When airspeed is at or below 100 kts and moving from flap 0 to flap 1, what configuration results?

When the airspeed is at or below 100 knots and the aircraft is moving from flap configuration 0 to flap configuration 1, the result is CONF 1+F. This configuration is designed for added lift and improved safety margins during takeoff and climb.

The A320 has specific operational parameters that dictate how the flaps can be adjusted based on the airspeed. In this scenario, transitioning from flap 0 (which is the clean configuration) to flap 1 would normally allow for an extension to flap 1. However, if the aircraft remains at or below 100 knots, the system recognizes the need for enhanced lift, typically provided by the flap configuration known as CONF 1+F, which allows for setting the flaps to position 1 while also utilizing the leading-edge slats.

This configuration is crucial for maintaining optimal aerodynamic performance during critical phases of flight, such as takeoff, where management of lift and drag is essential. The presence of the 'F' indicates that the leading-edge slats are also deployed, which works in tandem with the flaps to ensure the aircraft is capable of handling lower speeds while maintaining sufficient lift.

Knowing this helps in understanding the airplane's flap system and its dynamics, especially during