When can DAL201, an MD81, begin its takeoff roll if UAL433, a DC10, has just departed Runway 28R?

DAL201 can begin its takeoff roll 2 minutes after UAL433's takeoff roll to ensure safe separation between the departing aircraft. The timing is crucial in air traffic control to maintain adequate spacing and prevent wake turbulence issues.

When UAL433 departs, it creates a wake turbulence risk, which is most pronounced during the aircraft's takeoff roll and initial climb. The specified wait time allows DAL201 to take into account the performance characteristics of the aircraft, ensuring it has enough time to safely take off without encountering any turbulence caused by UAL433.

Since the separation requirement focuses on the initial phase of flight, timing from the takeoff roll rather than rotation is more pertinent in this context. It ensures DAL201 can takeoff safely without experiencing wake turbulence or being at risk of being too close to the departing DC10.