What does the rate of descent on the glide slope depend on?

The rate of descent on the glide slope primarily depends on ground speed. During an approach, the glide slope angle is typically set to provide a standard descent path towards the runway, commonly at a 3-degree slope. The ground speed of the aircraft plays a critical role in determining how quickly the aircraft needs to descend to stay on this path.

As ground speed increases, the rate of descent must also increase to ensure that the aircraft maintains the correct glide slope. Conversely, if the ground speed is lower, a gentler descent rate is required. Therefore, the relationship between ground speed and rate of descent is essential for maintaining the proper glide slope and ensuring a safe and stable approach to landing.

While aircraft weight, wind direction, and altitude can influence various aspects of flight and approach procedures, they do not directly dictate the rate of descent on the glide slope in the same fundamental way that ground speed does.