-  [WT]  [Home] [Manage]

[Return] [Entire Thread] [Last 50 posts] [First 100 posts]
Posting mode: Reply
Name
Email
Subject   (reply to 2696)
Message
Captcha
File
File URL
Embed   Help
Password  (for post and file deletion)
  • Supported file types are: 7Z, GIF, JPG, PDF, PNG, RAR, SWF, ZIP
  • Maximum file size allowed is 5120 KB.
  • Images greater than 300x300 pixels will be thumbnailed.
  • Currently 551 unique user posts. View catalog

  • Blotter updated: 2017-02-04 Show/Hide Show All

File 136081076751.jpg - (10.33KB , 300x239 , futurama-world.jpg )
2696 No. 2696 ID: 8c1454
As decreed by the ancient profits of Threadology - welcome to the Acid Man explosives thread!

Some of this will be interesting, some of it will be boring, and some of it will be downright dangerous. Whichever you like best, all students in the Chemistry Class are required to

>Dealwithit.jpg

Explosives. Surely if there is a contention issue concerning possession by we mere "civilians" it is this. Nevermind that most of the great chemistry breakthroughs accomplished in this art over the centuries have been made by nerdy, unlicensed, obsessive men working in their kitchens and not in the great corporate laboratories of the world. Its amazing how the people will create something, and then the government has the right to claim it as their own domain and seize it from the populace. "For their own good", of course.

But I digress. All political opinions aside, explosives are not unlawful to play with provided one abides by the requirements of the law. The first thing we are going to discuss is legality.

>The absolute purpose of this thread is to be informative and educational, for the benefit of this community. NOTHING, and I can not emphasize this enough, that is presented in this thread is intended to be applied by any person or organization, including the author, in any manner which would be inconsistent with any local, state, or federal law under any circumstances. I ask and encourage the mods to keep a close watch on this thread and remove any content that violates this disclaimer, no matter who posts it.

The first thing to know when it concerns explosives law, is that you need a license to really get into the art. A Federal Explosives License is actually very easy to get! I know some of our community are HAM radio OPERATORs, and the difficulty of the requirement is actually very comparable. Let us look at the paperwork:

>The application for an ATF Explosives License:
http://www.atf.gov/forms/download/atf-f-5400-13.pdf

>Pertinent regulations and rules:
http://ecfr.gpoaccess.gov/cgi/t/text/text-idx?c=ecfr&rgn=div5&view=text&node=27:3.0.1.3.5&idno=27
http://www.atf.gov/publications/download/p/atf-p-5400-7.pdf

As you can see, the license to manufacture explosives costs a whopping $200. Chickenfeed compared to the trouble you'll be in for messing with this stuff much without one. If you only want to play around with explosives you purchase from other manufacturers, the "Limited Permit" classification is only $25! The paperwork is not difficult and only takes a few minutes to fill out and submit. You'll have ATF inspectors check out your location and give you a quick interview, and they'll give you a copy of the Regulations book and send you on your merry way. Easy peezy - so don't fuck it up! If you intend to store explosives for any length of time you will need a qualified magazine. These can be purchased for big bucks, or you can make one out of sand, cinderblocks, an old wall safe, and concrete in a safe outdoor location. It doesn't have to be big - I know a guy who built one for $250 that's only 1'x2'x10" deep - plenty big for an experimenter. The requirements are covered in the regulations - it has to be a certain size with a certain wall thickness and multiple locks, and be placed a safe distance from inhabitable buildings.

With the legal stuff outlined, lets take a look at the very basic chemistry that goes in in an explosive.

>What is an explosive?
>What are "High" and "Low" explosives?
>What is "detonation" as opposed to "deflagration"?
>What does "high order" mean?
>What are "confinement" and "critical diameter" and what role do they play?
>What kinds of chemical reactions (nitration, oxidation, reduction) make explosives?
>What chemicals are required to make these reactions?
>What are the general types of explosives (primary, secondary, booster, bulk) and what are they used for?

Welcome to the Acid Man Explosives Thread. Buckle your seatbelts, because V-Tech is about to kick in, yo!
187 posts omitted. Last 50 shown. Expand all images
>> No. 5980 ID: 5b9651
File 140010122670.jpg - (9.17KB , 267x400 , S15_P.jpg )
5980
Minor contribution:

Rather than the 50% ammonium hydroxide solution, nitromethane can also be sensitized by addition of either organic amines (possibly even hexamine, though I can't confirm this yet) or also these little guys.

http://www.shop3m.com/3m-glass-bubbles-s15-1-gal-sample.html

As specified in this patent and others:

http://www.google.st/patents/US6405627

The tl;dr is that the glass microspheres "crush" under the force of the initial blasting cap shockwave and function like microscopic shaped charges which amplify the explosive effect and help the shock propagate. They're going to reduce density somewhat, but you only need about 2-5% by weight of microspheres.

This would also have the advantage of eliminating the residual water that may be giving your formula some problems.
>> No. 6033 ID: ea79b1
File 140082064844.jpg - (12.43KB , 303x302 , woah.jpg )
6033
So... you call yourself Acid Man for a *reason.*

Wow.

/capped for posterity
>> No. 6787 ID: cbf3af
No way we're losing this one. Bumpage!
>> No. 6793 ID: 0dcdc8
File 141816230634.jpg - (87.79KB , 631x252 , home-header-fortune100.jpg )
6793
>>6787
In all seriousness why is this not either archived or pinned?

I use this thread for research material.
>> No. 6795 ID: 93d5d4
I PDF'D this thread three times already per update of course
>> No. 6796 ID: b109a5
>>4007
I'd like to request an FAE thread. That'd be very interesting.
>> No. 6809 ID: 19d17e
Hi Acid Man I have a couple of questions first can you teach me about hydrazine please? Second from what you've written a lot of these chemicals will explode just because the day ends in a "Y" has anything like that happened to you?
>> No. 7043 ID: 190dd4
Hey guys

I'm a little late to the party. Who has the files Acid uploaded to /z/ (the explosives and explosives-related thread I'd imagine was where they were) referenced in this thread? Or a backup of the entire thread on /z/ would be cool.

Also what about that shaped charge thread?
>> No. 7080 ID: f77a39
bump 8chn /k/ here. good shit. learning alot
>> No. 7081 ID: f77a39
can anyone repost the dead .pdfs?
>> No. 7082 ID: f77a39
>>3445
HOLY FUCK! electrical engineer here. my mind is exploding. its so simple yet makes so much sense
>> No. 7083 ID: bdc075
damnit acid man, I'd have loved to have read a thread of yours about biological / chemical weapons.

I wish we could have that thread, but without the whole .... you gunna get vanned thing.
>> No. 7103 ID: cae8b0
Acid, you ever pop on IRC anymore? I was shooting the shit with some grunts from our local combat engineer unit (potentially joining them in a year), had some interesting discussions regarding IEDs. My experience was from employing them as OPFOR/trying not to get blown up by OPFOR - theirs was "disarming" them with det cord or other explosives, but the actual explosives and detonators were essentially a mystery to us. Wanted to pick your brain about some things.
>> No. 7105 ID: 5b9651
>>7103

I VERY rarely get on IRC, but if you want to meet up and chat then sure.
>> No. 7107 ID: cae8b0
>>7105

Yeah, that'd be awesome, I'm EST but free monday anyways, let me know when you're likely to be on, I'll keep the client idling.
>> No. 7108 ID: cbf3af
>>7107

Late evenings mostly.
>> No. 7109 ID: cae8b0
Cool, I take it you're more likely on the 8chan irc eh?
>> No. 7110 ID: cbf3af
>>7109

No, only /k/ normally.
>> No. 7112 ID: adfbaa
>>7110
Thank god, I thought you were vanned. "Mind explaining all these books on explosives, insurgency and all this Rustle art work?"
>> No. 7113 ID: cbf3af
File 142933244225.jpg - (218.04KB , 1200x892 , 1425185610532.jpg )
7113
>>7112

I'm starting a Militia EOD unit composed entirely of cute lolis?

Anime of that when?

Nah, but I've been incredibly busy lately. Work has been brutal, and I ended up becoming the HMFIC of 8chan's main GamerGate hub, the third biggest board on the site. On top of that #GG has had nearly non-stop happenings since, so that eats a ton of time and energy.

Also I'm leaving my job to take up a slot as a regional manager for a large chain of gun stores in May. Its 40 hours a week instead of 60+, for the same take-home pay, and I get full benefits and a 20% commission, plus a company car for business trips! Getting prepped for that eats a lot of my time too.
>> No. 7114 ID: adfbaa
>>7113
>new job

Fantastic! That's good to hear, you were busting your ass for little pay and no appreciation. It's nice to see something working out.

Also, I'm so on board for a cute loli EOD unit. That'd make an awesome anime.
>> No. 7119 ID: 360825
>>7113
>>7114
I'd likely watch it.
>> No. 7121 ID: 12fd04
>>7113

I also would watch that anime.

Also, congrats on the new job.
>> No. 7124 ID: cae8b0
Aye, gratz on the better job man, I'm glad to hear you're going to be fucked with less.

I just had some questions about cheddite since something like it came up in a discussion I was having with some combat engineers up here (Canada). I had ideas on how it could be used by opfor/infantry as a field expediant explosive, wanted to know more about how fragile/sensitive it is and how hard it would be to set off... Also what it looked like and potential ways of defeating it. I blew up and was blown up by notional-ieds(aka co2 and talc powder) more than I cared for when I was in, and shit like this intrigues me, especially if it can be used to help educate grunts.
>> No. 7125 ID: 5b9651
>>7124

I'd be happy to answer but you've never been in IRC when I popped in, lol.

I know a bit about Cheddite. Fun stuff with a ton of history to it.
>> No. 7126 ID: cae8b0
>>7125

Yeah I got fucking destroyed by work myself, 6 day weeks from now until....sometime in the summer, when jobs start getting finished or we finally hire more people. Glad I booked this weekend for a cottage trip...so I also wont be around. I'll try and be on late all next week.
>> No. 7153 ID: add633
File 143127547931.jpg - (80.72KB , 358x524 , imhv3.jpg )
7153
What is your take on TM 31-210 ?

Is it a viable source book, and the information therein as safe (when made according to procedure) as the authors claim?

Reviews would be greatly appreciated
>> No. 7157 ID: 0dcdc8
>>7153
https://ia800308.us.archive.org/20/items/milmanual-tm-31-210-improvised-munitions-handbook/tm_31-210_improvised_munitions_handbook_text.pdf
>> No. 7202 ID: f8a67c
>>7153
I have it for casual reading. It is useful for getting the general synthesis down, but I would never use it. It's way too inaccurate to trust. Measuring solids out by volume. 'nuff said.
>> No. 7225 ID: aa6d56
>>3381
Hate to ask my question so late, but let's say I actually could get some hydrazine.

How exactly would you convert it to sodium azide?

Also, unrelated, but I've heard that Lead Azide is actually very sensitive to physical shocks that also generate friction (eg, leave it went on a tightly wound piece of string, and by the time it's done drying, pulling the string could set off the azide.) Is this true?
>> No. 7232 ID: f8a67c
>>7225
Hydrazine Sulfate isn't too hard to make. There have been several topics on Science madness on it. The main problem is the low yield. Converting the Hydrazine Sulfate to Hydrazine hydrate (and purifying it) is a bit more difficult and requires a silver flask if i recall Correctly.

I second this, just for the science behind it. Conversion of Hydrazine hydrate to Sodium Azide.
>> No. 7234 ID: f96448
Hey Acid Man, I'm assuming you already know, but you can order the acetic anhydride from S-A in useful amounts, even by the kg, for relatively cheap (Under $100 a kg, which for RDX I'd say is pretty good), or is there a reason you can't go that route even with an explosives license?

http://www.sigmaaldrich.com/catalog/product/sial/242845
>> No. 7240 ID: 67299a
>, acetic anhydride is listed as a U.S. DEA List II precursor,

you gonna get raped.
>> No. 7419 ID: 269349
What do you think about silver acetylide as a primary explosive? Sudden ded like organic peroxides or safer?
>> No. 7420 ID: 2b2389
Wow, is it really possible for an individual to obtain a license for explosives? Just some swingin' dick who isn't involved with explosives on a professional basis, but just wants to clear tree stumps on his back 40?

I wonder, how bad is the federal anal probing you have to go through? I assume your name gets added to several government lists, but are there any day-to-day effects, like profiling by LEOs or increased chance of IRS audits or some other shit?
>> No. 7439 ID: e1463b
>>7420
yes, if you meet the requirements
>> No. 7457 ID: 8af38a
I got a good quality scan of this book at my uni library this weekend: http://www.abebooks.com/Propellants-explosives-Chemical-technology-review-James/12123708105/bd

Going to be cleaning it up and putting it online this weekend, it has a lot of detailed processes for actually making explosives.
>> No. 7458 ID: 8af38a
>>7457

Here you go:

https://volafile.io/r/nUBJiG
>> No. 7459 ID: 8af38a
>>7458

Note there are some blurry pages I may have to go back and rescan some pages. Good news is most of the info in the book is from patents and includes the patent numbers if you need to look up anything that isn't showing up clearly in the scan.
>> No. 7460 ID: 62e17c
Can I haz this? plz
http://www.amazon.in/Modern-Methods-Applications-Analysis-Explosives/dp/0471965626

You know but don't have, I have but don't know, let me learn.
>> No. 7461 ID: 2f01dc
http://www.ebay.com/itm/Modern-Methods-and-Applications-in-Analysis-of-Explosives-/251493519825?hash=item3a8e2e91d1:i:251493519825
>> No. 7463 ID: 13b694
Great, thanks. This is going to help us a lot. And also, I'm using the modified Griess test to spot the PETN on the field, but I'm using KOH/Ethanol/Acetone solution to doit, but it is very volatile, it's hard to hydrolize the PETN. Is there a way to make this gel like or something in order to prevent this and make a better contact with the area in analsis? Or better yet, Is there another way to hydrolize the PETN on the field with another chemical?
>> No. 7464 ID: 13b694
Just to let you know, I'm working on a mining company, and we want to be sure that there are not traces of explosives after spillages or in our equipment when it needs to be repaired. Besides, the company is going to buy an HPLC equipment, so we need to be ready we it arrives. Thanks for the ebay tip.
>> No. 7465 ID: 2f01dc
I've got a program to Hopefully snipe the google books preview, but I don't think it's going to work.

Especially for buying it, for a company, just look around till you find a price you're willing to pay.
>> No. 7468 ID: eb5fad
  Lead(II) Azide synthesis video
>> No. 7469 ID: eb5fad
My question is how do detonators in artillery/tank and missiles actually work? I can't figure out how the shock from launching these doesn't set them off.
>> No. 7470 ID: 2f01dc
It depends on the fuse and the missile and the application. Look on dtic.mil and fuse technologies. All of them have multiple safety interlocks that can only be released via firing.

Some require rotations to unlock a balls, some require wind speed to unscrew a firing pin, some have timed interlocks (sorta kinda somewhat) and there's some designs that need the g force to activate a mercury switch to activate it so long as the projo is accellerating.
>> No. 7471 ID: 2f01dc
It depends on the fuse and the missile and the application. Look on dtic.mil and fuse technologies. All of them have multiple safety interlocks that can only be released via firing.

Some require rotations to unlock a balls, some require wind speed to unscrew a firing pin, some have timed interlocks (sorta kinda somewhat) and there's some designs that need the g force to activate a mercury switch to activate it so long as the projo is accellerating.
>> No. 7513 ID: 0dcdc8
File 145114015659.jpg - (109.60KB , 850x543 , pdj2828129.jpg )
7513
>>7469
Science....primarily mechanical engineering.
>> No. 7521 ID: d0cecd
>>7469
A common WWI and early WWII one is that the firing pin is held forward near the primer by some sort of fixing agent, can't move forward or back
When the shell is fired the inertia makes the pin snap free of the fixing agent and move back into a "cocked" position
Then when the shell hits something, the inertia slams the pin forward to hit the primer

There's many different ways to do it, various locking bolts and safety lugs, germans like ball-bearing safeties for example
[Return] [Entire Thread] [Last 50 posts] [First 100 posts]


Delete post []
Password  
Report post
Reason