Wasn't sure how to word my post heading, but here goes.
My son and I we watching arrivals and departures at MDT (Harrisburg Int'l, Pa) from our patio the other night. (with binoculars, since the airport is about 20 miles away) MDT has a single 10500ft runway.
Most commonly rwy33 is in use. Planes arriving from the southeast, taking off towards the northwest. This is how it is most of the time.
Now, I know that, depending on the prevailing winds, they will shift ops to rwy13. (landings from the northwest, take offs towards the southeast)
There is a question here.
What would cause a shift from 33 to 13, but not for all a/c?
Example: we see 10 arrivals and 10 departures on 33, then 1 t/o on 13, then 5 more arrivals on 33.
Under what circumstances would they allow one a/c to take off on 13 when all other traffic is using 33?
Jr asked me and I didn't have an answer for him.
Thanks in advance!