Casings

[Random]

Originally Posted by General Grim

Continue arguing and I'll negative rep both of you and report your posts.

If they continue arguing, they will both be banned. Indefinately.

Several posts from the both of you have been deleted, because those posts contained nothing but your bitching back and forth. Post something useful, or don't post.

Final warning.

[Bahr]

I dont know if any has said this yet but the cardboard on those clothes hangers work pretty good.

[Dealer-K]

For smokeless powerder and cherrybombs i use thin, cheap contact lense cases that i can find at wal-mart. Also some magic supply or firework surplus stores sell exploding (also called flaming, buring, magic flame etc...) paper that is good to line casings with and attach to fuses. makes sure that ignition happens fast.

pvc pipe is good for larger explosives too. if you scour the outside with a saw, smaller shrapnel pieces can be made too.

[General Grim]

Originally Posted by makuza

Quoted post deleted.

Why the hell should he stop? So you're trying to get rid of someone who's potentially preventing you from killing yourselves?

I honestly would rather that many of the kewls on this site would just die, but the repercussions means that there are further restrictions on fireworks and chemicals. If you don't like being corrected, don't make mistakes.

[X-ray Cat]

Pvc tubes are nice and cheap for blasting caps. Dustbin bags with HE wrapped around another plastic bag with booster that is connected to a blasting cap will fully detonate when dugg in under some sand. don't even have to cover it with sand, just bury a bit

[pyrokitty14]

co2 cartridges work great in terms of shrapnel and loudness but if it's blasting caps you want i do not know.







edit: the co2 cartridges are very deadly and you don't have to fill them with explosives. you can just set 'em on fire and they blow up.

[Hetfield]

This will explode but it is not a Pyrotechnic Explosion Per'se, (Dont know how to spell that lol) as CO2 is not flammable.

All that is happening is that the gas is heating and therefore expanding with a pressure that cannot be contained, causing the casing to rupture.

Not being pedantic but these things shold be cleared up for the absolute beginners visiting this forum.

Im not trying to be a dick BTW.

-Hetfield

[Rebel52]

Originally Posted by kbk

I have heard of people using straws for blasting cap purposes...Also bottle caps.

Ya I use them all the time. I usually stuff a cut piece from a straw with AP. It works very well.

[X-ray Cat]

Have you detonated anfo with the straw?

[killerofall]

I never used it for anything other than sparkler bombs (crushed up the stuff on sparklers and put them in a pill bottle) but a bigger straw from a gas station (QT) fits a firecracker so if you take a firecracker and break it in half it will shoot out a stream of sparks and ignight whats in the straw. I use water dynomite with just a litle bit of paper towell wraped around it. gives you about a ten second fuse.

Also made a airsoft cannon out of a barrel out of an airsoft gun and same type of explosive.

[Hetfield]

Why use a cap for a sparkler powder based "charge" ?

a flame would work just fine!

[killerofall]

Originally Posted by Hetfield

Why use a cap for a sparkler powder based "charge" ?

a flame would work just fine!

If not its hard to ingnite and only about 20% will go off the rest just blows away with a flame. I just used the sprkler powder crushed up not what most people consider a sparkler bomb. I found all this out threw lots of trial and error.

I did this years ago before i was able to get any real black powder, or knew how to make anything.

[hellofraz1]

Personaly i use drinking straws for my blasting caps. They are suprisingly effective, i have detonated ANFO and Ammonal with drinking straw caps. I would advise using the thickest straws you can find such as milkshake straws.

video of a detonation of blasting cap and booster both cases i made out of thick drinking straws. :

YouTube - ETN Explosive (6g Charge)

enjoy.........

[death-of-light]

OK, the raw fact that no one has thought of this ,or posted it makes me think that all the good members went to rx29a.
so to get started this is for a blasting cap but it could be scaled up for larger purposes,lets get started.
first ,this is made of things you probably have sitting next to you as your reading this.

materials:
printer paper
tape
a pencil
paraffin wax
a heat source

Procedure:
trim the paper a little over half way with wise.
take the sheet of paper and align it with the metal ring of your pencil.


roll the paper into a tube and tape it so it stays.

now you should notice about a half inch of empty space at the end ,if not move the pencil a little.
Now the delicate part .
"gently"fold in the end of the tube in on itself .

OK now hold it in your hand, eraser touching thumb,and smash the end on the desk,pull threepence out ,and heat up the wax.

once the wax is literally boiling hole the smashed end in you should do this several times to ensure it is sealed.
now your finished fill it with whatever you want organic peroxides ,boosters,hell even nitro the hot wax makes it water proof so have fun

[death-of-light]

end product

[Widigo]

I have a quick question:

Does the pressure flash powder builds have any impact on the flash's size or brilliance? What explosive would you use if you needed noise. I want a sudden and very loud rapport. Like a novelty firework only much louder. The same question as above. Would the pressure it built up in the casing have any impact on it's potency? I ask because I am trying to decide what casings I should plan on needing for the results I want to yield. Another question; what is a good way to strengthen a thin card stock casing. It's intended for a smoke bomb so the pressure is not a big deal, but I want it a bit stronger. I was considering aluminum foil. Would the metal have any impact on the explosive since there is something between it and the chemicals themselves?

Edit: Just read the above post. I actually did something very similar using card stock. Only I use a glue stick for a standard diameter. I use electrical tape. This may be an answer to the above question. Wax would work similar to or in tandem with aluminum foil.

Edit 2: I have attached a crude image of my Dine Piece. It's a case made on cardstock, white glue, electrical tape, five pennies and a nickle. The point being to weigh one side down so that the tube when tossed with a smoke mixture will keep it's angle enough that the smoke generates a stream instead of flipping in a more difficulty to predict pattern. It has a coating of rubber cement that I hope will be flammable enough to burn the casing leaving only loose change to prove it was there. I will test this this weekend. However, I made one, and tossed it every which way and for the most part it seems weighted enough. I may need to make it a quarter piece by adding more nickles, but it is rather strong.

Edit 3: This is the most edited post ever. has anyone ever tried clay, Terra cotta, porcelain, or any other moldable material in their cases? I have always wanted to. I think it's the cheapest way to get uniform, professional results at the small shop level. Other than metal of course. I would like to experiment with shrapnel and strength. I am still looking for something to hold large smoke mixtures that would be easily thrown and would still land correctly. So I drew up this. Sorry for the poor craftsmanship, my compass and ruler are AWOL. My idea here was that a base weighted with lead would want to fall first. If I could round the edges it would roll correctly like an inflatable bop 'em toy. The vent along the side of the cone, and the holes would all have a thin layer of paper over them that would allow any kempt up gasses to escape without shattering the vessel, and they would allow smoke to escape faster as the spark reached the large mass of smoke mixture at the bottom. I understand that these are not really questions, more of discussion and show and tell. If you have any input I'd love to hear it. Most of what I do will never happen. Most of what I design is with theorized intentions. When I came here it was originally for research for a story I was writing, and now I'm addicted to this stuff.

[willi-wurm]

Just a little thing, a casing can be a matter of life and death. Refrain from using metals, as they are extremely dangerous, not very flexible, react with peroxides and with HMTD. Also, a little side note, a friend of mine made a really simple explosive. AP, in a bottlecap, duct taped up to the size of a lime. He had 3. they had a charge of about 2 grams, no fuse, we did the first 2, by making an ethanol wall of fire, igniting the ball, and the fire took about 4 minutes to make the AP explode. same goes for the next one. the third one though, we thought we had time, so i light it, and the instant i flick my lighter, it blows up, and im covered in shrapnels of duct tape. whisling in my ear, i look down to my hand. the metal plate on the lighter is lodged in my ring finger, my middle fingers nail is not there anymore. my thumbs skin is ruined. blood collects under the skin, it swells up. my friends are shouting at me, i dont hear it. adrenaline rushes through my vains. i wander aimlessly, shocked, to notice my glasses are shattered. a triangular piece of bottle cap is stuck in my sunglasses, which shattered.

in the end i was ok, just my thumbs fucked, and my nails really ugly, but other than that im ok. but recalling, i was covered in duct tape bits, maybe 2by 2 mm. now imagine all that were metal.

all im saying is that you still get a bang with flexible materials (ballon inflation principle) often even louder than with metal. (think how much gas you would need to pop a ballon made of metal).

keep safe kids.


Random says: This is why safety is important...

[Widigo]

That was one of my questions: will the casing thickness help with noise generation. Thank you.

[willi-wurm]

fuck yeah it will! the idea of a casing is to trap the gasses, to the point it explodes, releasing the gasses at a speed, often breaking the speed of sound. without the casing, it only an HE would still be loud.

imagine it like this. whats easier, blowing up a ballon until it pops, or blowing up a ballon up, that has numerous holes in it, till it pops. and 3 times may you guess which is louder.

[_JT_]

I like to use the little tubes that sit in the middle of receipt paper rolls from cash registers. I fill in the ends with dowel, with the charge packed in the middle, and one of the dowel plugs drilled for the ignition cable, then the whole thing is sealed in epoxy.

I find them the perfect size for loud bangs without having to use a lot of composition.

[spunone69]

Anybody who wants tubing, mortar shell casings, fuse, wireless ignition systems for fireworks etc should check out pyrocreations...just do a google search! I get all my red/silver cardboard tubes from them, they have everything from 1/2" all the way up to 6" diameter for both tubes and mortar casings. But if you buy their fuse, be sure to get the "American" made stuff, the Chinese fuse that they sell burns WAY too fast and it's not consistent at all.