Rocket Engine Material Purifacation

[cannon freak]

Does any one know of an inexspensive way to take stump remover and make it into a much purer form of potassium nitrate. Im building some rocket motors and do not know of a cheap way to try and purify the stuff. It is usually coated with chemicals (of which kind I do not know) and is difficult to get off. Please Help.

[DAltar]

coffe grinder- warning it wont be used for coffee after you grind up the stup remover

[cannon freak]

Oh I don't mean grinding it up to use it, I mean like getting rid of the coating on the pelits

[PCGUY]

If you want rocket grade then your going to have to buy rocket-grade.

The best stump-remover KNO3 you'll find will be 99% KNO3, but your not goin to get better in a stump remover.

[boilingleadbath]

They are pure enough as-is. It's not worth the effort te get the last couple seconds (measure of specific inpulse, not burn time) out of a rocket candy engein... just make it bigger or get a better nozzle.

[cannon freak]

ok nevermind the brand that I was using had some kind of thick coating of something, not to shure what, but it was quite a bit and would gratly effect the the preformance, and it doesn't come off(Thats what I was trying to talk about), however I was able to find another brand that doesn't have that so Im good.

Ill have to try that coffe grinder idea.

[Benny]

i heard an urban myth that peeing on it dizolves that coating that thay delibratly put on it to stop it oxidising.

[singularity]

if you want potassium nitrate just buy some off ebay its like $1 a pound, i had my friend buy me 11lbs of the stuff (only cause his parents are stupid and dont notice odd charges on there credit cards) kn03 is only an oxidizer you need a fuel try sugar it works real weel, cept i suggest you dont try and cook the mixture in the house because my friend was trying to make smoke bombs and the thing went off on the stove

look at the damages http://home.comcast.net/~irwinner/smoke_bmb.html click on the links at the bottom of the article heres the home page of my site http://home.comcast.net/~irwinner/home.html just in case you get bored with your rockets you can make some explosives

[pyromanic13]

^ both links don't exist

[jrrdw]

There is a rocket forum - www.skyhighrockets.com

Pee on it, yea, sounds like a set up to me, hahha! yea!! just piss on it.

[pyromanic13]

btw whats the name of the stump remover?