val77 Posted October 31, 2012 Share Posted October 31, 2012 (edited) I have read that magnesium with an oxidant such as nitrates and perchlorates could keep shortlyor I want to keep maximum 1 weekknowing that sodium nitrate is hygroscopic I wanted to know how to avoid the reaction to sodium nitrate/magnalium and to keep the also, how to mix chemicals to flare composition? flash powder method or others ? Edited October 31, 2012 by val77 Link to comment Share on other sites More sharing options...
val77 Posted November 1, 2012 Author Share Posted November 1, 2012 just a tiny up for me Link to comment Share on other sites More sharing options...
AirCowPeacock Posted November 1, 2012 Share Posted November 1, 2012 Mix however you feel comfortable. What composition are you using? Link to comment Share on other sites More sharing options...
val77 Posted November 1, 2012 Author Share Posted November 1, 2012 differents... 60% barium nitrate, 40% mg +2% mineral oil sodium nitrate and do a 50/50 mix with magnalium, barium nitrate 50% magnalium 50% 2% huile minérale KNO3 45MgAl 45Red Gum 5Dextrin 5 Aluminum (20 micron; atomized)....................40Potassium perchlorate (24 micron).................30Barium nitrate (150 micron).......................30 White 25.5% Magnesium 34.5% Potassium Nitrate 34.5% Barium Nitrate 5.5% Binder* Red 29.1% Magnesium 19.4% Potassium Perchlorate 34.0% Strontium Nitrate 14.6% PVC 3.0% Binder* Sodium nitrate - 48 %Magnalium (~80 mesh) - 45%Dextrin - 7 % Link to comment Share on other sites More sharing options...
AirCowPeacock Posted November 1, 2012 Share Posted November 1, 2012 These look alot like flash comps. I would diaper mix them. Ive heard of whistle mix + mineral oil being mixed in an antistatic bag. Link to comment Share on other sites More sharing options...
val77 Posted November 1, 2012 Author Share Posted November 1, 2012 (edited) ok but the ignition is not modified with the mineral oil ? Edited November 1, 2012 by val77 Link to comment Share on other sites More sharing options...
AirCowPeacock Posted November 1, 2012 Share Posted November 1, 2012 I think the mineral oil acts as a lubricant reducing friction conerns. Dont take my word for it. Link to comment Share on other sites More sharing options...
val77 Posted November 1, 2012 Author Share Posted November 1, 2012 ok thanks Aircowpeacock ! Link to comment Share on other sites More sharing options...
dagabu Posted November 1, 2012 Share Posted November 1, 2012 (edited) These look alot like flash comps. I would diaper mix them. Ive heard of whistle mix + mineral oil being mixed in an antistatic bag.ok but the ignition is not modified with the mineral oil ?I think the mineral oil acts as a lubricant reducing friction conerns. Dont take my word for it. Mineral Oil and/or Vaseline are phlegmatizers and modify the burn rate some, allow for much harder fuel grains and protect the grain from humidity to some extent. It also helps keep the fuel grain from cracking when it is 'relaxing' after being pressed. Of course this is only in relation to whistle fuels and I have no idea what it would do with any other comp. -dag Edited November 1, 2012 by dagabu 1 Link to comment Share on other sites More sharing options...
val77 Posted November 1, 2012 Author Share Posted November 1, 2012 thanks dag +1 ! Link to comment Share on other sites More sharing options...
AirCowPeacock Posted November 1, 2012 Share Posted November 1, 2012 I'm aware thats the purpose of the mineral oil, but would it not reduce friction too? I dont think I would normally want to mix whistle in a plastic bag. Link to comment Share on other sites More sharing options...
Mumbles Posted November 1, 2012 Share Posted November 1, 2012 A lot of these flare compositions come from military literature. They tend to use castable resins to make these formulas. I believe polyester was popular for a while. As they've moved on to better formulas, PVDF is becoming a popular one in more current formulas I've seen. Link to comment Share on other sites More sharing options...
Col Posted November 2, 2012 Share Posted November 2, 2012 I'm aware thats the purpose of the mineral oil, but would it not reduce friction too? I dont think I would normally want to mix whistle in a plastic bag.Mixing whistle with a phlegmatizer in a bag is ok as long as its wet, you have more time because the solvent cant evaporate. Link to comment Share on other sites More sharing options...
dagabu Posted November 2, 2012 Share Posted November 2, 2012 (edited) I'm aware thats the purpose of the mineral oil, but would it not reduce friction too? I dont think I would normally want to mix whistle in a plastic bag. Sure, mineral oil was one of the first synthetic engine oils and does a pretty good job of lubricating. Mixing WET whistle in a plastic bag is superior to any other method hands down IMHO. There is no way it can pick up a spark since a static charge can't build up in that environment, the shock hazard is all but eliminated due to the fluid and the flammability is greatly reduced as well. Shortly after I watched a video of 500g of whistle blowing up in a plastic bag and destroying a blast shield, I wanted to test the blast of wet whistle in a bag. The result was a burn of about 1 second and no explosion or percussion. I feel it is much safer to wet mix in a baggy than in the open. -dag Edited November 2, 2012 by dagabu Link to comment Share on other sites More sharing options...
taiwanluthiers Posted November 2, 2012 Share Posted November 2, 2012 500g of whistle blowing up in your face is probably as bad as a stick of dynamite blowing up in your face... I don't think you can survive it. Link to comment Share on other sites More sharing options...
dagabu Posted November 2, 2012 Share Posted November 2, 2012 I agree completely, here is the VIDEO. -dag Link to comment Share on other sites More sharing options...
AirCowPeacock Posted November 3, 2012 Share Posted November 3, 2012 Hey, is this 'self confining' phenomina actually detonation? These seems to be somewhat of a touchy issue in pyrotechnics--if flash dets or not that is. Link to comment Share on other sites More sharing options...
dagabu Posted November 3, 2012 Share Posted November 3, 2012 You will have to ask the HE guys... -dag Link to comment Share on other sites More sharing options...
val77 Posted November 3, 2012 Author Share Posted November 3, 2012 (edited) i have tested a small part of flare composition (2 gramms) with mineral oil perfectly work ! Edited November 3, 2012 by val77 Link to comment Share on other sites More sharing options...
val77 Posted November 3, 2012 Author Share Posted November 3, 2012 you think I can add potassium dichromate for magnesium compositions ? Link to comment Share on other sites More sharing options...
Mumbles Posted November 3, 2012 Share Posted November 3, 2012 Adding dichromate to compositions containing magnalium or magnesium can help in some instances. However, it's no substitute for properly treated magnesium. Because these are all nitrate compositions, you might want to look into coating the Mg with linseed oil. Link to comment Share on other sites More sharing options...
val77 Posted November 3, 2012 Author Share Posted November 3, 2012 yep is sure Link to comment Share on other sites More sharing options...
Potassiumchlorate Posted November 3, 2012 Share Posted November 3, 2012 Sure, just use proper protection. It's very harmful. Link to comment Share on other sites More sharing options...
val77 Posted November 3, 2012 Author Share Posted November 3, 2012 (edited) yes i have a protection glassesand I mix all the time outside home Edited November 3, 2012 by val77 Link to comment Share on other sites More sharing options...
AirCowPeacock Posted November 3, 2012 Share Posted November 3, 2012 You need atleast a dust mask. I use a pretty slick filtering resperator. It cost me 20$. I also mix in my fumehood sometimes--solvent, coldness of outside, not having to wear my resperstor or goggles. You need gloves too. Link to comment Share on other sites More sharing options...
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