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Author: Subject: Unconventional Shaped Charges
Laboratory of Liptakov
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[*] posted on 17-1-2019 at 08:20


The bucket looks like he go through a war zone. Good Mad attempts......:cool:



Safety explosive Alfred Nobel 1867. Safety ecologic detonator Dr. Liptakov 2015.
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markx
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[*] posted on 21-1-2019 at 03:57


Working on refining the liner geometry a "bit".....


Indicating the support to be dead centered, the rough liner after pressing (0,3mm thickness), the adhesive for fixing the liner to support:
IMG_3083.JPG - 91kB IMG_3084.JPG - 95kB IMG_3085.JPG - 103kB




Taking off the high spots with a really tiny cutter until an even surface is achieved:
IMG_3086.JPG - 68kB IMG_3089.JPG - 96kB IMG_3090.JPG - 96kB




After a bit of polishing the outer surface can be deemed worthy....also a glimpse at the black oxide coated holder I made for the cony bits to keep them from submitting to the call of the second law of thermodynamics (enthropy being the key word here :D )
IMG_3092.JPG - 77kB IMG_3096.JPG - 84kB IMG_3097.JPG - 93kB



A wee bit of heat helps to get the liner off the support without any troubles:


IMG_3098.JPG - 138kB



The arse end of the same support is machined to accomodate the concave image of the liner for a reversed seating and a matching cone in the tailstock shall support the copper while being glued to place:

IMG_3099.JPG - 91kB


Seems to turn out OK.....but the troubles began as I attempted to machine the inner surface flat. Seems that the seating was so perfect, the glue does not wick inbetween the surfaces and only holds the outer rim. Two times the liner came loose during machining...I gotta figure out something to rectify this:
IMG_3100.JPG - 87kB IMG_3101.JPG - 78kB

I am puzzled....that adhesive is like the devil when it comes to seeping between surfaces, even the tiniest microcracks are filled instantly and completely. And now it fails to the job....

[Edited on 21-1-2019 by markx]




Exact science is a figment of imagination.......
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MineMan
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[*] posted on 4-3-2019 at 23:13


In the spirt of Axt I would like to turn this thread in the direction of unconventional liner shapes if possible. Now, with 3D printing we can’t print any liner shape we dream of.


Does anyone have any documents or sources on active tamping, wave shaping, various liner shapes (tulip, fluted, swept, trumpet, bell, biconical, corrugated) that produce better penetration???

A former professor says he can grant me access to a 3D metal printer... so now that any shape (including thickness variations) is possible to manufacture... I am trying to determine which shape is the absolute optimum. My philosophy is to build on the shoulders of others... rather then reinvent the wheel

I plan to print the liner material from copper and print the wave shapers with plastic. Any shape of any complexity is possible.

Thank you! I am much looking forward to your responses.

[Edited on 5-3-2019 by MineMan]
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markx
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[*] posted on 5-3-2019 at 00:41


You can try the "x-charge": a classic cone liner with a mirroring cone waveshaper just behind it. The tips virtually connected. The cross section looks like a X shape....hence the designation. It was supposed to have greatly enhanced depth of penetration. For the life of me I can not remember where I read about this design. It was some kind of a document describing the developments of shaped devices in US military structures....

It is way more productive to cast the waveshapers from epoxy. Into molds formed from play dough. One can make numerous specimens in mere minutes. The original mold forming tool may be 3D printed if it is of a particular geometry.

[Edited on 5-3-2019 by markx]




Exact science is a figment of imagination.......
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MineMan
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[*] posted on 5-3-2019 at 18:58


Markx. You read that in “100 year history of shape charges”. They claimed to have accelerated EFPs to 6kms using the X Charge. Although little detail is given. For some reason, the current wave shapers I have seen are not mirror images...

A few months ago I saw a very complex waveshaper that was being modeled. It looked like symmetric claws... I can’t find that document anymore... it seems there has been a purge of this technology on the internet.

It sucks that I will only know the innovation of 40 years ago... it seems this material is home to so,e of the largest libraries... which are classified??
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markx
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[*] posted on 6-3-2019 at 01:18


Quote: Originally posted by MineMan  
Markx. You read that in “100 year history of shape charges”. They claimed to have accelerated EFPs to 6kms using the X Charge. Although little detail is given. For some reason, the current wave shapers I have seen are not mirror images...

A few months ago I saw a very complex waveshaper that was being modeled. It looked like symmetric claws... I can’t find that document anymore... it seems there has been a purge of this technology on the internet.

It sucks that I will only know the innovation of 40 years ago... it seems this material is home to so,e of the largest libraries... which are classified??


You are probably right, I remember there were a lot of historic descriptions of events represented in that book.

I know the "clawy" design you are talking about....if I recall correctly it was a novel approach regarding the formation of a large diameter jet that was almost equal to the diameter of the charge. Very complex approach from a technical side.

Old information is not of lesser value to the researcher, in fact I have often found the very opposite of that being true. And really for obvious reasons the contemporary discoveries in that field are not public knowledge nor will they ever be. So it is of little use to feel dissappointment about it :)
But on a generic level, given the emergence of destructive insanity that rises it's ugly head in the world, I fear that very soon we shall experience a major censorship ban on a great deal of information which we regard as being freely available. It shall happen quietly, gradually, in official denial of the fact and I feel it has already started. This process shall hardly be reversible in our lifetime and that truly is something that we should feel very much dissapointment about.




Exact science is a figment of imagination.......
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[*] posted on 6-3-2019 at 04:15


Quote: Originally posted by markx  

I fear that very soon we shall experience a major censorship ban on a great deal of information which we regard as being freely available. It shall happen quietly, gradually, in official denial of the fact and I feel it has already started. This process shall hardly be reversible in our lifetime and that truly is something that we should feel very much dissapointment about.


You are right.
This video was made by a friend: https://youtu.be/CMYEx4hEA3g

Before you say anything: the author is a chemical engineer, retired Navy EOD and now writes safety procedures for a refinery. So dont say he shouldnt touch it.

He made a wooden replica of that mine (shown at the end) for historical reasons, shared all the details with the World and... got a call from the authorities.

Apparently this could give bad ideas to bad people so he was asked to remove most information he had published...

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[*] posted on 8-4-2019 at 13:42


Greetings all. This be my first post though I've been lurking for quite awhile.

I've been bouncing around the interwebs in search for information referencing a shaped charge with cylindrical liner, but without much success. However today I found a patent that describes exactly that. Link below for those who may be interested.

https://patents.google.com/patent/US2988994A/en

-hellstrom

-btw, please feel free to correct me if I break any forum rules.
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[*] posted on 9-4-2019 at 15:11


Axt did try out a cylindrical liner here a long time ago. It's what got this thread going! But he's not active here anymore, and the design was just initiated from the back of the charge like most shape charges are. No special initiation points were used like they were in the patent.
https://www.sciencemadness.org/whisper/viewthread.php?tid=10...




Put that in your pipe and smoke it!
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[*] posted on 10-4-2019 at 16:42


I'm putting together a simplified version based on the patent. Probably not unlike the one built by Axt. Images and results to follow.

-hellstrom
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[*] posted on 11-4-2019 at 01:20


Sweet. I have an idea for a conical/cylindrical hydrid.... I would be interested in large dia cylindrical because theoretical one could only have 1.5cm of explosives around the inner pipe if it is thin enough. 4 inch or larger would be interesting.
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[*] posted on 7-5-2019 at 22:33


All. See what complex wave shaping is capable of!!

https://www.researchgate.net/profile/A_Resnyansky/publicatio...

Now my question to you fellow scientist is the paper says aluminum makes the best penetrator for copper because it matches the impedance of the concrete target....

Can someone explain this?

I thought penetration was all about, jet length, density and velocity... once again I guesss Newtonian physics is over simplified
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