Which flight conditions create the most severe flight
hazard by generating wingtip vortices of the greatest strength?
Answer: The greatest vortex strength occurs when the
generating aircraft is HEAVY, CLEAN, and SLOW.
What effect would a light crosswind have on the
wingtip vortices generated by a large airplane that has just taken off?
Answer: A crosswind will decrease the lateral movement
of the upwind vortex and increase the movement of the downwind vortex.
Thus a light wind with a cross runway component of 1
to 5 knots could result in the upwind vortex remaining in the touchdown zone
for a period of time and hasten the drift of the downwind vortex toward another
runway.
What wake turbulence separation is required for small
aircraft following bigger airplanes on landing approach?
Answer: ATC separation minimums for wake turbulence
during the landing approach are provided for small aircraft.
|
Small
behind large aircraft
|
4
miles
|
|
Small
behind B757 aircraft
|
5
miles
|
|
Small
behind heavy jet
|
6
miles
|