Model Rocket Basics

This diagram illustrates a typical model rocket flight. At (1) the engine is ignited. At (2) the main propellant charge is burning. At (3) the main propellant charge has burned out and the delay charge is burning, producing little or no thrust while the rocket coasts up to it's apogee, or highest altitude. At (4) the ejection charge pressurizes the inside of the body tube, blowing out the nose cone and the attached parachute or streamer (5), allowing the rocket to return safely to Earth (6).
Fight Profile
How a model rocket engine works

What do those letters and numbers on a model rocket engine mean? Here's a simplified explanation:

Model rocket engine rating system
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