What should the flier document regarding the high-power rocket's physical properties?

The key physical properties of a high-power rocket that a flier should document are the center of gravity and the center of pressure. The center of gravity is crucial because it represents the point where the mass of the rocket is balanced, affecting the rocket's stability and performance during flight. This is especially important in high-power rocketry, where precise balance is necessary for stable flight and recovery.

The center of pressure, on the other hand, is the point where the aerodynamic forces act on the rocket. Understanding the relationship between the center of pressure and the center of gravity helps predict how the rocket will behave during flight. If the center of pressure is too far behind the center of gravity, the rocket may become unstable and tumble; if it is too far forward, the rocket may be overly stable and difficult to control.

Therefore, documenting these two properties helps ensure that the rocket is designed and constructed for safe and effective flight, making this choice integral to the safe operation of high-power rockets.