Wednesday, July 11, 2012

How to make Ammonpulver

Now another high power propellant the Ammonpulver.

The chemicals are Ammonium Nitrate and Charcoal, all of those in a very fine powder as always.

Charcoal is very easy to find and Ammonium Nitrate is a fertilizer but in some countries it will not be so easy to find it because of its nature.

However it can be made by gently pouring nitric acid on ammonia (common household chemicals), this reaction is exothermic so be careful to not auto-ignite the mixture.
I recommend using water ammonia and diluted nitric acid as water will absorbed the heat of the reaction.

You will have a solution of ammonium nitrate you can gently evaporate on a hot plate but do not heat over 150°C because AN thermal decomposition is explosive.

Now that you have all the chemicals, mix them at a proportion of 85% AN and 15% Charcoal.

Bind it if you want and you're ready to go.

However this propellant suffer some issues, "AN/C" is harder to ignite than APCP. My advice is that you use some Rocket Candy (described last week) for the ignition.

And it is also hygroscopic (it absorbs moisture from the air), so you will have to store it in a dry container.

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