Random Thread #1

[Mumbles]

ASB gave a much more complete view of what I was trying to describe. If I were to do it, that is approximatly how I would do it. I would possibly run the catalyst furnace with a refractory cement tube with some sort of resistance wire heating it for more precise control of the catalytic environment.

 

I'm not sure how the different catalysts would work. I had always assumed it was something like the following:

 

V2O5 + 2 SO2 --> V2O(SO4)2

V2O(SO4)2 ---> V2O3 + 2 SO3

V2O3 + O2 ---> V2O5

 

 

V2O5 + SO2 --> V2O3(SO4)

V2O3(SO4) ---> 2 VO2 + SO3

2 VO2 + 1/2 O2 ---> V2O5

 

Something in that manner wherre the vandium is reduced by the SO2 and reoxidized by the oxygen around. I am unsure how the other two would work since it seems like the reduced form of the sulfate would have to decompose right away, probably via the pyrosulfate route.

[oskarchem]

Humm... One of my cat's pissed on my H3 comp... Well I will still granulate it and see if this effects perfomance.. Who knows

[TheSidewinder]

Nothing like a little extra Urea, eh?

 

Don't think it will matter in performance at all, but you may attract a lot of Tom cats with it.

[Mumbles]

Way back in the day, people used to wet the BP cakes to be pressed with urine. It helped improve burn rate supposedly.

 

You really should keep your compositions and chemicals in a closed area where pets and loved ones cannot get to them.

[qwezxc12]

I feel for ya...My cat once used a tray of drying lift for his litter-box. It was probably the most expensive clumping litter ever...I dried it out, and broke up the clumps...worked fine.

 

When air drying in the sun, I elevate the tray now...

[justanotherpyro]

I try and keep as much as I possibly can in my fireworks shed, but there have been those times that I need to dry things and the only available place was my room. Its very irritating picking up a hundred 1/4 rolled stars that were on the plate before the cat found it amusing to bat it off of the speaker

[oskarchem]

Heh, especially, that once I had pressed stars one by one, it took me like 2hours to accomplish, and I had no more strengh in my arms anymore, so I let my stars dry outside, and when I went to have a look at them, they had all fell off the high table and had broken up...

[WarezWally]

http://www.telegraph.co.uk/news/main.jhtml.../nterror403.xml

 

He added: “The detonator would explode the primary charge of hydrogen peroxide and Tang with lethal effect.”

 

[oskarchem]

Hydrogen peroxde? Do they really take people for idiots or somthing?

[tentacles]

Clearly they've copied an april fool's article from somewhere else...

 

“The detonator would explode the primary charge of hydrogen peroxide and Tang with lethal effect.”

 

I guess that's why they took Tang to the moon - backup fuel in case they needed a little extra boost!

[asilentbob]

Highly concentrated H2O2 plus sugar with mild acids to help destabilize... that sounds possible... retarded... but possible... they supposedly had a primary in empty battery cases...

[WarezWally]

The fact that they wanted to put HMTD in empty metal battery cases with a lightbulb filament to serve as a cap shows that they had no fucking idea and were working off a crapbook.

 

I seriously doubt that their plan would have worked, their cap would have most likely gone off long before they got on the plane and I doubt the tang and peroxide mix would have done anything major.

[pudidotdk]

For star plates, how thick should the female plate be for x mm rods?

[oskarchem]

Wow, It's only benn like 2 days since i haven't been on the forum, and there is already oo much to read... Eh, getting slightly pissed at my exchange sutdent, but any way...

 

I had a thaught, after lighting a commercial sparkler and looking how it burns, I thaught that pyros that live in europe, and don't have acces to time fuse, could use sparklers as the fuse, prime the sparkler in a BP slurry, and well since we don't exactly know what composition commercial sparklers use, for incompatibility purpous, we could put like a paper baggy inside the shell where the parkler penetrates, so that the sparkler comp dosen't come in touch with your stars/burst... What do you think of that?

[Mumbles]

I think you're taking a step backward in the general progression of pyrotechnics. Sparklers are a common fuse of the uninformed. The open flame front, and high temperatures, can cause premature ignition.

 

Since it seems that you're thinking about using it for shells, it is an even worse idea. It may give a pretty rising tail, but I feel they would light too inconsistently to be of any use. Really, how hard are spolettes to make?

[hst45]

Sidewinder, If I read your sig-line right, you've started a new weekly feature, the "Bozone of the week." Are you taking nominations, or is this your own self-generated "award." It might be worth it's own thread. Potential tiles:

 

"Fuck-tard du-jour"

 

"Former brain doners speak out"

 

"Ozzy says...."

 

(Hope I'm not the first recipient )

[mormanman]

I know it would be kind of a waste of time but could one use the sparkler comp on the wire and re-wet it and ram/press into a comet or star?

And mumbles are you saying you can't use a sparkler as a fuse on a aerial shell? With the slow burn time and being excluded from the innards of the shell (if the shell is well contained) it could work and maybe make a nice comet effect.

 

But thats just my thought on the subject.

[Pyrohawk]

Hello all,

 

Havn't been around in a while... But anyhow, I am in the Ohio State University Rocket Club.... They are trying to put a solid rocket to 100,000 ft.. I volunteered for the job of deciding what propellant they should use... So... what the most powerful solid rocket propellant that you guys know of? I have a bunch picked out just looking for more ideas.

 

I might add that the club is a complete joke.....none of them have any clue what they are doing beyond putting togethor a few high power rocket kits (Level 1, and they're club project last year of a Level 2 )and using Tripoli motors.... Some of the stuff they say is pretty ridiculous, I don't know nearly as much about rocketry as pyrotechnics but I know enough to know they are full of crap. And as far as I know am the only one who has ever built his own motors of any size. I'm thinking of quitting actually....

[Mumbles]

You shouldn't quit. They will probably come to terms soon and make you president and then you can rule with an iron fist. It also looks great on a resume.

 

The most powerful I know of are pretty exotic and quite outside the reach of most amateurs, even with University backing. APCP is always a good standard choice. I am in the same situation as you, knowing much more about pyro than rocketry. Give me a call if you need to know how to make a header though.

[TheSidewinder]

Sidewinder, If I read your sig-line right, you've started a new weekly feature, the "Bozone of the week." Are you taking nominations, or is this your own self-generated "award." It might be worth it's own thread. Potential tiles:

 

"Fuck-tard du-jour"

 

"Former brain doners speak out"

 

"Ozzy says...."

 

(Hope I'm not the first recipient )

Thanks, but nominations aren't really necessary.

 

I already have so many potential candidates to choose from.

 

 

Ye Phuquetard of the Weeke.

Darwin Candidate of the Week.

 

So many possibilities...

 

M

[mormanman]

The most powerful I know of are pretty exotic and quite outside the reach of most amateurs, even with University backing.  APCP is always a good standard choice.  I am in the same situation as you, knowing much more about pyro than rocketry.  Give me a call if you need to know how to make a header though.

I'm not positive but isn't the NASA fuel not far out of reach but rather expensive.

 

Space Shuttle Boosters propellant

Source: NASA homepage

Comments:

Preparation:

Aluminum powder...................................16

Ammonium perchlorate..............................69.9

Fe2O3 catalyst....................................0.07

 

I got it from cannon fuse.

I volunteered for the job of deciding what propellant they should use... So... what the most powerful solid rocket propellant that you guys know of?

HERE's a whole list of comps that might help.

[ActionTekJackson]

Just a question, out of curiousity since we're talking rocket comps here, does anyone know what can be substituded for PVC in the GE(II) silicone blue rockets? I just can't seem to not want to make these... ;-)

[Mumbles]

I've always heard the comp was really messy, didn't strobe, and was kind of a crappy propellant.

 

Anyway saran would be my first choice to replace it, but parlon may work as well and improve the strobe.

[asilentbob]

Mormanman, when mumbles said APCP... Ammonium perchlorate composite propellant... it covered the solid shuttle boosters... A very standard composition... Reliable, but not necessarily the most powerful... Pyrohawk would be well aware of this, much like everyone else. No need to make yet more useless posts. Read more throughly. Please. (and you left out the organic rubbery epoxy like binder/fuel anyways...)

 

Started a CafePress shop with some pyro shirts among other things... have various ideas for shirts that are still in the works... Like a brewing one... can't get it like I want it with the software I'm using though... I'd promote the URL for the shop, but I figured I'd wait and see how you feel about that Mumbles. AND I kinda want to get more designs up before I unveil it... The designs will cover things relating to pyro, chem, DIY, brewing, random humor, various quotes, totse stuff, roguesci stuff, computer game stuff, etc... I only have about 6 things up right now...

 

Also... I have quasi-pillow block bearings on the way for my combo adjustable ball mill / star roller... It will be geared down a bit, then fine tuned via a variable transformer. The ball mill part will be adjustable for various sizes of milling containers. Might even add another roller bar so that I could mill 2 different sizes of containers at once... but that would require one more pillow block bearing than I will have at my disposal... That can be somewhat improvised i suppose if the need arises... I just need to get the 1/2" steel roller bars and some lumber...

 

Going to be busy these next few days. Lots of school.

[crazyboy25]

Sounds cool bob I was bored so I just made this design:

 

http://i179.photobucket.com/albums/w318/crazyboy25/shirt.jpg

 

 

I have no intention of making it.