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Unread postAuthor: BC Pneumatics » Mon Jun 04, 2007 7:21 am

SpudBlaster15 wrote:Yesterday I attempted to make an airsoft grenade, but I underestimated the power of flash powder and ended up blowing half of a tree apart.


Are you a freakin moron?
NO flash powder, especially in something for AIRSOFT.
And if you don't even know the power of it, why the HELL are you playing with it?
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Unread postAuthor: Fnord » Mon Jun 04, 2007 8:49 am

Ive been working on a few things occasionally.
I have an unfinished wimshurst generator sitting on my porch.
I've gathered most of the parts necessary to make a co2 laser. If anyone has a zinc selenide HR or a 95% reflective OC lens for sale pm me.
I'm making a hand-forged sword currently. I have the blade mostly done, it still needs tempered and ground down a bit. I'm going to try to cast an aluminum hilt for it also.
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Unread postAuthor: SpudBlaster15 » Mon Jun 04, 2007 2:47 pm

BC Pneumatics wrote:
SpudBlaster15 wrote:Yesterday I attempted to make an airsoft grenade, but I underestimated the power of flash powder and ended up blowing half of a tree apart.


Are you a freakin moron?
NO flash powder, especially in something for AIRSOFT.
And if you don't even know the power of it, why the HELL are you playing with it?


I am quite sure that everyone underestimated the power of flash prior to using it in any sort of decent confinement.

I only used 1 gram of KNO3/Mg flash, which is why I was surprised when it blew half of a tree apart.

I don't even play airsoft, the device I constructed was actually built with the intention of testing flash powder's ability to spread airsoft BBs.
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Unread postAuthor: BC Pneumatics » Mon Jun 04, 2007 3:26 pm

Perhaps you would be better of keeping your assumptions to yourself. Anyone that does adequate research before making flash powder will be fully prepared for it's power.

Mentioning you don't play airsoft is even more concerning, since it morphs this from 'terrible game play idea' to 'IED experimentation' as far as I can tell.
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Unread postAuthor: SpudBlaster15 » Mon Jun 04, 2007 3:34 pm

I researched for 3 months before I even touched flash, and I was not prepared for the power output in small quantities. Anyone who is honest will state the same, unless they have witnessed previous flash powder demonstrations.

Perhaps it was IED experimentation, and in that case, I do it all the time. They key here being that it is non lethal given responsible handling, and is not intended to do property or personal damage.
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Unread postAuthor: BC Pneumatics » Mon Jun 04, 2007 3:47 pm

The first time I ignited a sample of flash powder (a composition of ~2.2km/s) in any quantity above .50g, I was actually surprised by the lack of power compared to what I was expecting.

Discussion of IED's is not permitted on this board, regardless of you intents.

I guess all we can do is thank God that you aren't playing with any of the big boys.
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Unread postAuthor: iPaintball » Mon Jun 04, 2007 3:59 pm

BC, my mom's cousin is a pyrotechnition, and he made a sample of FP using magnalium and perchlorate in a 50:50 ratio. He only made about an ounce, but when e set the stuff off, unconfined, it sounded like a well confined 10g aluminum/perchlorate salute. There's a video on youtube of a guy setting off a 25mg sample, and it sounded like a firecracker!
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Unread postAuthor: SpudBlaster15 » Mon Jun 04, 2007 4:53 pm

BC Pneumatics wrote:The first time I ignited a sample of flash powder (a composition of ~2.2km/s) in any quantity above .50g, I was actually surprised by the lack of power compared to what I was expecting.

Discussion of IED's is not permitted on this board, regardless of you intents.

I guess all we can do is thank God that you aren't playing with any of the big boys.


Your flash must have sucked. When I use 600 mesh magnesium powder along with 600 mesh KNO3, half a gram, when placed in the bottom of a styrofoam cup with only a piece of cardboard over the top, will produce an ear shattering report, and completely destroy the cup.

What, by your definition, constitutes an IED?

After making and using flash powder, I wasn't terribly surprised that a pen cap packed full of AP could split a piece of 1/2" plywood in half.

To assume that I do not know what I am doing when the matter concerns pyrotechnics and explosives is to be extremely ignorant.
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Unread postAuthor: BC Pneumatics » Mon Jun 04, 2007 5:05 pm

You assume mine 'sucked'? It was in the 2.2km/s vicinity, which I can assure you is higher than your KNO3/Mg mixture.
I don't know how ou can make an assumption like this, perhaps I am just not as giddy over explosives as you are? I don't get very excited over relatively small bangs. (Yes, sorry to break your heart, flash powder is a small bang)

Any explosive device you are making with FP, by the government's definition, not my own, will land you in serious crap for being an IDE.

The mere thought of you using peroxides, especially ones so prone to form fairly dangerous monomers, is disturbing. MEKP is a much safer alternative, and people on the strictly chemical side of things seem to prefer even nitroglycerin for stability and safety.

Da Pneu Kid, not sure what you are getting at, but an oz is more than twice the size of a 10g salute, and both mixes you mention are more powerful than what spudblaster here is talking about. I'm not sure of your point...


I'm not saying Flash Powder is weak, I am just calling SpudBlaster a dumbass. Let's all keep things clear.
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Unread postAuthor: iPaintball » Mon Jun 04, 2007 5:16 pm

Srry, I meant to say gram. The mix he made was ridiculously more powerful than regular Al/KClO4 powder. I meant that unconfined, a sample of MgAl/KClO4 is as loud as a 10g AL/KClO4 salute. Srry about the mistake.
And I also meant that the weak FP he was using was nothing compared to this.
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Last edited by iPaintball on Mon Jun 04, 2007 5:24 pm, edited 1 time in total.
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Unread postAuthor: SpudBlaster15 » Mon Jun 04, 2007 5:20 pm

BC Pneumatics wrote:You assume mine 'sucked'? It was in the 2.2km/s vicinity, which I can assure you is higher than your KNO3/Mg mixture.


And you measured the deflagration velocity how?

I don't know how ou can make an assumption like this, perhaps I am just not as giddy over explosives as you are? I don't get very excited over relatively small bangs. (Yes, sorry to break your heart, flash powder is a small bang)


I do enjoy watching relatively small explosions.

Flash powder usually produces a small explosion, until you start to increase the quantities to the point of several hundred grams. Even then, it does not compare to several kilograms of APAN boosted ANFO detonated by an HMTD cap.

Any explosive device you are making with FP, by the government's definition, not my own, will land you in serious crap for being an IDE.


Maybe where you live. Laws and regulations are different in Canada.

The mere thought of you using peroxides, especially ones so prone to form fairly dangerous monomers, is disturbing. MEKP is a much safer alternative, and people on the strictly chemical side of things seem to prefer even nitroglycerin for stability and safety.


Why would it be disturbing? I can assure you that I know at least as much as you do about the chemical properties and safe handling of organic peroxides.

Monomeric AP, and even dimeric AP does not form in significant quantities when the synthesis is done properly.

I don't make MEKP because I do not have a good source of pure MEK, and I find it cumbersome to transport and use, being a liquid and all. I generally use HMTD, as it is marginally more stable than the trimeric form of AP.

I'm not saying Flash Powder is weak, I am just calling SpudBlaster a dumbass. Let's all keep things clear.


Don't be so presumptuous.
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Unread postAuthor: BC Pneumatics » Mon Jun 04, 2007 5:53 pm

And you measured the deflagration velocity how?

2.2km/s is far from deflagration. This is the accepted value for the composition I used.


I do enjoy watching relatively small explosions.

I guess I assumed you were beyond this point. My mistake.


Flash powder usually produces a small explosion, until you start to increase the quantities to the point of several hundred grams. Even then, it does not compare to several kilograms of APAN boosted ANFO detonated by an HMTD cap.

For once we agree.



Maybe where you live. Laws and regulations are different in Canada.

Walk in and slap one of your little toys on the desk of the nearest LEO. See what happens ;)


Why would it be disturbing?

Anytime I cannot verify, and have reason to suspect someone isn't trained in a field such as this, I get a disturbing feeling. Can't be helped.


I can assure you that I know at least as much as you do about the chemical properties and safe handling of organic peroxides.

To criticize me for assuming the level of your knowledge, and then making assumptions about mine is very hypocritical of you. Tsk Tsk.


Monomeric AP, and even dimeric AP does not form in significant quantities when the synthesis is done properly.

Even then, it is a stupid risk to take when there are much safer alternatives out there.


I don't make MEKP because I do not have a good source of pure MEK, and I find it cumbersome to transport and use, being a liquid and all. I generally use HMTD, as it is marginally more stable than the trimeric form of AP.

HMTD's relatively short shelf life is another big advantage, as no one wants HE's laying around. :roll:


Don't be so presumptuous.

I maintain the right to presume whatever I please, at my own risk. :D
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Unread postAuthor: gotbass7 » Fri Jun 08, 2007 9:38 pm

made a wrist rocket, a hovercraft, and im working on a pedaling soap box. my parents say im only allowed on the comp for 1 hour during the weekend and then never agin till the end of school. which is only another week.
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Unread postAuthor: iknowmy3tables » Sat Jun 09, 2007 11:06 am

I've made many things
I'm still working on my hovercraft, I like balistic stuff I've made many crossbow things for pencils, I used to do incredible powerpoints that astonished classmates and teachers, not just flipbook stuff, but even games, scence selection. I once ran a buissnes in summer camp making stoneage weapons, it was sucsessful the first time around then customers lost intrest. I once got a little into ruberband guns I made my own invention for a fully-automatic-moterless-crankless-rubberband-gun mechanizm I wanted to get a patent but those are dificult and expensive to get. I studied small arms a lot and designed some as well knowing I'll probably never make them, then I retuned to spudguns where I can build my ideas.
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Unread postAuthor: Specialist » Sat Jun 09, 2007 11:44 am

ive been working on a rc hovercraft and still working on m normal sized hovercraft. i also build tons of balloon guns and balloon gun rifles. and i like to work on dirtbikes.
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