What happens to the Green Dot during flap retraction when the F-bug disappears?

During flap retraction, when the F-bug, which indicates the flap retraction schedule, disappears, the Green Dot, representing the aircraft's optimal speed for a clean configuration (flaps up) typically increases. This increase is generally around 10 knots. The reason for this increase is that as the flaps are retracted, the aircraft's aerodynamic configuration changes, thus requiring a higher speed for optimal performance and to maintain control.

It's important to recognize that the Green Dot is closely linked to the aircraft’s current configuration and is designed to provide the crew with a target speed that enhances performance during various flight phases. When transitioning from a configuration with flaps extended to a clean configuration, the aerodynamic forces acting on the aircraft evolve, necessitating an adjustment to the Green Dot speed to ensure safety and efficiency in flight handling.