633 replies to this topic

[Jerronimo]

3 inch shell

[sasman]

Fantastic Shell jerronimo Best one i have seen sofar! If i had bought that from a firework shop i woulnt have know it was Homemade! ....I like those stars? what Formula did you use ? Also did you use whistle For the burst Charge.?.

.Also when clicking on your link for the video i get an error saying no direct linking allowed? I had to browse your site for direct link..

[Patrick]

You can get the movie from here ..

http://jerronimo.250....com/fireworks#

Does look great. I had the same questions as above.

[Jerronimo]

Thanks for the replies guys.

U should have seen it in real life, the effect of the stars doesn't show as well on this poor video.
It was a huge break, this is what I used:

11mm modified crys6 stars,I primed the stars with a layer of crys6.
6:1 bp/hulls main breakcharge
2 grams chlorate/benzoate wistle booster
liftcharge: 20 gram riced BP
3'' plastic hemmies glued together with methelene chloride, no extra pasting or fibretape added.

This is the (very simple) formula:

80% crysantium 6
20% 250 mesh atomised aluminiumpowder(tiranti)
Dextrin was ballmilled with the crys6 mix.

Edited by Jerronimo, 10 October 2004 - 09:47 AM.

[Pretty green flames]

Hi all

Would it be possible to make a nice pretty blue collor with Kno3 and Copper Sulfate.

I can't get my hands on KCLO4 so i'd have to stick to KNO3.



Thnx
LP

[adamw]

In a word. No

Blue is quite hard, even with the correct chemicals. With KNO3 it is absolutely impossible. There are several discussions on the forum about getting good blues.

[miniskinny]

Yeah, there's a lot of questions about trying and always failing to get a blue, or really any color except red/purple with a Nitrate. Look on the forum for the post about the colored thermites... Does anybody have a long list of colored formulas for a non-perchlorate-challenged amateur? Preferrably something with copper sulfate and strontium carb.

[Creepin_pyro]

With nitrates, green and red colours are fine, but there's not much point bothering to attempt a decent blue. It's just not going to happen.

I've never seen a star formula containing Strontium Carbonate that didn't use Kcl04 as the main oxidiser. Strontium Nitrate however, will produce a lovely red.

Copper Sulphate has very little use.

[Pretty green flames]

So basicly for stars i need a stronger oxidizer than KNO3 something like
KCLO3 or KCLO4 .

I Just have to find some.

LP

[Creepin_pyro]

Care to share these green and red formulas you can produce with KNO3?

I said Nitrates, as in Barium Nitrate and Strontium Nitrate. Then, of course there are other exotic nitrates that spring to mind, but I have no experience with them.

IIRC, Weingart lists a few Kn03 colours - pink, and mabye an off red. Not sure about green. I'll look them up for you later.

[adamw]

Remember to get good colours you need a source of Cl too - that is why (per)chlorates are the best bet. You CAN use KNO3 at a pinch, but you will need to add some Cl to get a half-decent colour.

[Matt]

tailed stars are getting boring - glitters can only be a novelty so long.

 

*points toward door* get out

[alany]

I think Daniel needs to build hmself and electrolytic cell.

You can do Red and Green with nitrates, the method Phoenix posted should work for Strontium Nitrate as well as Barium Nitrate. The green will be whitish, and the red will be orangish without some chlorine but magnesium can help I've found.