AI.VII.L.R2c

From the FAA library

• Aeronautical Information Manualp. 7-4-4
  Chapter 7. Safety of Flight › Section 4. Wake Turbulence › 7-4-4. Vortex Behavior

  time and hasten the drift of the downwind vortex toward another runway. (See FIG 7-4-6.) Similarly, a tailwind condition can move the vortices of the preceding aircraft forward into the touchdown zone. THE LIGHT QUARTERING TAILWIND REQUIRES MAXIMUM ... aircraft upwind from their approach and takeoff flight paths. (See FIG 7-4-7.) Vortex Movement in Ground Effect - Tailwind…

• Pilot's Handbook of Aeronautical Knowledgep. 11-15
  Chapter 11: Aircraft Performance › Takeoff and Landing Performance › Takeoff Performance

  allow the aircraft to reach the lift-off speed at a lower groundspeed, while the effect of a tailwind is to require the aircraft to achieve a greater groundspeed to attain the lift-off speed. A headwind that ... percent of the takeoff airspeed reduces the takeoff distance approximately 19 percent. However, a tailwind that is 10 percent of the takeoff airspeed increases the takeoff distance approximately 21 percent. In the case where the headwind speed is 50 percent…

• Pilot's Handbook of Aeronautical Knowledgep. 12-10
  Chapter 12: Weather Theory › Wind and Currents › Low-Level Wind Shear

  aircraft. It can rapidly change the performance of the aircraft and disrupt the normal flight attitude. For example, a tailwind quickly changing to a headwind causes an increase in airspeed and performance. Conversely, a headwind changing to a tailwind causes…

• Seaplane, Skiplane, and Float/Ski Equipped Helicopter Operations Handbookp. 4-15
  SKIPPING › DOWNWIND TAKEOFFS

  drag is much greater than the increase in rolling resistance of tires and wheel bearings in a landplane. A tailwind may lengthen the seaplane’s takeoff distance much more dramatically than the same tailwind in a landplane. Nevertheless, there…

• Seaplane, Skiplane, and Float/Ski Equipped Helicopter Operations Handbookp. 8-4
  SELECT TOUCHDOWN AREA › LANDING WITH MORE THAN ONE SWELL SYSTEM

  swell system is present, it may be desirable to land downswell to the secondary swell system and accept some tailwind component. The risks associated with landing downwind versus downswell must be carefully considered. The choice of heading depends…

• Aeronautical Information Manualp. 7-1-51
  Chapter 7. Safety of Flight › Section 1. Meteorology › 7-1-24. Microbursts

  winds near the surface can be as strong as 45 knots resulting in a 90 knot shear (headwind to tailwind change for a traversing aircraft) across the microburst. These strong horizontal winds occur within a few hundred feet ... this is followed in short succession by a decreasing headwind component (2), a downdraft (3), and finally a strong tailwind (4), where 2 through 5 all result in decreasing performance of the airplane. Position (5) represents an extreme situation just…