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roger's pyrotechnic offerings and experiments


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#1 rogeryermaw

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Posted 25 October 2014 - 08:23 PM

It's never done. There is always a new formula or method to be tested and hundreds of tweaks and mods within each of those. With the admin's blessing, I'll place such dalliances here.






Edited by rogeryermaw, 25 October 2014 - 08:32 PM.

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#2 rogeryermaw

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Posted 25 October 2014 - 08:31 PM



#3 ddewees

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Posted 25 October 2014 - 08:38 PM

Nice green

#4 mkn

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Posted 25 October 2014 - 08:46 PM

great greens !!   Dang, I don't want to work with chlorates.......Barium nitrate is what

I have done, and about the same, not quite like the chlorates.  nice set of video tests !

Matt


its an endless cycle plan, mix, dry, build, launch, adjust, plan, mix, dry, build , launch, oh I have to go to work now don't I.......

 

Matt


#5 braddsn

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Posted 25 October 2014 - 10:44 PM

Those are super bright greens.... good deep color! I am having to step-prime my greens, for some reason they seem as hard to light as blue stars. 


Always out of Parlon. 

#6 rogeryermaw

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Posted 25 October 2014 - 11:00 PM

Thanks! Having a hard time with my crackle stars though...

Both the chlorate and nitrate stars were surprisingly easy to light. The nitrate ones even worked in a stargun unprimed. The chlorates were just rolled in a hot prime and then nc to protect the chlorate from the sulphur in the final bp layer.

#7 dave321

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Posted 26 October 2014 - 05:09 AM

barium chlorate / shellac ??

lift charge weight for the 1.25" mine ??

Edited by dave321, 26 October 2014 - 05:10 AM.

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#8 rogeryermaw

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Posted 26 October 2014 - 07:43 AM

Chlorate/phenolic/hexamine and I didn't weigh the lift but typically use 4-5 grams for a 1.25".

#9 Bobosan

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Posted 26 October 2014 - 07:44 AM

The chlorate greens do look very nice, indeed.



#10 Jakenbake

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Posted 26 October 2014 - 09:18 AM

So you can use chlorate and hex together?

#11 rogeryermaw

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Posted 26 October 2014 - 10:04 AM

I don't know how it stores yet. I am going to be doing quite a bit of experimentation with the phenolic/hex syrup in the coming weeks but I suspect that the phenolic binding will minimize instability sort of like coating metal particles with parlon. Just a guess. I will have a 20 gram batch cut and primed this weekend that I'll store in the harshest conditions I can muster to see how it holds up but short term indications are positive.

#12 rogeryermaw

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Posted 29 October 2014 - 11:36 PM

 

this is a finicky and difficult to light formula but i like the color. i intend to keep working with it to see if i can get it to perform better.


Edited by rogeryermaw, 29 October 2014 - 11:38 PM.

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#13 ddewees

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Posted 30 October 2014 - 09:12 AM

Why do people take video in portrait mode? 



#14 wildcherryxoxo

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Posted 30 October 2014 - 09:17 AM

maybe sodium benzoate?


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#15 rogeryermaw

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Posted 30 October 2014 - 09:29 AM

Those are super bright greens.... good deep color! I am having to step-prime my greens, for some reason they seem as hard to light as blue stars. 

if you have the chems, this formula has worked for me as a cut star with only a single layer of 75:15:10 kp with 5% mgal. this is the nitrate green in the second vid at the top.

 

Barium nitrate 42
Potassium Perchlorate 20
Magnalium 12
Parlon (or Saran*) 18
Red Gum 8
SGRS 3

 

wetted with 70:30 alcohol:water

 

i didn't use binder in the prime. just dusted the patty before cutting.

 

there is no requirement to watch what i post for those who cluck their disapproval. a note on this subject, i do have a new camera i will be using going forward.


Edited by rogeryermaw, 31 October 2014 - 03:48 PM.


#16 ddewees

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Posted 30 October 2014 - 11:17 AM

My question wasn't clucking disapproval, I was just asking why people choose not to rotate their phone when recording video. Do they like watching videos on YouTube with black side bars, or are they unaware that if they rotate their screen, they'll get full frame videos?? I can't think of any other reason other than just lazy...

#17 rogeryermaw

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Posted 30 October 2014 - 12:16 PM

apologies dd. sorry i snapped. it is annoying to have a third of my work cut off by the phone but i have a decent nikon digital cam now that i will be working with. now i just need someone to take the video from further away.



#18 rogeryermaw

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Posted 30 October 2014 - 09:35 PM

Ba(ClO3)2 atomized magnesium

 

Ba(ClO3)2 spherical mgal


Edited by rogeryermaw, 30 October 2014 - 09:36 PM.


#19 rogeryermaw

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Posted 31 October 2014 - 03:36 PM

some info about these formulae so far:

 

the comp i already posted is from Charlie Wilson.

 

the first set of chlorate stars were 80:20 chlorate:fuels. the fuel was 3:1 phenolic resin:hexamine.

 

the stars acting difficult were:AP 60,

                                              barium nitrate 15,

                                              hexamine 20,

                                              red gum 5 (Niladmirari)

these are pretty in color and they are much easier to light reliably when rolled. they don't take fire as readily when cut. they may benefit from a small percentage of d.e. or wood meal to give some porosity...speculation.

 

the more recent tests were:68 barium chlorate,

                                           12 atomized magnesium,

                                           12 parlon,

                                             8 red gum (potassium chlorate from this forum)

 

and:                                    68 barium chlorate,

                                           12 80-200 magnalium,

                                           12 parlon,

                                             8 red gum.

 

i am currently testing different ratios of these last two mixed to offer a range of burn speeds and brightness. they light very easily. those shot from the star gun in the videos were only dusted with sulfurless kp with about 8% mgal before cutting. no further priming was done. for use with standard bp break, seal with nc and roll in meal powder.


Edited by rogeryermaw, 31 October 2014 - 03:47 PM.


#20 enanthate

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Posted 01 November 2014 - 06:09 PM

Dude. Those greens look supernice! Good job.

Got a couple of green formulaes myself, but can't say they give such a nice color.

Is there any difference when binding with acetone/parlon? I never make mine with water, maybe this affects the results. I get a decent green, but if I remember correctly it's a tiny bit pale compared to yours.

I've only used pot perc and barium nitrate/carbonate, as I don't have hex, AP or ba chlorate.

Your first posted formula is quite similar to mine if I'm not wrong, easy to ignite indeed.






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