Stars effect

[pyrogeorge]

Hi,

Do you know how to put the stars in the hemis to make like this effect?

[AdmiralDonSnider]

This seems to be a ring shell (having one ring of stars touching the hemis inside) with some larger comets included in the same plane as the main stars, placed more towards the center of the shell. The rest is filled with burst composition such as coated rice hulls. This is what I would say is the concept.

[pyrojig]

Just food for thought

It too could be a double petal shell . One inner with the large 1" comets with a 10% + metal content , and the outer petal a color ring both of which are oriented in the same axis . '. I had made a similar effect doing this method. Using a 8in shell with a 5" inner . You can get about 8 x 1in comets in there on a ring, and the 8" would hold many 1/2" color stars to ,make a ring .

[pyrogeorge]

thanks guys..Has anyone got any photos from the construction of these sell?

[pyrojig]

Sadly I do not have a pic. I have had the worst luck with phones and was lost before I had a chance to upload it to my photobucket acct. I would love to share a pic, I know it is worth a thousand words .

[schroedinger]

You have the skylighter book pyroprojects? Have a look at page 292, there you find what you are looking for.

[pyrojig]

The critical things to consider when manufacturing a shell of this type is the sizing of the stars ( color stars and the silver streamer stars). If the sizes are off a lot ,then the larger ones will fly out further than the others . Usually the color stars are smaller than the streamer stars. This is where it gets tricky. A double petal shell helps overcome some of this . But still one must balance the break to obtain the proper star orientation in the flower.

Edited October 20, 2013 by pyrojig

[Seymour]

Not just sizing, but shape counts too. Some good effects can be made with pumped stars, but for perfect symmetry, round stars, perfectly sized as pyrojig is saying, is the way to go.

[burningRNX]

I think that they just put together 2 hemi's both filled with a ring of different stars, no double petals

Example:

Edited October 21, 2013 by burningRNX

[pyrogeorge]

I think that the comets will burn to outer petal not from center.

[Niladmirari]

What do you think. Form stars affects the symmetry? Sphere stars - a symmetrical expansion. Cylinder, square stars - not symmetrical expansion ?

[Mumbles]

That is generally true. It seems to be most noticable as the stars slow a bit. The odd shaped cut or pumped stars tend to fly more erratically.

[pyrojig]

I can second that . In past I had tried to make ring shells with cut squares or pumped and as Mum's said they fly erratically .

Round and "sized" stars are the key to symmetrical breaks as well as a good burst.

[Niladmirari]

Mumbles, pyrojig thank you! I thought as much

 

I found:

 

What may be composition?

[dan999ification]

I think mgal glitter because of the fizzing.

C6 and mgal sounds and looks like this just without the flashes.

 

Dan.

[Niladmirari]

Yes. Looks like. Thanks Dan! Very powerful effect. Glitter on steroids

[BPgorilla]

hi everyone, sorry haven't checked in for a while...hope everybody's turkey day was great. can't wait for Christmas. I was having some trouble with some blue stars that I made and I was wondering if anybody could shed some light on the subject? I used T. Shimizu formula 61%pat. Prec. , 12% cop carb., 13% parlon, 9%red gum, & 5% dextrin. its been over 2 weeks drying, and when I put it in the star tester they don't ignite. Why? They only ignite if I hold the flame to them. can somebody give me some feedback on this please? Edited December 23, 2013 by BPgorilla

[Niladmirari]

If don't ignite in shell. Needed prime (coating): Pat. Prec. 70% + charcoal 30% + dextrin 5%.

Or don't ignite on the ground?

[Mumbles]

As Niladmirari said they probably need to be primed. Blue stars are particularly prone to blowing out too for some reason.

[Niladmirari]

Hi. Please tell me what could be the composition:

http://www.jorge.com.pl/eng/fajerwerki-profesjonalne-film-87-1010-2.html

Thank you!

Edited December 27, 2013 by Niladmirari