If there is a traffic conflict on inside/high downwind, can a pilot request a closed pattern?

The correct response to whether a pilot can request a closed pattern in the event of a traffic conflict on inside/high downwind is context-dependent, particularly regarding the aircraft's speed limitations during specific phases of flight.

In this instance, only pilots operating at a speed of at least 140 knots indicated airspeed (KIAS) are permitted to request a closed pattern. This speed requirement is crucial because it generally ensures that the aircraft is operating within a performance envelope that allows for safe maneuvering and handling during a closed traffic pattern. At higher speeds, the aircraft is more responsive, which helps to manage spacing and conflict resolution, particularly in environments with potential traffic hazards.

In contrast, if a pilot is below this speed threshold, they may not have adequate control authority or handling capability to navigate effectively in a closed pattern amidst the traffic conflict. This makes maintaining proper separation from other aircraft more challenging, which is why the speed limitation is in place.

Thus, the requirement to be at least 140 KIAS underscores a fundamental principle of flight safety and operational effectiveness within congested airspace.