All10Fingers Posted August 11 Posted August 11 I hope to get started trying some "inserts" in my shells. Im not certain how to do that, but what I've tried is rolling a paper tube, cutting it into short chunks and stuffing them with various star mixtures. So far tests done on the ground I see them shooting pretty colored fire out the back but they don't have the ooomph im going for. Mostly they don't even move from the spot they started. Do I need to mix in some BP? Pack them harder? Add a nozzle? Different formulas? Is my whole approach incorrect? Should I poke a little core in the bottom? I feel it would take more time and recourses than I have available to run a million tests if all the different variables so I'm turning to the experiences of the interwebs
Zumber Posted August 11 Posted August 11 (edited) https://www.skylighter.com/blogs/how-to-make-fireworks/advanced-go-getter-fireworks-stars plus on apc forum there is 207 results here If you search' Go getter' in search box. .....You will find all useful information. Edited August 11 by Zumber
cmjlab Posted August 11 Posted August 11 A spindle to create a core is a good start as it would provide at least some thrust. A star comp with metal fuel in which you replace all or a portion of the often recommended 200 mesh mg/Al with the finest mesh mg/Al (~325 or smaller) you have will drastically improve thrust when combined with a core. It will take some testing / tuning to find the right size core to get the amount of thrust you want, unless you buy a pre-made go getter tooling set - even then it will still require you to tune your formula to match that spindle. Don't forget to fire proof your tubes to avoid flaming trash falling to the ground! Good luck! Charles
cmjlab Posted August 11 Posted August 11 Buell Red comes to mind as a good comp to use for go-getters when using the methods described above. I've never had luck with United Nuclear comps or methods, nor with the liquid process.
All10Fingers Posted August 11 Author Posted August 11 I only have 325 and I chose perchlorate/ metal colored star comps. I'm definitely not trying to spend 100 bux for some less complicated than a stapler. I'll admit the material was only... Finger smushed in there. And the top was just a was of paper without glue. I've seen enough stars zip around in the ground during burn tests I figured it should be simple... But apparently the weight from the paper roll just kills it. It need it "tuned" for anything. As long as it doesn't go straight down after the burst I'll call that a win. One thing I've noticed is that the second half of the burn, they usually will take off for a few feet or spin around for the last 1.5 seconds before burning out. Related side note. I've had good success making rockets with the same comps when mixed with BP, with a core and a nozzle. But that feels like too much work if I wanna make a dozen or more at a time
Zumber Posted August 11 Posted August 11 I had good success with Non colour go getter. take kraft paper tube of 6 to 8 mm ID. 1.5 inch height and cover its one end with Kraft paper tape to prevent ignition from one side. prepare hot BP by ball milling and mix 100 mesh titanium 5 to 10 gram or ferrotitanium per 100 gm of bp. press it in tube and prime it with bp slurry. it give nice swimming effect just like fishes in a river.
cmjlab Posted August 11 Posted August 11 (edited) 6 hours ago, All10Fingers said: I only have 325 and I chose perchlorate/ metal colored star comps. I'm definitely not trying to spend 100 bux for some less complicated than a stapler. I'll admit the material was only... Finger smushed in there. And the top was just a was of paper without glue. I've seen enough stars zip around in the ground during burn tests I figured it should be simple... But apparently the weight from the paper roll just kills it. It need it "tuned" for anything. As long as it doesn't go straight down after the burst I'll call that a win. One thing I've noticed is that the second half of the burn, they usually will take off for a few feet or spin around for the last 1.5 seconds before burning out. Related side note. I've had good success making rockets with the same comps when mixed with BP, with a core and a nozzle. But that feels like too much work if I wanna make a dozen or more You can make a core with a nail that will work just fine, it may or may not work with the metal or comp you have. Nails are cheap though. 325 is plenty small enough so no money spent there since you say you already have it. You don't have to tune it, it was a suggestion, but your time doesn't cost you anything. And if all you're looking for is for it not to go down after you break the shell, you're in luck - they don't need to be go-getters for that. Edited August 11 by cmjlab
All10Fingers Posted August 12 Author Posted August 12 Thanks guys that's much more useful. I'm much better at following directions or a list than creating novel ideas... More of a musician than a composer. I was hoping for a recipe I could amend a bit rather than trying to start from square one. I'm now leaning towards ruby red and it's green counter part. And hopefully something similar in a blue I mentioned it in a video that failed to upload... My bad
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