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AerodynamicsQuestion 418 of 934

What is the chord line of an airfoil?

  1. A straight line from leading edge to trailing edge
  2. A curved line halfway between the upper and lower surfaces
  3. A line that follows the direction of the relative wind
  4. A line drawn from one wing tip to the other wing tip
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Correct answer: A straight line from leading edge to trailing edge

The chord line is a straight line through the profile connecting the extremities of the leading and trailing edges.

Source: Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), Chapter 4: Principles of Flight — Airfoil Design, page 93

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Questions last reviewed: 18 October 2026