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AI.VII.F.R2cFAA-S-ACS-25 · Nov 2023Risk management

c. Tailwind

ACS element text (the applicant demonstrates understanding of)

Effects of: c. Tailwind

Bottom line

A tailwind requires the aircraft to achieve a greater groundspeed to attain lift-off speed. A tailwind that is 10 percent of the takeoff airspeed increases the takeoff distance approximately 21 percent. A tailwind condition can move the vortices of a preceding aircraft forward into the touchdown zone.

FAA references

  1. PHAK ch. 11 (p. 11-15) — FAA-H-8083-25C (2023)
  2. AIM 7-4-4 (Vortex Behavior) — AIM Basic 2/20/25 w/ Change 1 (8/7/25) & Change 2 (1/22/26)
  3. PHAK ch. 12 (p. 12-11) — FAA-H-8083-25C (2023)
  4. PHAK ch. 14 (p. 14-28) — FAA-H-8083-25C (2023)
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