What is the minimum separation time required to clear a King Air for takeoff when a B744 is executing a low approach on the opposite runway?

The minimum separation time required to clear a King Air for takeoff when a Boeing 747-400 (B744) is executing a low approach on the opposite runway is three minutes. This is based on the potential wake turbulence generated by the larger aircraft, along with the operational requirements for separation between an arriving or departing aircraft and one that is conducting a low approach.

The B744 is a heavy aircraft and generates significant wake turbulence, particularly in the form of vortices that can affect smaller aircraft like the King Air. Given the time required for the vortices to dissipate, air traffic control protocols mandate a minimum separation time that allows for safety in operations, taking into account the size difference and the respective flight paths of the aircraft involved.

It's crucial to maintain this separation to ensure that the smaller aircraft can safely commence its takeoff without being adversely affected by the turbulence produced by the B744. The three-minute separation aligns with established guidelines and helps enhance safety during critical phases of flight like takeoff.