Zumber Posted April 6 Posted April 6 (edited) Hi friends..!! I found this reel on facebook when I was spending time. It turned my head to spin around, what actually he is doing? drilling hole in live star??? sounds totally unsafe and dangerous?Anyone have an idea of what kind of star effect he is trying to produce? It uses same theory just like core burning rocket to produce rapid thrust that might cause stars to swim when ignited unevenly ( more towards hole and less to opposite end). Please discuss your opinion. Thank you FDownloader.Net_AQOgjqUl5NhFHRjm_COibzaz5e_9YkN15cPkRHlmPTTaG6zb1a3L7sERgygU0_k3wswmWmFHNWVMTzovA5t2MaX3_720p_(HD).mp4 Edited April 6 by Zumber Spelling typo error
Carbon796 Posted April 6 Posted April 6 Jetting stars. The white outer layer you see is usually clay. That is rolled on, to inhibit the outer circumference. Swimming stars, iirc, are usually cylindrical with an off center core.
Zumber Posted April 6 Author Posted April 6 You mean it uses cylindrical stars and it is surrounded by clay? And hole is drillied in cylindrical star core? What about drilling safety concerns in live star drilling? Thank you for response.
Carbon796 Posted April 6 Posted April 6 (edited) Cylindrical swimming stars. Can be made in small machine wound tube's like " more traditional " go-getters or zips. Clay is what was traditionally used, for round rolled jetting stars. There should always be some concern when working with a live comp. Regardless of the type of process. But obviously drilling in to a live comp has increased risks. It shouldn't be done in a sensitive comp. The drill speed should be kept as low as practical. And only sharp fresh drill bits should be used. With no dwelling or delay. Any comps with large coarse Ti or FeTi should be avoided. The tip of the drill bit needs to be checked for heat. After drilling. To help gage your safety. I used to hand " drill " all of my all of my spolettes. For precise/precision timing. ( probably hundreds of spolettes ) And, once even chucked some 4" glitter comets, up in the lathe. To drill/bore a 5/8" hole in the center of them. Possibly also some phenolic bound color comets, iirc. But that wasn't a common practice for me. Only to correct timing. On overly tall comets. That should have been made more puck like. Although the swimming stars can just be rammed/pressed. On a former, with a offset spindle Edited April 6 by Carbon796
LiamPyro Posted April 6 Posted April 6 If anyone has a composition for these silver swimming cores, please share! I’m thinking it’s probably a fast burning aluminum flitter/wave formula?
Zumber Posted April 7 Author Posted April 7 10 hours ago, Carbon796 said: Cylindrical swimming stars. Can be made in small machine wound tube's like " more traditional " go-getters or zips. Clay is what was traditionally used, for round rolled jetting stars. There should always be some concern when working with a live comp. Regardless of the type of process. But obviously drilling in to a live comp has increased risks. It shouldn't be done in a sensitive comp. The drill speed should be kept as low as practical. And only sharp fresh drill bits should be used. With no dwelling or delay. Any comps with large coarse Ti or FeTi should be avoided. The tip of the drill bit needs to be checked for heat. After drilling. To help gage your safety. I used to hand " drill " all of my all of my spolettes. For precise/precision timing. ( probably hundreds of spolettes ) And, once even chucked some 4" glitter comets, up in the lathe. To drill/bore a 5/8" hole in the center of them. Possibly also some phenolic bound color comets, iirc. But that wasn't a common practice for me. Only to correct timing. On overly tall comets. That should have been made more puck like. Although the swimming stars can just be rammed/pressed. On a former, with a offset spindle Thank you for more clarification 😊
Zumber Posted April 7 Author Posted April 7 6 hours ago, LiamPyro said: If anyone has a composition for these silver swimming cores, please share! I’m thinking it’s probably a fast burning aluminum flitter/wave formula? Not suitable and you can't drill hole in it its dangerous. I don't know if it will swim or not but I can say it gives a nice silver tail. One is BP plus titanium and second is wave which uses flash as a base mixture and different mesh aluminum (atomized/flitter) as a spark producing agent.
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