019 at 22:42


Very cool! Would be curious about PETN and nano Al. Which can be set off by a low powered laser (1watt) no primary needed.
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[*] posted on 23-4-2019 at 23:10


Quote: Originally posted by MineMan  
Very cool! Would be curious about PETN and nano Al. Which can be set off by a low powered laser (1watt) no primary needed.


Wow , i didn't know that. I have PENT and atomized Al. I will try it soon
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[*] posted on 23-4-2019 at 23:43


Quote: Originally posted by FeedMe94  
Quote: Originally posted by MineMan  
Very cool! Would be curious about PETN and nano Al. Which can be set off by a low powered laser (1watt) no primary needed.


Wow , i didn't know that. I have PENT and atomized Al. I will try it soon


Yes. It’s a big deal for advancement of laser detonators. Let us know your results. 5% Al is the prescription. I believe the paper was in EPP a few months ago...

I don’t know optics well enough to focus a laser after fiber optic cable though...

A single mode diode can focus the smallest. Best bet would be the 900mw 405nm singlemode didoe.
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Laboratory of Liptakov
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[*] posted on 24-4-2019 at 01:10


Optical cable inserted instead fuse? Maybe is time buy some laser......:D...LL



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[*] posted on 24-4-2019 at 12:02


Quote: Originally posted by Laboratory of Liptakov  
Optical cable inserted instead fuse? Maybe is time buy some laser......:D...LL


Correct LL. Fiber optic cable insstead of fuse or wire!
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[*] posted on 24-4-2019 at 12:09


Quote: Originally posted by MineMan  
Quote: Originally posted by Laboratory of Liptakov  
Optical cable inserted instead fuse? Maybe is time buy some laser......:D...LL


Correct LL. Fiber optic cable insstead of fuse or wire!


I wonder if a beam expander (which actually help focus to a small spot at a distance) and a higher power laser would work at moderate distances without the FO cable? I have a 1 watt blue laser that I have used many times to set off small charges of AP from about 8 feet.
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[*] posted on 24-4-2019 at 20:36


Quote: Originally posted by twelti  
Quote: Originally posted by MineMan  
Quote: Originally posted by Laboratory of Liptakov  
Optical cable inserted instead fuse? Maybe is time buy some laser......:D...LL


Correct LL. Fiber optic cable insstead of fuse or wire!


I wonder if a beam expander (which actually help focus to a small spot at a distance) and a higher power laser would work at moderate distances without the FO cable? I have a 1 watt blue laser that I have used many times to set off small charges of AP from about 8 feet.


My guess is for detonation is must be very small. Let me look up the paper.
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[*] posted on 30-11-2019 at 13:32


Hello,

This is a question for XeonTheMGPony, have you tried using commercial primers for caps instead of re-inventing the wheel? Don't get me wrong, you have done a great job, but I wonder if a normal primer could be adapted to be used electrically for your caps?
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biggrin.gif posted on 30-11-2019 at 14:00
Why not reinvent the wheel?


My det caps are both safe to load and have zero shrapnel risk. Yes, I needed to reinvent the wheel, but that's the fun of it.

https://drive.google.com/open?id=1d0D9WVLlj-MpjEukyICJDtty6C...

[Edited on 30-11-2019 by wessonsmith]
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[*] posted on 1-12-2019 at 19:12


Quote: Originally posted by deadpool  
Hello,

This is a question for XeonTheMGPony, have you tried using commercial primers for caps instead of re-inventing the wheel? Don't get me wrong, you have done a great job, but I wonder if a normal primer could be adapted to be used electrically for your caps?


what do you mean by primer? Atm I use all industry standard systems.

I just make them my self as due to the idiocy of our laws here.

Mine are perfectly safe as well, you have to be rather spectacularly stupid to injure your self with one, IE safety is in the person not the substance

[Edited on 2-12-2019 by XeonTheMGPony]
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orbitalchemtech
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[*] posted on 15-10-2020 at 18:50


Quote: Originally posted by XeonTheMGPony  
Why re-invent the wheel, industry standard practices, over 60,000,000 million made a year with very few if any defective units or detonations unintended.

Do research, pick a form factor, make some basic tools and be don with it.

I use two standard of tubing, 7mm od 6.5mm ID or 6mm Od, and 5.5 ID

I get high quality nails, then lath them down to the size of the tube then a hair more to allow clearance and that has a paper spacer to ensure the metal never makes contact to the tube.

Base charge is pressed in, primary charge is pressed into a solid paper tube that firmly fits in the tube, so on.

Very safe, very reliable, very simple, and each stage can be don on mass.

What gets you in danger is changing things up all the time, not having a solid system in place, and good job specific tooling, it doesn't need to be fancy or high tech, it just need be made for the task at hand


A pneumatic cylinder works well for a press and can be activated remotely so there is no danger from pressing operations and with added blast shields if an accident occurs shrapnel is directed in a safe direction. Tooling is easily made from some wood and dowels and pressure can be adjusted with regulator to get desired force I think pressing anything by hand is risky business


20201015_074330.jpg - 3.3MB20201015_074346.jpg - 3.1MB
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[*] posted on 18-11-2020 at 07:14


I'm new on sm but something I've noticed that isn't common here but is the standard in mds demolition is the use of dual priming. There is basically no scenario where a charge would not be primed with dual caps for a blast. Even on command dets and time delay, engineers always use two caps for redundancy. If one cap fails the second fire succeeds assuming known components are being used. I should mention that the use of dual caps can be tricky in situations with Shocktube. Ive seen a dual prime using a Shocktube primary detonator cap and a fused secondary cap. If the time fuze is lit and the shocktube isn't detonated before the time fuze runs out, the detonation will travel backwards up the shocktube and detonate the primer initiator in the wrong direction, injuring the user. I dont think ppl here are making shock tube but I thought it was worth mentioning as I saw it happen in demolition and it really confused everyone when it occured.
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