Mumbles Posted January 16, 2007 Posted January 16, 2007 End of January is the close. There are judges selected. It was chosen so people could get back from holidays, and get their vids and what not uploaded.
DeAdFX Posted January 22, 2007 Posted January 22, 2007 Random thought... While I was reading some articles about Ammonium Nitrate propellants I learned that they burned pretty cool compared to the perchlorate variants. Is it possible that Ammonium Nitrate could make a superior blue colored flame compared to Perchlorate blues? I wish I had some PVC powder so I could test this theory but alas AMmonium Perchlorate is my only Cl2 donor... bah.
Mumbles Posted January 22, 2007 Posted January 22, 2007 It's a possibility. However, you would most definatly have to use a non-aqueous binder and something that also had a waterproofing property. NC and Shellac come to mind. If you don't, the AN will absorb water and render the stars useless within a few days. Keeping in a drying box, or in a sealed container is another precaution. I know I have seen some blue composite propellants. I am not sure however what the oxidiser was. I suppose it would be possible to mix up a standard batch of propellant and just cut it into stars. Might even get a go getter effect. I know firefox sells a book on composite stars, as well as one on composite smokes.
optimus Posted January 24, 2007 Posted January 24, 2007 Just been watching a news bulletin about the attempted bombing of the London underground... Apparently, the explosives were made from chapatti flour and hydrogen peroxide, chapatti flour being the main ingredient (I couldn't help laughing when I heard this!) Why would anyone use chapatti flour in an explosive? Is it even feasable? Also, can anyone recommend a (freeware or functioning shareware) programme to re-encode video at a lower bitrate? I have a few vids to enter into the competitions, but they're currently >50mb in size...
Mumbles Posted January 24, 2007 Posted January 24, 2007 I suppose a mix of chapati flour and H2O2 would theoretically be possible if the hydrogen peroxide was concentrated enough. Essentially it just balances out the oxygen balance, letting the H2O2 detonate easier. I imagine it would require quite a starting charge. Essentially it works on the same concept as KNO3/NM. Believe it or not, but the KNO3 does not detonate.
h0lx Posted January 24, 2007 Posted January 24, 2007 This shows, how the news copy the info from eachother without knowing the context they copy, there is a thread on scimadness about some other news, which said it was H2O2, Acetone, chapati flour and HCl.
Dr. Hextromeister Posted January 27, 2007 Posted January 27, 2007 http://search.ebay.co.uk/search/search.dll...=&Submit=Search Looks like KNO3 has been taken off ebay UK again. Only last week there were about 20 listings of sellers offering kgs.
DeAdFX Posted January 28, 2007 Posted January 28, 2007 Man... I wish my math teacher didn't assign so much homework before the weekened. bah
pa_pyro Posted January 29, 2007 Posted January 29, 2007 http://rotteneggs.com/r3/show/se/198565.html My jaw just about dropped when I saw this, someone who actually has a clue on RE and is trying to knock some sense into the kewls. If phillydude is from this forum(if not get someone with a RE account to pm him) we should give him more project ideas to post.(might actually prevent some younger misguided people from turning into kewls.)
Mumbles Posted January 29, 2007 Posted January 29, 2007 He may be a member here under a different name. I tried to put some sense into some people there and on bombshock for a few months but it was useless. For every person I helped get on the right track, there were 3 more suggesting completely unsafe and generally kewl ideas.
DeAdFX Posted January 29, 2007 Posted January 29, 2007 Expensive way of producing fine particles of green Chromimum oxide(I think its the third Oxidization state that is green...) Anywho I burned a mixture of: 15% glycine 15% Ammonium Dichromate70% Ammonium Nitrate Green "snakes" came out of the burning pile of pyrotechnic compistion. The snakes could be easily destroyed by curshing them between your fingers. Be careful as your fingers will be stained green. I never bothered to use the snakes in a thermite reaction as it would have been rather troublesom. I was hoping the fire would have been a little more impressive but whatever... I hear that nano meter sized particles of metal oxides can be produced by combusting Glycine with the corresponding metal nitrate salt in water(solution must be heated to ~200+C ofr that to happen)... I guess this could explain why I got fine particles of Cr2O3. I doubt they were below 1um though.
Dr. Hextromeister Posted January 29, 2007 Posted January 29, 2007 And the KNO3 comes rolling back in! http://search.ebay.co.uk/search/search.dll...=&Submit=Search
DeAdFX Posted January 31, 2007 Posted January 31, 2007 Bah why does Barium Chlorate have to be so troublesome to produce... and why does Ammonium Chlorate have to be so unstable or why couldn't barium perchlorate be less hydroscopic.... sigh..
itwasntme Posted January 31, 2007 Posted January 31, 2007 okay, I got a few questions on some chems from eBay. First off is this "625 mesh" spherical aluminum. I will get it from here http://cgi.ebay.com/Aluminum-Powder-1LB-62...1QQcmdZViewItemI don't want it to be for flash, mostly hot burning primes, fuse comps, stars, and white fires. If it makes pretty white flashes in open air, well that is good too. I was told it actually WAS 625 mesh, and he had a pharmacist use a microscope to check it. What is your opinion on this stuff? The next product is: http://cgi.ebay.com/Magnesium-metal-FLAKE-...1QQcmdZViewItemor http://cgi.ebay.com/Magnesium-metal-SAW-FI...1QQcmdZViewItem Does anyone here think this would be good for white flashes, NOT flash powder. I am not interested in that sort of stuff, yet :-p. Or possibly for sparks in stars, or fuses? Thanks!
DeAdFX Posted January 31, 2007 Posted January 31, 2007 Hmm... I find that fine powder america and the other seller of atomized aluminums to be good. Except though you have to buy in rather large quanitities. THe magnesium should work out for your intentions. I used Mg strips and it worked out ok for a blinding white fire. Bah I wonder if it would be possible to find a local supplier of Ammonium/Potassium Perchlorate that woild be willing to sell to individuals... sigh
Mumbles Posted January 31, 2007 Posted January 31, 2007 Probably the closest thing to a local supplier you'd get for anywhere near acceptable price would be a local fireworks club. Going to a PGI and stocking up works too. You can find some real goodies in there. I picked up some Antimony Trisulfide for $7 a pound, and Swiss Barium Chlorate for $8 a pound. Flat quickmatch for $15 per 163 feet.
DeAdFX Posted January 31, 2007 Posted January 31, 2007 Thats not to shabby for Sb2S3. One of the ebay suppliers of pyrotechnic chemicals lives in the same state as me. I could give that a try. I doubt his/her local prices are any better compared against his/her ebay stuff and the usual pyro suppliers.
asilentbob Posted January 31, 2007 Posted January 31, 2007 Reminds me.I havn't gotten a reply yet from the PGI... ... I want my wallet card...
Mumbles Posted January 31, 2007 Posted January 31, 2007 They ship out in batches. I think it took about a month to get mine. I need to send my renewal in before they bump the price on me.
jacob Posted January 31, 2007 Posted January 31, 2007 does any one know if the bag numbers 13.5-0-45 are useable kno3,i found a supplier that sells it for $15.50 per 50 lbs. i think i read somewere that the numbers are close to that
50caliber Posted January 31, 2007 Posted January 31, 2007 does any one know if the bag numbers 13.5-0-45 are useable kno3,i found a supplier that sells it for $15.50 per 50 lbs. i think i read somewere that the numbers are close to thatThat will work fine, my bags says 13.5-0-46.2 so its close enough
optimus Posted February 1, 2007 Posted February 1, 2007 Looks like the owners of kno3.com have finally got what was coming to them : ) http://news.bbc.co.uk/1/hi/scotland/taysid...ral/6316433.stm http://www.thesop.org/index.php?id=4164 I say good riddance.
vongeetch Posted February 1, 2007 Posted February 1, 2007 I agree with you optimus. That shit (meth) is everywhere around the states, but 20 years max. Bullshit, give them life for the lives they helped to destroy around the world!--vongeetch--
Mardec Posted February 1, 2007 Posted February 1, 2007 Looks like the owners of kno3.com have finally got what was coming to them : ) http://news.bbc.co.uk/1/hi/scotland/taysid...ral/6316433.stm http://www.thesop.org/index.php?id=4164 I say good riddance. Haha good news, those kno3 assfuckers once made me pay like 75$ for some crap alu powder some Fe203 and some flowers of sulpher. Idd good riddance.
asilentbob Posted February 4, 2007 Posted February 4, 2007 I finally got my PGI stuff! Tis indeed a happy day!!! Superbowl is tomorrow... im not a football guy... i don't even know who is playing or when the game actually starts... yeah... but i might be taking some of my... Sweet "Pillage a Village" Mead ... I thought it was an appropriate name.
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