Greetings,
I have a simple propellant question. I have not seen references to this particular mixture, so I'm curious both for the chemistry and safety.
A melted mixture ( kids, don't try this at home !! ) of potassium nitrate, sugar, and sulfur - burns reasonably well, but not well enough. Granted there is a difference, in a given reaction, between the carbon released from sugar and the carbon available in powdered charcoal, I have noticed that the same sugar / KNO3 / sulfer mixture burns much faster when modified to include 1% powdered charcoal.
Is the charcoal acting as a catalyst? - and if so how.
Could the addition of charcoal lower the effective auto-ignition temperature of the mix ?
Could it be any more dangerous to make ?
Interesting feedback would be appreciated.
Cursory cautionary note; Propellant making is interesting, but cannot be done safely without taking every precaution. It's not possible, really, to take every precaution, so don't make propellants .. besides it's tedious and you'll rarely launch anything.