PyroGnome Posted October 20 Posted October 20 On 8/6/2016 at 8:41 AM, Pyrophury said: Bleser recommends priming the white strobe with 1/2mm layer of his strobe igniter, below: #28 Strobe Igniter - Bleser Potassium perchlorate 74 Red gum 12 Charcoal 6 Aluminum dark 3 Potassium dichromate 5 I don't think the potassium dichromate is needed for this to work. I made some 6mm round Bleser white strobe stars with -100 mesh magnalium, primed with the igniter above (without dichromate) - although they seemed to light in the air they appeared to then blow out without strobing at all, on the ground they also struggled to get going and only flashed once or twice. I think 100 mesh magnalium is probably too coarse. Or it has more coarse material in it. I'd suggest trying to raise the KNO3 percentage slowly. With the strontium mixes the military slow strobe tests were able to get it up to 12.5% before it switched to continuous burning, but those are extremely slow in comparison. In round stars and shells Bleser suggests a trying from 100-200 mesh Mg in the NH4ClO4 red, and that it must be atomized or spheroidal to work correctly because the granular is too reactive. Since Mg/Al is basically all granular I'd probably suggest getting some of the -80+200 mesh PCS carries, or assuming you already have 100 maybe grab some 200-325 or -325 since the -325 is used in a lot of color comps and the 200-325 can be used in them and subbing in a few percent of that to even it out a bit. I wouldn't think you'd need more coarse with nitrate strobe stars but the military formulas indicate it doesn't matter much what mesh of Mg/Al is used in this type of low oxidizer formula which is why I mentioned the nitrate first. Guanidine nitrate could be used for the colors, and definitely for white which I think is the first formula I saw that used it in combination with barium nitrate; I posted some of shimizus formulas with it on one of my other threads. On 12/5/2017 at 7:44 AM, pirotek said: Another composition of the strobe star Composition is extracted from Chinese products by Yus Composition: Barium nitrate - 68% MgAl - 23% Bismuth oxide - 17% Binder - 3% That's less a strobe and more like the dragon egg that won't quit giving, but I like it a lot. How large was that / how much comp was it?
soumya57 Posted November 5 Posted November 5 On 12/23/2017 at 9:29 AM, Ubehage said: phenolic resin - Kia ha
Recommended Posts