I picked up a chunk of solid rocket fuel from a rocket that had exploded at the pad. A few pounds of sort of rubbery compound, yellowish and not particularly grainy. I took it home and put it in the woodstove and burned it. It wasn't easy to get it to burn and it burned hard--took a good roaring wood fire. Even then, I don't think it added much to the fire, but it did combust fully eventually.
> It wasn't easy to get it to burn and it burned hard--took a good roaring wood fire.
Modern solid rocket propellants don't burn well at low pressures. When the Shuttle RSRM is fired on the static pad, there's always a goodly amount of propellant left over... propellant that was snuffed out when the pressure got too low at burnout. I can explain the physics, but it's boring.