Welcome!

Name
Email
Subject
Comment *
File	Select/drop/paste files here
* = required field	[▶ Show post options & limits] Confused? See the FAQ.

Options	Do not bump (you can also write sage in the email field) Spoiler images (this replaces the thumbnails of your images with question marks)
Password	(For file and post deletion.)
Allowed file types:jpg, jpeg, gif, png, webm, mp4 Max filesize is 8 MB. Max image dimensions are 10000 x 10000. You may upload 1 per post.

File: 1435772070454.jpg (80.33 KB, 1140x969, 20:17, Operation_Upshot-Knothole_….jpg)

Welcome! Chief Minister of Exploding 07/01/15 (Wed) 17:34:30 No.1

Hello there!

If you can't figure it out, I'm here to make explosives with your guys!

Everything from somewhat obscure shit like HMX, TACC, TACN, R-salt, Explosive metal salts, and so on, to regular community staples or at least better publicly known things like RDX, TNT, Nitroglycerin, HMTD, ETN, Ammonium Nitrate based sprengel's, Flashpowders, and so on.

Please share recipes, experiments, processes, chemical suppliers, whatever you've got!

We're here to have fun, help one another not lose fingers and eyeballs, and eventually make and hopefully discover some real obscure explosive recipes!

But that's just my personal goal. I'm sure most of you are in this just to have fun and learn the basics.

Good luck and happy blasting!

if you aren't just here to learn, I mean.

Feel free to give a quick intro of who you are and what you already know so as to give everyone an idea of what the rest of us are interested in!

Post last edited at 07/03/15 (Fri) 19:08:31

Archiving the fun :D Azide 07/12/15 (Sun) 11:12:25 No.14

File: 1436699546223.jpg (349.71 KB, 3072x2050, 1536:1025, Stipula_fountain_pen.jpg)

Hi all you mad scientists and backyard cooks!

wouldn't it be a great idea to make all the cool information/warnings/recipes etc into a cult book?

I'm an 18 year old chemistry enthusiast and a general newbie but I think I could get the time together to write/maintain a book with this awesome community

so what do you think?

good idea/bad idea? why would we and why not?

what would the (working)title be and what chapters would be in them

If this idea is accepted by the /pyro/maniacs I will personally maintain this little project and dedicate it to all the mad scientists

and remember folks its all for the "notitia voluntas tantum" and the boom ofcourse

Azide 07/12/15 (Sun) 11:13:45 No.15

>>14

my noobishness is showing isnt it?

making this a thread and not a fucking reply

Mad Scientist 07/13/15 (Mon) 16:17:45 No.23

Know anything about Luperox A98?I have 2 1lbs bags of it and and dont know what to do with it.

CMOE 07/14/15 (Tue) 01:56:23 No.27

>>23

Get a shovel and some concrete buddy….

http://boards.straightdope.com/sdmb/showthread.php?t=455686

You have very pure Benzyl peroxide, and apparently that's not so fun to play with.

According to that link it's RE factor is fucking 25, which is absolutely INSANE.

I'll look up some more info real quick, but everything I've read so far sounds SCARY.

Edit:

Yep, Page 38 of this report:

http://www.inchem.org/documents/sids/sids/benzoylper.pdf

Bonus edit:

I doubt the RE factor of 25, but for reference, an "RE" factor is relative effectiveness factor, compared to TNT.

Basically, a factor of 25 would mean it's… twenty five times more powerful than TNT. I'm not sure that's actually possible?

Bonus bonus lemonade and reese's pieces edit:

Forget everuthing I said. it's not an RE factor of 25, and not primary.

That said, it is still a relatively powerful explosive. You will need a blasting cap to set it off. Good luck and have fun I guess?

Post last edited at 07/14/15 (Tue) 06:20:27

Mad Scientist 07/14/15 (Tue) 16:16:09 No.29

Thanks guys for the info.This stuff is about 18 years old unopened in the bags.I just moved it from my garage to my barn.Would prefer to just pour it across the ground in small parts.Would this be advisable or to dangerous?

Mad Scientist 07/15/15 (Wed) 01:56:36 No.31

>>29

I'm not sure how exactly to handle it honestly. It is explosive, but it's poorly researched in terms of what will set it off.

It's RE factor is probably closer to .25, but that's still a respectable explosive.

If I was going to dispose of this, I'd dig a 4' deep hole, get a few sand bangs, place the bags in gingerly, and either bury it and stack sandbags on the top, or just blow it up.

If It touched off while you were pouring it out the amount we're talking about would rend you in half, and there's very poor information on how sensitive it is in a pure fresh state, nevermind after 18 years in someone's garage man.

Might be worth it to call your local PD/FD and have them deal with it at that point.

If you've got some balls and a gas mask, supposedly, it can be destroyed by mixing in some NaOH slowly, but I'd recommend doing that in a bucket inside a pit. The fumes emitted are probably pretty god awful.

If you want more information than I very strongly suggest you do some research specifically on Benzyl Peroxide and reach your own conclusion.

Mad Scientist 08/05/15 (Wed) 03:08:52 No.39

Are there any resources for finding explosives for a particular application?

Personally I'm looking into using resistance heating to ignite smokeless powder for use with 3d printed cartridges. The problem with this method, is even if it works, I'll need to use some bulky electronics for it.

If there is an explosive out there that can be detonated with heat, it is not very susceptible to shock, and its byproducts are non-corrosive, I could possibly use it as a primer, heat it, and use its detonation to detonate the rest of the gunpowder in my cartridge.

CMOE 08/09/15 (Sun) 01:49:29 No.40

>>39

Lead Azide makes for great detonators/primers.

It's still used in modern detonators today, and it started out being used in Artillery detonators, so you can more or less literally shoot it out of a cannon without it exploding.

But if you're looking for something that generates heat using electronics, you might just want to go with some kind of nichrome wire EBW using very thin gauge wire…..

The only other thing I can think of is perhaps a flashpowder or a chlorate primer.

If you want to find more info, sciencemadness has a pretty awesome library of A-Z of explosives:

http://www.sciencemadness.org/talk/viewthread.php?tid=6664

http://www.sciencemadness.org/talk/viewthread.php?tid=3724

I don't know what the design itself looks like so I can't give you much more help than that.

Mad Scientist 08/09/15 (Sun) 03:19:41 No.42

>>40

Well the current "primerless" design is to run a bunch of 26 gauge kanthal wire inside the cartridge to touch a bunch of the powder and then ignite it all at once with a burst of electricity.

However this might require a lot of energy to work, which would start making the electronics complex and the weight having more impact on the portability of the weapon. I was thinking if I just heated up a primer it would require only enough energy to ignite the primer.

Mad Scientist 08/11/15 (Tue) 04:43:54 No.46

File: 1439268234211.png (6.84 KB, 1064x590, 532:295, Primer Design.png)

>>42

That works, but the only thing that comes to mind is a sytem that loops a wire through a primer of lead azide.

Something like pic related.

Basically there are two half disks that partially overlap with a a bit of insulation so that the only way to complete the circuit is through your heating element wire. Pull the trigger and two pins on the Bolt face run current through the disks, positive and negative don't matter because it's basically an EBW setup. It just has to dump enough current to heat the wire red hot, which a lot of wire types are very good at, especially higher resistance stuff like nichrome.

I think it might be less of a headache to use in terms of design problems, but the issue you'll run into is the fine components of the design. There's probably a simpler way to do this that I'm not thinking of, but there's my go at it.

Mad Scientist 08/12/15 (Wed) 02:38:40 No.48

>>46

I've got an idea of how to get the current to the wire, the only problem is the compound to use as a primer. Lead styphnate is very sensitive, and would not be good for a primer in this case, and I don't think lead azide would either. I need something that can be handled and formed without risk of exploding while being inserted in the cartridge.

I need something that:

A. does not throw off corrosive byproducts

B. is resistant to physical handling/shock

C. is solid at room temperature

lead azide doesn't work in this case because it doesn't fall under B.

Bonus points for D: can be molded or cast to shape.

Mad Scientist 08/12/15 (Wed) 05:29:29 No.49

>>48

Hmm…

That's a bit of a tall order.

The only things that come to mind are either nitrocellulose with some kind of sensitizer, or a rocket candy type fuel.

Lead Styphnate is somewhat sensitive, but it's also fairly week and not overly bad or unstable.

Lead Azide is a bit like it's older cousin really.

If you wanted a primer sensitive to heat and don't want something like lead azide, then perhaps a chlorate based flash powder?

Flash powders in general are powders and easily pour into containers above a certain mass, are pretty good about handling (as long as you don't apply direct flame or such, not much to worry about) and they are solid at room temperature.

Not sure about the auto ignition temperature though, that could be a problem for you. Might be worth a test at least, flash powder is fairly cheap and easy, even in larger amounts.

Mad Scientist 08/13/15 (Thu) 00:33:26 No.50

flash powder (nitrocellulose) is actually one of the components of smokeless powder.

Isn't a primer compound supposed to expand faster than the secondary explosive that it is trying to detonate, in order to ensure more complete detonation?

Temperature will not be a problem. I have figured out the electronics required to produce more than enough energy and do so quickly.

Mad Scientist 08/13/15 (Thu) 02:15:51 No.51

>>49

ignore my previous comment regarding detonation velocity. Apparently lead styphnate detonates a 5200 m/s while nitrocellulose detonates at 7300 m/s.

Furthermore, I was confused. I saw flash powder and thought of flash paper. the two are different, ignore my error.

Aside from being sensitive to shock, is there any other reason why lead styphnate is used as a primer? I would think a bit of nitrocellulose heated quickly would easily replace it, but is there some other property to it that I'm ignoring?

Also flash powder might work, I'd prefer if a binder could be used with it to make it into a pellet, also is there something that could be mixed into it to make it less sensitive to shock and static electricity? I know that smokeless powder granules are coated in graphite to make them more resistant to static shock, perhaps that could be added as well. Wikipedia says they are very sensitive to shock, though I don't know how sensitive we're talking here.

Mad Scientist 08/13/15 (Thu) 05:29:34 No.52

>>50

No, not necessarily, it just has to produce enough shock to destabilize the secondary.

>>51

I'm not sure entirely about the nitrocellulose so much as that most guns have up to this point been mechanically fired devices with no electrical components more for ruggedness. Since this basically sounds like R&D that's not as much of a concern for you I guess and it does sound like a pretty sweet idea.

Flash Powder can be binded, depending on the composition. It's not actually as sensitive as you might think, at least if you go with something like coated aluminum. They are sensitive to shock, but not as dangerous to handle as something like Azide or anything that's a genuine primary explosive as far as I've experienced. Flash is a low explosive generally speaking.

Most binded flash compositions I know of use dextrin, but the result isn't useable as a propellant generally speaking. Perhaps if you used an incendiary compound to touch of your propellant proper. That was where I was going with this, and flash powder is only a few simple modifications away from something like thermite flash or a sparkler mixture.

Just a heads up, but NC is mostly a low explosive really, I don't think it actually detonates….. And when it does deflagrate it's closer to the 3000 M/s range as far as I know.

That said, It sounds like you're doing a lot of reading on this stuff. That's good and it'll probably help set you on the right track just as much if not more than anything I have to offer.