What is meant by "stability margin" in rocketry?

The term "stability margin" in rocketry is defined as the ratio of the distance between the center of gravity (CG) and the center of pressure (CP). This measurement is crucial for determining how stable a rocket will be during flight. A larger stability margin indicates that the center of gravity is further ahead of the center of pressure, which prevents the rocket from tumbling or veering off its intended flight path. This stability is vital for ensuring that the rocket can maintain a straight and controlled ascent.

In contrast, the other options presented do not accurately define stability margin. The maximum weight a rocket can carry does not address the relationship between CG and CP. Similarly, the overall height of the rocket during flight and the minimum altitude for rocket deployment focus on different aspects of rocketry and do not pertain to stability. Understanding stability margin is essential for rocket design and performance, ensuring safe and effective flight trajectories.