Delay composition

[Ejobosn2001]

Hello all, I was just looking for a good delay composition that does not contain boron or zirconium. This will be used in Stinger Missiles. Thank for all your time and help.

[FrankRizzo]

Woah! Those must be some exotic delay comps. Where did you see those formula?

 

I use either a modified Chrysanthemum of Mystery or Winokur 39.

 

COM:

 

Charcoal Airfloat 50

Potassium Nitrate 45

Sulfur 5

Dextrin +6

 

 

Win39:

 

Potassium Nitrate 51

Charcoal Airfloat 19

Antimony Trisulfide, Chinese needle 12

Aluminum, atom, spher, 120-325 mesh, 20 micron 8

Barium Carbonate 5

Dextrin 5

[Caleb51]

Does the First one you listed actually burn slowly? It looks (By the formula, similar to regular black powder) like it would burn fast. I have never made delay comp, so I don't know obviously, but I'm just asking. And thank you for posting this thread, I was curious about this as well.

[FrankRizzo]

Caleb,

 

It's heavily over-fueled, so it burns quite slowly, leaving a nice charcoal streamer effect.

[Mephistos Minion]

How do you see 50 Charcoal and 45 KNO3 as close to 75 KNO3 15 Charcoal? I have found some delay comps that use coarser charcoal for it to burn slower, I find this to clog up tubes a bit (might just be my charcoal) but either way I'd go for one with airfloat charcoal and KNO3 for cheapness and ease.

[Ejobosn2001]

Thank you for all of your help so far. But i have one question with COM delay composition, should it be milled or hand mixed?

[Douchermann]

I would mill it, its slow enough as it is. Of course, its going to require some experimentation to get the right delay.

[FrankRizzo]

The modified Chrysanthemum of Mystery should be ball milled for 3hrs, or however long it takes your particular mill to grind as finely as possible.

[shadopyro]

Heh heh guess crappy garden centre kno3 has some uses, the one i ordered makes pretty slow burning BP. I just use it for delay in rockets and in some charcoal stars. Nice and easy without requiring those hard t find exotic chems!