Mumbles Posted February 3, 2021 Share Posted February 3, 2021 You'll have to try and see. With that much metal around, the carbonate might start to become less innocent in the composition. It takes a strong fuel, but with enough force you can turn carbonates into oxidizers. See Buell Red for instance. The strontium carbonate is more than just a colorant. 1 Link to comment Share on other sites More sharing options...
deepakpyro Posted February 4, 2021 Author Share Posted February 4, 2021 (edited) You'll have to try and see. With that much metal around, the carbonate might start to become less innocent in the composition. It takes a strong fuel, but with enough force you can turn carbonates into oxidizers. See Buell Red for instance. The strontium carbonate is more than just a colorant.Agree with you Mumbles...have to try. Edited February 4, 2021 by deepakpyro Link to comment Share on other sites More sharing options...
deepakpyro Posted February 4, 2021 Author Share Posted February 4, 2021 Made star roller today after long break.. it took a week to make(spent only 10 mins each day).. dont ask why 😂.. Comments welcome..  All parts are scavenged from scrap yard and some old furniture & wood works. VID-20210204-WA0002.mp4 VID-20210204-WA0003.mp4 Link to comment Share on other sites More sharing options...
deepakpyro Posted March 7, 2021 Author Share Posted March 7, 2021 (edited) Why my pumped star is a disaster? This is dextrin based star.. tool used to pump is syringe. This is a red star, contain mgal, al, strontium nitrate, PVC powder, C and S.  Why this happening any reason ?. It happened when i kept for drying under shades Edited March 7, 2021 by deepakpyro Link to comment Share on other sites More sharing options...
SeaMonkey Posted March 8, 2021 Share Posted March 8, 2021 Wow! That is some serious breaking up. It looks as if in the process of drying something is expanding internally. Link to comment Share on other sites More sharing options...
deepakpyro Posted March 8, 2021 Author Share Posted March 8, 2021 Exactly, its look like over moist bread in very hot oven Link to comment Share on other sites More sharing options...
deepakpyro Posted July 19, 2021 Author Share Posted July 19, 2021 (edited) My first 4inch shell. I am satisfied with the timing and height of burst.still have to work on break. I am using 7:1 rice husk coated BP VID-20210719-WA0005.mp4 Edited July 19, 2021 by deepakpyro Link to comment Share on other sites More sharing options...
deepakpyro Posted November 5, 2021 Author Share Posted November 5, 2021 (edited) Made few 4 inch spherical shell with color inserts and few salutes for Diwali night.  Total number of inserts : 2 white strobe, 1 pink, 1 Red and 1 green and 5 salute (~5gms flash) Soft break due to less bursting charge Shell no 2 :(WA0015) modified D1 glitter - Ned's formula I quite satisfied with the break and it kind of not reached its apogee.  Shell no 3: (WA0017) Green star nitrate based Star size : ~7 mm cut Stars + prime - final size around 9 mm Arranged to get uniform round shell effect but few stars burst blind. Blind stars is due to lack of really hot prime using only Nitrates.  Bursting charge : 7:1 Bp coated rice husksBooster charge: slow flash VID-20211103-WA0004.mp4 VID-20211104-WA0015.mp4 VID-20211104-WA0017.mp4 Edited November 5, 2021 by deepakpyro 1 Link to comment Share on other sites More sharing options...
PRANAB Posted November 5, 2021 Share Posted November 5, 2021 Nice...How did you arrange them....?? Please do share detailed of that...Thanks... Link to comment Share on other sites More sharing options...
BengalFlair Posted November 5, 2021 Share Posted November 5, 2021 Great job!! Link to comment Share on other sites More sharing options...
SeaMonkey Posted November 5, 2021 Share Posted November 5, 2021 Agreed! Very nice work! Link to comment Share on other sites More sharing options...
deepakpyro Posted November 6, 2021 Author Share Posted November 6, 2021 (edited) Nice...How did you arrange them....?? Please do share detailed of that...Thanks...I missed to take pics of the construction, but i will try to cover as much details i can. Color inserts : its a ~1 inch plastic ball, which i bought as qty of 100 from local toys supplier. Used visco fuse from commercial fireworks as delay fuse. Stars are made like mouse turds, passed through 12 mesh screen, primed with BP + 8% mgal + 5 Indian Dark Al. For each color insert i used kno3 flash powder as bursting charge.  For salute - i used 12 mm dia paper tubes, both end sealed with mud+glue and made a small opening on top with a pin and black Match dipped in BP+ dextrin slurry used as timing fuse. I used 2 color insert and salute in one hemi and only 3 color insert in others hemi which doesn't have spolette. Used 7:1 rice husk and ~5 gms of slow fash as booster on each hemis. These color insert doesn't fit into each hemi's, so i have arranged in a manner, so that there will be few space left in opposite hemi to fit in. Finally few tap on closed shell bought two hemi's together and used 12 layers of 3/4 inch of gum tape on shell. Burst is little week due to shell is not dried enough due to heavy rain. will post the fully dried shell in couple of days Edited November 6, 2021 by deepakpyro 1 Link to comment Share on other sites More sharing options...
PRANAB Posted November 6, 2021 Share Posted November 6, 2021 I missed to take pics of the construction, but i will try to cover as much details i can. Color inserts : its a ~1 inch plastic ball, which i bought as qty of 100 from local toys supplier. Used visco fuse from commercial fireworks as delay fuse. Stars are made like mouse turds, passed through 12 mesh screen, primed with BP + 8% mgal + 5 Indian Dark Al. For each color insert i used kno3 flash powder as bursting charge.  For salute - i used 12 mm dia paper tubes, both end sealed with mud+glue and made a small opening on top with a pin and black Match dipped in BP+ dextrin slurry used as timing fuse. I used 2 color insert and salute in one hemi and only 3 color insert in others hemi which doesn't have spolette. Used 7:1 rice husk and ~5 gms of slow fash as booster on each hemis. These color insert doesn't fit into each hemi's, so i have arranged in a manner, so that there will be few space left in opposite hemi to fit in. Finally few tap on closed shell bought two hemi's together and used 12 layers of 3/4 inch of gum tape on shell. Burst is little week due to shell is not dried enough due to heavy rain. will post the fully dried shell in couple of daysOkay...For more information I will communicate with you later....Thanks... Link to comment Share on other sites More sharing options...
sora Posted November 6, 2021 Share Posted November 6, 2021 Great job, can yo share the pink star composition? Link to comment Share on other sites More sharing options...
deepakpyro Posted November 6, 2021 Author Share Posted November 6, 2021 Pink star -Strontium Nitrate- 50Mgal 200 mesh- 19Pvc - 18Sulphur/red gum - 5Charcoal airfloat- 4Cupric - 16Dextrin - 5Â The composite is over 100% Instead of Mgal only, 50/50 mgal and spherical 325 mesh Al will work also. 1 Link to comment Share on other sites More sharing options...
sora Posted November 8, 2021 Share Posted November 8, 2021 Pink star -Strontium Nitrate- 50Mgal 200 mesh- 19Pvc - 18Sulphur/red gum - 5Charcoal airfloat- 4Cupric - 16Dextrin - 5 The composite is over 100%Instead of Mgal only, 50/50 mgal and spherical 325 mesh Al will work also.  Thanks a lot Link to comment Share on other sites More sharing options...
Himanshu Posted November 8, 2021 Share Posted November 8, 2021 Great Job👌Loved the D1 glitter, it was really awesome. Link to comment Share on other sites More sharing options...
deepakpyro Posted December 7, 2023 Author Share Posted December 7, 2023 After a long break made made few 4 inch and 3 inch shell. Missed to take videos of the performance but got few from friends. 1. My first ever crackle star shell - 3 inch - flash burst 2. Ned's modified D1 glitter 4 inch - flash burst  Used non milled BP for lift, so it is not great. But overall satisfied VID-20231128-WA0002~2.mp4 VID-20231126-WA0003~2.mp4 Link to comment Share on other sites More sharing options...
cmjlab Posted December 7, 2023 Share Posted December 7, 2023 (edited) Nice shells, great symmetry and love the glitter effect on that 2nd video! Nice work! Edited December 7, 2023 by cmjlab Link to comment Share on other sites More sharing options...
Guest Posted December 8, 2023 Share Posted December 8, 2023 Hmmmm. Last videos don’t play for me. Link to comment Share on other sites More sharing options...
Zumber Posted December 8, 2023 Share Posted December 8, 2023 15 hours ago, deepakpyro said: After a long break made made few 4 inch and 3 inch shell. Missed to take videos of the performance but got few from friends. 1. My first ever crackle star shell - 3 inch - flash burst 2. Ned's modified D1 glitter 4 inch - flash burst  Used non milled BP for lift, so it is not great. But overall satisfied VID-20231128-WA0002~2.mp4 VID-20231126-WA0003~2.mp4 Very nice shells friend...!! Specially gliiter is pretty...!! Is it pumped star ? What is binder and solvent for that?. Also loved burst charge for shells..!! Link to comment Share on other sites More sharing options...
deepakpyro Posted December 8, 2023 Author Share Posted December 8, 2023 9 hours ago, Zumber said: Very nice shells friend...!! Specially gliiter is pretty...!! Is it pumped star ? What is binder and solvent for that?. Also loved burst charge for shells..!! Yes, it is pumped star. I have 14mm star pump made locally. Used dextrin as binder and water+IPO for activation. For the 4 inch, i mixed rice husks and slow flash to fill the gap between the stars and to avoid very hard break Link to comment Share on other sites More sharing options...
Zumber Posted December 9, 2023 Share Posted December 9, 2023 Thank you for response...!! Link to comment Share on other sites More sharing options...
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