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| Backyard Ballistics This forum is dedicated to the safe teaching and responsible handling of high and low explosives. You will not find any information on how to make "bombs" or any such device(s) . Backyard ballistics will teach you the science and the art of pyrotechnics and how to manufacture and use explosives/pyrotechnics safely and responsibly. Backyard ballistics is also a haven for rocketry and pneumatic cannons. All information contained within this forum is for educational purposes ONLY. Totse does not accept responsiblity for any incident involving the use of the information contained within this forum. |
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#1
 2001-06-05, 01:58
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GHETTO_SMURF 
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a bad idea for all you people to ponder...
I require a little bit of help with this topic. "I have a dream..." to make a 'bomb' of sorts. (tell me if this could work in any way)
OK, here goes
Take a pipe, preferable 3" diam. or more by 8" long, pvc (with low sch), and drill small holes (small as in finishing nail small)...about every .5" up the tube(rows) and then every 1.5" around the barrel (columns).
Get a piece of smaller pvc tube...about 1" or less pvc and still 8" long. Cap one end and fill it with a smokebomb mixture (i will be using slat peter and sugar in a 3:1 ratio). Pour the liquid mixture into the pipe and put in a nice long cannon fuse (water proof for special occations) befor it sets. So now you have on smoke bomb and a tube with a buncha nails in it.
Next...cap the 3" tube and plop the pvc smokebomb inside...dab some cement (pvc only) on the capped end of the smokebomb and put that in the middle of the capped end of the 3" pvc.
Now...the tricky part...what kind of solution or mixture can i use so that it is powerful enough that the amount between the two tubes is enough the destroy both tubes and send the nails a buzin'?
------------------ ------------------ ok...if you say so ------------------ for informational purposes only http://spudszilla.cjb.net
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#2
 2001-06-05, 02:33
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White Witch 
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Re: a bad idea for all you people to ponder...
im confused. you drill holes in the pipe then it just becomes a whistling dixie or will start spraying out of the wholes and make it spin like a faming butterfly.
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#3
 2001-06-05, 03:15
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GHETTO_SMURF 
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Re: a bad idea for all you people to ponder...
no no...after the smokebomb finished burning..i want the heat of it to set off a coil that will in turn set off the 'explosive mixture' that i would like suggestions for...i want the mixture to rip the pvc to shreds and send the nails flying!
------------------ ------------------ ok...if you say so ------------------ for informational purposes only http://spudszilla.cjb.net
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#4
 2001-06-05, 03:17
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raverdude56001 
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Re: a bad idea for all you people to ponder...
i think what he is sayin is that the preasure from the smoke building up inside the tube will shoot out the nails that are in the pre-drilled wholes.
I don't think there would be enough preasure inside the tube to blast out the nails. but i would just make a small version of it and just do some testing.
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#5
 2001-06-05, 03:46
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GHETTO_SMURF 
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Re: a bad idea for all you people to ponder...
no no no...okay..you hvae the smokepowder burning right...then when it get's to the bottom of the barrel..the heat sets off a filament that get's enough heat to explode the 'mixture' which will inturn...make the whol cartridge shrapnel, including nails.
------------------ ------------------ ok...if you say so ------------------ for informational purposes only http://spudszilla.cjb.net
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#6
 2001-06-05, 22:45
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unstable247 
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Re: a bad idea for all you people to ponder...
ok i gotcha. so basically what you're trying to do is make something that you ignite one fuse, throw it, and it gives off a lot of smoke. after the smoke is done, the shrapnel grenade goes off.
first off, dont use a 3:1 ratio, 3:2 is much better.
going with your method, i would make it so that theres a fuse that goes from the bottom of the smokebomb mixture to the explosive component in the outer pipe. this way, once the smoke composition nears the bottom, it will light the fuse, which will lead to the outer pipe, and explode.
but your method isn't so good.
im almost certain that the heat created by the inner smoke bomb will be enough to set off the powder in the shrapnel grenade thing. them smokebombs get HOT!
so what i would do is this: take a pipe, and fill it with smokebomb composition, while eaveing both ends uncapped. then put a fuse (probably a foot long) at the BOTTOM of the smoke stuff, whcich would be the opposite side of the fuse that you ignite. have this bottom fuse lead to a pipe bomb, which is filled with either black powder or flash powder (the latter is better).
this way, you light the top fuse. it leads to the smokebomb, which burns all the way through. once it gets to the bottom, it ignites the second, footlong fuse. this one leads to the pipe bomb, that goes off, sending the shrapnel flying everywhere. the pipe itself will make a good amount of shrapnel, but throwing a bunch of ball bearing inside the pipe, mixed in with the powder, would give off shrapnel like theres no tomorrow.
what are you gonna use this for anyway?
(this is for informational purposes only. i, the author, am not responsible for what you do with this information)
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#7
 2001-06-05, 23:44
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Minami_Sasake 
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Re: a bad idea for all you people to ponder...
I think he's hoping the smoke will attract a crowd of onlookers. Some bright spark will say, "A smoke bomb. Isn't that cute?" and then pick it up...
Squish.
------------------ Day must fade to night, Night must give in to sunrise, I watch, silently.
~A Haiku, Minami Sasake
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#8
 2001-06-06, 05:23
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CulexuS 
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Re: a bad idea for all you people to ponder...
hahaha
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#9
 2001-06-06, 09:42
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polos 
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Re: a bad idea for all you people to ponder...
Hmmm, arent those nails a bit small, i also think that steel balls would have a greater affect. But still i think that the smoke bomb will ignite the the outer filling either way. its a question of how long will it take for the smoke bomb to heat up enough.
otherwise for shrapnel, id suggest a cast iron pipe. i'm sure any old junk yard would produce something usefull.
i have contemplated on filling those little CO2 bottles with a mixture of potasium nitrate and magnesium filings
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#10
 2001-06-06, 14:34
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GHETTO_SMURF 
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Re: a bad idea for all you people to ponder...
for a fuse i am using some cannon fuse, and for shrapnel inside the 'boom tube' i think i might go with some 1/4" nuts & bolts  i haven't tried the flash powder yet and hopefully i can get some sooon. In the mean time i am trying to make the formula c-4 from asprin. *can i use acetaminophen?* i'm going to try alot of things to get it right. about the 3:2 ratio..thank you...i have been trying to get the best known ratio from ppl and finally i have it...look out! how much is pot. nitrate (salt peter) in your area...because it is such a slow seller you have to order it from pharmacies...i can order 2kg for $16.00 CAN...what about you? ------------------ ------------------ ok...if you say so ------------------ for informational purposes only http://spudszilla.cjb.net
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#11
 2001-06-06, 23:16
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unstable247 
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Re: a bad idea for all you people to ponder...
thats a fair price, its usually about 3.50 a pound, and 2 kilograms is 4.4 pounds.
what is potassium nitrate used for in pharmacies. i'd like to go into a pharmacy and ask for some, but im afraid theyll ask what i need it for, and i wont know what its normal use is (since im gonna use it for explosives) and then theyll get suspicious and call the cops and ill go to jail and get buttraped. so whats it used for?
that aspirin formula does not produce c-4. it does produce some kind of explosive, though i am not sure what that explosive is like. its not c-4 though. c-4 is plasticized RDX. good stuff.
also, im not sure if you can buy flash powder easily. to make it, just mix a 2:1 ratio of an oxidizer to a fuel. and no, a fuel is not gasoline. the best oxidizer is probably potassium perchlorate, and the best fuel is either aluminum powder or magnesium powder. the finer, the better.
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#12
 2001-06-06, 23:30
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GHETTO_SMURF 
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Re: a bad idea for all you people to ponder...
*a mother of a friend of mine told 'us' that pot. nitrate (salt peter) was once used to make children steril. if the parents found out that thei child was having intercourse, they would put this in their food so that they wouldn't be able to get horny (opposite of viagra!)
*i am sorry for the mis-type...i was in a hurry and i just wrote 'c-4' because i wasn't thinking straight. *my bad*
*pot. perchlorate hmmmmmm? i think my sci. lab might have some of that...but mabey i wont try that stuff yet...when you say flash powder...do you mean that when it explodes it creates a flash of bright light of a nice big 'ka-boom'?
------------------ ------------------ ok...if you say so ------------------ for informational purposes only http://spudszilla.cjb.net
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#13
 2001-06-07, 05:42
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d1ng0 
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Re: a bad idea for all you people to ponder...
Potassium Nitrate is used by some of the sheep farmers around here as a diuretic (sp?) for their sheep. I know when I went through Marine Corps boot camp (way back when) they actually used it in the food so us poor little recruits wouldn't wake up with a woody and rape the drill instructors or something... :-) Don't know if they still do that or not.
The aspirin formula, if it's the one I think you're referring to, is supposed to make a crude form of picric acid. Don't know if it's REALLY picric acid, but I've had some luck with it though.
All of my materials (except the aspirin) and procedures have been consistent each time I've done it but every batch has turned out and reacted different, which leads me to believe that the aspirin is the biggest, or the only, variable in the whole thing.
*can i use acetaminophen?* No. It has to be real aspirin. Get the 'generic' non-buffered (non-coated) kind.
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#14
 2001-06-07, 18:06
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unstable247 
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Re: a bad idea for all you people to ponder...
wait, so im supposed to walk into a pharmacy and ask for potassium nitrate because i want to stop getting boners? ok.......
if you dont have potassium perchlorate then just use one of the other oxidizers: potassium chlorate, potassium permanganate (that stuff's easy to get), sodium chlorate, sodium perchlorate, sodium nitrate, potassium nitrate (its the weakest of the oxidizers, but it works), and barium nitrate off the top of my head. make these oxidizers as finely powdered as possible.
flash powder is basically the stuff in firecrackers, and good m-80's and m-100's. the reason i say good is because now people just put black powder in them and call them m-80's while theyre not as good. now flash powder is good stuff. its got a pretty good brisance level (for a deflagrating explosive), it burns VERY fast, makes expanding gas at incredible rates which makes it good for use in firecrackers, and it damn powerful. i read that 4 oz of flash powder has the brisance of 1 stick of dynamite, though im not sure if thats true. as for the speed, large amounts ( like 6 oz or more) will make a loud boom even when unconfined! the reason is this. normally, the boom of a firecracker is the sound of the container bursting quickly. dont believe me? take a handful, hell take a barrelfull of black powder unconfined (like in a pile) and ignite it. its will make a loud whoosh and give off a lot of smoke. now put about 5 grams in a well sealed, strong container with a fuse, and ignite it. it will make a very loud boom. now flash powder in large amounts will burn so fast, that the air around it wont have time to get out of the way of the expanding gasses, so THE AIR BECOMES ITS CONTAINER. when this "container" bursts, its called a shockwave, since it travels through the rest of the air.
yes i remember now that procedure gives off picric acid, which is a kinda sensitive high explosive if detonated. it can also be ignited. i wouldnt really suggest using it in your little contraption, ghetto smurf, since large amounts of sensitive explosives will detonate under their own weight.
if u must make it, look for the bottle that has the ingredient "acetylsalycilic acid" i think thats how you spell it.
ok bye.
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#15
 2001-06-07, 22:47
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GHETTO_SMURF 
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Re: a bad idea for all you people to ponder...
for the aluminum powder ingredient..i went to http://www.pyrotek.org ...which aluminun powder should i use?
------------------ ------------------ ok...if you say so ------------------ for informational purposes only http://spudszilla.cjb.net
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#16
 2001-06-08, 10:07
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polos 
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Re: a bad idea for all you people to ponder...
hmmm, potassium nitrate is one of my favourite oxidizers, coz the reaction is not that fast. rockets dont blow up side ways and stuff. its also used as a fertilizer.
so, unstable, if you want salt peter, it can be found in some fertilizers in quite a pure form. but if want to buy it at a pharmacy then i suggest saying that you own a fish tank and you are trying to grow some special plants. thus you need it clean, otherwise your 200 pounds each discus fish will die.
otherwise i never had problems buying the stuff, but this was back in south africa. i tried to by some silver nitrate here in this country and they told me, ehem cannot sell it to you. oh hell then i have to make my own.
silver acetylide burns really fast. in fact when it burns it gives off a sharp crack. i reckon that a tea spoon off the stuff will rip a whole in a wall. otherwise its so stable that i have put it inside hollow point bullets, and it leaves the barrel and only explodes on impact. ive seen that shot into a 5 liter oil can makes an impressive entry hole, but no exit hole, quite destructive. that is why i also asked about the copper acetylide. copper is cheaper than silver. but i am rather unsucsesfull in the production of it
back to the salt peter, i have seen ratio of salt peter and magnesium that ripped a rocket to shit, woke the entire neighbourhood, resulted also in a whack from my dad, and blinding me shitless for a few minutes.
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#17
 2001-06-08, 19:12
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GHETTO_SMURF 
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Re: a bad idea for all you people to ponder...
** holy shit **
------------------ ------------------ ok...if you say so ------------------ for informational purposes only http://spudszilla.cjb.net
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#18
 2001-06-10, 07:03
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unstable247 
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Re: a bad idea for all you people to ponder...
yes potassium nitrate is especially good for use in rockets because of its tendancy to burn slowly and give off a lot of hot, expanding gasses. this also makes it good for use in smokebombs.
but for fast burning flashpowders, the higher oxidation rate the better.
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#19
 2001-06-11, 12:58
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anthracis 
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Re: a bad idea for all you people to ponder...
NORMAL IS A WASHING MACHINE PROGRAM
An interesting mixture is that with Ba(NO3)2 and Al powder in stoechiometric proportions for the reaction: Ba(NO3)2 + 2Al--->Ba + 2 Al2O3 + N2
By hazard I made once this mix in the right proportion and I lighted a small amount(about 1-2g) WITH A MATCH!IT WAS REALLY HOT,MY FINGERS MAY TELL YOU!In crackers went well. About the rockets(it's out of topic but will do...)wait news from me.
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#20
 2001-06-12, 18:40
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unstable247 
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Re: a bad idea for all you people to ponder...
yeah thats basically a barium nitrate based flash powder. i bet it burned your fingers good.
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#21
 2001-06-12, 18:59
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GHETTO_SMURF 
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Re: a bad idea for all you people to ponder...
i wanna make my own home rocket....i saw a show on tlc (junkyard wars) latnight and they wer talking about two chemicals that they use in the side boosters for the space shuttle launches...aluminum powder and what?????
------------------ ------------------ ok...if you say so ------------------ for informational purposes only http://spudszilla.cjb.net
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#22
 2001-06-13, 01:27
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unstable247 
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Re: a bad idea for all you people to ponder...
um, im pretty VERY sure that they dont use aluminum powder or any solid fuel for space shuttle launches. i think they either use hyrogen peroxide or hydrazine. the other chemical is almost always oxygen, since fuel needs oxygen to burn, and there is no oxygen in space.
are you sure you dont mean model rockets? i think i might have seen that episode youre talking about.
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#23
 2001-06-13, 15:04
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GHETTO_SMURF 
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Re: a bad idea for all you people to ponder...
yes yes..the model rockets..in junkyard wars..it was a giant tee-pee shped rocket vs. a nice dart shapped rocket...the dart won!
they were using some sorta huge model rockets...but they didn't say what grade they were...could you help?
------------------ ------------------ ok...if you say so ------------------ for informational purposes only http://spudszilla.cjb.net
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#24
 2001-06-13, 19:22
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unstable247 
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Re: a bad idea for all you people to ponder...
i think that they were those really powerful ammonium nitrate + aluminum powder + resin hardener or something. those bitches fly high. check them out at the rocketry section at www.pyrotek.com. hmmm...odd. i just went to pyrotek and the lnk was changed to some heating company. it always used to be the chemical supply store. did anyone else encounter the same problem?
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#25
 2001-06-13, 20:13
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GHETTO_SMURF 
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Re: a bad idea for all you people to ponder...
it's at http://www.pyrotek.org/ not com...yeah..i ran into that too
------------------ ------------------ ok...if you say so ------------------ for informational purposes only http://spudszilla.cjb.net
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#26
 2001-06-15, 17:49
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unstable247 
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Re: a bad idea for all you people to ponder...
yeah thats it. thanks
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#27
 2001-06-24, 11:51
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anthracis 
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Re: a bad idea for all you people to ponder...
Yes unstable it burned my fingers generating some bubbles wich instantaneously 'bursted' but I used a very good traditional recipe to heal them so the next day the burns weren't touch sensitive anymore and a thin red skin covered them.You guys may use sometime that recipe... The oxidiser used for 'boosters'(those two small rockets attached to the liquid propellant rocket engine)is ammonium perchlorate not ammonium nitrate,plus aluminium and some polymer (eg. HTPB or CTPB- hidroxilic/carboxilic terminal polibutadiene or some shit like that).
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#28
 2001-06-25, 01:52
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GHETTO_SMURF 
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Re: a bad idea for all you people to ponder...
is that the 'safe' recipe?
------------------ ------------------ ok...if you say so ------------------ for informational purposes only http://spudszilla.cjb.net
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#29
 2001-06-25, 19:15
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unstable247 
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Re: a bad idea for all you people to ponder...
is what the "safe" recipe?
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#30
 2001-07-01, 20:40
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anthracis 
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Re: a bad idea for all you people to ponder...
It is not ammonium nitrate but ammonium perchlorate and they really use this in boosters as great power is needed for the launch.
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#31
 2001-07-01, 20:50
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anthracis 
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Re: a bad idea for all you people to ponder...
Ignore the above post.It is a mistake. I used a kind of mushroom that grows here.I'll look for the scientific name.It makes some microscopic 'seeds' that look like a brown powder-this powder has good antibiotic and tissue-regenerating properties.It really works!I may send you some by mail if you are good boys...
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#32
 2001-07-02, 21:56
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unstable247 
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Re: a bad idea for all you people to ponder...
whatchu talking bout willis?
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#33
 2001-07-03, 16:57
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anthracis 
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Re: a bad idea for all you people to ponder...
Who is willis? I was talking about the recipe for healing the burns.
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#34
 2001-07-04, 01:09
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unstable247 
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Re: a bad idea for all you people to ponder...
oh, gotcha, i thought you meant thats how you got the ammonium perchlorate.
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#35
 2001-07-04, 19:48
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anthracis 
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Re: a bad idea for all you people to ponder...
No.Perchloric acid is the source...
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#36
 2001-07-05, 18:49
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GHETTO_SMURF 
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Re: a bad idea for all you people to ponder...
i think you lost us both for a minute
------------------ ------------------ ok...if you say so ------------------ for informational purposes only http://spudszilla.cjb.net
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#37
 2001-07-05, 20:09
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anthracis 
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Re: a bad idea for all you people to ponder...
Why?
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