Zumber Posted September 12 Posted September 12 Good evening Friends...!! I really want to attatch rising tail comets to 5 inch 6 inch and 8 inch shells. I am planning 1 inch diameter 3/4 inch height comets to attatch to shells. Now problem is I dont have time fuse and I am gonna use half inch ID spolette. If I use bottom fused (spolette at bottom) method then I need to fix comet to top side of shell....I am worried how it looks when shell comes out of mortor as comet weight is more than spolette comet will come down side of shell and soplette remains on top position how does it looks as spolette also adds tail effect. If I use top fuse ( spolette method) I need to attatch comet to side of spolette like fan(V) shape. what should I do.? which method Do I use??
a_bab Posted September 12 Posted September 12 (edited) You didn't specify round or cylindrical shells. But either way they will spin like crazy while ascending so the spoulette won't detract from the tail. Edited September 13 by a_bab
cmjlab Posted September 12 Posted September 12 I 2nd what a_bab says about shells spinning like crazy anyways. 1
Arthur Posted September 12 Posted September 12 (edited) This was time fused so minimal tail from there, but the shell spinning from the mortar is shown clearly as the tail from the added rising tail shows. You cannot avoid the spin, so accept it and include it in your design! youtube.com/watch?v=z9XNUnbxo50 Edited September 12 by Arthur added link
Zumber Posted September 13 Author Posted September 13 8 hours ago, a_bab said: You didn't specify round or cylindrical shells. But either way they will see spin like crazy while ascending so the spoulette won't detract from the tail. round shells. Thank you.
Zumber Posted September 13 Author Posted September 13 5 hours ago, Arthur said: This was time fused so minimal tail from there, but the shell spinning from the mortar is shown clearly as the tail from the added rising tail shows. You cannot avoid the spin, so accept it and include it in your design! youtube.com/watch?v=z9XNUnbxo50 Thank you. It seems link pasted is not clickable.
cmjlab Posted September 13 Posted September 13 (edited) 17 hours ago, Zumber said: If I use top fuse ( spolette method) I need to attatch comet to side of spolette like fan(V) shape I missed this part of the post. I've never made anything bigger than 6" ball shells, but I've top fused them and bottom fused them, placing the rising comet offset from the TF when top fused, and centered when bottom fusing. Both have worked. I've seen lots of other large shells on YouTube where they are top fused with two TF and the rising comet is offset. I think you are good to go regardless how you choose to place them on top of the shell. Good luck. Chuck Edited September 13 by cmjlab Clarifying that I don't make very large ball shells. I mainly prefer cylinder shells.
Zumber Posted September 13 Author Posted September 13 (edited) Thank you cmjlab..!! can you post one youtube link for referance with top fusing method round shell which also have comet fixed? Edited September 13 by Zumber
cmjlab Posted September 13 Posted September 13 I'm looking through my photos and videos hoping to find something similar, but I dont thinkI have any. I will keep looking on YouTube, and elsewhere for an example, as I'm sure I've seen someone share a video or photo. I did find an example of a 16" top fused shell, someone else made, unfortunately there is no comet, and the photo quality is not great. It did get me thinking as to why I ever top fused in the first place, and it was related to avoiding "blow through" of the spolette on smaller shells, since they don't have as much of a B.P. core (depending on how you make the spolette). Larger shells may, or may not, have that issue - but would certainly lying have a longer B.P. core due to a longer timing. Of course now I know that to avoid that issue all together i can just make a longer than needed core in the spolette, and dri it back to the timing I need. Still, I'm sure there is a point at which the risk of damaging the spolette due to the size / weight of a shell becomes an issue. (**sorry for the rambling here**) For bottom fusing and having a rising comet effect on top, heres one of Ned Gorski's bottom fused 12" shells, similar to what you want to build. It should make you feel confident that the spolette / Time Fuse burning won't interfere with the rising comet effect. Chuck
Zumber Posted September 13 Author Posted September 13 Thank you man again..!! I have fired many top fused shells I have two kinds of pvc balls, One is whole ball having provision to fix spolette (half inch diameter) & secondly I have pvc hemispheres which is like usual hemispheres I need to drill hole and fix spolette. Below I am attaching images of empty ball and white one is ball filled with stars burst and attatched spolette to it.....I wrap sting around it with white glue....these balls are used for top fusing method. It can also be used as a bottom fusing method. 1
brad224 Posted October 3 Posted October 3 i know it borders on pyrotechnic blasphemy, so please don’t get too upset, but i attach “tails” to most of my shells, canister and ball, from 1.75 up to 4”. all are bottom fused. my rising tails are simply tiger tail, chrysanthemum #8 or winokur #20 glitter stars, 3/8 “ pressed, and (shudder) hot glued to the bottom of the shell with the lift cup under it. depending on how adventurous i feel, i often glue 2, 3 or even 4 of them around the time fuse. the lift charge lights it all. it may not be particularly sophisticated or traditional, but it seems to make a pretty consistent and nice-looking tail.
cmjlab Posted October 4 Posted October 4 Well if it works then I wouldn't change anything. I'd imagine that with smaller cylinders it's not as important, as the ly aren't building up the same pressures a larger / heavier shell would. And..... at least if you ever have a flowerpot, you have a headstart of what to troubleshoot. 🙂
Mumbles Posted October 7 Posted October 7 As others have said, it's going to spin regardless, so I wouldn't worry too much about it. Adding a couple of comets or using large, wide comets can mask this effect to some degree in some cases. Large, wide comets may require specialized tooling due to the curvature of the shell. One suggestion I'd make is to paste the sides of the comet. If you use just hot glue on bare comets, there is a fair chance the comet will detach during the ascent as the glue melts. There is a way around it making something known as "meteor" shells. This uses a smaller shell as a core, and rolling the tail composition over it essentially making a gigantic rolled star. This is most certainly more trouble than it's worth.
Zumber Posted October 8 Author Posted October 8 19 hours ago, Mumbles said: As others have said, it's going to spin regardless, so I wouldn't worry too much about it. Adding a couple of comets or using large, wide comets can mask this effect to some degree in some cases. Large, wide comets may require specialized tooling due to the curvature of the shell. One suggestion I'd make is to paste the sides of the comet. If you use just hot glue on bare comets, there is a fair chance the comet will detach during the ascent as the glue melts. There is a way around it making something known as "meteor" shells. This uses a smaller shell as a core, and rolling the tail composition over it essentially making a gigantic rolled star. This is most certainly more trouble than it's worth. Got it.. Thank you very much...!!
Zumber Posted October 18 Author Posted October 18 Can anybody tells how this paper ring is prepared??? Stars are arranged first over paper and then paper is rolled ? Or paper tube is first prepared and stars are inserted one by one in paper tube? I can see paper is twisted after every single star. Another question is how it is placed in a hemisphere just placed and taped it outside hemisphere to hold its position or it is pasted to shell hemisphere inside? Any video footage or link will be appreciated for more precise understanding. Thank you.
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