Firefly Star Comp
#1
Posted 13 June 2006 - 07:55 PM
If you make it waterproof they'll just make a deeper ocean.
If you make it foolproof... They'll just find 'emselves a redneck!
#2
Posted 14 June 2006 - 08:23 AM
#3
Posted 14 June 2006 - 09:02 AM
#4
Posted 14 June 2006 - 12:43 PM
I don't see any coloured firefly there...you can find some comp from www.cannonfuse.com
#5
Posted 14 June 2006 - 01:10 PM
#6
Posted 14 June 2006 - 01:37 PM
The only way I know of producing a coloured star with a fire-dust tail would be to make a stacked comet, or cavity star.
#7
Posted 04 February 2008 - 04:02 PM
Firefly #1
Source: rec.pyrotechnics archive. Posted by Eric Eisack.
Comments:
Preparation: Aluminum is large flake. It was sieved through a windowscreen. This gives about 30 mesh powder.
Potassium nitrate.................................50
Charcoal,air float................................29
Charcoal, 80 mesh.................................10.5
Sulfur............................................6
Aluminum (large flake)............................4.5
Dextrin or CMC....................................+5 or +1
Firefly #2
Source: rec.pyrotechnics archive. Posted by Dan Bucciano.
Comments: Can also be used as rocket propellant: Mix the chemicals, dampen, and granulate through a 20 mesh screen and dry. Use +3% by weight as a tail effect. Once you have passed the top core of the rocket by 1/2 inch, you may ram 100% firefly formula the rest of the way. You will end up with a beautiful long trailing tail of firefly.
Preparation:
Potassium Nitrate.................................47
Air Float Charcoal................................33
Antimony tri-sulfide..............................5.8
Aluminum (400 mesh,12 micron, spherical)..........4.2
Sulfur............................................4.7
Dextrin...........................................5.2
Firefly #3
Source: PML Digest 391, post by L.Niksch <LNiksch@aol.com. This formula is provided with the "firefly aluminum" from Skylighter.
Comments:
Preparation: Ball mill potassium nitrate, Air Float charcoal, sulfur and Dextrin together for 1 hour. Then add the 36 mesh Charcoal and firefly aluminum and mix with a spoon. Add water to make a dough mix and cut with a knife into 3/8" cut stars. Separate stars and dry for 3-4 days. The effect is a long tiger tail going up and firefly sparkles coming down. Larger stars take longer to dry, and a damp star produces very little firefly effect.
Potassium nitrate.................................49
Charcoal, air float...............................29
Charcoal, 36 Mesh.................................11
Sulfur............................................9
Dextrin...........................................10
Aluminum, firefly.................................5
#8
Posted 04 February 2008 - 08:38 PM
Edited by Pyro-pal, 04 February 2008 - 08:38 PM.
#9
Posted 05 February 2008 - 11:22 AM
That second formula you listed looks more like a glitter than a firefly with the antimony trisulfide added. Shimizu added barium sulfate to a firefly formula, I believe you'll get better flashes with the added sulfate.
Shimizu Firefly #5
KNO3 50
Charcoal (AF) 45
Barium Sulfate 7
Sulfur 5
Wheat paste 5
10-12 mesh Al 4.6
#10
Posted 05 February 2008 - 02:44 PM
#11
Posted 05 February 2008 - 11:35 PM
#12
Posted 12 February 2008 - 06:50 PM
#13
Posted 12 February 2008 - 10:33 PM
It's unlikely you'll need any prime, they should light easily. If you do prime, meal should be sufficient.
That second formula you listed looks more like a glitter than a firefly with the antimony trisulfide added. Shimizu added barium sulfate to a firefly formula, I believe you'll get better flashes with the added sulfate.
Shimizu Firefly #5
KNO3 50
Charcoal (AF) 45
Barium Sulfate 7
Sulfur 5
Wheat paste 5
10-12 mesh Al 4.6
The sulfate is actually there as a delay agent to just about everything in the composition. If you make a black powder fountain with 40 grams, and put a few grams of calcium sulfate and just a gram or two of aluminum it, it will all react once the fountain has gotten hot enough, and all of the composition will burst out of the top of the tube.
#14
Posted 09 March 2008 - 09:00 PM
http://video.google....5...45286&hl=en
Excuse the grainy image.
----
Compare with a firefly effect that sparsely twinkles:
http://www.youtube.c...feature=related
#15
Posted 10 March 2008 - 11:06 PM
Here’s a video of a longer drawn out firefly effect that looks more like a cascade:
http://video.google....5...45286&hl=en
Excuse the grainy image.
Pyro-pal: you know the formula of this effect; like a cascade ?
75-15-10. It is everything what you need to know in this life.
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