What propells the rocket? A disposable, solid propellant,
model rocket engine. (See cut-away) The engine consists of three phases:
The Thrust Phase - From less than a second to several
seconds, this is what actually propells the rocket skyward.
The Coasting or Tracking Phase - Lasting several seconds,
depending on the weight of the rocket, the rocket is simply coasting toward
apogee during this time. The engine also emits white smoke during this time
for tracking.
The Ejection Phase - This is a small charge that actually
goes off inside the rocket, which pushes the recovery device (usually a
parachute or streamer) out.
ALWAYS be sure to follow the Model
Rocketry Safety Code, and local laws and ordinances.
Here are some rocketry links to follow...
National Association of Rocketry
Shushi Shiota's
Rocketry Page
The Irving Family Website
Mountainside Hobbies
Lunar
Baynar
And if model rocketry seems too tame, check these out:
Tripoli Rocketry
Association
Aeropac
Dangerous Dave's
Tim's Amateur Rocketry