Which SCALP function relates to rate of pitch change?

Which SCALP function relates to rate of pitch change?

• A. Streamlines
• B. Pitch Rate
• C. Lateral Sideslip
• D. Collective Coupling

Answer: (B)

The concept here is angular velocity around the pitch axis—the rate at which the nose is changing its attitude. This is captured by the pitch rate signal, which is the time derivative of the pitch angle (dθ/dt). It tells you how quickly the helicopter’s nose is moving, not just where it’s pointing, and is used to damp and stabilize pitch motions by providing immediate feedback about how fast the attitude is changing. The other terms describe different phenomena—streamlines relate to airflow patterns, lateral sideslip to sideways motion relative to the flight path, and collective coupling to how rotor collective input affects other axes—so they don’t describe how fast the pitch is changing. Therefore, the function that relates to rate of pitch change is the pitch rate.

The concept here is angular velocity around the pitch axis—the rate at which the nose is changing its attitude. This is captured by the pitch rate signal, which is the time derivative of the pitch angle (dθ/dt). It tells you how quickly the helicopter’s nose is moving, not just where it’s pointing, and is used to damp and stabilize pitch motions by providing immediate feedback about how fast the attitude is changing. The other terms describe different phenomena—streamlines relate to airflow patterns, lateral sideslip to sideways motion relative to the flight path, and collective coupling to how rotor collective input affects other axes—so they don’t describe how fast the pitch is changing. Therefore, the function that relates to rate of pitch change is the pitch rate.