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Could this Oxidiser be used? Answered

could i use ammonium nitrate for making a fuse. by combing the powder with glue and the on the string? Thanks!

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killerjackalope
killerjackalope

11 years ago

not sure, only one way to find out...

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killerjackalope
killerjackalope

11 years ago

it keeps ok, you can always heat it gently to remove water, keeping it in an airtight container with some silical packages seems sensible... I used Ziploks, now I wish I still had some, though in rooting through my room I found a big bag of magnesium ribbon...

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killerjackalope
killerjackalope

11 years ago

Oh I was talking rubbish about mcgyver... However the water based glue may work, dry it in the sun, the oven may be a bit hot for the glue... Another option would be to make a paste of AN and glue in a jar, push a bunch of string in, allow to sit and then pull it through a hole in the lid for a nice even and reliable burn rate...

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Kiteman
Kiteman

11 years ago

PVA is general "white" glue (such as wood glue). It's water-based, which should make it easier to mix in the AN.

I think

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killerjackalope
killerjackalope

Reply 11 years ago

Wood glue will work just fine, it's usually just a stronger PVA based glue...

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Kiteman
Kiteman

Reply 11 years ago

Actually, you know those solvent-based glues? You can draw a line on the ground with a tube of those, light one end and get a pretty blue flame racing along the glue. I imagine that would make a Mcgyver (Magyver? McGyver?) -worthy fuse at any rate.

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killerjackalope
killerjackalope

Reply 11 years ago

Hmm then again so would water... Tippex works in a similar fashion, the best thing I can think of is a simple wick fuse, make one with candle wax or possibly lighter fuel, you can use a synthetic fuse too since it's not too important if it destroys itself, the petrol one would be dipsensed from a jar with fuel in it and a wick hole in the top, this would also double as a handy lantern for when Mcgyver's burning water dries up...

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westfw
westfw

11 years ago

So slow (and correspondingly "mild") that it will fail to reliably burn through any sort of constriction, leaving you with the most dangerous sort of fuse possible. ("did it go out? I can't tell!")
Budding pyro experimenters should buy real "visco" fuse, or use electrical ignition. IMO.

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Goodhart
Goodhart

Reply 11 years ago

I agree....I have experience with a homemade fuse made of KNO3 and charcoal that was nearly fatal. I don't recommend this either if it can be avoided (unless you can provide stringent controls over how it is made)

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tech-king
tech-king

Reply 11 years ago

thats definitely the most dangerous situation, tying with unexploded projectiles falling back down.

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Kiteman
Kiteman

11 years ago

You know that bit where I said "the exact proportions would need some experimentation"?

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killerjackalope
killerjackalope

11 years ago

Oh god it's been so long It was 4AN to 1Al works well but so does 3AN to 1Al I just used atomised aluminium powder, from a casting shop, along with standard garden supply ammonium nitrate, ground from pellets in a pestle an mortar, not too fine though, it doesn't seem to be very reliable when ground very fine. You will need some form of blasting cap as this mixture wont detonate unless started by a detonation... It's alot more powerful than it looks, an inch of pvc pipe (1" diameter) will make a fair blast, it has some very odd properties though, a likeminded friend and I were doing water detonations and one charge leaked into the water and you could see the stuff floating out but it still detonated...

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killerjackalope
killerjackalope

11 years ago

Umm I may actually have been wrong, I forgot it's a different reaction still, so it may not work, how about flash powder or black powder...

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tech-king
tech-king

Reply 11 years ago

i seem to recal that mixing sugar with potassium something-or-other-ill-check-later at a ratio of 9:1 produces an incendiary mixture that is percussion detonated

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killerjackalope
killerjackalope

Reply 11 years ago

It's heat detonated I thought... I don't know as much as I should, alsway stuck to HMDT and alumium and ammonium nitrate, HMDT is excellent for blasting caps and stuff, made in rough conditions it's good with visco fuse, if it's very pure it's a nuisance due to friction...

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Kiteman
Kiteman

Reply 11 years ago

I've been thinking about this. Ammonium nitrate is a decent oxidiser, and will help many things to burn more effectively. I think that mixing AN to a paste with PVA (the exact proportions would need some experimentation), then coating a string with that mixture and letting it dry should make a useful fuse.

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iman
iman

11 years ago

just look on ebay for cannon fuse I got 100 feet for ten bucks including shipping Its much safer.

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killerjackalope
killerjackalope

11 years ago

yeah use something like sugar to add to it if necessary though AN should do it, it works almost exactly the same as KNO3 in many reactions, thought eh by products change alot...

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killerjackalope
killerjackalope

Reply 11 years ago

well actually point raised below it's slower... I rarely work with fuses so forget those details, Visco is nice reliable and not expensive...

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tech-king
tech-king

11 years ago

depends. soaked in diesel, a small explosion will cause a massive explosion from the ammonia.

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westfw
westfw

11 years ago

usually ammonium nitrate is too hygroscopic and too slow burning to be useful in a fuse.