What is the main difference between alternate law ground mode and normal law ground mode?

The key distinction between alternate law ground mode and normal law ground mode lies in their respective flight control characteristics and behaviors. In normal law ground mode, the aircraft maintains stability and control with features such as pitch commands based on load factor and roll commands based on roll rate. These elements ensure a certain level of responsiveness and coordination, making controlling the aircraft more intuitive for the pilot.

In contrast, alternate law ground mode indicates a degradation in the flight control laws that may limit some of the protections and commands available in normal law. For instance, the aircraft may not respond with the same autonomy and precision under alternate law, particularly in conditions where normal law characteristics could enhance safety and handling.

Understanding this distinction is crucial for pilots to adapt their flying techniques based on the flight control laws in effect, ensuring proper handling of the aircraft under varying scenarios.