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SESK: Stuff Everyone Should Know · sesk.info/comm-headwind-takeoff-groundspeed

How does a headwind help shorten the takeoff run?

It lets you reach lift-off speed at a lower groundspeed.

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  1. It lets the airplane reach lift-off speed at a lower groundspeed ✔
  2. It increases engine power
  3. It lowers the stall speed

Why: Lift depends on airspeed, not groundspeed. With a headwind you get the needed airspeed while moving more slowly over the ground, so you use less runway. A tailwind does the opposite.

Huh, didn't know that: A headwind of 10 percent of takeoff airspeed cuts takeoff distance about 19 percent; the same tailwind adds about 21 percent.

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When are your eyes not eyes? When the cold wind makes them water!
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References

Answer: It lets the airplane reach lift-off speed at a lower groundspeed. Lift depends on airspeed, not groundspeed. With a headwind you get the needed airspeed while moving more slowly over the ground, so you use less runway. A tailwind does the opposite.

  1. PHAK ch 11, Aircraft Performance (FAA-H-8083-25C) www.faa.gov/sites/faa.gov/files/13_phak_ch11.pdf
    reach the lift-off speed at a lower groundspeed
    Checked 2026-10-11.
  2. PHAK ch 11, Aircraft Performance (FAA-H-8083-25C) www.faa.gov/sites/faa.gov/files/13_phak_ch11.pdf
    achieve a greater groundspeed to attain the lift-off speed.
    Checked 2026-10-11.
  3. PHAK ch 11, Aircraft Performance (FAA-H-8083-25C) www.faa.gov/sites/faa.gov/files/13_phak_ch11.pdf
    A headwind that is 10 percent of the takeoff airspeed reduces the takeoff distance approximately 19 percent.
    Checked 2026-10-11.
  4. PHAK ch 11, Aircraft Performance (FAA-H-8083-25C) www.faa.gov/sites/faa.gov/files/13_phak_ch11.pdf
    tailwind that is 10 percent of the takeoff airspeed increases the takeoff distance approximately 21 percent.
    Checked 2026-10-11.

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