Tailwind Takeoffs: Why Your Instructor May Be Wrong About Them

Where do you fly when the windsock is dead calm?

A red and white windsock. [Adobe Stock]
A red and white windsock. [Adobe Stock]
Gemini Sparkle

Key Takeaways:

  • Aircraft must take off and land into a headwind to achieve liftoff speed at a lower ground speed, reducing takeoff distance and improving overall performance.
  • Taking off with a tailwind is dangerous as it requires a significantly higher ground speed to achieve liftoff, leading to poorer performance and a higher risk of running out of runway.
  • To properly read a windsock for takeoff and landing, aircraft should always fly "out of the mouth" (the wider opening) of the sock, indicating flight into the wind.
  • In calm wind conditions, pilots should consult the FAA Airport Chart Supplement for preferred runways, which may be designated for reasons like noise abatement or obstacle avoidance.
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Question: I am a student pilot and I moved out of state so I had to change instructors. I swear my old instructor taught me to take off with a tailwind following the pointy end of the windsock. My new instructor says that’s backward. As I understand it you have to reach a certain airspeed before you can take off. Wouldn’t having a tailwind assist that? What are you supposed to do when the windsock indicates dead calm?  

Answer: I think something got lost in translation here. Taking off into the wind allows the aircraft to reach liftoff speed at a lower ground speed. That wind on the nose helps this process. This reduces the takeoff distance and gets the aircraft into the air quicker and provides better performance.

Taking off with a tailwind does the opposite. The aircraft has to reach a higher ground speed to reach liftoff speed, and will have poorer performance. Depending on the length of the runway, you can run out of runway and options at the same time. Landing with a tailwind also produces poor performance. 

As far as which runway to use, check the FAA Airport Chart Supplement for details. Some airports have preferred calm wind runways (usually due to noise abatement), and there are even some with “one-way runways.”  These are usually due to obstacles on the approach and departure ends of the runway.

As far as how to read the windsock, think of it this way: On takeoff and landing, airplanes fly out of the mouth (big part) of the sock.

Ask us anything you’ve ever wanted to know about aviation. Our experts in general aviation, flight training, aircraft, avionics, and more may attempt to answer in a future article. Email your questions here.

Meg Godlewski

Meg Godlewski has been an aviation journalist for more than 24 years and a CFI for more than 20 years. If she is not flying or teaching aviation, she is writing about it. Meg is a founding member of the Pilot Proficiency Center at EAA AirVenture and excels at the application of simulation technology to flatten the learning curve. Follow Meg on Twitter @2Lewski.

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