One common fuel for amateur rockets in the old days was "sugar candy". A mix of potassium nitrate and sugar. You had to melt it *very* carefully. Then pour it into the tube, with an insert to leave the right shaped hole if you didn't want an "end burning" grain.
Potassium chlorate is a stronger oxidizer, and molten, I can see it self igniting.
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One common fuel for amateur rockets in the old days was "sugar candy". A mix of potassium nitrate and sugar. You had to melt it *very* carefully. Then pour it into the tube, with an insert to leave the right shaped hole if you didn't want an "end burning" grain.
Potassium chlorate is a stronger oxidizer, and molten, I can see it self igniting.