asilentbob Posted June 30, 2006 Posted June 30, 2006 I'll cross match it some how, im just wondering if flying fish/falling leaves fuse takes fire easily without priming, i havn't yet found a site that says it does or doesn't.
hst45 Posted June 30, 2006 Posted June 30, 2006 asilentbob, flying fish DO take fire very well without priming. For small backyard displays I've made a shit-load of 3/4" shells using various Flying Fish. CHRISTMAS: 1/4" pcs made from half and half red and greenDRAGON EGG: 1/8" pcs of crackling fuseCOLOR CHANGE: Your choice, half color #1 cut to 1/8", half color #2 cut to 1/2"YELLOW RAIN: half crackling cut 1/8", half yellow cut 3/4" Cut them with scissors diagonally, load a small cardboard tube, and fill with fff BP (the crap left over from corning good lift powder.) Skylighter has some new colors in stock; red crackling, green crackling, etc. It's overpriced, but I'm hooked. I've had the same problem with blackmatch over the years. I make a great, black, stiff blackmatch, and after a while it ends up grey and not as stiff. (i hate it when my fuse won't stay stiff!) You've got to keep it in low humidity, or the KNO3 crystalyzes out. Happy 4th.
asilentbob Posted July 1, 2006 Posted July 1, 2006 Thanks hst45! Yeah i have the crackling and yellow flying fish right now, i just havn't actually used them in a shell.
_DB_ Posted July 1, 2006 Posted July 1, 2006 When I was launching dummy shells I fused one with time fuse just to see if it would ignite as is. That is, not priming it or anything. It actually lit and completely burnt, just like it is suppose to. On another note, I bought a Sony DCR-HC26 digital Handycam camcorder today that records on little tapes called Mini-DVs. I'm not sure if I like it or not yet. The included software absolutely sucks and when I upload videos from the camera on to my computer the audio is almost non-existant. Hopefully I'm just doing something wrong and the camera doesn't suck like it seems to right now. I was wanting a JVC hard drive camera but I wasn't about to dish out $600.00! Maybe I should have........
justanotherpyro Posted July 1, 2006 Posted July 1, 2006 An easy method I use to keep my black match dry is I took a dixie cup and duct taped it really good as a plug inside of an empty wraping paper tube, and then the other cap is another dixie cup that is hand pressed into it. It has kept it plenty dry for months in this strange humidity we have been having.
aquaman Posted July 1, 2006 Posted July 1, 2006 Ok I'm in a little pickle. I made a few stars for some roman candles a couple of days ago and I can't get them to light. It's not that the star itself isn't igniting it's almost as if they're blown blind. I used to be able to launch the stars with .2g of lift (benzolift) but now that is like way to much for some reason. I made the stars a little longer for a longer burn time, that last batch and I think that has to do with something. I've tried .2g, .1g, .0g (a pinch) and it all seems like it is too much lift. I've also tried mixing the lift 30% bezolift and 60% BP powder but with that I need about .7g and I'm trying to stay in the .2g-.3g range. The stars slide in easy and I've tried multiple tubes. I'm just tired and ran out of ideas. Any ideas?
Rogue Chemist Posted July 1, 2006 Posted July 1, 2006 Could the increased length have caused slightly larger diameter stars? Or even not completly linear? The increased pessure needed to eject the stars could blow them blind.
Swany Posted July 1, 2006 Posted July 1, 2006 Prime 'em with a paste of benzolift/BP on the side that they are to be ignited, should do it. What composition are you using?
aquaman Posted July 1, 2006 Posted July 1, 2006 Rogue- The stars I made slide in the tube by themselves, thats what I can't figure out they shoot out like super fast with a loud bang and no star seen. There is barely any friction. The stars are cylinder like. Swany- I still think they're being blown blind but I guess if I can get them to light after almost being blown blind then they will be super high. I will try to repaste a couple to see if it will work. The benzolift I used was: 48.28% 14 Potassium Perchlorate 20.69% 6 Sodium Benzoate 27.59% 8 Meal 3.45% 1 Dextrin Edit: I think I will try a 1/2" tube tonight to see if that helped. I made my stars for a 3/8" but the 1/2" should give it more room. I wish I would of thought of that last night. Edit2: They now work. I tried them last night and they all worked. I tried a 3 shot roman candle but the stars are to small so I added another layer of BP prime on them and made 16 8" long tubes (1/2" ID) last night.
Dr.Bodgy Posted July 3, 2006 Posted July 3, 2006 Hey all, I am back sort of, I have been away from the game for a while, I will probably do a lot of reading over the next few weeks to catch back up again. Any changes to the site at all?Cheers People.
lacrima97 Posted July 4, 2006 Posted July 4, 2006 How come shimizu says that a 70 KclO4 : 27 Al fine flake : 3 Sulfur composition detonates at 867m/s at a density of 0.62g/ml? Everyone swears that flash is an LE but he states its an HE. ??? It's on pg. 44 of The Art Science and Technique. Who is right?
Swany Posted July 4, 2006 Posted July 4, 2006 Can be detonated, just like about anything. It is defined as an HE, but in salutes it doesn't detonate, at least as far as I know. To be considered an HE it has to detonate faster than the speed of sound through the substance.
lacrima97 Posted July 4, 2006 Posted July 4, 2006 Can be detonated, just like about anything. It is defined as an HE, but in salutes it doesn't detonate, at least as far as I know. To be considered an HE it has to detonate faster than the speed of sound through the substance. Shimizu says that it detonates from electrical ignitor in the situations that were mentioned above. If it doesn't detonate in a salute, how else would it detonate?
_DB_ Posted July 4, 2006 Posted July 4, 2006 I was thinking that it would be cool to have a little pumpkin carving contest when this Halloween rolls around. I don't know why... I just get really ethusiastic about carving during that time. I can show off some of my work that I produced this Halloween. I came up with the design and free-handed it. Those little kits with stencils are for cheaters anyway. Before At night It was a pretty simple design, but it really looked mean at night! The non-American forum goers might not like this ideal.....
maximusg Posted July 4, 2006 Posted July 4, 2006 Can be detonated, just like about anything. It is defined as an HE, but in salutes it doesn't detonate, at least as far as I know. To be considered an HE it has to detonate faster than the speed of sound through the substance.Shimizu says that it detonates from electrical ignitor in the situations that were mentioned above. If it doesn't detonate in a salute, how else would it detonate? With a detonator
justanotherpyro Posted July 4, 2006 Posted July 4, 2006 I havn't heard of flash being detonated by a detonator. Flash is right there in the middle realm. It deflagrates very very fast and almost hits the speed that is classified as "detonation". Flash is deflagration to detonation if anything.
ULTRABUF Posted July 4, 2006 Posted July 4, 2006 Happy 4th of July everyone! I hope everybody has fun and plays it safe.
BigBang Posted July 4, 2006 Posted July 4, 2006 Sorry haven't been around. I'll talk more when I get to my own computer. Hope everyone has a happy 4th of July.
lacrima97 Posted July 4, 2006 Posted July 4, 2006 Can be detonated, just like about anything. It is defined as an HE, but in salutes it doesn't detonate, at least as far as I know. To be considered an HE it has to detonate faster than the speed of sound through the substance.Shimizu says that it detonates from electrical ignitor in the situations that were mentioned above. If it doesn't detonate in a salute, how else would it detonate? With a detonator A detonator is not an electrical ignitor.
Boomer Posted July 5, 2006 Posted July 5, 2006 Won't make a freakin' difference whether it detonates or just burns really fast. The fight about this is moot. If you calculate the CJ pressure for loose flash, you end up with about the static pressure of black powder. So any destructive effect will only come from the hot gas expanding, no real shock wave here caused by the det front hitting the target. In other words, even with equal (more?) total energy, it has under 1% the brisance of RDX (<3 kbar vs. 335 kbar).
Guest pyrokid00000 Posted July 5, 2006 Posted July 5, 2006 The 4th rocked i had all together 96 shells, including 3 5" salutes. Boy did they ever rock the ground.
Swany Posted July 5, 2006 Posted July 5, 2006 Won't make a freakin' difference whether it detonates or just burns really fast. The fight about this is moot. If you calculate the CJ pressure for loose flash, you end up with about the static pressure of black powder. So any destructive effect will only come from the hot gas expanding, no real shock wave here caused by the det front hitting the target. In other words, even with equal (more?) total energy, it has under 1% the brisance of RDX (<3 kbar vs. 335 kbar). Thank you, Boomer! Water and aluminum could -in theory- be detonated and produce roughly 3 times as much energy than TNT, but what would brisance be, and how would the reaction be initiated? That was tangent, but I thought it interesting. Axt's H2O2/Al mixes showed surprising brisance when compared to MEKP/AN and such, although they are hardly brisant... still, interesting. And in other news, Your signature may be the coolest, most politically incorrect, clever, and such that I have seen in a while.
DeAdFX Posted July 6, 2006 Posted July 6, 2006 Oxyclean makes a surprisingly good oxidizer for magnesium. .. I blinded myself
d4j0n Posted July 7, 2006 Posted July 7, 2006 I'm interested in making sprite bombs. Anyone have any idea of how to make them?
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