Sunrise yellow

[rellim]

@kaotch

I probably used monocapa + bp. I fired them from a small mine which gives easier ignition than in a shell. A dozen stars lit up the whole backyard. My MgAl is -200 +325.

 

I don't have a copy of the Hardt book but I recently found this:

Hardt Yellow Star #5

This star burns yellow.

Barium nitrate 29
Potassium perchlorate 29
Cryolite 9.5
Magnalium (-200 mesh) 9.5
Red gum 7
Parlon 12
Dextrin 4

Edited April 12, 2019 by rellim

[kaotch]

Thanks for the info . I do have a copy of Hardt's book and wil tryout several yellow formulae.

[Mike71]

Are there any storage issues with this comp... being extremely hygroscopi wirh sodium nitrate and magalum

[rellim]

Cryolite is cheap and nearly insoluble in water. I got a pound of it at a local ceramics supply shop for $4.50. I made some Hardt yellow 3 with it and it was incredibly bright. I didn't have any suitable Al so I substituted 16.2 MgAL for the 19 Al.

That should be 18/.85 = 22.4 MgAl.

[kaotch]

@relim

Replacing Al for MgAl, calculating on basis of Fuel Value 22,4 MgAl is correct.How did you arrive at this value using 18/.85= 22.4 ?

[RKB122]

My Sodium Nitrate comes to me around -10 mesh, do I need to mill it or could someone tell me a baseline mesh size for NaNo3 compositions?

[Mumbles]

You'll need to reduce it's particle size. I'd probably want to get it to at least -100 mesh before use. Milling is probably the easiest way to reduce it to a fine powder in useful quantities.