Chunn7704 Posted January 25, 2016 Share Posted January 25, 2016 Hey guys just curious on how the display fireworks have that deep boom when they break. Im pretty new at this but ive shot plenty of 3" ball shells with Bp and 70/30 booster about 2.4 grams. Mine deff dont make the boom, more of a crack sound. Is it because of the size difference in the display fireworks compared to mine. Just curious. i love that deep sound Link to comment Share on other sites More sharing options...
lloyd Posted January 25, 2016 Share Posted January 25, 2016 (edited) Heh! Chunn, a 3" shell IS "display fireworks". In fact, if you're not licensed, anything you make right down to a sparkler is "Fireworks, NOS" (not otherwise specified). You can't make "class-C" (UN0336), because that's a DOT shipping category for approved goods carrying an EX number. <G> ANYway... 3" display shells do make more of a crack than a boom. When you work up to 6" and greater sizes, you'll get that gut-thumping low tone you're looking for. LLoyd Edited January 25, 2016 by lloyd Link to comment Share on other sites More sharing options...
Chunn7704 Posted January 25, 2016 Author Share Posted January 25, 2016 Very interesting guess i wasnt aware of that. i just looked up on how to obtain a licence and holy crap!!! They wana know ur shoe size. Also it says suffiecient training has to be done. do u know anything about this. the class is like 2000 dallors. Link to comment Share on other sites More sharing options...
lloyd Posted January 25, 2016 Share Posted January 25, 2016 There's no class required for a Federal Explosives license... just a fee, an application, and a fairly lengthy wait. You must mean La's license. You'll have to talk to other Louisiana amateurs to get that figured out. Lloyd Link to comment Share on other sites More sharing options...
Chunn7704 Posted January 25, 2016 Author Share Posted January 25, 2016 Thank you ill do some more research Link to comment Share on other sites More sharing options...
rogeryermaw Posted January 26, 2016 Share Posted January 26, 2016 Also involved in that beautiful sound is the distance from which it is heard. Air is not the best medium through which to transmit energy or waves. Some of the sound of the larger fireworks is muffled on the way to your ears and much muddling and reverberation of the pure original sound waves occurs as well. Link to comment Share on other sites More sharing options...
OldMarine Posted January 27, 2016 Share Posted January 27, 2016 I live about a mile from the fairgrounds and when they do the holiday displays I get the deep rumbles that you sort of feel more than hear. I love to watch the kids as they see the flash of the shell then brace for the boom. Link to comment Share on other sites More sharing options...
Chunn7704 Posted January 28, 2016 Author Share Posted January 28, 2016 haha yea i want to make some of those good ones. Link to comment Share on other sites More sharing options...
Chunn7704 Posted January 28, 2016 Author Share Posted January 28, 2016 i know my luck though so im not brave enough to attempt those yet. i could just see the 8" shell going up 10 foot and landing on the ground. yea that wouldnt be cool. 2 Link to comment Share on other sites More sharing options...
rogeryermaw Posted January 30, 2016 Share Posted January 30, 2016 Many people have experienced a round trip or two...I have. I know it's no laughing matter, but after I know no one is hurt or burned, that's always how I respond. I've had a 3" shell full of nitrate green stars go off 15 feet away from me. It looked amazingly cool but in the moment, I was terrified someone could be hurt and trying to put some distance between me and the shell. There are several things that go into that perfect break at apex and any fault in the chain, at best, results in a lackluster shell and at worst, could hurt someone or wreck property. Give proper attention to all the details, large and small, and you will not only have great performing shells, but your results will be repeatable. Link to comment Share on other sites More sharing options...
Arthur Posted January 30, 2016 Share Posted January 30, 2016 Smaller shells need a booster in the break, this makes the break faster and makes the sound sharper. Bigger shells don't use booster and have a lower thud more characteristic of BP alone. Link to comment Share on other sites More sharing options...
zombiesDONTwipe Posted March 15, 2016 Share Posted March 15, 2016 What booster should I use for smaller shells? I've seen people use whistle mix and flash powder, but what other options are there? Thanks for a response, Zach Link to comment Share on other sites More sharing options...
schroedinger Posted March 15, 2016 Share Posted March 15, 2016 For booster, like you allready mentioned whistle and flash can be used as booster. Not much more. But you can use other stronger break charges. Link to comment Share on other sites More sharing options...
zombiesDONTwipe Posted March 15, 2016 Share Posted March 15, 2016 Thanks! I think I'll start out using flash, it seems a little more forgiving than whistle mix. Link to comment Share on other sites More sharing options...
schroedinger Posted March 15, 2016 Share Posted March 15, 2016 Not really. Link to comment Share on other sites More sharing options...
wildcherryxoxo Posted March 16, 2016 Share Posted March 16, 2016 Care to elaborate on that, Shroedingus? Flash is waaaay more forgiving than whistle mix. Firstly, the principle fuels in whistle mix tend to be very difficult to mill (and they need to be VERY fine), they are hygroscopic, and they dont flow well through a screen. Whistle needs to be well incorporated, which adds to the open danger of the mix (because of the amount of handling it takes). If you opt for the wet combined method, then you add process time, and volatile solvents. Flash on the other hand, isnt particular about the fuel particle size (excepting the extremes), isnt hygroscopic, flows well through a screen, and doesnt need to be intimately mixed (binary method anyone?) Link to comment Share on other sites More sharing options...
Seymour Posted April 6, 2016 Share Posted April 6, 2016 I'll agree that flash is easier to make than whistle, but I think that it's more important to discuss the danger than the ease of manufacture. Both Whistle and Flash come in a range of varieties, with a range of levels of risk, but I do not think it is true that either of them is much more forgiving than the other when it comes to safety. I feel it's better to stress that both are very dangerous than to put too much effort in to deciding how much safer one is compared to the other. Not that discussing the differences is a bad thing, I would caution against accidentally implying that the risk may be lower than it is. 1 Link to comment Share on other sites More sharing options...
Bcorso85 Posted July 15, 2016 Share Posted July 15, 2016 The sound of a 5 inch shell breaking four hundred feet high, and the sound of a 5 landing on the ground 100 feet away as it explodes on impact, are very different from each other. High up its more like the thud you are talking about. Much closer, trust me the sound is very different. This happened to me two weeks ago on a show. Link to comment Share on other sites More sharing options...
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