Solid+Propellant+Model+Rocket+Engine


 * 1) The __clay nozzle__ is located at the bottom of the rocket engine. The narrow opening of the nozzle is designed to increase the velocity (speed) of the hot gases leaving the engine. This downward force overcomes gravity and provides the thrust needed for lift-off and acceleration of the rocket.
 * 2) The __cardboard casing__ is the outside wall that holds the contents of the rocket engine.
 * 3) The __thrust charge__, when ignited, gives off hot gases that are forced through the clay nozzle at great speed. The upward force of this charge develops the propulsion needed for lift-off and acceleration.
 * 4) The __delay charge__ provides a visible white smoke to help the observer track the rocket. This charge lasts approximately three seconds.
 * 5) The __ejection charge__ pressurizes the body tube forcing the nose cone and recovery system out of the body tube. This allows the recovery system (parachute or streamer) to deploy and bring the rocket safely to the ground.
 * 6) The __clay retainer cap__ keeps the three charges in place.