Implying they'll blow their hands up. Is that not the way you intended?
As FUD. Ok.
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Highly Reactive Chemicals
People are making igniters from "Highly Reactive Chemicals"?
General, just like when people asked about making rocket propellant and you posted the blowed up hand link? Nothing about it being made safely, or how it can be made safely just, 'you'll shoot your eye out.'
FUD.
Ah, so it could be flash powder, igniter formula, or orange juice. Don't use a metal lid. Could it be the powder chamber on a RMS? Don't fly motors you have to screw threaded metal components together.
Firefox ELV Primer/Pryogen thread. That's igniter material. Sorry to everyone that I initially thought the paint lids were metal. On the other hand the Firefox lids ARE metal so the point is moot.
Acetone is used to re-activate the binder and I have been able to reuse solid ELV. Breaking into pieces first helps speed the process, but you can fill it and leave it for a while (overnight). It will eventually re-dissolve. However, after enough cycles, it doesn't perform as well as it initially did. That's just my observation and could have been something with the wire or another step.
Their PyromagT magnum didn't even fizzle after being reactivated. Have no idea it's composition. I broke it up and mixed with a craft stick (kinda like a big, thick tooth pick, great for non-sparking mixing) and stuck it in the stove burner after it hardened on the stick. A few sparks possibly from a metal flake, but didn't flare like when new.
If you're watching a tv show, you just keep making them. Sometimes people at a launch have a craperhead failure. I would seal them as some did dry out and crack. I had some in the range box that had broken apart, and as they're not conductive anymore,....
I found the resistance changed while they were drying so at the launch site dips may give you different results than ones fully cured (cured, dried?). At the launch site dipping could avoid legal hassles if they are used on site. If you've been skipping the ATF threads, technically "igniters" (which I couldn't find a definition for) are included as explosives.. There are apparently exemptions for those included with exempt motors, but not homemade ones. *If* regulated, in addition to needing an LEUP (and not giving them away), they must be stored in a magazine (yikes you say!), but it's not clear to me if type 4 or type 5. As a practical view, you don't want the heads banging together. It's also a good idea to keep them somewhere dry and safe from ignition sources. Some people keep book matches on the counter and/or stick matches over the stove. Hmmm. I would take the precaution to store them as a flammables and in at least in some sort of lined, metal box. The dip too. However, the "extremely flammable" (as printed on the can) acetone should be given care as well.
Joel. phx
I'm sure there's some links to pictures of houses burned down by people playing with matches, but I'm too tired to look. ;)
I normally make about 15-20 with the primer, let them dry and then coat with the main pyrogen. Those are then stored along with all the other igniters in my range box. I have a few from last December and they still ignite my Ammonium Nitrate EX motors instantly.
EEE!, not cool. Mixing dry chemicals is fine, but in a glass jar? I would mix everything in a plastic yogurt cup or some such first, then transfer it to the glass jar. Seems most of these igniters use KP and metal powders, and those are 2 things I would not want to burn up in a class jar I was holding even if they don't use dark aluminums.
I've also noticed degraded performance after thinning with acetone. I'm going to try thinning the mix with diluted nitrocellulose laquer instead of straight acetone next time. I've got a quart of green colored nitrocellulose laquer that I picked up from Firefox. If that doesn't work I'll try adding a small amount of potassium perchlorate.
I'll have to try that ziplock bag deal. Sounds like a good idea. Thanks!
Have you (or anyone else here) ever tried making your own pyrogen? I'd like to try making my own because the price for a tiny bottle of this stuff is pretty steep. I'm not sure what composition to try though. Maybe some 325 mesh spherical aluminum mixed with potassium perchlorate and nitrocellulose lacquer for the binder?
But seriously, if you want to see some of my latest work (i.e. my first), look at my posts to the Rocketry Online AM/EX forum. I put the results of my first motor test up about two weeks ago, and today I've going to do a second test with an APCP formulation. All the details are on that forum.
I may regret mentioning this, but the Ammonium Nitrate Composite Propellant was developed by John Wickman.
Any one who can't take your statements for what they are, should go visit a burn center or tape their thumb to their palm for a couple days. My brother learned the hard way. Gary Deaver
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