When you buy our "How To Make Amateur Rockets" book, software and video set, you join a growing international community of fellow amateur rocketeers who have bought our books. There is a significant chance for self-ignition while mixing, which could lead to serious injury. Most often, however, a small amount of carbon is used as an opacifier, making a visible smoke trail. Additives are often added to rocket propellants to modify their burn properties. Black powder, regardless of how fine it is ground, in the initial dry mix state is not very powerful. Then the right proportions of each are milled together. Coffee Mill A coffee mill does a job similar to a blender but it works a little better.
These propellants are harder to ignite than black powder or sugar based propellants and require a longer burning, more intense igniter. Compressed propellant is prepared dry but may be wet at some stage of the preparation. The picture below is from the Handbook of Model Rocketry by G. In high concentration, hydrogen peroxide decomposes rapidly with a silver catalyst.
Ammonium dinitramide, NH 4 N NO 2 2 , is being considered as a 1-to-1 chlorine-free substitute for ammonium perchlorate in composite propellants. Some parts it should be obvious which are the author's opinions. There is a sliding scale of price and performance: The inner lid is rubber with an aluminum disk molded into it for stiffness. Rocket engines Rocket propulsion Rocket engines by propellant Solid-fuel rockets Solid fuels. From a safety standpoint, aluminum is not better than PVC.